STERLING CHEMICALS HOLDINGS INC /TX/
10-Q, 1997-05-15
INDUSTRIAL ORGANIC CHEMICALS
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<PAGE>
 
- -------------------------------------------------------------------------------
- -------------------------------------------------------------------------------
 
               UNITED STATES SECURITIES AND EXCHANGE COMMISSION
                            WASHINGTON, D.C. 20549
 
                                   FORM 10-Q
 
                               ----------------
 
[X] QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES
   EXCHANGE ACT OF 1934 FOR THE QUARTERLY PERIOD ENDED March 31, 1997
 
                                      OR
 
[ ] TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES
   EXCHANGE ACT OF 1934 FOR THE TRANSITION PERIOD FROM       TO
 
COMMISSION FILE NUMBER 1-10059
 
                       STERLING CHEMICALS HOLDINGS, INC.
            (EXACT NAME OF REGISTRANT AS SPECIFIED IN ITS CHARTER)
 
              DELAWARE                                 76-0185186
   (STATE OR OTHER JURISDICTION OF        (I.R.S. EMPLOYER IDENTIFICATION NO.)
   INCORPORATION OR ORGANIZATION)
 
    1200 SMITH STREET, SUITE 1900
      HOUSTON, TEXAS 77002-4312                      (713) 650-3700
   (ADDRESS OF PRINCIPAL EXECUTIVE           (REGISTRANT'S TELEPHONE NUMBER,
              OFFICES)                            INCLUDING AREA CODE)
 
       SECURITIES REGISTERED PURSUANT TO SECTION 12(B) OF THE ACT: NONE
 SECURITIES REGISTERED PURSUANT TO SECTION 12(G) OF THE ACT: COMMON STOCK, PAR
                             VALUE $.01 PER SHARE
 
COMMISSION FILE NUMBER 333-04343-01
 
                           STERLING CHEMICALS, INC.
            (EXACT NAME OF REGISTRANT AS SPECIFIED IN ITS CHARTER)
 
              DELAWARE                                 76-0502785
   (STATE OR OTHER JURISDICTION OF        (I.R.S. EMPLOYER IDENTIFICATION NO.)
   INCORPORATION OR ORGANIZATION)
 
    1200 SMITH STREET, SUITE 1900
      HOUSTON, TEXAS 77002-4312                      (713) 650-3700
   (ADDRESS OF PRINCIPAL EXECUTIVE           (REGISTRANT'S TELEPHONE NUMBER,
              OFFICES)                            INCLUDING AREA CODE)
 
       SECURITIES REGISTERED PURSUANT TO SECTION 12(B) OF THE ACT: NONE
       SECURITIES REGISTERED PURSUANT TO SECTION 12(G) OF THE ACT: NONE
 
  Sterling Chemicals, Inc. meets the conditions set forth in General
Instruction H(1)(a) and (b) of Form 10-Q, and is therefore filing this form
with the reduced disclosure format provided for by General Instruction H(2) of
Form 10-Q.
 
                               ----------------
 
  Indicate by check mark whether each of the registrants (1) has filed all
reports required to be filed by Section 13 or 15(d) of the Securities Exchange
Act of 1934 during the preceding 12 months (or for such shorter period that
the registrant was required to file such reports), and (2) has been subject to
such filing requirements for the past 90 days. Yes  X  No
 
  As of May 9, 1997, Sterling Chemicals Holdings, Inc. had 11,974,171 shares
of common stock outstanding. As of such date, the aggregate market value of
such common stock held by nonaffiliates, based upon the last sales price of
these shares as reported on the OTC Electronic Bulletin Board maintained by
the National Association of Securities Dealers, Inc., was approximately $141
million. As of May 9, 1997, all outstanding equity securities of Sterling
Chemicals, Inc. were owned by Sterling Chemicals Holdings, Inc.
 
 
- -------------------------------------------------------------------------------
- -------------------------------------------------------------------------------
<PAGE>
 
  This combined Form 10-Q is separately filed by Holdings and Chemicals (each
as defined herein). Information contained herein relating to Chemicals is
filed by Holdings and separately by Chemicals on its own behalf. Certain
capitalized terms used in this Form 10-Q are defined in the Notes to Condensed
Consolidated Financial Statements, included herein.
 
PART I.--FINANCIAL INFORMATION
 
ITEM 1.--FINANCIAL STATEMENTS
 
                                       2
<PAGE>
 
                       STERLING CHEMICALS HOLDINGS, INC.
 
                     CONDENSED CONSOLIDATED BALANCE SHEETS
                        (IN THOUSANDS EXCEPT SHARE DATA)
                                  (UNAUDITED)
 
<TABLE>
<CAPTION>
                                MARCH 31,  SEPTEMBER
                                  1997     30, 1996
                                ---------  ---------
<S>                             <C>        <C>
ASSETS
Current assets:
  Cash and cash equivalents.... $   6,280  $   5,609
  Accounts receivable..........   159,653    133,399
  Inventories..................    75,819     53,720
  Prepaid expenses.............    16,746     10,226
  Deferred income taxes........     6,616      6,064
                                ---------  ---------
  Total current assets.........   265,114    209,018
Property, plant and equipment,
 net...........................   439,565    365,765
Other assets...................   127,166    114,901
                                ---------  ---------
    Total assets............... $ 831,845  $ 689,684
                                =========  =========
LIABILITIES AND STOCKHOLDERS'
 EQUITY (DEFICIENCY IN ASSETS)
Current liabilities:
  Accounts payable............. $  70,372  $  66,562
  Accrued liabilities..........    63,608     53,898
  Current portion of long-term
   debt........................    22,015     11,625
                                ---------  ---------
    Total current liabilities..   155,995    132,085
Long-term debt.................   808,576    714,632
Deferred income taxes..........    47,226     46,933
Deferred credits and other
 liabilities...................    89,643     68,473
Common stock held by ESOP......     7,688      6,500
Less: unearned compensation....    (6,620)    (6,500)
Redeemable preferred stock.....    10,162         --
Commitments and contingencies
Stockholders' equity
 (deficiency in assets):
  Common stock, $.01 par value,
   20,000,000 shares
   authorized, 11,333,000
   shares issued; 11,326,000
   outstanding at March 31,
   1997; and 10,599,000 shares
   issued and outstanding at
   September 30, 1996..........       113        106
  Additional paid-in capital...  (551,271)  (560,077)
    Retained earnings..........   291,480    306,656
    Accumulated translation
     adjustment................   (21,061)   (19,124)
                                ---------  ---------
                                (280,739)   (272,439)
    Treasury stock, at cost,
     7,000 shares at March 31,
     1997......................       (86)        --
                                ---------  ---------
      Total stockholders'
       equity (deficiency in
       assets)...................(280,825)  (272,439)
                                ---------  ---------
        Total liabilities and
         stockholders' equity
         (deficiency in
         assets)............... $ 831,845  $ 689,684
                                =========  =========
</TABLE>
 
   The accompanying notes are an integral part of the condensed consolidated
                             financial statements.
 
                                       3
<PAGE>
 
                       STERLING CHEMICALS HOLDINGS, INC.
 
                CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS
                      (IN THOUSANDS EXCEPT PER SHARE DATA)
                                  (UNAUDITED)
 
<TABLE>
<CAPTION>
                                            THREE MONTHS     SIX MONTHS ENDED
                                           ENDED MARCH 31,       MARCH 31,
                                          ------------------ ------------------
                                            1997      1996     1997      1996
                                          --------  -------- --------  --------
<S>                                       <C>       <C>      <C>       <C>
Revenues................................. $239,763  $190,879 $426,689  $382,421
Cost of goods sold.......................  222,936   161,481  394,779   323,628
                                          --------  -------- --------  --------
Gross profit.............................   16,827    29,398   31,910    58,793

Selling, general, and administrative
 expenses................................    7,223     8,298   13,349    16,108
Stock appreciation rights expense........       --     6,447       --     6,658
Other expense............................       --     3,550       --     3,550
Interest and debt related expenses, net
 of interest income......................   20,850     1,601   39,474     3,210
                                          --------  -------- --------  --------

Income (loss) before income taxes........  (11,246)    9,502  (20,913)   29,267

Provision (benefit) for income taxes.....   (3,435)    3,075   (5,904)   10,053
                                          --------  -------- --------  --------

Net income (loss)........................   (7,811)    6,427  (15,009)   19,214
Preferred stock dividend.................      162        --      162        --
                                          --------  -------- --------  --------

Net income (loss) attributable to common
 stockholders............................ $ (7,973) $  6,427 $(15,171) $ 19,214
                                          ========  ======== ========  ========
Net income (loss) per common share....... $ (0.72)  $   0.12 $  (1.40) $   0.35
                                          ========  ======== ========  ========
Weighted average shares outstanding......   11,118    55,690   10,860    55,682
</TABLE>
 
 
   The accompanying notes are an integral part of the condensed consolidated
                             financial statements.
 
                                       4
<PAGE>
 
                       STERLING CHEMICALS HOLDINGS, INC.
 
                CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS
                                 (IN THOUSANDS)
                                  (UNAUDITED)
 
<TABLE>
<CAPTION>
                                                             SIX MONTHS ENDED
                                                                 MARCH 31,
                                                             ------------------
                                                               1997      1996
                                                             --------  --------
<S>                                                          <C>       <C>
Cash flows from operating activities:
  Cash received from customers.............................. $441,473  $422,542
  Miscellaneous cash receipts...............................    9,368    11,044
  Cash paid to suppliers and employees...................... (414,540) (404,391)
  Interest paid.............................................  (28,579)   (3,280)
  Interest received.........................................      266       538
  Income taxes paid (refunded)..............................    1,433   (10,303)
                                                             --------  --------
Net cash provided by operating activities...................    9,421    16,150
                                                             --------  --------
Cash flows from investing activities:
  Capital expenditures......................................  (25,154)  (48,996)
  Purchase of assets-acrylic fibers business................  (88,200)       --
  Proceeds-sale of assets...................................       16        --
                                                             --------  --------
Cash used in investing activities........................... (113,338)  (48,996)
Cash flows from financing activities:
  Proceeds from long-term debt..............................  146,900    38,000
  Repayment of long-term debt...............................  (50,072)  (34,392)
  Issuance of common stock..................................   12,339        --
  Purchase of treasury stock................................     (613)       --
  Other.....................................................   (3,889)     (289)
                                                             --------  --------
Net cash provided by financing activities...................  104,665     3,319
                                                             --------  --------
Effect of exchange rate on cash.............................      (77)      (94)
                                                             --------  --------
Net increase (decrease) in cash and cash equivalents........      671   (29,621)
Cash and cash equivalents--beginning of period..............    5,609    30,882
                                                             --------  --------
Cash and cash equivalents--end of period.................... $  6,280  $  1,261
                                                             ========  ========
</TABLE>
 
 
   The accompanying notes are an integral part of the condensed consolidated
                             financial statements.
 
                                       5
<PAGE>
 
                       STERLING CHEMICALS HOLDINGS, INC.
 
          CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS, (CONTINUED)
                                 (IN THOUSANDS)
                                  (UNAUDITED)
 
                  RECONCILIATION OF NET INCOME (LOSS) TO CASH
                        PROVIDED BY OPERATING ACTIVITIES
 
<TABLE>
<CAPTION>
                                                            SIX MONTHS ENDED
                                                               MARCH 31,
                                                            -----------------
                                                              1997     1996
                                                            --------  -------
<S>                                                         <C>       <C>
Net income (loss).......................................... $(15,009) $19,214
Adjustments to reconcile net income (loss) to net cash
 provided by operating activities:
  Depreciation and amortization............................   25,164   21,188
  Loss on disposal of assets...............................        7    3,329
  Deferred tax expense.....................................    3,124    1,600
  Accrued compensation.....................................       --    6,850
  Unearned compensation....................................    1,067       --
  Discount note amortization...............................    7,507       --
Change in:
  Accounts receivable......................................  (30,299) (15,570)
  Inventories..............................................    1,201    8,960
  Prepaid expenses.........................................   (6,241)    (912)
  Other assets.............................................   (7,317)  (5,589)
  Accounts payable.........................................    6,999  (10,727)
  Accrued liabilities......................................    7,149  (18,829)
  Interest payable.........................................    6,783      705
  Taxes payable............................................   (1,234)    (840)
  Other liabilities........................................   10,520    6,771
                                                            --------  -------
Net cash provided by operating activities.................. $  9,421  $16,150
                                                            ========  =======
</TABLE>
 
 
   The accompanying notes are an integral part of the condensed consolidated
                             financial statements.
 
                                       6
<PAGE>
 
                            STERLING CHEMICALS, INC.
 
                     CONDENSED CONSOLIDATED BALANCE SHEETS
                      (IN THOUSANDS EXCEPT PER SHARE DATA)
                                  (UNAUDITED)
 
<TABLE>
<CAPTION>
                                                         MARCH    SEPTEMBER 30,
                                                        31, 1997      1996
                                                        --------  -------------
<S>                                                     <C>       <C>
ASSETS
Current assets:
  Cash and cash equivalents............................ $  6,280    $  5,581
  Accounts receivable..................................  167,209     135,635
  Inventories..........................................   75,819      53,720
  Prepaid expenses.....................................   14,739      10,226
  Deferred income taxes................................    6,616       6,064
                                                        --------    --------
    Total current assets...............................  270,663     211,226
Property, plant and equipment, net.....................  439,565     365,765
Other assets...........................................  120,972     108,460
                                                        --------    --------
      Total assets..................................... $831,200    $685,451
                                                        ========    ========
LIABILITIES AND STOCKHOLDER'S EQUITY (DEFICIENCY IN
 ASSETS)
Current liabilities:
  Accounts payable..................................... $ 70,372    $ 66,562
  Accrued liabilities..................................   63,603      55,740
  Current portion of long-term debt....................   22,015      11,625
                                                        --------    --------
    Total current liabilities..........................  155,990     133,927
Long-term debt.........................................  709,312     619,875
Deferred income taxes..................................   50,433      47,478
Deferred credits and other liabilities.................   89,643      68,473
Common stock held by ESOP..............................    7,688       6,500
Less: unearned compensation............................   (6,620)     (6,500)
Commitments and contingencies
Stockholder's equity (deficiency in assets):
  Common stock, $.01 par value.........................       --          --
  Additional paid-in capital........................... (146,538)   (165,352)
  Retained earnings (deficit)..........................   (7,647)        174
  Accumulated translation adjustment...................  (21,061)    (19,124)
                                                        --------    --------
    Total stockholder's equity (deficiency in assets).. (175,246)   (184,302)
                                                        --------    --------
      Total liabilities and stockholder's equity
       (deficiency in assets).......................... $831,200    $685,451
                                                        ========    ========
</TABLE>
 
   The accompanying notes are an integral part of the condensed consolidated
                             financial statements.
 
                                       7
<PAGE>
 
                            STERLING CHEMICALS, INC.
 
                 CONDENSED CONSOLIDATED STATEMENT OF OPERATIONS
                                 (IN THOUSANDS)
                                  (UNAUDITED)
 
<TABLE>
<CAPTION>
                                                        THREE MONTHS SIX MONTHS
                                                           ENDED       ENDED
                                                         MARCH 31,   MARCH 31,
                                                          1997(1)       1997
                                                        ------------ ----------
<S>                                                     <C>          <C>
Revenues...............................................   $239,763    $426,689
Cost of goods sold.....................................    222,936     394,779
                                                          --------    --------
Gross profit...........................................     16,827      31,910

Selling, general and administrative expenses...........      7,012      12,783
Interest and debt related expenses.....................     17,011      31,812
Interest income from parent............................         --      (1,788)
                                                          --------    --------
Loss before income taxes...............................     (7,196)    (10,897)

Benefit for income taxes...............................     (2,553)     (3,076)
                                                          --------    --------

Net Loss...............................................   $ (4,643)   $ (7,821)
                                                          ========    ========
</TABLE>
- --------
(1) See Note 1 of Notes to Condensed Consolidated Financial Statements for a
    discussion of merger activities and related financing. Prior to August 21,
    1996, Chemicals had no operating activities other than those related to
    merger activities.
 
 
   The accompanying notes are an integral part of the condensed consolidated
                             financial statements.
 
                                       8
<PAGE>
 
                            STERLING CHEMICALS, INC.
 
                 CONDENSED CONSOLIDATED STATEMENT OF CASH FLOWS
                                 (IN THOUSANDS)
                                  (UNAUDITED)
 
<TABLE>
<CAPTION>
                                                                      SIX MONTHS
                                                                        ENDED
                                                                      MARCH 31,
                                                                         1997
                                                                      ----------
<S>                                                                   <C>
Cash flows from operating activities:
  Cash received from customers.......................................  $441,473
  Miscellaneous cash receipts........................................     9,412
  Cash paid to suppliers and employees...............................  (415,150)
  Interest paid......................................................   (28,579)
  Interest received..................................................       261
  Income taxes paid..................................................     1,433
                                                                       --------
Net cash provided by operating activities............................     8,850
                                                                       --------
Cash flows from investing activities:
  Capital expenditures...............................................   (25,154)
  Purchase of assets-fibers business.................................   (88,200)
  Proceeds from sale of assets.......................................        16
                                                                       --------
Net cash used in investing activities................................  (113,338)
Cash flows from financing activities:
  Proceeds from long-term debt.......................................   146,900
  Repayment of long-term debt........................................   (50,072)
  Intercompany financing.............................................     3,000
  Contributions from parent..........................................     8,604
  Other..............................................................    (3,168)
                                                                       --------
Net cash used in financing activities................................   105,264
                                                                       --------
Effect of exchange rate on cash......................................       (77)
                                                                       --------
Net change in cash and cash equivalents..............................       699
Cash and cash equivalents--beginning of period.......................     5,581
                                                                       --------
Cash and cash equivalents--end of period.............................  $  6,280
                                                                       ========
</TABLE>
 
 
   The accompanying notes are an integral part of the condensed consolidated
                             financial statements.
 
                                       9
<PAGE>
 
                            STERLING CHEMICALS, INC.
 
           CONDENSED CONSOLIDATED STATEMENT OF CASH FLOWS, CONTINUED
                                 (IN THOUSANDS)
                                  (UNAUDITED)
 
                       RECONCILIATION OF NET LOSS TO CASH
                        PROVIDED BY OPERATING ACTIVITIES
 
<TABLE>
<CAPTION>
                                                                    SIX MONTHS
                                                                      ENDED
                                                                    MARCH 31,
                                                                     1997(1)
                                                                    ----------
<S>                                                                 <C>
Net loss...........................................................  $(7,821)
Adjustments to reconcile net income (loss) to net cash provided by
 operating activities:
  Depreciation and amortization....................................   25,002
  Loss on disposal of assets.......................................        7
  Deferred tax expense.............................................    5,787
  Unearned compensation............................................    1,067
Change in:
  Accounts receivable..............................................  (34,753)
  Inventories......................................................    1,201
  Prepaid expenses.................................................   (4,234)
  Other assets.....................................................   (7,844)
  Accounts payable.................................................    7,361
  Accrued liabilities..............................................    7,063
  Interest payable.................................................    8,570
  Taxes payable....................................................   (3,076)
  Other liabilities................................................   10,520
                                                                     -------
Net cash provided by operating activities..........................  $ 8,850
                                                                     =======
</TABLE>
- --------
(1) See Note 1 of Notes to Condensed Consolidated Financial Statements for a
    discussion of merger activities and related financing. Prior to August 21,
    1996, Chemicals had no operating activities other than those related to
    merger activities.
 
 
   The accompanying notes are an integral part of the condensed consolidated
                             financial statements.
 
                                       10
<PAGE>
 
                       STERLING CHEMICALS HOLDINGS, INC.
                           STERLING CHEMICALS, INC.
 
             NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS
                                  (UNAUDITED)
                                (IN THOUSANDS)
 
1. MERGER ACTIVITIES
 
  Sterling Chemicals, Inc. (prior to the Merger, "Sterling") and STX
Acquisition Corp. ("STX Acquisition"), a Delaware corporation formed in April
1996 by an investor group led by The Sterling Group, Inc. ("TSG") and The
Unicorn Group L.L.C. ("Unicorn"), entered into an Amended and Restated
Agreement and Plan of Merger dated April 24, 1996 (the "Merger Agreement"). On
August 20, 1996, the Merger Agreement was approved by a majority of the shares
outstanding, and on August 21, 1996, STX Acquisition merged with and into
Sterling, changing its name to Sterling Chemicals Holdings, Inc. ("Holdings"),
and continuing as the surviving corporation (the "Merger"). In connection with
the Merger, Holdings transferred all of its operating assets and liabilities
excluding its 13 1/2% Senior Secured Discount Notes Due 2008 (the "13 1/2%
Notes") to a wholly owned subsidiary, STX Chemicals Corp., which at the time
of the Merger changed its name to Sterling Chemicals, Inc. (after the Merger,
"Chemicals"). Holdings has no direct subsidiaries other than Chemicals. As
used herein, the term "Company" refers to Sterling and its subsidiaries prior
to the consummation of the Merger and, following the Merger, to Holdings and
its subsidiaries, including Chemicals.
 
  Each share of Sterling's common stock outstanding immediately prior to the
Merger was converted (at the election of the holder thereof) into either
$12.00 cash or the right to retain such shares ("Rollover Shares"), with the
aggregate number of Rollover Shares limited to 5.0 million. As a result of the
Merger, on August 21, 1996, the former STX Acquisition stockholders held
approximately 5.3 million shares (49%), stockholders with Rollover Shares held
approximately 5.0 million shares (46%), and the Company's newly formed
Employee Stock Ownership Plan (the "ESOP") held approximately 542,000 shares
(5%) of the outstanding shares of Holdings' common stock, par value $0.01 per
share ("Holdings Common Stock").
 
  The Merger was financed by the proceeds of bank term loans of $356.5
million, including an ESOP term loan of $6.5 million, amounts drawn against a
revolving credit facility of $6.4 million each pursuant to a new credit
agreement (the " Original Credit Agreement"), an offering by Chemicals of
$275.0 million of Chemicals' 11 3/4% Senior Subordinated Notes Due 2006 (the
"11 3/4% Notes"), an offering of $191.8 million (initial proceeds of $100
million) representing 191,751 Units, with each unit consisting of one 13 1/2%
Note and one Warrant to purchase three shares of Holdings Common Stock for
$0.01 per share beginning in August 1997, equity raised by STX Acquisition of
approximately $70.7 million, and cash on hand of $10.3 million. These proceeds
were used to redeem Sterling's common stock other than Rollover Shares ($608.3
million), purchase other equity interests (primarily stock appreciation rights
("SARs")) ($14.6 million), repay debt outstanding prior to the Merger ($142.7
million), loan monies to the new ESOP ($6.5 million), and pay fees and
expenses ($46.8 million).
 
  The Company has accounted for the Merger and related financing (collectively
the "1996 Recapitalization") as a series of debt and equity transactions
representing a recapitalization. Accordingly, the historical basis of the
Company's assets and liabilities have not been impacted by the 1996
Recapitalization.
 
2. BASIS OF PRESENTATION:
 
  In the opinion of management, the accompanying unaudited condensed
consolidated financial statements reflect all adjustments necessary to present
fairly the consolidated financial position of the Company and Chemicals as of
March 31, 1997 and their consolidated results of operations and cash flows for
the applicable three-month and six-month periods ended March 31, 1997 and
1996. All such adjustments are of a normal and recurring nature. The results
of operations for the periods presented are not necessarily indicative of the
results
 
                                      11
<PAGE>
 
to be expected for the full year. The accompanying unaudited condensed
consolidated financial statements should be, and are assumed to have been,
read in conjunction with the consolidated financial statements and notes
included in Holdings' and Chemicals' combined Annual Report on Form 10-K for
the fiscal year ended September 30, 1996 (the "Annual Report"). The condensed
consolidated balance sheets as of September 30, 1996 included herein have been
derived from the audited consolidated balance sheets as of September 30, 1996
included in the Annual Report. The condensed consolidated financial statements
as of and for the three-month and six-month periods ended March 31, 1997
included herein have been subjected to a review by Deloitte & Touche LLP, the
Company's independent public accountants, whose reports are included herein.
 
  Certain amounts reported in the financial statements for the prior periods
have been reclassified to conform with the current financial statement
presentation with no effect on net income or stockholders' equity.
 
3. INVENTORIES:
 
<TABLE>
<CAPTION>
                                                         MARCH 31, SEPTEMBER 30,
                                                           1997        1996
                                                         --------- -------------
<S>                                                      <C>       <C>
Inventories consisted of the following:
Finished products.......................................  $47,163     $31,868
Raw materials...........................................   13,189       9,499
Inventories under exchange agreements...................   (2,965)        722
Stores and supplies.....................................   18,432      11,631
                                                          -------     -------
                                                          $75,819     $53,720
                                                          =======     =======
</TABLE>
 
4. LONG-TERM DEBT:
 
<TABLE>
<CAPTION>
                                                          MARCH    SEPTEMBER 30,
                                                         31, 1997      1996
                                                         --------  -------------
<S>                                                      <C>       <C>
Long-term debt consisted of the following:
Revolving credit facilities............................. $ 21,640    $     --
Term Loans..............................................  426,000     350,000
ESOP term loan..........................................    5,688       6,500
11 3/4% Notes...........................................  275,000     275,000
13 1/2% Notes...........................................  102,263      94,757
                                                         --------    --------
  Total debt outstanding................................  830,591     726,257
Less:
  Current maturities....................................  (22,015)    (11,625)
                                                         --------    --------
Total long-term debt.................................... $808,576    $714,632
                                                         ========    ========
</TABLE>
 
  As part of the 1996 Recapitalization, Chemicals entered into the Original
Credit Agreement with Texas Commerce Bank National Association, as agent bank
for a syndicate of lenders, and Credit Suisse First Boston and Chase
Securities, Inc. as co-arrangers. Funding under the Original Credit Agreement
occurred August 21, 1996, upon the consummation of the Merger. The Original
Credit Agreement provides for facilities consisting of a six and one-half year
revolving credit facility providing for up to $100 million (subject to a
monthly borrowing base calculation) in revolving loans (the "Revolver"), a
term loan facility consisting of a six and one-half year $200 million Tranche
A term loan and an eight-year $150 million Tranche B term loan (the "Original
Term Loans"), and a four-year $6.5 million ESOP Term Loan (the "ESOP Loan").
 
  On January 31, 1997, the Company acquired (the "AFB Acquisition") the
acrylic fibers business (the "AFB") of Cytec Industries Inc. ("Cytec") (See
Note 7). In connection with the AFB Acquisition, Chemicals entered into a
credit agreement (the "New Credit Agreement" and together with the Original
Credit Agreement, the "Senior Credit Agreements") with Texas Commerce Bank
National Association, as agent bank for a
 
                                      12
<PAGE>
 
syndicate of lenders, and Credit Suisse First Boston and Chase Securities Inc.
as co-arrangers. Funding under the New Credit Agreement occurred January 31,
1997, upon consummation of the AFB Acquisition. The New Credit Agreement
provides for a term loan facility consisting of a $31 million Tranche A term
loan due March 31, 2003 and a $50 million Tranche B term loan due September
30, 2004 (the "New Term Loans" and together with the Original Term Loans, the
"Term Loans").
 
  The Term Loans, the ESOP Loan and the Revolver borrowings bear interest, at
Chemicals' option, at an annual rate of either the Eurodollar Rate or the Base
Rate plus an Applicable Margin ranging from 0% to 3% depending upon the
Company's Leverage Ratio (as defined in the Original Credit Agreement). The
"Base Rate" is equal to the greater of the Prime Rate as announced from time
to time by the agent bank, the "Federal Funds Effective Rate" plus 1/2% or the
"Base CD Rate" plus 1% (as such terms are defined in the Senior Credit
Agreements). The Original Credit Agreement also requires Chemicals to pay a
commitment fee in the amounts of 3/8% or 1/2% of the unused commitment under
the Revolver depending on the Company's Leverage Ratio.
 
  On April 7, 1997, Chemicals completed a private offering (the "11 1/4% Notes
Offering") of $150,000,000 of 11 1/4% Senior Subordinated Notes Due 2007 (the
"11 1/4% Notes"). The 11 1/4% Notes are unsecured senior subordinated
obligations of Chemicals, ranking subordinate in right of payment to all
existing and future senior debt of Chemicals, but pari passu with the 11 3/4%
Notes and all future senior subordinated indebtedness.
 
  The proceeds of the 11 1/4% Notes Offering were used to prepay outstanding
indebtedness under the Term Loans. In connection with such prepayments,
Chemicals and the requisite lenders under the Senior Credit Agreements
effected amendments to the Senior Credit Agreements ("the Amendments"). Among
other things, the Amendments (i) permitted and provided for the issuance of
the 11 1/4% Notes, (ii) adjusted the method of the application of voluntary
prepayments to allow the proceeds of the 11 1/4% Notes Offering to be applied
in a manner that significantly reduced required principal payments,
particularly over the next three years, (iii) amended certain financial
covenants to make them somewhat less restrictive, including amendments to
ratios specified in the Amendments, (iv) increased the commitment under the
Revolver by $25 million to $125 million and (v) included a new financial
covenant with respect to the maintenance of a specified Senior Debt Leverage
Ratio.
 
5. COMMITMENTS AND CONTINGENCIES:
 
Product Contracts
 
  The Company has certain long-term agreements that provide for the dedication
of 100% of the Company's production of acetic acid, plasticizers, tertiary
butylamine, and sodium cyanide, each to one customer. The Company also has
various sales and conversion agreements that dedicate significant portions of
the Company's production of styrene monomer, acrylonitrile, and methanol, the
Company's major petrochemical products, to various customers. These agreements
generally provide for cost recovery plus an agreed margin or element of profit
based upon market price.
 
Environmental Regulations
 
  The Company's operations involve the handling, production, transportation
and disposal of materials classified as hazardous or toxic and are extensively
regulated under environmental and health and safety laws. Operating permits
which are required for the Company's operations are subject to periodic
renewal and may be revoked or modified for cause. New laws or permit
requirements and conditions may affect the Company's operations, products, or
waste disposal. Past or future operations may result in claims or liabilities.
Expenditures could be required to upgrade waste water collection,
pretreatment, or disposal systems or for other matters related to production,
transportation and disposal of materials classified as hazardous or toxic.
 
                                      13
<PAGE>
 
Legal Proceedings
 
  Ammonia Release Lawsuits. A description of the ammonia release lawsuit is
found under "Legal Proceedings" in Note 7 of the "Notes To Consolidated
Financial Statements" of the Annual Report and is incorporated herein by
reference. As discussed therein, approximately 2,600 of the plaintiffs agreed
to submit their damage claims to binding arbitration. Each of the plaintiffs
who agreed to participate in the arbitration waived any right of recovery for
punitive or exemplary damages. Pursuant to the agreement to arbitrate, a two-
week evidentiary proceeding was conducted in July 1996 before a three-judge
panel to determine the amount of damages. On May 1, 1997, the three-judge
panel awarded the plaintiffs an amount of damages which was well within the
limits of the Company's insurance coverages and will not have a material
adverse impact on the financial position, results of operations, or cash flows
of the Company.
 
  The Company continues to vigorously defend against the claims of the
plaintiffs who did not participate in the July 1996 arbitration.
 
  Other Lawsuits. The Company is subject to various other claims and legal
actions that arise in the ordinary course of its business.
 
Litigation Contingency
 
  In accordance with Statement of Financial Accounting Standards No. 5,
"Accounting for Contingencies," and Financial Accounting Standards Board
Interpretation No. 39, "Offsetting of Amounts Related to Certain Contracts,"
the Company has made estimates of the reasonably possible range of its
liability with regard to outstanding litigation for which it may incur
liability. In addition, liabilities have been accrued based on the estimated
probable loss from such litigation. These estimates are based on management's
judgments using currently available information as well as consultation with
the Company's insurance carriers and outside legal counsel. A number of the
claims in these litigation matters are covered by the Company's insurance
policies. The Company therefore has also made estimates of its probable
recoveries under these insurance policies based on its understanding of these
policies, discussions with its insurers and consultation with outside legal
counsel, in addition to management's judgments. Based on the foregoing, as of
March 31, 1997, the Company has accrued approximately $21.3 million as its
estimate of aggregate contingent liability for these matters, and has also
recorded aggregate receivables from its insurers of approximately $20.6
million. At March 31, 1997, management estimates that the aggregate reasonably
possible range of loss for all litigation combined, in addition to the amount
accrued, is from $0 to $20 million. The Company believes that this additional
reasonably possible loss is substantially covered by insurance.
 
  While the Company has based its estimates on its evaluation of available
information to date and the other matters described above, much of the
litigation is in its early stages and it is impossible to predict with
certainty the ultimate outcome. The Company will adjust its estimates as
necessary as additional information is developed and evaluated. However, the
Company believes that the final resolution of these contingencies will not
have a material adverse impact on the financial position, results of
operations, or cash flows of the Company. The timing of probable insurance
recoveries, and additional accruals or payment of liabilities, if any, are not
expected to have a material adverse effect on the financial position, results
of operations, or cash flows of the Company.
 
6. NEW ACCOUNTING STANDARDS:
 
  The Financial Accounting Standards Board has issued Statement of Financial
Accounting Standards ("SFAS") No. 121, "Accounting for the Impairment of Long-
Lived Assets and for Long-Lived Assets to Be Disposed Of." This statement
establishes new accounting standards for measuring the impairment of long-
lived assets. The Company adopted this Statement in the first quarter of
fiscal 1997. The adoption of this Statement did not have a material adverse
effect on the Company's financial position, results of operations, or cash
flows.
 
 
                                      14
<PAGE>
 
  The Financial Accounting Standards Board issued SFAS No. 123, "Accounting
for Stock-Based Compensation" in October 1995. Under SFAS No. 123, companies
are permitted to either adopt this new standard and record expenses for stock
options and other stock-based employee compensation plans based on their fair
value at date of grant, or continue to apply its current accounting policy
under Accounting Principles Board ("APB") Opinion No. 25 and increase its
footnote disclosure. In the first quarter of fiscal 1997, the Company elected
to continue to apply APB Opinion No. 25, and will increase its footnote
disclosure to include the pro forma impact on net income and earnings per
share of the application of the fair value based method of accounting.
 
  The Financial Accounting Standards Board issued SFAS No. 128, "Earnings Per
Share," in February 1997. SFAS No. 128, which is effective for periods ending
after December 15, 1997, establishes standards for computing and presenting
earnings per share ("EPS"). SFAS No. 128 replaces the presentation of primary
EPS previously prescribed by APB No. 15 with a presentation of basic EPS,
which is computed by dividing income available to common stockholders by the
weighted average number of common shares outstanding for the period. The
statement also requires dual presentation of basic and diluted EPS. Diluted
EPS is computed similarly to fully diluted EPS pursuant to APB No. 15. Pro
forma basic and diluted EPS for all historical periods presented, assuming
that SFAS No. 128 was effective at the beginning of each such historical
period, would not be materially different from what has been presented using
APB No. 15.
 
7. BUSINESS ACQUISITIONS:
 
  On January 31, 1997, the Company acquired the AFB from Cytec. The AFB, now
owned by two wholly owned subsidiaries of the Company (collectively "Sterling
Fibers"), recorded sales of approximately $139 million in calendar year 1996
and consists of an acrylic fibers plant located near Pensacola, Florida and
several associated marketing and research offices. Sterling Fibers is one of
two acrylic fibers manufacturers in the United States. Cytec will supply
acrylonitrile to Sterling Fibers through the continuation of a five-year
supply agreement ending in 2002. The acquisition was financed through the
incurrence of $81 million of term debt under the New Credit Agreement with
substantially the same lenders as those under the Original Credit Agreement,
the issuance of $10 million (liquidation value) of Series A "pay in kind"
mandatory redeemable preferred stock ("Series A Preferred") to Cytec, and the
sale of $10 million of Holdings Common Stock in a private placement. The
Company used the purchase method to account for the acquisition, and operating
results of Sterling Fibers beginning February 1, 1997 are included with those
of the Company.
 
  The following table presents the unaudited pro forma results of operations
of the Company as if the AFB Acquisition had occurred on October 1, 1995. The
pro forma results have been prepared for comparative purposes only and do not
purport to be indicative of what would have occurred had the AFB Acquisition
been made at the beginning of fiscal year 1996 or of results which may occur
in the future.
 
<TABLE>
<CAPTION>
                                                           PRO FORMA  PRO FORMA
                                                           SIX MONTHS SIX MONTHS
                                                             ENDED      ENDED
                                                           MARCH 31,  MARCH 31,
                                                              1997       1996
                                                           ---------- ----------
                                                            IN THOUSANDS EXCEPT
                                                             PER SHARE AMOUNTS
<S>                                                        <C>        <C>
Revenues..................................................  $471,159   $446,121
Net Income (loss) attributable to common stockholders.....   (16,662)    20,680
Net income (loss) per common share........................  $  (1.46)  $   0.37
Weighted average shares...................................    11,381     56,515
</TABLE>
 
                                      15
<PAGE>
 
8. EMPLOYEE BENEFITS:
 
Omnibus Stock Awards and Incentive Plan
 
  In April 1997, the Board of Directors, upon recommendation of the
Compensation Committee, but subject to shareholder approval at the next
stockholders meeting, approved the establishment of the Omnibus Stock Awards
and Incentive Plan (the "Omnibus Plan"). Under the Omnibus Plan, the Company
may grant to key employees, incentive and nonqualified stock options, stock
appreciation rights, restricted stock awards, performance awards, and phantom
stock awards. The terms and amounts of the awards will be determined by the
Compensation Committee of the Board of Directors. One million shares of the
Company's stock are reserved for issuance under the Omnibus Plan. In the event
of a change of control of the Company or an initial public offering of
Holdings Common Stock, all awards will immediately vest and become
exercisable.
 
Nonqualified Stock Option Plan for Non-Employee Directors
 
  Also in April 1997, the Board of Directors, upon recommendation of the
Compensation Committee, approved the establishment of the Nonqualified Stock
Option Plan for Non-Employee Directors (the "Nonqualified Plan"). Each non-
employee director of the Company will participate in the Nonqualified Plan.
Each eligible director on the date of adoption of the Nonqualified Plan will
be granted an option to acquire 2,000 shares of Holdings Common Stock (4,000
shares for the Vice-Chairman), and each eligible director who is serving on
the Board of Directors on each subsequent October 1st will automatically be
granted an option to acquire 1,000 shares of Holdings Common Stock (2,000
shares for the Vice-Chairman). All options will expire ten years from date of
grant. All options will be granted at the fair market value on the date of
grant. A total of 160,000 shares of Holdings Common Stock are reserved for
issuance under the Nonqualified Plan.
 
Profit Sharing and Bonus Plan
 
  In January 1997, the Board of Directors, upon recommendation of the
Compensation Committee, approved the establishment of a Profit Sharing Plan
that is designed to benefit all qualified employees, and a Bonus Plan that is
expected to provide for bonuses to certain key employees based on the
Company's annual financial performance.
 
9. WEIGHTED AVERAGE SHARES(1):
 
  The weighted average shares outstanding used in the calculation of earnings
per share is calculated below:
 
<TABLE>
<S>                                                     <C>       
Total Shares outstanding as of 3/31/97................. 11,967,000
Unallocated shares held by ESOP........................    557,000
Total shares outstanding
 Less: unallocated shares held by ESOP at 3/31/97...... 11,410,000
                                                        ----------
<CAPTION>
                                                          THREE        SIX
              WEIGHTED AVERAGE EFFECT OF:                 MONTHS      MONTHS
              ---------------------------               ----------  ----------
<S>                                                     <C>         <C>
44,000 shares acquired by ESOP.........................         --          21
7,000 treasury shares acquired.........................          6           3
84,000 allocated shares held by ESOP...................        (38)        (53)
778,000 newly issued shares............................       (260)       (521)
Weighted average shares outstanding for the three and
 six-month periods ended March 31, 1997................ 11,118,000  10,860,000
</TABLE>
- --------
(1) Weighted average shares outstanding excludes warrants equal to 575,000
    shares which were antidilutive for the three and six-month period ending
    March 31, 1997.
 
 
                                      16
<PAGE>
 
                    REPORT OF INDEPENDENT PUBLIC ACCOUNTANTS
 
To the Board of Directors and Stockholders
of Sterling Chemicals Holdings, Inc.
 
  We have reviewed the accompanying condensed consolidated balance sheet of
Sterling Chemicals Holdings, Inc. and subsidiaries (the "Company") as of March
31, 1997, and the related condensed consolidated statements of operations and
cash flows for the three-month and six-month periods then ended. These
financial statements are the responsibility of the Company's management.
 
  We conducted our review in accordance with standards established by the
American Institute of Certified Public Accountants. A review of interim
financial information consists principally of applying analytical procedures to
financial data and making inquiries of persons responsible for financial and
accounting matters. It is substantially less in scope than an audit conducted
in accordance with generally accepted auditing standards, the objective of
which is the expression of an opinion regarding the financial statements taken
as a whole. Accordingly, we do not express such an opinion.
 
  Based on our review, we are not aware of any material modifications that
should be made to the condensed consolidated financial statements referred to
above for them to be in conformity with generally accepted accounting
principles.
 
  We have previously audited, in accordance with generally accepted auditing
standards, the consolidated balance sheet of the Company as of September 30,
1996, and the related consolidated statements of operations, stockholders'
equity, and cash flows for the year then ended (not presented herein); and in
our report dated December 6, 1996, we expressed an unqualified opinion on those
consolidated financial statements. In our opinion, the information set forth in
the accompanying condensed consolidated balance sheet as of September 30, 1996
is fairly stated in all material respects, in relation to the consolidated
balance sheet from which it has been derived.
 
DELOITTE & TOUCHE LLP
 
Houston, Texas
May 13, 1997
 
                                       17
<PAGE>
 
                    REPORT OF INDEPENDENT PUBLIC ACCOUNTANTS
 
To the Stockholder of Sterling Chemicals, Inc.
 
  We have reviewed the accompanying condensed consolidated balance sheet of
Sterling Chemicals, Inc. and subsidiaries ("Chemicals") as of March 31, 1997,
and the related condensed consolidated statements of operations and cash flows
for the three-month and six-month periods then ended. These financial
statements are the responsibility of Chemicals' management.
 
  We conducted our review in accordance with standards established by the
American Institute of Certified Public Accountants. A review of interim
financial information consists principally of applying analytical procedures to
financial data and making inquiries of persons responsible for financial and
accounting matters. It is substantially less in scope than an audit conducted
in accordance with generally accepted auditing standards, the objective of
which is the expression of an opinion regarding the financial statements taken
as a whole. Accordingly, we do not express such an opinion.
 
  Based on our review, we are not aware of any material modifications that
should be made to the condensed consolidated financial statements referred to
above for them to be in conformity with generally accepted accounting
principles.
 
  We have previously audited, in accordance with generally accepted auditing
standards, the consolidated balance sheet of Chemicals as of September 30,
1996, and the related consolidated statement of operations, stockholder's
equity, and cash flows for the year then ended (not presented herein); and in
our report dated December 6, 1996, we expressed an unqualified opinion on those
consolidated financial statements. In our opinion, the information set forth in
the accompanying condensed consolidated balance sheet as of September 30, 1996
is fairly stated in all material respects, in relation to the consolidated
balance sheet from which it has been derived.
 
DELOITTE & TOUCHE LLP
 
Houston, Texas
May 13, 1997
 
                                       18
<PAGE>
 
ITEM 2. MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND
        RESULTS OF OPERATIONS
 
Certain capitalized terms used herein have the meanings assigned to them in
the Notes To Condensed Consolidated Financial Statements.
 
OVERVIEW
 
  Holdings is a holding company whose only material asset is its investment in
Chemicals. Holdings' only material liability is its obligation to repay the 13
1/2% Notes issued in connection with the Merger. Chemicals and its
subsidiaries own substantially all of the consolidated operating assets and
are obligated for substantially all liabilities of the Company other than the
13 1/2% Notes. The Merger that occurred on August 21, 1996 and related
financings were accounted for as a recapitalization, with no change in the
basis of the assets and liabilities of Chemicals. Other than the additional
interest expense associated with the 13 1/2% Notes and the preferred stock
dividend associated with the Series A Preferred issued to Cytec, the results
of operations for the Company are essentially the same as those for Chemicals.
Accordingly, the discussion that follows is applicable to both entities,
except as specifically noted. A separate discussion of the results of
operations for Chemicals for the three-month and six-month periods ended March
31, 1997 would not, in the opinion of the Company, provide any additional
meaningful information.
 
RECENT DEVELOPMENTS
 
  On April 7, 1997, Chemicals completed its private offering of $150,000,000
of 11 1/4% Notes. The 11 1/4% Notes are unsecured senior subordinated
obligations of Chemicals, ranking subordinate in right of payment to all
existing and future senior debt of Chemicals, but pari passu with the 11 3/4%
Notes and all future senior subordinated indebtedness.
 
  The proceeds of the 11 1/4% Notes Offering were used to prepay outstanding
indebtedness under the Term Loans. In connection with such prepayments,
Chemicals and the requisite lenders under the Senior Credit Agreements
effected the Amendments. Among other things, the Amendments (i) permitted and
provided for the issuance of the 11 1/4% Notes, (ii) adjusted the method of
the application of voluntary prepayments to allow the proceeds of the 11 1/4%
Notes Offering to be applied in a manner that significantly reduced required
principal payments, particularly over the next three years, (iii) amended
certain financial covenants to make them somewhat less restrictive, including
amendments to specific ratios specified in the Amendments, (iv) increased the
commitment under the Revolver by $25 million to $125 million, and (v) included
a new financial covenant with respect to the maintenance of a specified Senior
Debt Leverage Ratio (as defined in the Amendments).
 
  On January 31, 1997, the Company acquired the AFB from Cytec. The AFB, now
owned and operated by Sterling Fibers, recorded sales of approximately $139
million in calendar year 1996 and consists of an acrylic fibers plant located
near Pensacola, Florida and several associated marketing and research offices.
Sterling Fibers is one of two acrylic fibers manufacturers in the United
States. Cytec will supply acrylonitrile to Sterling Fibers through the
continuation of a five-year supply agreement ending in 2002. The total
consideration paid for the acquisition was $101 million, which was financed
through the incurrence of $81 million of New Term Loans, the issuance to Cytec
of 100,000 shares of Series A Preferred with an aggregate $10 million
liquidation value, and the sale of 833,334 shares of Holdings Common Stock for
a total of $10 million. The Company used the purchase method of accounting to
account for the acquisition, and operating results of Sterling Fibers
beginning February 1, 1997 are included with those of the Company.
 
RESULTS OF OPERATIONS
 
  Consolidated revenues increased for the three and six month periods ending
March 31, 1997 compared to the same period in fiscal 1996. The primary reasons
for these increased revenues were increased volumes for
 
                                      19
<PAGE>
 
sodium chlorate, due in part to the startup of the Company's new sodium
chlorate plant in Valdosta, Georgia, revenues from the Company's new methanol
unit at the Texas City, Texas plant, two months of operations from the
recently acquired AFB and increased sales volumes of acrylonitrile.
Consolidated net income (loss) was lower due to lower petrochemical margins
(primarily styrene), along with an increase of interest expense to $20.9
million and $39.5 million for the three and six month periods of 1997,
respectively, compared to $1.6 million and $3.2 million for the same periods
last year.
 
  Revenues for the second quarter of fiscal 1997 were approximately $240
million compared to revenues of approximately $191 million for the second
quarter of fiscal 1996, an increase of nearly 26%. A net loss of $7.8 million
or $0.72 per share was recorded for the second quarter of fiscal 1997 compared
to net income of $6.4 million or $0.12 per share for the second quarter of
fiscal 1996.
 
  Revenues for the first six months of fiscal 1997 were approximately $427
million compared to revenues of approximately $382 million for the first six
months of fiscal 1996, an increase of nearly 12%. A net loss of $15.0 million
or $1.40 per share was recorded for the first six months of fiscal 1997
compared to net income of $19.2 million or $0.35 per share for the first six
months of fiscal 1996.
 
Petrochemicals
 
  The new methanol unit and higher acrylonitrile sales volumes were
principally responsible for the revenue increase in the three-month period of
1997 compared to 1996. Methanol was also a significant contributor to the
increased six-month revenues. The Company's petrochemical business recorded
operating losses of $4.1 million and $6.6 million, respectively, for the three
and six month periods of 1997 compared to earnings of $4.0 million and $14.7
million, respectively, for the same periods of fiscal 1996. The decrease in
operating earnings for the second quarter was primarily due to significantly
lower styrene margins, and the decrease in the six month period was primarily
due to both significantly lower styrene margins and lower acrylonitrile
margins.
 
  Styrene. Styrene revenues increased nearly 1% to approximately $89 million
in the second quarter of fiscal 1997 and approximately 2% to about $165
million for the first six months of fiscal 1997 compared to the same periods
in fiscal 1996. Styrene sales prices decreased moderately from the same fiscal
1996 periods because of weaker market conditions, particularly in the export
market. Average sales prices for both the second quarter and first six months
of fiscal 1997 decreased by approximately 1% from the same periods a year ago.
Sales volumes for both the three-month and six-month periods showed only
marginal changes when compared to the same period last year.
 
  The prices of styrene's major raw materials, benzene and ethylene, were
substantially higher during the second quarter and first six months of fiscal
1997 compared to the same periods in fiscal 1996. Benzene prices were
approximately 21% and 26% higher, and ethylene prices were approximately 41%
and 30% higher, for the respective 1997 periods compared to 1996. These price
escalations contributed significantly to the decline in styrene margins as
market conditions did not allow for sufficient styrene price increases to
compensate for these rising costs.
 
  Acrylonitrile. Acrylonitrile revenues for the three month period ended March
31, 1997 increased approximately 40% to $42 million compared to the
corresponding period in fiscal 1996. This increase was partly due to a 53%
rise in sales volumes for the period, and partly due to the fact that the
acrylonitrile unit was shut down for most of March 1996 for scheduled
maintenance and the upgrade of its distributive control system. Acrylonitrile
revenue for the first six months of fiscal 1997, however, decreased by nearly
10%, the result of a 20% decrease in the average acrylonitrile sales price
realized by the Company. Sales volumes for the six month period showed a 12%
increase when compared to the same period last year.
 
 
                                      20
<PAGE>
 
  The prices of acrylonitrile's major raw materials, propylene and ammonia,
were approximately 36% and 11% higher, respectively, in the second fiscal
quarter and approximately 20% and 17% higher, respectively, for the first six
months of fiscal 1997 than in the corresponding periods in fiscal 1996. These
increases contributed to the decline in acrylonitrile margins.
 
  Methanol. In August 1996, the Company completed construction of its methanol
unit at its Texas City, Texas plant as part of its capital program. During the
demonstration period, problems in the unit's reformer burners developed. The
burners were replaced during a three week shutdown in October 1996 and the
methanol unit resumed production at projected capacities in late October 1996.
 
  Methanol revenues in the second fiscal quarter of 1997 were negatively
impacted by a two week shutdown for compressor repairs. Methanol revenues for
the period was $17.6 million, bringing the total revenues for the first six
months of fiscal 1997 to approximately $32 million. Sales volumes for the
three and six month periods of fiscal 1997 were approximately 34 million and
64 million gallons, respectively. Margins improved significantly late in the
second quarter as the price of natural gas (the primary raw material for
methanol) declined significantly from January and February levels without a
corresponding drop in the price of methanol. The methanol unit was under
construction during the corresponding periods of 1996.
 
  Other Petrochemical Products. Revenues from the Company's other
petrochemical products (including acetic acid, plasticizers, tertiary
butylamine, and sodium cyanide) in the second quarter of fiscal 1997 were
approximately $26 million, a decrease of about 20% when compared to the same
period last year. Revenues for the six-month period ended March 31, 1997 were
down approximately 22% to about $54 million when compared to the same 1996
period. The decrease in revenues reflects a reduction in sodium cyanide
revenues resulting from lower demand, and a decline in acetic acid revenues
resulting from a procedural change in the billings to BP Chemicals Inc.
("BP"). Methanol used in the production of acetic acid was billed to BP as
part of the total cost of production prior to the startup of the Company's
methanol unit and included in acetic acid revenues. These methanol sales are
now being billed separately.
 
Pulp Chemicals
 
  Revenues from the Company's pulp chemical business increased 12% to $42
million and 11% to $85 million for the second quarter and first six months of
fiscal 1997, respectively, when compared to the same periods last year. The
increase in revenues was primarily due to an increase in sales volumes of
sodium chlorate of approximately 19% and 9%, respectively, when compared to
the corresponding three and six month periods of 1996. The increase in sales
volumes in the second quarter was aided by the startup of the new sodium
chlorate facility in Valdosta, Georgia in December 1996. Average sales prices
for sodium chlorate declined approximately 5% in the second quarter of fiscal
1997 compared to the corresponding period in 1996. Average sodium chlorate
sales prices for the first six months of 1997 were approximately the same as
the corresponding period in 1996. Royalty revenues from installed generator
technology increased 8% in the second fiscal quarter and 4% in the first six
months of fiscal 1997 compared to the corresponding periods of 1996. Operating
earnings for the pulp chemicals business were $13.3 million for the second
quarter of fiscal 1997 compared to $7.1 million during the corresponding
period of 1996. Operating earnings for the pulp chemicals business were $24.4
million for the first six months of fiscal 1997 compared to $17.8 million for
the corresponding period in 1996. The increase for the three month and six
month periods was primarily due to increased sales volumes of sodium chlorate
and higher royalty revenues. In addition, the Company recorded $3.1 million of
expenses associated with stock appreciation rights for its pulp chemicals
employees during the corresponding six months of fiscal 1996.
 
Fibers
 
  For the two-month period from February 1, 1997 to March 31, 1997, Sterling
Fibers recorded revenues and operating earnings of $23.4 million and $0.8
million, respectively. Because the Company did not acquire the assets
constituting the AFB prior to January 31, 1997, there are no corresponding
results for prior periods.
 
 
                                      21
<PAGE>
 
Selling, General, and Administrative Expenses
 
  Selling, general, and administrative expenses for the first six months of
fiscal 1997 were approximately $13 million compared to approximately $16
million in the first six months of fiscal 1996. The improvement is due
primarily to a sales tax refund accrual of $1 million plus lower employee
profit sharing and other overheads totaling approximately $2 million.
 
Interest and Debt Related Expense
 
  Interest and debt related expenses for the three and six month periods
ending March 31, 1997 were $20.9 million and $39.5 million, respectively,
compared to $1.6 million and $3.2 million, respectively, for the corresponding
periods in 1996. This increase is primarily due to the additional debt
incurred in the 1996 Recapitalization and the AFB Acquisition.
 
LIQUIDITY AND CAPITAL RESOURCES
 
Debt Structure
 
  On August 21, 1996, the Company completed the 1996 Recapitalization,
significantly increasing the Company's leverage and cash requirements for debt
service related to the Original Credit Agreement, the 13 1/2% Notes and the 11
3/4% Notes.
 
  In connection with the AFB Acquisition, Chemicals entered into the New
Credit Agreement with Texas Commerce Bank National Association, as agent bank
for a syndicate of lenders, and Credit Suisse First Boston and Chase
Securities Inc. as co-arrangers. Funding under the New Credit Agreement
occurred January 31, 1997, upon consummation of the AFB Acquisition. The New
Credit Agreement provides for a term loan facility consisting of a $31 million
Tranche A term loan due March 31, 2003 and a $50 million Tranche B term loan
due September 30, 2004. At March 31, 1997, the Company's long-term debt
(including current maturities) was $831 million.
 
  On April 7, 1997, Chemicals completed the 11 1/4% Notes Offering. The 11
1/4% Notes are unsecured senior subordinated obligations of Chemicals, ranking
subordinate in right of payment to all existing and future senior debt of
Chemicals, but pari passu with the 11 3/4% Notes and all future senior
subordinated indebtedness.
 
  The Company's ability to obtain additional financing in the future for
working capital, capital expenditures, acquisitions and general corporate
purposes, should it need to do so, will be affected by the covenants in its
various debt agreements and by cash requirements for debt service. The Senior
Credit Agreements and the indentures governing the 11 1/4% Notes, the 11 3/4%
Notes and the 13 1/2% Notes (the "Indentures") contain numerous financial and
operational covenants, including, without limitation, restrictions on the
Company's ability to incur indebtedness, pay dividends, create liens, sell
assets, engage in mergers and acquisitions, and refinance existing
indebtedness, as well as the obligation of the Company to maintain certain
financial ratios. The 11 1/4% Notes Offering was permitted under the
Indentures as a Refinancing of Debt outstanding under the Senior Credit
Agreements. At the time of the AFB Acquisition, the Company negotiated an
amendment to the Original Credit Agreement to permit the AFB Acquisition and
to make certain financial covenants, including the Leverage Ratio covenant
applicable through the end of fiscal 1997, somewhat less restrictive. The
Amendments to the Senior Credit Agreements, which became effective upon
consummation of the 11 1/4% Notes Offering and the partial repayment of the
Term Loans with the proceeds thereof and were made retroactive to March 31,
1997, further made certain of the financial covenants therein less
restrictive, including the Leverage Ratio covenant, among other things. Such
modifications did not, however, lessen the restrictions under the Indentures
on the Company's ability to incur additional debt. The Company may, however,
consummate additional acquisitions under the Indentures if the pro forma
effect of such an acquisition has sufficient positive impact on certain
financial ratios. The Senior Credit Agreements also require that certain
amounts of Excess Cash Flow (as defined therein) be used to prepay amounts
outstanding under the Term Loans. The first such mandatory prepayment is not
required to be made until January 1998.
 
                                      22
<PAGE>
 
  The Company's ability to comply with the terms of its various debt
agreements (including its ability to comply with such covenants) and to meet
its debt service obligations will depend on its future performance. The
Company was in compliance with its financial covenants (as amended) in effect
as of March 31, 1997.
 
  The Company intends to meet its liquidity needs for operating activities and
capital expenditures (other than acquisitions) through internally generated
funds and, to the extent necessary, borrowings under the Revolver. As of March
31, 1997, Chemicals had drawn approximately $21.6 million under the Revolver
and issued approximately $1 million in letters of credit under the Revolver,
thereby reducing the available commitment under the Revolver at such time to
approximately $77.4 million (compared to an available commitment thereunder as
of December 31, 1996 of $96 million). As part of the Amendments, on April 7,
1997, the total commitment under the Revolver was increased by $25 million to
$125 million. The Company believes that such sources of funds will be
sufficient to permit the Company to meet its liquidity needs during fiscal
1997.
 
  The Senior Credit Agreements and the indentures for the 11 3/4% Notes and
the 11 1/4% Notes contain provisions which restrict the payment of advances,
loans, and dividends from Chemicals to Holdings. The most restrictive of those
covenants limit such payments during fiscal 1997 to approximately $1.6 million
plus any amounts due to Holdings from Chemicals under an intercompany tax
sharing agreement. Such restriction is not expected to limit Holdings' ability
to meet its obligations in fiscal 1997.
 
Working Capital
 
  Working capital of the Company was $109 million at March 31, 1997, up from
$77 million atSeptember 30, 1996. The addition of the AFB contributed
approximately $29 million to total working capital for the period and was the
primary contributor to the overall increase of $32 million.
 
Cash Flow
 
  Net cash provided by operations was $9.4 million during the first six months
of fiscal 1997 compared to $16.2 million for the corresponding period in
fiscal 1996. The decrease was primarily attributable to higher payments for
interest and lower operating earnings.
 
Capital Expenditures
 
  The Company's capital expenditures for the first six months of fiscal 1997
were $25.1 million compared to $49.0 million in the same period last year. The
capital expenditures in the first six months of fiscal 1997 were primarily
related to the construction of the Valdosta, Georgia sodium chlorate plant,
along with the distributive control system upgrade at the Company's
acrylonitrile unit. During the remainder of fiscal 1997, the Company expects
to make an additional $10 to 15 million of capital expenditures primarily for
process modernization in styrene and acrylonitrile and routine safety,
environmental, and replacement capital in the Company's petrochemical, pulp
chemical, and fibers businesses. The Company expects to fund its remaining
fiscal 1997 capital expenditures from operating cash flow, plus borrowings
under the Revolver, if needed.
 
LEGAL PROCEEDINGS
 
  The information under "Legal Proceedings" in the Notes to Condensed
Consolidated Financial Statements herein is hereby incorporated by reference.
 
                                      23
<PAGE>
 
PART II--OTHER INFORMATION
 
ITEM 2. CHANGES IN SECURITIES
 
  In connection with the acquisition of the AFB from Cytec on January 31,
1997, Holdings issued to Cytec 100,000 shares of Series A "pay in kind"
mandatory redeemable preferred stock with an aggregate liquidation value of
$10 million and sold 833,334 shares of Holdings Common Stock for a total of
$10 million. Of such shares of Holdings Common Stock, 1,698 were sold pursuant
to Regulation S to employees of the Company who are not residents of the
United States and the remaining shares were sold pursuant to a private
placement.
 
ITEM 4. SUBMISSION OF MATTERS TO A VOTE OF SECURITY HOLDERS
 
  The Company's Annual Meeting of Stockholders was held on January 22, 1997,
at which time the Company's nine nominees for directors were elected and the
appointment of Deloitte & Touche LLP as the independent auditors of the
financial statements of the Company for the fiscal year ended September 30,
1997 was ratified.
 
ITEM 6. EXHIBITS AND REPORTS ON FORM 8-K
 
  (a) Exhibits: The following exhibits are filed as part of this Form 10-Q.
 
<TABLE>
<CAPTION>
 EXHIBIT
 NUMBER                          DESCRIPTION OF EXHIBIT
 -------                         ----------------------
 <C>     <S>
   4.1   --Indenture among Sterling Chemicals, Inc. and Fleet National Bank,
          Trustee, dated as of April 1, 1997.
   4.2   --Registration Rights Agreement, dated as of April 1, 1997, among
          Sterling Chemicals, Inc., as issuer, and Credit Suisse First Boston
          Corporation and Chase Securities Inc.
   4.3   --Credit Agreement among Sterling Chemicals, Inc. and Texas Commerce
          Bank, individually and as Administrative Agent, Credit Suisse First
          Boston, individually and as Documentation Agent, and the other
          lenders named therein, dated January 31, 1997.
   4.4   --Second Amendment to Credit Agreement, dated as of March 31, 1997,
          amending the Credit Agreement of Sterling Chemicals, Inc. dated June
          21, 1996.
   4.5   --First Amendment to Credit Agreement, dated as of March 31, 1997,
          amending the Credit Agreement of Sterling Chemicals, Inc. dated
          January 31, 1997.
  11.1   --Earnings Per Share Calculation.
  27.1   --Financial Data Schedule of Sterling Chemicals Holdings, Inc.
  27.2   --Financial Data Schedule of Sterling Chemicals, Inc.
</TABLE>
 
  (b) Reports on Form 8-K:
 
  On March 24, 1997, the Company filed a current Report on Form 8-K, reporting
under Items 5 and 7.
 
                                      24
<PAGE>
 
                                   SIGNATURES
 
  Pursuant to the requirements of the Securities and Exchange Act of 1934, the
registrants have duly caused this report to be signed on their behalf by the
undersigned thereunto duly authorized.
 
                                          STERLING CHEMICALS HOLDINGS, INC.
                                          STERLING CHEMICALS, INC.
                                          (Registrants)
 
Date: May 15, 1997                        /s/ Robert W. Roten
                                          -------------------------------------
                                          Robert W. Roten
                                          President and Chief Executive
                                           Officer
                                          (Principal Executive Officer)
 
Date: May 15, 1997                        /s/ Jim P. Wise
                                          -------------------------------------
                                          Jim P. Wise
                                          Vice President--Finance and Chief
                                           Financial Officer
                                          (Principal Financial Officer)
 
 
                                       25

<PAGE>
 
                                                                     EXHIBIT 4.1
================================================================================

                            STERLING CHEMICALS, INC.

                                  $150,000,000


                   11 1/4% SENIOR SUBORDINATED NOTES DUE 2007



                               _________________


                                   INDENTURE

                           Dated as of April 7, 1997

                               _________________



                              FLEET NATIONAL BANK


                                    Trustee

================================================================================
<PAGE>
 
                             CROSS-REFERENCE TABLE

TRUST INDENTURE
ACT SECTION                                INDENTURE SECTION

310    (a)(1)...............................    8.10
       (a)(2)...............................    8.10
       (a)(3)...............................    N/A
       (a)(4)...............................    N/A
       (a)(5)...............................    8.10
       (b)..................................    8.10
       (c)..................................    N/A
311    (a)..................................    8.11
       (b)..................................    8.11
       (c)..................................    N/A
312    (a)..................................    2.05
       (b)..................................    12.03
       (c)..................................    12.03
313    (a)..................................    11.02
       (b)(i)...............................    11.02
       (b)(2)...............................    8.06
       (c)..................................    8.06; 11.02
       (d)..................................    8.06
314    (a)..................................    8.03; 11.02
       (b)..................................    11.03
       (c)(1)...............................    12.04
       (c)(2)...............................    12.04
       (c)(3)...............................    N/A
       (d)..................................    11.02; 11.03
       (e)..................................    12.05
       (f)..................................    N/A
315    (a)..................................    8.01
       (b)..................................    8.05; 12.02
       (c)..................................    8.01
       (d)..................................    8.01
       (e)..................................    7.11
316    (a)(1)(A)............................    7.05
       (a)(1)(B)............................    7.04
       (a)(2)...............................    N/A
       (b)..................................    7.07
317    (a)(1)...............................    7.08
       (a)(2)...............................    7.09
       (b)..................................    2.04
318    (a)..................................    12.01
       (b)..................................    N/A
       (c)..................................    12.01
 

   Note:  This Cross-Reference Table shall not, for any purpose, be deemed to be
part of the Indenture.

                                       i
<PAGE>
 
                               TABLE OF CONTENTS

   
                                                                      Page

PARTIES...............................................................   1

RECITALS OF STERLING..................................................   1


                                   ARTICLE I

                         DEFINITIONS AND INCORPORATION
                                  BY REFERENCE
 
    Section 1.01.    Definitions......................................   1
    Section 1.02.    Other Definitions................................  16
    Section 1.03.    Incorporation by Reference of Trust Indenture Act  16
    Section 1.04.    Rules of Construction............................  17

                                   ARTICLE II

                                   THE NOTES
 
    Section 2.01.    Form and Dating..................................  17
    Section 2.02.    Execution and Authentication.....................  18
    Section 2.03.    Registrar and Paying Agent.......................  19
    Section 2.04.    Paying Agent to Hold Money In Trust..............  20
    Section 2.05.    Lists of Holders of Notes........................  20
    Section 2.06.    Transfer and Exchange............................  20
    Section 2.07.    Replacement Notes................................  25
    Section 2.08.    Outstanding Notes................................  25
    Section 2.09.    Temporary Notes and Certificated Notes...........  26
    Section 2.10.    Cancellation.....................................  26
    Section 2.11.    Defaulted Interest...............................  27
    Section 2.12.    CUSIP Number.....................................  27

                                  ARTICLE III

                                   REDEMPTION
 
    Section 3.01.    Notices to Trustee...............................  27
    Section 3.02.    Selection of Notes to be Redeemed................  27
    Section 3.03.    Notice of Redemption.............................  28
    Section 3.04.    Effect of Notice of Redemption...................  28
    Section 3.05.    Deposit of Redemption Price......................  29
    Section 3.06.    Notes Redeemed in Part...........................  29

- ------------------------
    Note: This Table of Contents shall not, for any reason, be deemed to be part
of the Indenture.

                                       i
<PAGE>
 
                                  ARTICLE IV

                               CHANGE OF CONTROL

                                   ARTICLE V

                                   COVENANTS

                                                                     Page

    Section 5.01.    Payment of Principal, Premium and Interest.......  31
    Section 5.02.    Maintenance of Office or Agency..................  31
    Section 5.03.    SEC Reports......................................  31
    Section 5.04.    Limitation On Debt...............................  32
    Section 5.05.    Limitation On Restricted Payments................  33
    Section 5.06.    Limitation On Restrictions On Distributions from 
                     Restricted Subsidiaries..........................  37
    Section 5.07.    Limitation On Sales of Assets and Subsidiary 
                     Stock............................................  38
    Section 5.08.    Limitation On Transactions with Affiliates.......  40
    Section 5.09.    Limitation On the Sale or Issuance of Capital 
                     Stock of Restricted Subsidiaries.................  41
    Section 5.10.    Compliance Certificates..........................  41
    Section 5.11.    Further Instruments and Acts.....................  41

                                   ARTICLE VI

                                   SUCCESSORS

    Section 6.01.    When Sterling May Merge or Transfer Assets.......  42
    Section 6.02.    Successor Company Substituted....................  42

                                  ARTICLE VII

                             DEFAULTS AND REMEDIES
 

    Section 7.01.    Events of Default................................  43
    Section 7.02.    Acceleration.....................................  44
    Section 7.03.    Other Remedies...................................  44
    Section 7.04.    Waiver of Past Defaults..........................  45
    Section 7.05.    Control by Majority..............................  45
    Section 7.06.    Limitation On Suits..............................  45
    Section 7.07.    Unconditional Right of Holders of Notes to 
                     Receive Payment..................................  46
    Section 7.08.    Collection Suit by Trustee.......................  46
    Section 7.09.    Trustee May File Proofs of Claim.................  46
    Section 7.10.    Priorities.......................................  46
    Section 7.11.    Undertaking for Costs............................  47
    Section 7.12.    Waiver of Stay, Extension and Usury Laws.........  47

                                      ii
<PAGE>
 
                                                                      Page
                                 ARTICLE VIII

                                    TRUSTEE
 

    Section 8.01.    Duties of Trustee................................  47
    Section 8.02.    Rights of Trustee................................  48
    Section 8.03.    Individual Rights of Trustee.....................  49
    Section 8.04.    Trustee's Disclaimer.............................  49
    Section 8.05.    Notice of Default................................  49
    Section 8.06.    Reports by Trustee to Holders of Notes...........  49
    Section 8.07.    Compensation and Indemnity.......................  50
    Section 8.08.    Replacement of Trustee...........................  50
    Section 8.09.    Successor Trustee by Merger, Etc.................  51
    Section 8.10.    Eligibility; Disqualification....................  52
    Section 8.11.    Preferential Collection of Claims Against 
                     Sterling.........................................  52

                                   ARTICLE IX

                       DISCHARGE OF INDENTURE; DEFEASANCE

    Section 9.01.    Discharge of Liability on Notes; Defeasance......  52
    Section 9.02.    Conditions to Defeasance.........................  53
    Section 9.03.    Application of Trust Money.......................  54
    Section 9.04.    Repayment to Sterling............................  54
    Section 9.05.    Indemnity for Government Obligations.............  54
    Section 9.06.    Reinstatement....................................  54

                                   ARTICLE X
                                        
                        AMENDMENT, SUPPLEMENT AND WAIVER
 

    Section 10.01.    Without Consent of Holders of Notes.............  55
    Section 10.02.    With Consent of Holders of Notes................  56
    Section 10.03.    Compliance with Trust Indenture Act.............  57
    Section 10.04.    Revocation and Effect of Consents and Waivers...  57
    Section 10.05.    Notation On or Exchange of Notes................  57
    Section 10.06.    Trustee to Sign Amendments, Etc.................  57
    Section 10.07.    Payment for Consents............................  58

                                   ARTICLE XI

                             SUBORDINATION OF NOTES
 
    Section 11.01.   Notes Subordinate to Senior Debt; Notes Pari  
                     Passu with Senior Subordinated Debt..............  58
    Section 11.02.   Payment Over of Proceeds Upon Dissolution, Etc...  58
    Section 11.03.   No Payment When Senior Debt in Default...........  59
    Section 11.04.   Payment Permitted If No Default..................  60
 
                                      iii
<PAGE>
 
                                                                      Page

    Section 11.05.   Subrogation to Rights of Holders of Senior Debt..  60
    Section 11.06.   Provisions Solely to Define Relative Rights......  61
    Section 11.07.   Trustee to Effectuate Subordination..............  61
    Section 11.08.   No Waiver of Subordination Provisions............  61
    Section 11.09.   Notice to Trustee................................  62
    Section 11.10.   Reliance on Judicial Order or Certificate of
                     Liquidating Agent................................  62
    Section 11.11.   Trustee Not Fiduciary for Holders of Senior Debt.  63
    Section 11.12.   Rights of Trustee as Holder of Senior Debt;
                     Preservation of Trustee's Rights.................  63
    Section 11.13.   Article XI Applicable to Paying Agents...........  63
    Section 11.14.   Trust Moneys Not Subordinated....................  63

                                  ARTICLE XII

                                 MISCELLANEOUS
 

    Section 12.01.   Trust Indenture Act Controls.....................  63
    Section 12.02.   Notices..........................................  64
    Section 12.03.   Communication by Holders of Notes with Other 
                     Holders of Notes.................................  65
    Section 12.04.   Certificate and Opinion as to Conditions 
                     Precedent........................................  65
    Section 12.05.   Statements Required in Certificate or Opinion....  65
    Section 12.06.   Rules by Trustee and Agents......................  65
    Section 12.07.   No Personal Liability of Directors, Officers, 
                     Employees, Incorporators and Stockholders........  66
    Section 12.08.   Governing Law....................................  66
    Section 12.09.   No Adverse Interpretation of Other Agreements....  66
    Section 12.10.   Successors.......................................  66
    Section 12.11.   Severability.....................................  66
    Section 12.12.   Counterpart Originals............................  66
    Section 12.13.   Table of Contents, Headings, Etc.................  66
 


EXHIBIT A--Form of Initial Note
EXHIBIT B--Form of Exchange Note

                                      iv
<PAGE>
 
          INDENTURE, dated as of April 7, 1997, between Sterling Chemicals, Inc.
("Sterling"), a corporation duly organized and existing under the laws of the
State of Delaware, and Fleet National Bank, a national banking association duly
organized and existing under the laws of the United States of America, as
trustee (the "Trustee").


                              RECITALS OF STERLING

          Sterling has duly authorized the execution and delivery of this
Indenture to provide for the issuance of up to $150,000,000 aggregate principal
amount of Sterlings' 11 1/4% Senior Subordinated Notes Due 2007 issuable as
provided in this Indenture.  All things necessary to make this Indenture a valid
agreement of Sterling, in accordance with its terms, have been done, and
Sterling has done all things necessary to make the Notes, when executed by
Sterling and authenticated and delivered by the Trustee hereunder and duly
issued by Sterling, the valid obligations of Sterling as hereinafter provided.


           NOW, THEREFORE, THIS INDENTURE WITNESSETH:

          For and in consideration of the premises and the purchase of the Notes
by the Holders thereof, it is mutually agreed, for the equal and proportionate
benefit of all Holders of the Notes, as follows:


                                   ARTICLE I

                         DEFINITIONS AND INCORPORATION
                                  BY REFERENCE

Section 1.01.  Definitions.

          "Affiliate" means with respect to any specified Person any other
Person, directly or indirectly, controlling or controlled by or under direct or
indirect common control with such specified Person. For the purposes of this
definition, "control" when used with respect to any Person means the power to
direct the management and policies of such Person, directly or indirectly,
whether through the ownership of voting securities, by contract or otherwise;
and the terms "controlling" and "controlled" have meanings correlative to the
foregoing. For purposes of Section 5.07 and Section 5.08 only, the term
"Affiliate" shall also mean any beneficial owner (as defined in Rules 13d-3 and
13d-5 under the Exchange Act) of Capital Stock representing 10% or more of the
total voting power of the Voting Stock (on a fully diluted basis) of Sterling or
of rights or warrants to purchase such Capital Stock (whether or not currently
exercisable) and any Person who would be an Affiliate of any such beneficial
owner in accordance with the first sentence of this definition.

          "Agent" means any Registrar, Paying Agent or co-registrar.
          
          "Asset Disposition" means any sale, lease, transfer or other
disposition (or series of related sales, leases, transfers or dispositions) of
shares of Capital Stock of a Restricted Subsidiary (other than directors'
qualifying shares), property or other assets (each referred to for the purposes
of this definition as a "disposition") by Sterling or any of its Restricted
Subsidiaries,
<PAGE>
 
including any disposition by means of a merger, consolidation or similar
transaction, for gross proceeds in excess of $2.0 million, other than (i) a
disposition by a Restricted Subsidiary to Sterling or by Sterling or a
Restricted Subsidiary to a Wholly Owned Subsidiary; (ii) a disposition of
property or assets (other than shares of Capital Stock of a Restricted
Subsidiary and which do not constitute all or substantially all of the assets of
any division or line of business of Sterling or any Restricted Subsidiary) at
fair market value in the ordinary course of business; (iii) for purposes of
Section 5.07 only, a disposition that constitutes a Restricted Payment or a
Permitted Investment permitted pursuant to Section 5.05; (iv) the disposition of
all or substantially all of the assets of Sterling permitted pursuant to Section
6.01; and (v) the disposition of assets in exchange for other assets that
satisfy the requirement for replacement assets pursuant to Section
5.07(a)(ii)(2).

          "Attributable Debt" means, in respect of a Sale/Leaseback Transaction,
as at the time of determination, the present value (discounted at the interest
rate borne by the Notes, compounded annually) of the total obligations of the
lessee for rental payments during the remaining term of the lease included in
such Sale/Leaseback Transaction (including any period for which such lease has
been extended).

          "Average Life" means, as of the date of determination, with respect to
any Debt or Preferred Stock, the quotient obtained by dividing (i) the sum of
the products of numbers of years from the date of determination to the dates of
each successive scheduled principal payment of such Debt or redemption or
similar payment with respect to such Preferred Stock multiplied by the amount of
such payment, by (ii) the sum of all such payments.

           "Bankruptcy Law" means title 11, U.S. Code, or any similar federal or
state law for the relief of debtors.

          "Board of Directors" means the Board of Directors of Sterling or any
committee thereof duly authorized to act on behalf of such Board of Directors.

           "Business Day" means each day which is not a Legal Holiday.

          "Canadian Facility" means a revolving loan and letter of credit
facility for loans and letters of credit in Canadian dollars or U.S. dollars to
or for the account of Sterling Pulp Chemicals, Ltd., a Wholly Owned Subsidiary
of Sterling.

          "Capital Lease Obligations" means with respect to any Person any
obligation which is required to be classified and accounted for as a capital
lease on the face of a balance sheet of such Person prepared in accordance with
GAAP; the amount of such obligation shall be the capitalized amount thereof,
determined in accordance with GAAP; and the Stated Maturity thereof shall be the
date of the last payment of rent or any other amount due under such lease prior
to the first date upon which such lease may be terminated by the lessee without
payment of a penalty.

          "Capital Stock" means with respect to any Person any and all shares,
interests, rights to purchase, warrants, options, participations or other
equivalents of or interests in such Person (however designated), including any
Preferred Stock, but excluding any debt securities convertible into or
exchangeable for such equity.

           "Code" means the U.S. Internal Revenue Code of 1986, as amended.

                                       2
<PAGE>
 
          "Commodity Agreement" means any commodity future contract, commodity
option or other similar agreement or arrangement (limited in amount to
underlying exposure, and not for speculative purposes) entered into by Sterling
or any Restricted Subsidiary that is designed to protect Sterling or any
Restricted Subsidiary against fluctuations in the price of commodities used by
Sterling or a Restricted Subsidiary as raw materials in the ordinary course of
business.

          "Consolidated EBITDA Coverage Ratio" means, as of any date of
determination, the ratio of (i) the aggregate amount of EBITDA for the period of
the most recent four consecutive fiscal quarters ending at least 45 days prior
to the date of such determination to (ii) Consolidated Interest Expense for such
four fiscal quarters; provided, however, that (1) if Sterling or any Restricted
Subsidiary has Incurred any Debt since the beginning of such period that remains
outstanding or if the transaction giving rise to the need to calculate the
Consolidated EBITDA Coverage Ratio is an Incurrence of Debt, or both, EBITDA and
Consolidated Interest Expense for such period shall be calculated after giving
effect on a pro forma basis to such Debt as if such Debt had been Incurred on
the first day of such period and the discharge of any other Debt repaid,
repurchased, defeased or otherwise discharged with the proceeds of such new Debt
as if such discharge had occurred on the first day of such period, (2) if since
the beginning of such period Sterling or any Restricted Subsidiary shall have
made any Asset Disposition, the EBITDA for such period shall be reduced by an
amount equal to the EBITDA (if positive) directly attributable to the assets
which are the subject of such Asset Disposition for such period, or increased by
an amount equal to the EBITDA (if negative), directly attributable thereto for
such period, and Consolidated Interest Expense for such period shall be reduced
by an amount equal to the Consolidated Interest Expense directly attributable to
any Debt of Sterling or any Restricted Subsidiary repaid, repurchased, defeased
or otherwise discharged with respect to Sterling and its continuing Restricted
Subsidiaries in connection with such Asset Dispositions for such period (or, if
the Capital Stock of any Restricted Subsidiary is sold, the Consolidated
Interest Expense for such period directly attributable to the Debt of such
Restricted Subsidiary to the extent Sterling and its continuing Restricted
Subsidiaries are no longer liable for such Debt after such sale), (3) if since
the beginning of such period Sterling or any Restricted Subsidiary (by merger or
otherwise) shall have made an Investment in any Restricted Subsidiary (or any
Person which becomes a Restricted Subsidiary) or an acquisition of assets,
including any acquisition of assets occurring in connection with a transaction
causing a calculation to be made hereunder, which constitutes all or
substantially all of an operating unit of a business, EBITDA and Consolidated
Interest Expense for such period shall be calculated after giving pro forma
effect thereto (including the Incurrence of any Debt) as if such Investment or
acquisition occurred on the first day of such period, and (4) if since the
beginning of such period any Person (that subsequently became a Restricted
Subsidiary or was merged with or into Sterling or any Restricted Subsidiary
since the beginning of such period) shall have made any Asset Disposition or any
Investment that would have required an adjustment pursuant to clause (2) or (3)
above if made by Sterling or a Restricted Subsidiary during such period, EBITDA
and Consolidated Interest Expense for such period shall be calculated after
giving pro forma effect thereto as if such Asset Disposition or Investment
occurred on the first day of such period. For purposes of this definition,
whenever pro forma effect is to be given to an acquisition of assets, the amount
of income or earnings relating thereto, and the amount of Consolidated Interest
Expense associated with any Debt Incurred in connection therewith, the pro forma
calculations shall be determined in good faith by a responsible financial or
accounting Officer of Sterling. If any Debt bears a floating rate of interest
and is being given pro forma effect, the interest of such Debt shall be
calculated as if the rate in effect on the date of determination had been the
applicable rate for the entire period (taking into account any Interest Rate
Agreement applicable to such Debt if such Interest Rate Agreement has a
remaining term in excess of 12 months).

                                       3
<PAGE>
 
          "Consolidated Interest Expense" means, for any period, the total
interest expense of Sterling and its consolidated Restricted Subsidiaries, plus,
to the extent not included in such interest expense, (i) interest expense
attributable to Capital Lease Obligations; (ii) amortization of debt discount
and debt issuance cost; (iii) capitalized interest; (iv) non-cash interest
payments; (v) commissions, discounts and other fees and charges owed with
respect to letters of credit and bankers' acceptance financing; (vi) net costs
under Interest Rate Agreements (including amortization of fees); (vii) Preferred
Stock dividends in respect of all Redeemable Stock of Sterling and all Preferred
Stock of Restricted Subsidiaries held by Persons other than Sterling or a Wholly
Owned Subsidiary; (viii) interest incurred in connection with Investments in
discontinued operations; (ix) interest actually paid by Sterling or any of its
Restricted Subsidiaries under any Guarantee of Debt or other obligation of any
other Person; and (x) the cash contributions to any employee stock ownership
plan or similar trust to the extent such contributions are used by such plan or
trust to pay interest or fees to any Person (other than Sterling or any
Restricted Subsidiary) in connection with Debt Incurred by such plan or trust.

          "Consolidated Net Income" means, for any period, the net income of
Sterling and its consolidated Subsidiaries; provided, however, that there shall
not be included in such Consolidated Net Income (i) any net income of any Person
if such Person is not a Restricted Subsidiary, except that (A) subject to the
exclusion contained in clause (iv) below, Sterling's equity in the net income of
any such Person for such period shall be included in such Consolidated Net
Income up to the aggregate amount of cash actually distributed by such Person
during such period to Sterling or a Restricted Subsidiary as a dividend or other
distribution (subject, in the case of a dividend or other distribution to a
Restricted Subsidiary, to the limitations contained in clause (iii) below), and
(B) Sterling's equity in a net loss of any such Person for such period shall be
included in determining such Consolidated Net Income to the extent of any cash
actually contributed by Sterling or a Restricted Subsidiary to such Person
during such period; (ii) any net income (or loss) of any Person acquired by
Sterling or a Subsidiary in a pooling of interests transaction for any period
prior to the date of such acquisition; (iii) any net income of any Restricted
Subsidiary to the extent such Restricted Subsidiary is subject to restrictions,
directly or indirectly, on the payment of dividends or the making of
distributions by such Restricted Subsidiary, directly or indirectly, to
Sterling, except that (A) subject to the exclusion contained in clause (iv)
below, Sterling's equity in the net income of any such Restricted Subsidiary for
such period shall be included in such Consolidated Net Income up to the
aggregate amount of cash actually distributed by such Restricted Subsidiary
during such period to Sterling or another Restricted Subsidiary as a dividend or
other distribution (subject, in the case of a dividend or other distribution to
another Restricted Subsidiary, to the limitation contained in this clause), and
(B) Sterling's equity in a net loss of any such Restricted Subsidiary for such
period shall be included in determining such Consolidated Net Income; (iv) any
gain or loss realized upon the sale or other disposition of any assets of
Sterling or its consolidated Subsidiaries (including pursuant to any sale-and-
leaseback arrangement) which is not sold or otherwise disposed of in the
ordinary course of business and any gain or loss realized upon the sale or other
disposition of any Capital Stock of any Person; (v) extraordinary gains or
losses; and (vi) the cumulative effect of a change in accounting principles.
Notwithstanding the foregoing, for the purposes of Section 5.05 only, there
shall be excluded from Consolidated Net Income any dividends, repayments of
loans or advances or other transfers of assets from Unrestricted Subsidiaries to
Sterling or a Restricted Subsidiary to the extent such dividends, repayments or
transfers increase the amount of Restricted Payments permitted pursuant to
Section 5.05(a)(iv)(3)(E).

                                       4
<PAGE>
 
          "Consolidated Net Worth" means with respect to any Person the total of
the amounts shown on the balance sheet of such Person and its consolidated
subsidiaries, determined on a consolidated basis in accordance with GAAP, as of
the end of the most recent fiscal quarter of such Person ending at least 45 days
prior to the taking of any action for the purpose of which the determination is
being made, as (i) the par or stated value of all outstanding Capital Stock of
such Person, plus (ii) paid-in capital or capital surplus relating to such
Capital Stock, plus (iii) any retained earnings or earned surplus, less (A) any
accumulated deficit, (B) any amounts attributable to Redeemable Stock, and (C)
any amounts attributable to Exchangeable Stock.

          "Corporate Trust Office of the Trustee" shall be at the address of the
Trustee specified in Section 12.02 or such other address as to which the Trustee
may give notice to Sterling.

          "Credit Agreements" means (i) the agreement, dated June 21, 1996,
among Sterling, as borrower, Texas Commerce Bank National Association, as
administrative agent, and the other lenders party thereto, and their respective
successors and assigns, and (ii) the agreement dated January 31, 1997, among
Sterling, as borrower, Texas Commerce Bank National Association, as
administrative agent, and the other lenders party thereto and their respective
successors and assigns, in each case, as the same may be amended, supplemented,
waived and otherwise modified from time to time in accordance with the terms
thereof.

          "Currency Agreement" means with respect to any Person any foreign
exchange contract, currency swap agreement or other similar agreement (limited
in amount to underlying exposure, and not for speculative purposes) to which
such Person is a party or a beneficiary.

           "Custodian" means any receiver, trustee, assignee, liquidator or
similar official under any Bankruptcy Law.

          "Debt" means with respect to any Person, without duplication, (i) the
principal of and premium (if any) in respect of (A) indebtedness of such Person
for money borrowed and (B) indebtedness evidenced by notes, debentures, bonds or
other similar instruments for the payment of which such Person is responsible or
liable; (ii) all Capital Lease Obligations of such Person and all Attributable
Debt in respect of Sale/Leaseback Transactions entered into by such Person;
(iii) all obligations of such Person issued or assumed as the deferred purchase
price of property, all conditional sale obligations of such Person and all
obligations of such Person under any title retention agreement (but excluding
trade accounts payable arising in the ordinary course of business); (iv) all
obligations of such Person for the reimbursement of any obligor on any letter of
credit, banker's acceptance or similar credit transaction (other than
obligations with respect to letters of credit securing obligations (other than
obligations described in (i) through (iii) above) entered into in the ordinary
course of business of such Person to the extent such letters of credit are not
drawn upon or, if and to the extent drawn upon, such drawing is reimbursed no
later than the third Business Day following receipt by such Person of a demand
for reimbursement following payment on the letter of credit); (v) all Redeemable
Stock of such Person and, with respect to any Subsidiary of such Person, all
Preferred Stock other than pay-in-kind dividends in the form of Preferred Stock
(the amount of Debt represented thereby shall equal the greater of its
liquidation preference and the redemption, repayment or other repurchase
obligations with respect thereto, but excluding any accrued dividends); (vi) all
Hedging Obligations of such Person; (vii) all obligations of the type referred
to in clauses (i) through (v) of other Persons and all dividends of other
Persons for the payment of which, in either case, such Person is responsible or
liable, directly or indirectly, as obligor, guarantor or

                                       5
<PAGE>
 
otherwise, including by means of any Guarantee; and (viii) all obligations of
the type referred to in clauses (i) through (vi) of other Persons secured by any
Lien on any property or asset of such Person (whether or not such obligation is
assumed by such Person), the amount of such obligation being deemed to be the
lesser of the value of such property or assets or the amount of the obligation
so secured. The amount of Debt of any Person at any date shall be the
outstanding balance of such date of all unconditional obligations as described
above and the maximum liability upon the occurrence of the contingency giving
rise to the obligation, of any contingent obligations at such date; provided,
however, that the amount outstanding at any time of any Debt Incurred with
original issue discount is the face amount of such Debt less the remaining
unamortized portion of the original issue discount of such Debt at such time as
determined in conformity with GAAP.

           "Default" means any event that is, after notice or with the passage
of time or both would be, an Event of Default.

           "Depository" means The Depository Trust Company, its nominees and
their respective successors.

          "Designated Senior Debt" means the Debt under the Credit Agreements
and any bank credit facility refinancing such debt.

          "Discount Notes" means $191,751,000 aggregate principal amount at
maturity of 13 1/2% Senior Secured Discount Notes Due 2008 of Holdings issued
pursuant to the Discount Notes Indenture.

          "Discount Notes Indenture" means that certain Indenture, dated as of
August 15, 1996, among Holdings and Fleet National Bank, as Trustee, relating to
the Discount Notes, as the same may be amended or supplemented in accordance
with its terms.

          "EBITDA" means for any period the sum of Consolidated Net Income, plus
Consolidated Interest Expense plus the following to the extent deducted in
calculating such Consolidated Net Income: (i) all income tax expense of
Sterling; (ii) depreciation expense; (iii) amortization expense; (iv) an amount
equal to any extraordinary gain or loss realized in connection with an Asset
Disposition; (v) the impact of accruals for periods prior to the Issue Date for
Sterling's Stock Appreciation Rights Plan; and (vi) all other non-cash items
reducing such Consolidated Net Income (excluding any non-cash item to the extent
it represents an accrual of, or reserve for, cash disbursements for any
subsequent period) less all non-cash items increasing such Consolidated Net
Income (such amount calculated pursuant to this clause (vi) not to be less than
zero), in each case for such period. Notwithstanding the foregoing, the
provision for taxes based on the income or profits of, and the depreciation and
amortization of, a Subsidiary of Sterling shall be added to Consolidated Net
Income to compute EBITDA only to the extent (and in the same proportion) that
the net income of such Subsidiary was included in calculating Consolidated Net
Income and only if a corresponding amount would be permitted at the date of
determination to be dividended or otherwise paid to Sterling by such Subsidiary
without prior approval (that has not been obtained), pursuant to the terms of
its charter and all agreements, instruments, judgments, decrees, orders,
statutes, rules and governmental regulations applicable to such Subsidiary or
its stockholders.

                                       6
<PAGE>
 
          "Equity Private Placement" means the private placement of shares of
common stock of STX Acquisition Corp. (which shares were converted into shares
of common stock of Holdings) in connection with the recapitalization of Sterling
consummated on August 21, 1996.

           "ESOP" means the employee stock ownership plan of Sterling.

           "ESOP Loan" means the loan from Sterling to the ESOP of $6.5 million
in connection with the formation of the ESOP.

          "ESOP Loan Provisions" means the provisions of the Credit Agreement
pursuant to which lenders thereunder have committed to make ESOP loans available
to Sterling.

           "Exchange Act" means the U.S. Securities Exchange Act of 1934, as
amended.

          "Exchange Notes" means the 11 1/4% Senior Subordinated Notes Due 2007
to be issued pursuant to this Indenture in connection with a Registered Exchange
Offer pursuant to the Registration Rights Agreement.

          "Exchangeable Stock" means any Capital Stock which is exchangeable or
convertible into another security (other than Capital Stock of Sterling which is
neither Exchangeable Stock nor Redeemable Stock).

          "Existing Subordinated Notes" means $275,000,000 in original principal
amount of Sterling's 11 3/4 Senior Subordinated Notes Due 2006 issued August 21,
1996.

          "Existing Subordinated Notes Indenture" means that certain Indenture,
dated as of August 15, 1996, between Sterling and Fleet National Bank, as
Trustee, relating to the Existing Subordinated Notes.

          "Foreign Asset Sale" means an Asset Disposition in respect of Capital
Stock or assets of a Foreign Subsidiary or a Restricted Subsidiary of the type
described in Section 936 of the Code to the extent that the proceeds of such
Asset Disposition are received by a Person subject in respect of such proceeds
to the tax laws of a jurisdiction other than the United States or any state
thereof or the District of Columbia.

          "Foreign Subsidiary" means a Restricted Subsidiary that is
incorporated in a jurisdiction other than the United States or a State thereof
or the District of Columbia and with respect to which more than 66-2/3% of any
of its sales, earnings or assets (determined on a consolidated basis in
accordance with GAAP) are located in, generated from or derived from operations
located in territories or jurisdictions outside the United States.

          "GAAP" means generally accepted accounting principles in the United
States of America as in effect as of the Issue Date, including those set forth
(i) in the opinions and pronouncements of the Accounting Principles Board of the
American Institute of Certified Public Accountants; (ii) statements and
pronouncements of the Financial Accounting Standards Board; (iii) in such other
statements by such other entity as approved by a significant segment of the
accounting profession; and (iv) the rules and regulations of the SEC governing
the inclusion of financial statements (including pro forma financial statements)
in periodic reports required to be filed pursuant to Section 13 of the Exchange
Act, including opinions and pronouncements in staff accounting bulletins and
similar written statements from the accounting staff of the SEC.

                                       7
<PAGE>
 
          "Guarantee" means any obligation, contingent or otherwise, of any
Person directly or indirectly guaranteeing any Debt or other obligation of any
Person and any obligation, direct or indirect, contingent or otherwise, of such
Person (i) to purchase or pay (or advance or supply funds for the purchase or
payment of) such Debt or other obligation of such Person (whether arising by
virtue of partnership arrangements, or by agreement to keep-well, to purchase
assets, goods, securities or services, to take-or-pay, or to maintain financial
statement conditions or otherwise); or (ii) entered into for purposes of
assuring in any other manner the obligee of such Debt or other obligation of the
payment thereof or to protect such obligee against loss in respect thereof (in
whole or in part); provided, however, that the term "Guarantee" shall not
include endorsements for collection or deposit in the ordinary course of
business or guarantees of obligations of a Subsidiary in the ordinary course of
business if such obligations do not constitute Debt of such Subsidiary.  The
term "Guarantee" used as a verb shall have a corresponding meaning.

          "Hedging Obligations" means with respect to any Person the obligations
of such Person pursuant to any Interest Rate Agreement, Currency Agreement or
Commodity Agreement (limited in amount to underlying exposure, and not for
speculative purposes).

           "Holder" means the Person in whose name a Note is registered on the
Note Register.

           "Holdings" means Sterling Chemicals Holdings, Inc., a Delaware
corporation.

          "Incur" means issue, assume, Guarantee, incur or otherwise become
liable for; provided, however, that any Debt or Capital Stock of a Person
existing at the time such Person becomes a Subsidiary (whether by merger,
consolidation, acquisition or otherwise) shall be deemed to be Incurred by such
Subsidiary at the time it becomes a Subsidiary.  The term "Incurrence" when used
as a noun shall have a correlative meaning.  The accretion of principal of a
non-interest bearing or other discount security shall be deemed to be the
Incurrence of Debt.

          "Indenture" means this Indenture, as amended, supplemented or
otherwise modified from time to time in accordance with the terms hereof.

          "Independent Financial Advisor" means a reputable accounting,
appraisal or investment banking firm that, in the reasonable good faith judgment
of the Board of Directors, is qualified to perform the task for which such firm
has been engaged and is independent with respect to Sterling and its Affiliates.

          "Initial Notes" means the 11 1/4% Senior Subordinated Notes Due 2007
issued under this Indenture on or about the date hereof.

           "Initial Purchasers" means Credit Suisse First Boston Corporation and
Chase Securities Inc.

          "Interest Rate Agreement" means any interest rate swap agreement,
interest rate cap agreement or other financial agreement or arrangement (limited
in amount to underlying exposure, and not for speculative purposes) designed to
protect Sterling or any Restricted Subsidiary against fluctuations in interest
rates.

                                       8
<PAGE>
 
          "Investment" means with respect to any Person any loan or advance to,
any acquisition of Capital Stock, equity interest, obligation or other security
of, or capital contribution or other investment in, or any other credit
extension to (including by way of Guarantee of any Debt of), such Person. For
purposes of the definition of "Unrestricted Subsidiary", the definition of
"Restricted Payment" and Section 5.05 of this Indenture, (i) "Investment" shall
include the portion (proportionate to Sterling's equity interest in such
Subsidiary) of the fair market value of the net assets of any Subsidiary of
Sterling at the time that such Subsidiary is designated an Unrestricted
Subsidiary; provided, however, that if such designation is made in connection
with the acquisition of such Subsidiary or the assets owned by such Subsidiary,
the "Investment" in such Subsidiary shall be deemed to be the consideration paid
in connection with such acquisition; provided, further, however, that upon a
redesignation of such Subsidiary as a Restricted Subsidiary, Sterling shall be
deemed to continue to have a permanent "Investment" in an Unrestricted
Subsidiary equal to an amount (if positive) equal to (x) Sterling's "Investment"
in such Subsidiary at the time of such redesignation less (y) the portion
(proportionate to Sterling's equity interest in such Subsidiary) of the fair
market value of the net assets of such Subsidiary at the time of such
redesignation; and (ii) any property transferred to or from an Unrestricted
Subsidiary shall be valued at its fair market value at the time of such
transfer, in each case as determined in good faith by the Board of Directors.

          "Investment Grade Rating" means a rating of BBB- or higher by S&P and
Baa3 or higher by Moody's or the equivalent of such rating by S&P and Moody's or
by any other Rating Agencies selected as provided in the definition of Rating
Agency.

           "Issue Date" means the date on which the Initial Notes are originally
issued.

          "Legal Holiday" means a Saturday, a Sunday or a day on which banking
institutions in the City of New York, in the city of the Corporate Trust Office
of the Trustee or at a place of payment are authorized by law, regulation or
executive order to remain closed.  If a payment date is a Legal Holiday, payment
may be made at that place on the next succeeding day that is not a Legal
Holiday, and no interest shall accrue for the intervening period.

          "Lien" means any mortgage, pledge, security interest, encumbrance,
lien or charge of any kind (including any conditional sale or other title
retention agreement or lease in the nature thereof).

           "Moody's" means Moody's Investor Service, Inc.

          "Net Available Cash" from an Asset Disposition means cash payments
received (including any cash payments received by way of deferred payment of
principal pursuant to a note or installment receivable or otherwise, but only as
and when received, but excluding any other consideration received in the form of
assumption by the acquiring Person of Debt or other obligations relating to such
properties or assets that are the subject of such Asset Disposition or received
in any other noncash form) therefrom, in each case net of (i) all legal, title
and recording expenses, commissions and other fees and expenses incurred, and
all Federal, state, provincial, foreign and local taxes required to be accrued
as a liability under GAAP, as a consequence of such Asset Disposition; (ii) all
payments made on any Debt which is secured by any assets subject to such Asset
Disposition, in accordance with the terms of any Lien upon or other security
agreement of any kind with respect to such assets, or which must by its terms,
or in order to obtain a necessary consent to such Asset Disposition, or by
applicable law be repaid out of the proceeds from such Asset Disposition; (iii)
all distributions and other payments required to be

                                       9
<PAGE>
 
made to minority interest holders in Subsidiaries or joint ventures as a result
of such Asset Disposition; and (iv) the deduction of appropriate amounts
provided by the sellers as a reserve, in accordance with GAAP, against any
liabilities associated with the property or other assets disposed in such Asset
Disposition and retained by Sterling or any Restricted Subsidiary after such
Asset Disposition.

          "Net Cash Proceeds" means with respect to any issuance or sale of
Capital Stock, the cash proceeds of such issuance or sale net of attorneys'
fees, accountants' fees, underwriters' or placement agents' fees, discounts or
commissions and brokerage, consultant and other fees actually incurred in
connection with such issuance or sale and net of taxes paid or payable as a
result thereof.

          "Non-Convertible Capital Stock" means, with respect to any
corporation, any non-convertible Capital Stock of such corporation and any
Capital Stock of such corporation convertible solely into non-convertible common
stock of such corporation; provided, however, that Non-Convertible Capital Stock
shall not include any Redeemable Stock or Exchangeable Stock.

           "Notes" means the Initial Notes, the Exchange Notes and the Private
Exchange Notes, treated as a single class.

          "Notes Custodian" means the custodian with respect to a Global Note
(as appointed by the Depository), or any successor person thereto and shall
initially be the Trustee.

          "Officer" means with respect to any Person the Chairman of the Board,
the Chief Executive Officer, the President, the Chief Operating Officer, the
Chief Financial Officer, the Treasurer, Controller, Secretary or any Vice-
President of such Person.

          "Officers' Certificate" means a certificate signed on behalf of
Sterling by two Officers of Sterling, one of whom must be the principal
executive officer, principal financial officer, treasurer or principal
accounting officer of Sterling.

          "Opinion of Counsel" means a written opinion from legal counsel, who
may be an employee of or counsel to Sterling or the Trustee.

          "Permitted Holders" means (i) the purchasers in the Equity Private
Placement; (ii) any Person who on the date of issuance of the Notes is an
officer, director, stockholder, employee or consultant of The Sterling Group,
Inc., or The Unicorn Group, L.L.C.; (iii) each of Frank J. Hevrdejs, William C.
Oehmig, J. Virgil Waggoner, Robert W. Roten and Gordon Cain; (iv) any Permitted
Transferee with respect to any Person covered by the preceding clauses (i)
through (iii) hereof; (v) the ESOP; or (vi) any savings or investment plan
sponsored by Sterling or Holdings.

          "Permitted Investment" means an Investment by Sterling or any
Restricted Subsidiary in (i) a Wholly Owned Subsidiary or a Person that will,
upon the making of such Investment, become a Wholly Owned Subsidiary; (ii)
Temporary Cash Investments; (iii) receivables owing to Sterling or any
Restricted Subsidiary if created or acquired in the ordinary course of business
and payable or dischargeable in accordance with customary trade terms; (iv)
stock, obligations or securities received in settlement of debts created in the
ordinary course of business and owing to Sterling or any Restricted Subsidiary
or in satisfaction of judgments; (v)

                                       10
<PAGE>
 
any Person to the extent such Investment represents the non-cash portion of the
consideration received for an Asset Disposition as permitted pursuant to Section
5.07; (vi) Investments by Sterling or a Restricted Subsidiary in a Person to the
extent the consideration for such Investment consists of shares of Capital Stock
of Sterling or Holdings (other than Redeemable Stock of Sterling); (vii)
payroll, travel and similar advances to cover matters that are expected at the
time of such advances ultimately to be treated as expenses for accounting
purposes and that are made in the ordinary course of business; (viii) loans or
advances to employees or to a trust for the benefit of such employees that are
made in the ordinary course of business of Sterling or such Restricted
Subsidiary; (ix) the ESOP Loan; (x) another Person if as a result of such
Investment such Person is merged or consolidated with or into, or transfers or
conveys all or substantially all of its assets to, Sterling or a Restricted
Subsidiary; provided that such Person's primary business is reasonably related
to the business of Sterling and its Restricted Subsidiaries; and (xi)
Investments in Unrestricted Subsidiaries or joint ventures (whether in corporate
or partnership form or otherwise), in either case in entities engaged in
businesses reasonably related to the business of Sterling and its Restricted
Subsidiaries, in an aggregate amount not to exceed $10 million; provided,
however, that the amount available for Investments pursuant to this clause (xi)
shall be reduced pursuant to Section 5.05(a)(iv)(3)(G).

          "Permitted Transferee" means with respect to any Person (i) in the
case of an entity, any Affiliate of such Person; and (ii) in the case of an
individual, any person related by lineal or collateral consanguinity to such
individual or to the spouse of such individual (adopted persons shall be
considered the natural born child of their adoptive parents; lineal
consanguinity is the relationship that exists between persons of whom one is
descended (or ascended) in direct line from the other, as between son, father,
grandfather, great-grandfather; and collateral consanguinity is that
relationship that exists between persons who have the same ancestors, but do not
descend (or ascend) from the other, as between uncle and nephew, or cousin and
cousin), in each case to whom such Person has transferred common stock of
Holdings.

          "Person" means any individual, corporation, partnership, joint
venture, association, joint-stock company, trust, unincorporated organization,
government or any agency or political subdivision thereof or any other entity.

          "Preferred Stock" means, as applied to the Capital Stock of any
corporation, Capital Stock of any class or classes (however designated) which is
preferred as to the payment of dividends, or as to the distribution of assets
upon any voluntary or involuntary liquidation or dissolution of such
corporation, over shares of Capital Stock of any other class of such
corporation.

          "Private Exchange" means the offer by Sterling, pursuant to the
Registration Rights Agreement, to the Initial Purchasers to issue and deliver to
the Initial Purchasers, in exchange for the Initial Notes held by the Initial
Purchasers as part of their initial distribution, a like aggregate principal
amount of Private Exchange Notes.

          "Private Exchange Notes" means the 11 1/4% Senior Subordinated Notes
Due 2007 to be issued pursuant to this Indenture in connection with a Private
Exchange effected pursuant to the Registration Rights Agreement.

          "Public Equity Offering" means an underwritten primary public offering
of common stock of Holdings pursuant to an effective registration statement
under the Securities Act.

                                       11
<PAGE>
 
          "Public Market" means any time after (i) a Public Equity Offering has
been consummated; and (ii) at least 15% of the total issued and outstanding
common stock of Holdings has been distributed by means of an effective
registration statement under the Securities Act or sales pursuant to Rule 144
under the Securities Act.

          "Rating Agency" means S&P and Moody's, or if S&P or Moody's or both
shall not make a rating on the Notes publicly available, a nationally recognized
statistical rating agency or agencies, as the case may be, selected by Sterling
(as certified by a resolution of the Board of Directors) which shall be
substituted for S&P or Moody's or both, as the case may be.

          "Redeemable Stock" means any Capital Stock that by its terms or
otherwise is required to be redeemed on or prior to the Stated Maturity of the
Notes or is redeemable at the option of a Holder thereof at any time on or prior
to the Stated Maturity of the Notes.

          "Refinance" means, with respect to any Debt, to refinance, extend,
renew, refund, repay, prepay, redeem, defease or retire, or to issue other Debt
in exchange or replacement for, such indebtedness.  "Refinanced" and
"Refinancing" shall have correlative meanings.

          "Refinancing Debt" means Debt that Refinances any Debt of Sterling or
any Restricted Subsidiary existing on the Issue Date or Incurred in compliance
with this Indenture including Debt that Refinances Refinancing Debt; provided,
however, that (i) such Refinancing Debt has a Stated Maturity no earlier than
the Stated Maturity of the Debt being Refinanced; (ii) such Refinancing Debt has
an Average Life at the time such Refinancing Debt is Incurred that is equal to
or greater than the Average Life of the Debt being Refinanced; (iii) such
Refinancing Debt has an aggregate principal amount (or if Incurred with original
issue discount, an aggregate issue price) that is equal to or less than the
aggregate principal amount (or if Incurred with original issue discount, the
aggregate accreted value) then outstanding or committed (plus fees and expenses,
including any premium and defeasance costs) under the Debt being Refinanced; and
(iv) with respect to any Refinancing Debt of Debt other than Senior Debt, such
Refinancing Debt shall rank no more senior, and shall be at least as
subordinated, in right of payment to the Notes as the Debt being so extended,
renewed, refunded or refinanced; provided, further, however, that Refinancing
Debt shall not include (x) Debt of a Subsidiary that Refinances Debt of
Sterling, or (y) Debt of Sterling or a Restricted Subsidiary that Refinances
Debt of an Unrestricted Subsidiary.

          "Registered Exchange Offer" means an offer by Sterling, pursuant to
the Registration Rights Agreement, to certain Holders of Initial Notes, to issue
and deliver to such Holders, in exchange for the Initial Notes, a like aggregate
principal amount of Exchange Notes registered under the Securities Act.

          "Registration Rights Agreement" means the Registration Rights
Agreement dated April 1, 1997 among Sterling and the Initial Purchasers.

          "Responsible Officer" means, when used with respect to the Trustee,
any officer within the Corporate Trust Administration of the Trustee (or any
successor group of the Trustee) or any other officer of the Trustee customarily
performing functions similar to those performed by any of the above designated
officers.

           "Restricted Subsidiary" means any Subsidiary of Sterling that is not
an Unrestricted Subsidiary.

                                       12
<PAGE>
 
          "Revolving Credit Provisions" means the provisions of the Credit
Agreements pursuant to which lenders thereunder have committed to make available
to Sterling, a revolving credit facility, including the Canadian Facility.

          "Sale/Leaseback Transaction" means an arrangement relating to property
now owned or hereafter acquired whereby Sterling or a Restricted Subsidiary
transfers such property to a Person and Sterling or a Restricted Subsidiary
leases it from such Person.

          "SEC" means the U.S. Securities and Exchange Commission.
          "Secured Debt" means any Debt of Sterling secured by a Lien.

          "Securities Act" means the U.S. Securities Act of 1933, as amended.

          "Senior Debt" means (i) Debt of Sterling, whether outstanding on the
Issue Date or thereafter Incurred; and (ii) accrued and unpaid interest
(including interest accruing on or after the filing of any petition in
bankruptcy or for reorganization relating to Sterling whether or not such
interest is an allowable claim in any such proceeding) in respect of (A)
indebtedness of Sterling for money borrowed and (B) indebtedness evidenced by
notes, debentures, bonds or other similar instruments for the payment of which
Sterling is responsible or liable unless, in the instrument creating or
evidencing the same or pursuant to which the same is outstanding, it is provided
that such obligations are subordinate in right of payment to the Notes;
provided, however, that Senior Debt shall not include (1) any obligation of
Sterling to Holdings or any subsidiary of Holdings, (2) any liability for
Federal, state, local or other taxes owed or owing by Sterling, (3) any accounts
payable or other liability to trade creditors arising in the ordinary course of
business (including guarantees thereof or instruments evidencing such
liabilities), (4) any Debt of Sterling (and any accrued and unpaid interest in
respect thereof) which is subordinate or junior in any respect to any other Debt
or other obligation of Sterling, (5) that portion of any Debt which at the time
of Incurrence is Incurred in violation of this Indenture, (6) Debt owed, due, or
guaranteed on behalf of, any director, officer or employee of Sterling or any
Subsidiary (including, without limitation, amounts owed for compensation), and
(7) Debt which when Incurred and without respect to any election under Section
1111(b) of Title 11 United States Code, is without recourse to Sterling.

          "Senior Subordinated Debt" means the Notes, the Existing Subordinated
Notes and any other Debt of Sterling that specifically provides that such Debt
is to rank pari passu with the Notes in right of payment and is not subordinated
by its terms in right of payment to any Debt or other obligation of Sterling
which is not Senior Debt.

          "Shelf Registration Statement" means the registration statement issued
by Sterling in connection with the offer and sale of Initial Notes or Private
Exchange Notes, pursuant to the Registration Rights Agreement.

          "Significant Subsidiary" means any Restricted Subsidiary that would be
a "significant subsidiary" of Sterling as such term is defined in Rule 1-02 of
Regulation S-X, promulgated by the SEC.

           "S&P" means Standard & Poor's Ratings Group.

                                       13
<PAGE>
 
          "Stated Maturity" means with respect to any security the date
specified in such security as the fixed date on which the principal of such
security is due and payable, including pursuant to any mandatory redemption
provision (but excluding any provision providing for the repurchase of such
security at the option of the holder thereof upon the happening of any
contingency unless such contingency has occurred).

          "Subordinated Obligation" means any Debt of Sterling (whether
outstanding on the Issue Date or thereafter Incurred) that is subordinate or
junior in right of payment to the Notes.

          "Subsidiary" means any corporation, association, partnership or other
business entity of which more than 50% of the total voting power of shares of
Capital Stock or other interests (including partnership interests) entitled
(without regard to the occurrence of any contingency) to vote in the election of
directors, managers or trustees thereof is at the time owned or controlled,
directly or indirectly, by (i) Sterling; (ii) Sterling and one or more
Subsidiaries; or (iii) one or more Subsidiaries.

          "Tangible Property" means all land, buildings, machinery and equipment
and leasehold interests and improvements which would be reflected on a balance
sheet of Sterling prepared in accordance with GAAP, excluding (i) all rights,
contracts and other intangible assets of any nature whatsoever; and (ii) all
inventories and other current assets.

          "Temporary Cash Investments" means any of the following: (i) any
investment in direct obligations of the United States of America or any agency
thereof or obligations guaranteed by the United States of America or any agency
thereof; (ii) investments in time deposit accounts, certificates of deposit and
money market deposits maturing within 270 days of the date of acquisition
thereof issued by a bank or trust company which is organized under the laws of
the United States of America, any state thereof or any foreign country
recognized by the United States, and which bank or trust company has capital,
surplus and undivided profits aggregating in excess of $50,000,000 (or the
foreign currency equivalent thereof) and has outstanding debt which is rated "A"
(or such similar equivalent rating) or higher by at least one nationally
recognized statistical rating organization (as defined in Rule 436 under the
Securities Act) or any money-market fund sponsored by a registered broker dealer
or mutual fund distributor; (iii) repurchase obligations with a term of not more
than 30 days for underlying securities of the types described in clause (i)
above entered into with a bank meeting the qualifications described in clause
(ii) above; (iv) investments in commercial paper, maturing not more than 180
days after the date of acquisition, issued by a corporation (other than an
Affiliate of Sterling or Holdings) organized and in existence under the laws of
the United States of America or any foreign country recognized by the United
States of America with a rating at the time as of which any investment therein
is made of "P-l" (or higher) according to Moody's or "A-1" (or higher) according
to S&P; (v) investments in securities with maturities of six months or less from
the date of acquisition issued or fully guaranteed by any state, commonwealth or
territory of the United States of America, or by any political subdivision or
taxing authority thereof, and rated at least "A" by S&P or "A" by Moody's; (vi)
participations (for a tenor of not more than 90 days) in loans to Persons having
short-term credit ratings of at least "A-1" and "P-1" by S&P and Moody's,
respectively; (vii) with respect to any Foreign Subsidiary organized in Canada,
commercial paper of Canadian companies rated R-1 High or the equivalent thereof
by Dominion Bond Rating Services with maturities of less than one year; and
(viii) with respect to Foreign Subsidiaries not organized in Canada, government
obligations of another country whose debt securities are rated by S&P and/or
Moody's "A-1" or "P-1", or the equivalent thereof

                                       14
<PAGE>
 
(if a short-term debt rating is provided by either) or at least "AA" or "AA2",
or the equivalent thereof (if a long-term unsecured debt rating is provided by
either), in each case, with maturities of less than 12 months.

          "Term Loan Provisions" means the provisions of the Credit Agreements
pursuant to which lenders thereunder have committed to make term loans available
to Sterling.

          "TIA" means the Trust Indenture Act of 1939 (15 U.S.C. Sections 77aaa-
77bbbb) as in effect on the date on which this Indenture is qualified under the
TIA.

          "Transfer Restricted Notes" means Definitive Notes and Notes that bear
or are required to bear the legend set forth in Section 2.06(d).

          "Trustee" means the party named as such above until a successor
replaces it in accordance with the applicable provisions of this Indenture, and
thereafter such term shall mean such successor serving hereunder.

          "U.S. Government Obligations" means direct obligations (or
certificates representing an ownership interest in such obligations) of the
United States of America (including any agency or instrumentality thereof) for
the payment of which the full faith and credit of the United States of America
is pledged and which are not callable at the issuer's option.

          "Unrestricted Subsidiary" means (i) any Subsidiary of Sterling that at
the time of determination shall be designated an Unrestricted Subsidiary by the
Board of Directors in the manner provided below and (ii) any Subsidiary of an
Unrestricted Subsidiary. The Board of Directors may designate any Subsidiary of
Sterling (including any newly acquired or newly formed Subsidiary) to be an
Unrestricted Subsidiary unless such Subsidiary or any of its Subsidiaries own
any Capital Stock or Debt of, or holds any Lien on any property of, Sterling or
any other Subsidiary of Sterling that is not a Subsidiary of the Subsidiary to
be so designated; provided, however, that either (A) the Subsidiary to be so
designated has total assets of $1,000 or less, or (B) if such Subsidiary has
assets of greater than $1,000, such designation would be permitted pursuant to
Section 5.05; and provided, further, however, that (1) no Subsidiary of Sterling
that is a Restricted Subsidiary on the Issue Date (other than a Restricted
Subsidiary with total assets of $1,000 or less on the Issue Date) may be
designated an Unrestricted Subsidiary, and (2) no Subsidiary holding, directly
or indirectly, any assets (other than assets totaling $1,000 or less which
constituted the only assets of a Restricted Subsidiary on the Issue Date) held
by Sterling or a Restricted Subsidiary on the Issue Date may be designated an
Unrestricted Subsidiary. The Board of Directors may designate any Unrestricted
Subsidiary to be a Restricted Subsidiary; provided, however, that immediately
after giving effect to such designation (x) if such Unrestricted Subsidiary at
such time has Debt, Sterling could Incur $1.00 of additional Debt pursuant to
Section 5.04(a), and (y) no Default shall have occurred and be continuing. Any
such designation by the Board of Directors shall be by Sterling to the Trustee
by promptly filing with the Trustee a copy of the board resolution giving effect
to such designation and an Officers' Certificate certifying that such
designation complied with the foregoing provisions.

          "Voting Stock" of a corporation means all classes of Capital Stock of
such corporation then outstanding and normally entitled to vote in the election
of directors.

          "Wholly Owned Subsidiary" means a Restricted Subsidiary all the
Capital Stock of which (other than directors' qualifying shares) is owned by
Sterling or another Wholly Owned

                                       15
<PAGE>
 
Subsidiary; provided, however, that a Foreign Subsidiary shall be a Wholly Owned
Subsidiary if more than 90% of the Capital Stock and Voting Stock thereof is
owned by Sterling or another Wholly Owned Subsidiary.

Section 1.02.  Other Definitions.

 
                                              Defined in
            Term                            Article/Section
            -----                           ---------------
 
            "Affiliate Transaction".......     Section 5.08
            "Agent Members"...............     Section 2.01
            "blockage period".............    Section 11.03
            "Change of Control"...........       Article IV
            "covenant defeasance".........     Section 9.01
            "Default Amount"..............     Section 7.02
            "Definitive Notes"............     Section 2.01
            "Event of Default"............     Section 7.01
            "Global Note".................     Section 2.01
            "IAI".........................     Section 2.01
            "legal defeasance"............     Section 9.01
            "Note Register"...............     Section 2.03
            "Notes Payment"...............    Section 11.02
            "parent corporation"..........       Article IV
            "Paying Agent"................     Section 2.03
            "Payment Default".............     Section 7.01
            "Proceeding"..................    Section 11.02
            "Purchase Agreement"..........     Section 2.01
            "QIB".........................     Section 2.01
            "Registrar"...................     Section 2.03
            "Regulation S"................     Section 2.01
            "Restricted Payment"..........     Section 5.05
            "Rule 144A"...................     Section 2.01
            "Senior Nonmonetary Default"..    Section 11.03
            "Senior Payment Default"......    Section 11.03
            "specified corporation".......       Article IV
            "Successor Company"...........     Section 6.01

Section 1.03.  Incorporation by Reference of Trust Indenture Act.

            Whenever this Indenture refers to a provision of the TIA, the
provision is incorporated by reference in and made a part of this Indenture.

            The following TIA terms used in this Indenture have the following
meanings:

             (i)  "indenture securities" means the Notes;

            (ii)  "indenture security holder" means a Noteholder;

           (iii)  "indenture to be qualified" means this Indenture;

                                       16
<PAGE>
 
            (iv)  "indenture trustee" or "institutional trustee" means the
Trustee;

             (v)  "obligor" upon the Notes means Sterling and any successor
obligor upon the Notes.

            All other terms used in this Indenture that are (i) defined by the
TIA; (ii) defined by TIA reference to another statute; or (iii) defined by SEC
rule under the TIA have the meanings so assigned to them.

Section 1.04.  Rules of Construction.

            Unless the context otherwise requires:

             (i)  a term has the meaning assigned to it;

            (ii)  an accounting term not otherwise defined has the meaning
assigned to it in accordance with GAAP;

           (iii)  the word "or" shall not be deemed to be exclusive;

            (iv)  words in the singular include the plural, and words in the
plural include the singular; and

             (v)  provisions apply to successive events and transactions.


                                   ARTICLE II

                                   THE NOTES

Section 2.01.  Form and Dating.

          The Initial Notes and the Trustee's certificate of authentication
shall be substantially in the form of Exhibit A hereto, the terms of which are
incorporated in and made a part of this Indenture.  The Exchange Notes, the
Private Exchange Notes and the Trustee's certificate of authentication shall be
substantially in the form of Exhibit B, which is hereby incorporated by
reference and expressly made a part of this Indenture.  The Notes may have such
notations, legends or endorsements approved as to form by Sterling and required,
as applicable, by law, stock exchange rule, agreements to which Sterling is
subject and/or usage.  Each Note shall be dated the date of its authentication.
The Notes shall be issuable only in denominations of $1,000 and integral
multiples thereof.  The terms of the Notes set forth in Exhibit A and Exhibit B
are part of the terms of this Indenture.

          The Initial Notes are being offered and sold by Sterling pursuant to a
Purchase Agreement, dated April 1, 1997, among Sterling and the Initial
Purchasers (the "Purchase Agreement").

          (a) Global Notes.  Initial Notes offered and sold to a "qualified
institutional buyer" (as defined in Rule 144A under the Securities Act) (a
"QIB") in reliance on Rule 144A under the Securities Act ("Rule 144A") or in
reliance on Regulation S under the Securities Act

                                       17
<PAGE>
 
("Regulation S"), in each case as provided in the Purchase Agreement, shall be
issued initially in the form of one permanent global Note in definitive, fully
registered form without interest coupons (the "Global Note") with the global
Note legend and restricted Note legend set forth in Exhibit A hereto, which
shall be deposited on behalf of the purchasers of the Initial Notes represented
thereby with the Trustee, as custodian for the Depository (or with such other
custodian as the Depository may direct), and registered in the name of the
Depository or a nominee of the Depository, duly executed by Sterling and
authenticated by the Trustee as hereinafter provided.  The aggregate principal
amount of the Global Note may from time to time be increased or decreased by
adjustments made on the records of the Trustee and the Depository or its nominee
as hereinafter provided.

          (b) Book-Entry Provisions.  This Section 2.01(b) shall apply only to
the Global Note deposited with or on behalf of the Depository.

          Sterling shall execute and the Trustee shall, in accordance with this
Section 2.01(b), authenticate and deliver initially one Global Note that (i)
shall be registered in the name of the Depository or the nominee of the
Depository and (ii) shall be delivered by the Trustee to the Depository or
pursuant to the Depository's instructions or held by the Trustee as custodian
for the Depository.

          Members of, or participants in, the Depository ("Agent Members") shall
have no rights under this Indenture with respect to the Global Note held on
their behalf by the Depository or by the Trustee as the custodian of the
Depository or under such Global Note, and the Depository may be treated by
Sterling, the Trustee and any agent of Sterling or the Trustee as the absolute
owner of such Global Note for all purposes whatsoever.  Notwithstanding the
foregoing, nothing herein shall prevent the Sterling, the Trustee or any agent
of Sterling or the Trustee from giving effect to any written certification,
proxy or other authorization furnished by the Depository or impair, as between
the Depository and its Agent Members, the operation of customary practices of
such Depository governing the exercise of the rights of a holder of a beneficial
interest in the Global Note.

          (c) Certificated Notes.  Except as provided in this Section or Section
2.06 or 2.09, owners of beneficial interests in the Global Note will not be
entitled to receive physical delivery of certificated Notes.  Purchasers of
Initial Notes who are institutional "accredited investors" as described in Rule
501(a)(1), (2), (3) or (7) under the Securities Act (each an "IAI") and who are
not QIBs and did not purchase Initial Notes sold in reliance on Regulation S
will receive certificated Initial Notes bearing the restricted securities legend
set forth in Exhibit A hereto (such securities as held by an IAI are herein
referred to as "Definitive Notes"); provided, however, that upon transfer of
such certificated Initial Notes to a QIB or in reliance on Regulation S such
certificated Initial Notes will, unless the Global Note has previously been
exchanged, be exchanged for an interest in the Global Note pursuant to the
provisions of Section 2.06.  Definitive Notes will bear the restricted
securities legend set forth on Exhibit A unless removed in accordance with
Section 2.06(d).

                                       18
<PAGE>
 
Section 2.02.  Execution and Authentication.

           Two Officers of Sterling shall sign the Notes for Sterling by manual
or facsimile signature.

          If an Officer whose signature is on a Note no longer holds that office
at the time such Note is authenticated such Note shall be valid nevertheless.

          A Note shall not be valid until authenticated by the manual signature
of the Trustee.  The signature of the Trustee shall be conclusive evidence that
a Note has been authenticated in accordance with the terms of this Indenture.

          The Trustee, upon a written order of Sterling signed by two Officers
of Sterling, shall authenticate and deliver (1) Initial Notes for original issue
in an aggregate principal amount of $150,000,000, and (2) Exchange Notes or
Private Exchange Notes for issue only in a Registered Exchange Offer or a
Private Exchange, respectively, pursuant to the Registration Rights Agreement,
for a like principal amount of Initial Notes, in each case upon a written order
of Sterling signed by two Officers or by an Officer and either an Assistant
Treasurer or an Assistant Secretary of Sterling.  Such order shall specify the
amount of the Notes to be authenticated, the date on which the original issue of
Notes is to be authenticated and whether the Notes are to be Initial Notes,
Exchange Notes or Private Exchange Notes.  The aggregate principal amount of
Notes outstanding at any time may not exceed $150,000,000 except as provided in
Section 2.07.

          The Trustee may appoint an authenticating agent acceptable to Sterling
to authenticate the Notes.  Unless limited by the terms of such appointment, any
such authenticating agent may authenticate the Notes whenever the Trustee may do
so.  Each reference in this Indenture to authentication by the Trustee includes
authentication by such authenticating agent of the Trustee.  An authenticating
agent has the same rights as an Agent to deal with Sterling or an Affiliate of
Sterling.

Section 2.03.  Registrar and Paying Agent.

          Sterling shall maintain (i) an office or agency where the Notes may be
presented for registration of transfer or for exchange (including any co-
registrar, the "Registrar"); and (ii) an office or agency where the Notes may be
presented for payment ("Paying Agent").  The Registrar shall keep a register of
the Holders of Notes and of the transfer and exchange of such Notes (the "Note
Register").  Sterling may appoint one or more co-registrars and one or more
additional paying agents.  The term "Paying Agent" shall include any such
additional paying agent.  Sterling may change any Paying Agent, Registrar or co-
registrar without prior notice to any Holder of a Note.  Sterling shall notify
the Trustee and the Trustee shall notify the Holders of the Notes of the name
and address of any Agent not a party to this Indenture.  Sterling or any of its
domestically incorporated Wholly Owned Subsidiaries may act as Paying Agent,
Registrar or co-registrar.  Sterling shall enter into an appropriate agency
agreement with any Agent not a party to this Indenture, which shall incorporate
the provisions of the TIA.  Any such agency agreement shall implement the
provisions of this Indenture that relate to such Agent.  If Sterling fails to
maintain a Registrar or Paying Agent, or fails to give the foregoing notice, the
Trustee shall act as such, as appropriate, and shall be entitled to appropriate
compensation in accordance with Section 8.07.

                                       19
<PAGE>
 
          Sterling initially appoints the Trustee as Registrar, Paying Agent and
agent for service of notices and demands in connection with the Notes.

Section 2.04.  Paying Agent to Hold Money In Trust.

          On or prior to each due date of the principal of, premium, if any, and
interest on any Note, Sterling shall deposit with the Paying Agent a sum
sufficient to pay such principal, premium, if any, and interest when so becoming
due.  Sterling shall require each Paying Agent (other than the Trustee) to agree
in writing that the Paying Agent shall hold in trust for the benefit of the
Holders of the Notes or the Trustee all money held by the Paying Agent for the
payment of principal of, premium, if any, and interest on the Notes, and shall
notify the Trustee of any Default by Sterling in making any such payment.  While
any such Default continues, the Trustee may require a Paying Agent to pay all
money held by it to the Trustee.  Sterling at any time may require a Paying
Agent to pay all money held by it to the Trustee.  Upon payment over to the
Trustee, the Paying Agent (if other than Sterling) shall have no further
liability for the money delivered to the Trustee.  If Sterling acts as Paying
Agent, it shall segregate and hold in a separate trust fund for the benefit of
the Holders of the Notes all money held by it as Paying Agent.

Section 2.05.  Lists of Holders of Notes.

          The Trustee shall preserve in as current a form as is reasonably
practicable the most recent list available to it of the names and addresses of
the Holders of Notes.  If the Trustee is not the Registrar, Sterling shall
furnish to the Trustee at least three Business Days before each interest payment
date and at such other times as the Trustee may request in writing a list in
such form and as of such date as the Trustee may reasonably require of the names
and addresses of the Holders of Notes, including the aggregate principal amount
of Notes held by each such Holder of Notes.

Section 2.06.  Transfer and Exchange.

          (a)  Transfer and Exchange of Definitive Notes.  Definitive Notes
shall be issued in registered form and shall be transferable only upon the
surrender of Definitive Notes for registration of transfer.  When Definitive
Notes are presented to the Registrar with a request to register the transfer or
to exchange them for an equal principal amount of Definitive Notes of other
denominations, the Registrar shall register the transfer or make the exchange if
its requirements for such transactions are met; provided, however, that any
Definitive Notes presented or surrendered for registration of transfer or
exchange:

           (i)  shall be duly endorsed or accompanied by a written instruction
    of transfer in form satisfactory to the Registrar and the Trustee duly
    executed by the Holder thereof or by his attorney duly authorized in
    writing; and

           (ii) are being transferred or exchanged pursuant to an effective
    registration statement under the Securities Act, pursuant to Section 2.06(b)
    or pursuant to clause (A), (B) or (C) below, and are accompanied by the
    following additional information and documents, as applicable:

                (A) if such Definitive Notes are being delivered to the
           Registrar by a Holder for registration in the name of such Holder,
           without transfer, a

                                       20
<PAGE>
 
           certification from such Holder to that effect (in the form set forth
           on the reverse of the Note); or

                (B) if such Definitive Notes are being transferred to Sterling a
           certification to that effect (in the form set forth on the reverse of
           the Note); or

                (C) if such Definitive Notes are being transferred pursuant to
           an exemption from registration in accordance with Rule 144 or
           Regulation S under the Securities Act:  (i) a certificate to that
           effect (in the form set forth on the reverse of the Note), and (ii)
           if Sterling or Registrar so requests, evidence reasonably
           satisfactory to them as to the compliance with the restrictions set
           forth in the legend set forth in Section 2.06(d)(i).

          (b) Restrictions on Transfer of a Definitive Note for a Beneficial
Interest in the Global Note.  A Definitive Note may not be exchanged for a
beneficial interest in the Global Note except upon satisfaction of the
requirements set forth below.  Upon receipt by the Trustee of a Definitive Note,
duly endorsed or accompanied by appropriate instruments of transfer, in form
satisfactory to the Trustee, together with:

           (i) certification, in the form set forth on the reverse of the Note,
    that such Definitive Note is being transferred to a QIB in accordance with
    Rule 144A under the Securities Act or to a non-U.S. person in accordance
    with Rule 904 under the Securities Act; and

           (ii) written instructions directing the Trustee to make, or to direct
    the Notes Custodian to make, an adjustment on its books and records with
    respect to such Global Note to reflect an increase in the aggregate
    principal amount of the Notes represented by the Global Note,

then the Trustee shall cancel such Definitive Note and cause, or direct the
Notes Custodian to cause, in accordance with the standing instructions and
procedures existing between the Depository and the Notes Custodian, the
aggregate principal amount of Notes represented by the Global Note to be
increased accordingly.  If no Global Note is then outstanding, Sterling shall
issue and the Trustee shall authenticate, upon written order of Sterling in the
form of an Officers' Certificate, a new Global Note in the appropriate principal
amount.

           (c) Transfer and Exchange of Global Notes.

            (i)  The transfer and exchange of the Global Note or beneficial
    interests therein shall be effected through the Depository, in accordance
    with this Indenture (including applicable restrictions on transfer set forth
    herein, if any) and the procedures of the Depository therefor, if
    applicable.

            (ii)  Notwithstanding any other provisions of this Indenture (other
    than the provisions set forth in Section 2.09), the Global Note may not be
    transferred as a whole except by the Depository to a nominee of the
    Depository or by a nominee of the Depository to the Depository or another
    nominee of the Depository or by the Depository or any such nominee to a
    successor Depository or a nominee of such successor Depository.

                                       21
<PAGE>
 
           (iii)  In the event that the Global Note is exchanged for Notes in
    definitive form pursuant to Section 2.09, prior to the consummation of a
    Registered Exchange Offer or the effectiveness of a Shelf Registration
    Statement with respect to such Notes, such Notes may be exchanged only in
    accordance with such procedures as are substantially consistent with the
    provisions of this Section 2.06 (including the certification requirements
    set forth on the reverse of the Initial Notes intended to ensure that such
    transfers comply with Rule 144A or Regulation S, as the case may be) and
    such other procedures as may from time to time be adopted by Sterling.

           (d)  Legend.

            (i)  Except as permitted by the following paragraphs (ii) and (iii)
    each Note certificate evidencing the Global Note and the Definitive Notes
    (and all Notes issued in exchange therefor or substitution thereof) shall
    bear a legend in substantially the following form:

           "THIS NOTE (OR ITS PREDECESSOR) WAS ORIGINALLY ISSUED IN A
    TRANSACTION EXEMPT FROM REGISTRATION UNDER THE UNITED STATES SECURITIES ACT
    OF 1933, AS AMENDED (THE "SECURITIES ACT"), AND UNDER APPLICABLE STATE
    SECURITIES LAWS, AND THIS NOTE MAY NOT BE OFFERED, SOLD OR OTHERWISE
    TRANSFERRED IN THE ABSENCE OF SUCH REGISTRATION OR AN APPLICABLE EXEMPTION
    THEREFROM.  EACH PURCHASER OF THIS NOTE IS HEREBY NOTIFIED THAT THE SELLER
    OF THIS NOTE MAY BE RELYING ON THE EXEMPTION FROM THE PROVISIONS OF SECTION
    5 OF THE SECURITIES ACT PROVIDED BY RULE 144A THEREUNDER.

           THE HOLDER OF THIS NOTE AGREES FOR THE BENEFIT OF THE COMPANY THAT
    (A) THIS NOTE MAY BE OFFERED, RESOLD, PLEDGED OR OTHERWISE TRANSFERRED, ONLY
    (i) TO A PERSON WHOM THE SELLER REASONABLY BELIEVES IS A QUALIFIED
    INSTITUTIONAL BUYER (AS DEFINED IN RULE 144A UNDER THE SECURITIES ACT) IN A
    TRANSACTION MEETING THE REQUIREMENTS OF RULE 144A, (ii) IN AN OFFSHORE
    TRANSACTION IN ACCORDANCE WITH RULE 904 UNDER THE SECURITIES ACT, (iii)
    PURSUANT TO AN EXEMPTION FROM REGISTRATION UNDER THE SECURITIES ACT PROVIDED
    BY RULE 144 THEREUNDER (IF AVAILABLE) OR (iv) PURSUANT TO AN EFFECTIVE
    REGISTRATION STATEMENT UNDER THE SECURITIES ACT, IN EACH OF CASES (i)
    THROUGH (iv) IN ACCORDANCE WITH ANY APPLICABLE SECURITIES LAWS OF ANY STATE
    OF THE UNITED STATES, AND (B) THE HOLDER WILL, AND EACH SUBSEQUENT HOLDER IS
    REQUIRED TO, NOTIFY ANY PURCHASER OF THIS NOTE FROM IT OF THE RESALE
    RESTRICTIONS REFERRED TO IN (A) ABOVE."

                When set forth on a Definitive Note, the legend will include the
following additional words:

           "IN CONNECTION WITH ANY TRANSFER, THE HOLDER WILL DELIVER TO THE
    REGISTRAR AND TRANSFER AGENT SUCH CERTIFICATES AND OTHER INFORMATION AS SUCH
    TRANSFER AGENT MAY REASONABLY REQUIRE TO CONFIRM THAT THE TRANSFER COMPLIES
    WITH THE FOREGOING RESTRICTIONS."

                                       22
<PAGE>
 
      (ii)  Upon any sale or transfer of a Transfer Restricted Note (including
    any Transfer Restricted Note represented by the Global Note) pursuant to
    Rule 144 under the Securities Act:

                (A)  in the case of any Transfer Restricted Note that is a
           Definitive Note, the Registrar shall permit the Holder thereof to
           exchange such Transfer Restricted Note for a certificated Note that
           does not bear the legend set forth above and rescind any restriction
           on the transfer of such Transfer Restricted Note;

                (B)  in the case of any Transfer Restricted Note that is
           represented by the Global Note, the Registrar shall permit the Holder
           thereof to request the issuance of a certificated Note that does not
           bear the legend set forth above and rescind any restrictions on the
           transfer of such Transfer Restricted Note, if the sale or exchange
           was made in reliance on Rule 144 and the Holder certifies to that
           effect in writing to the Registrar (such certification to be in the
           form set forth on the reverse of the Note).

           (iii)  After a transfer of any Initial Notes or Private Exchange
    Notes during the period of the effectiveness of a Shelf Registration
    Statement with respect to such Initial Notes or Private Exchange Notes, as
    the case may be, all requirements pertaining to legends on such Initial Note
    or such Private Exchange Note will cease to apply, the requirements
    requiring any such Initial Note or such Private Exchange Note issued to
    certain Holders be issued in global form will cease to apply, and a
    certificated Initial Note or Private Exchange Note without legends will be
    available to the transferee of the Holder of such Initial Notes or Private
    Exchange Notes or upon receipt of directions to transfer such Holder's
    interest in the Global Note, as applicable.

            (iv)  Upon the consummation of a Registered Exchange Offer with
    respect to the Initial Notes pursuant to which Holders of such Initial Notes
    are offered Exchange Notes in exchange for their Initial Notes, all
    requirements pertaining to such Initial Notes that Initial Notes issued to
    certain Holders be issued in global form will cease to apply and
    certificated Initial Notes with the restricted securities legend set forth
    in Exhibit A hereto will be available to Holders of such Initial Notes that
    do not exchange their Initial Notes and Exchange Notes in certificated form
    will be available to Holders that exchange such Initial Notes in such
    Registered Exchange Offer.

            (v)  Upon the consummation of a Private Exchange with respect to the
    Initial Notes pursuant to which Holders of such Initial Notes are offered
    Private Exchange Notes in exchange for their Initial Notes, all requirements
    pertaining to such Initial Notes that Initial Notes issued to certain
    holders be issued in global form will still apply, and Private Exchange
    Notes in global form with the restricted securities legend set forth in
    Exhibit A hereto will be available to Holders that exchange such Initial
    Notes in such Private Exchange.

          (e) Cancellation or Adjustment of Global Note.  At such time as all
beneficial interests in the Global Note have either been exchanged for
certificated Notes, redeemed, repurchased or canceled, such Global Note shall be
returned to the Depository for cancellation or retained and canceled by the
Trustee.  At any time prior to such cancellation, if any beneficial interest in
the Global Note is exchanged for certificated Notes, redeemed, repurchased or

                                       23
<PAGE>
 
canceled, the principal amount of Notes represented by such Global Note shall be
reduced and an adjustment shall be made by the Trustee or the Notes Custodian to
reflect such reduction on the books and records of the Notes Custodian for such
Global Note with respect to such Global Note.

           (f) Obligations with Respect to Transfers and Exchanges of Notes.

                (i)   To permit registration of transfers and exchanges,
           Sterling shall execute and the Trustee shall authenticate
           certificated Notes, Definitive Notes and the Global Note at the
           Registrar's or co-registrar's request.

                (ii)  Sterling may require payment of a sum sufficient to pay
           all taxes, assessments or other governmental charges in connection
           with any transfer or exchange pursuant to this Section 2.06.

              (iii)  Sterling shall not be required to make and the Registrar or
           co-registrar need not register transfers or exchanges of certificated
           or Definitive Notes selected for redemption (except, in the case of
           any Definitive Note to be redeemed in part, the portion thereof not
           to be redeemed), or any Notes for a period of 15 days before a
           selection of Notes to be redeemed or 15 days before an interest
           payment date.

                (iv)  Prior to the due presentation for registration of transfer
           of any Note, Sterling, the Trustee, the Paying Agent, the Registrar
           or any co-registrar may deem and treat the person in whose name a
           Note is registered as the absolute owner of such Note for the purpose
           of receiving payment of principal of and interest on such Note and
           for all other purposes whatsoever, whether or not such Note is
           overdue, and none of Sterling, the Trustee, the Paying Agent, the
           Registrar or any co-registrar shall be affected by notice to the
           contrary.

                (v)  All Notes issued upon any transfer or exchange pursuant to
           the terms of this Indenture will evidence the same debt and will be
           entitled to the same benefits under this Indenture as the Notes
           surrendered upon such transfer or exchange.

           (g)  No Obligation of the Trustee.

                (i)  The Trustee shall have no responsibility or obligation to
           any beneficial owner in the Global Note, a member of, or a
           participant in the Depository or other Person with respect to the
           accuracy of the records of the Depository or its nominee or of any
           participant or member thereof, with respect to any ownership interest
           in the Notes or with respect to the delivery to any participant,
           member, beneficial owner or other Person (other than the Depository)
           of any notice (including any notice of redemption) or the payment of
           any amount, under or with respect to such Notes.  All notices and
           communications to be given to the Holders and all payments to be made
           to Holders under the Notes shall be given or made only to or upon the
           order of the registered Holders (which shall be the Depository or its
           nominee in the case of the Global Note).  The rights of beneficial
           owners in the Global Note shall be exercised only through the
           Depository subject to the applicable rules and procedures of the
           Depository.

                                       24
<PAGE>
 
           The Trustee may rely and shall be fully protected in relying upon
           information furnished by the Depository with respect to its members,
           participants and any beneficial owners.

                (ii)  The Trustee shall have no obligation or duty to monitor,
           determine or inquire as to compliance with any restrictions on
           transfer imposed under this Indenture or under applicable law with
           respect to any transfer of any interest in any Note (including any
           transfers between or among Depository participants, members or
           beneficial owners in the Global Note) other than to make any required
           delivery of such certificates and other documentation or evidence as
           are expressly required by, and to do so if and when expressly
           required by, the terms of this Indenture, and to examine the same to
           determine substantial compliance as to form with the express
           requirements hereof.

Section 2.07.  Replacement Notes.

          If any mutilated Note is surrendered to the Trustee, or Sterling and
the Trustee receive evidence to their satisfaction of the destruction, loss or
theft of any Note, Sterling shall issue and the Trustee shall authenticate a
replacement Note if Sterling's and the Trustee's reasonable requirements for the
replacements of Notes are met.  If required by the Trustee or Sterling, an
indemnity bond shall be supplied by the Holder that is sufficient in the
judgment of the Trustee and Sterling to protect Sterling, the Trustee, any Agent
or any authenticating agent from any loss which any of them may suffer if a Note
is replaced.

           Every replacement Note shall be an obligation of Sterling.

Section 2.08.  Outstanding Notes.

          The Notes outstanding at any time are all the Notes authenticated by
the Trustee, except for those canceled by it, those delivered to it for
cancellation and those described in this Section 2.08 as not outstanding.  A
Note does not cease to be outstanding because Sterling, a Subsidiary of Sterling
or an Affiliate of Sterling holds such Note.

          If a Note is replaced pursuant to Section 2.07, it shall cease to be
outstanding unless the Trustee receives proof satisfactory to it that such
replaced Note is held by a bona fide purchaser.  A mutilated Note ceases to be
outstanding upon surrender of such Note and replacement thereof pursuant to
Section 2.07.

          If the Paying Agent segregates and holds in trust, in accordance with
this Indenture, on a redemption date or maturity date money sufficient to pay
all principal and interest payable on that date with respect to the Notes (or
portions thereof) to be redeemed or maturing, as the case may be, and the Paying
Agent is not prohibited from paying such money to the Holders of Notes on that
date pursuant to the terms of this Indenture, then on and after that date such
Notes (or portions thereof) shall cease to be outstanding and interest thereon
shall cease to accrue.

                                       25
<PAGE>
 
Section 2.09.  Temporary Notes and Certificated Notes.

          (a) Until definitive Notes are ready for delivery, Sterling may
prepare and the Trustee shall authenticate temporary Notes.  Temporary Notes
shall be substantially in the form of definitive Notes but may have such
variations as Sterling and the Trustee consider appropriate for temporary Notes.
Without unreasonable delay, Sterling shall prepare and the Trustee shall
authenticate definitive Notes in exchange for temporary Notes.  Until such
exchange, temporary Notes shall be entitled to the same rights, benefits and
privileges as definitive Notes.

          (b)  The Global Note deposited with the Depository or with the Trustee
as custodian for the Depository pursuant to Section 2.01 shall be transferred to
the beneficial owners thereof in the form of certificated Notes in an aggregate
principal amount equal to the principal amount of such Global Note, in exchange
for such Global Note, only if such transfer complies with Section 2.06 and (i)
the Depository notifies Sterling that it is unwilling or unable to continue as
Depository for such Global Note or if at any time such Depository ceases to be a
"clearing agency" registered under the Exchange Act and a successor depository
is not appointed by Sterling within 90 days of such notice, (ii) an Event of
Default has occurred and is continuing or (iii) Sterling, in its sole
discretion, notifies the Trustee in writing that it elects to cause the issuance
of certificated Notes under this Indenture.

          (c)  Any Global Note that is transferable to the beneficial owners
thereof pursuant to this Section shall be surrendered by the Depository to the
Trustee to be so transferred, in whole or from time to time in part, without
charge, and the Trustee shall authenticate and deliver, upon such transfer of
each portion of such Global Note, an equal aggregate principal amount of Initial
Notes of authorized denominations.  Any portion of the Global Note transferred
pursuant to this Section shall be executed, authenticated and delivered only in
denominations of $1,000 and any integral multiple thereof and registered in such
names as the Depository shall direct.  Any Initial Note delivered in exchange
for an interest in the Global Note shall, except as otherwise provided by
Section 2.06(d), bear the restricted securities legend set forth in Exhibit A
hereto.

          (d)  Subject to the provisions of Section 2.09(c), the registered
Holder of the Global Note may grant proxies and otherwise authorize any person,
including agent members, participants and persons that may hold interests
through agent members, to take any action which a Holder is entitled to take
under this Indenture or the Notes.

          (e)  In the event of the occurrence of any of the events specified in
Section 2.09(b), Sterling will promptly make available to the Trustee a
reasonable supply of certificated Notes in definitive, fully registered form
without interest coupons.

Section 2.10.  Cancellation.

          Sterling at any time may deliver Notes to the Trustee for
cancellation.  The Registrar and the Paying Agent shall forward to the Trustee
any Notes surrendered to them for registration of transfer, exchange or payment.
The Trustee and no one else shall cancel all Notes surrendered for registration
of transfer, exchange, payment, replacement or cancellation, and shall destroy
such canceled Notes (subject to the record retention requirement of the Exchange
Act), and, upon the request of Sterling, deliver a certificate of such
destruction to Sterling, unless Sterling directs canceled Notes to be returned
to them.  Sterling may not issue new Notes to replace Notes it has redeemed,
paid or delivered to the Trustee for cancellation.

                                       26
<PAGE>
 
Section 2.11.  Defaulted Interest.

          If Sterling defaults in a payment of interest on the Notes, Sterling
shall pay such defaulted interest in any lawful manner.  Sterling may pay such
defaulted interest to the Persons who are Holders of the Notes on a subsequent
special record date, which date shall be at the earliest practicable date but in
all events at least five Business Days prior to the payment date, in each case
at the rate provided in the Notes.  Sterling shall fix or cause to be fixed any
such special record date and payment date, and, at least 15 days prior to the
special record date, Sterling shall mail or cause to be mailed to each Holder of
a Note a notice that states such special record date, such related payment date
and the amount of any such defaulted interest to be paid to Holders of the
Notes.

Section 2.12.  CUSIP Number.

          Sterling in issuing the Notes may use a "CUSIP" number, and, if
Sterling shall do so, the Trustee shall use such CUSIP number in notices of
redemption or exchange as a convenience to Holders; provided, however, that any
such notice may state that no representation is made as to the correctness or
accuracy of the CUSIP number printed in such notice or on the Notes and that
reliance may be placed only on the other identification numbers printed on the
Notes.  Sterling will notify the Trustee of any change in a CUSIP number.


                                  ARTICLE III

                                   REDEMPTION

Section 3.01.  Notices to Trustee.

          If Sterling elects to redeem Notes pursuant to paragraph 5 of the
Notes, Sterling shall notify the Trustee in writing of the redemption date, the
principal amount of Notes to be redeemed and the paragraph of the Notes pursuant
to which the redemption will occur.

          Sterling shall give each notice to the Trustee provided for in this
Section 3.01 at least 60 days before the redemption date unless the Trustee
consents to a shorter period.  Such notice shall be accompanied by an Officers'
Certificate and an Opinion of Counsel from Sterling to the effect that such
redemption will comply with the conditions herein.  If fewer than all of the
Notes are to be redeemed, the record date relating to such redemption shall be
selected by Sterling and given to the Trustee, which record date shall not be
less than 15 days after the date of notice to the Trustee.

Section 3.02.  Selection of Notes to be Redeemed.

          If fewer than all the Notes are to be redeemed, the Trustee shall
select the Notes to be redeemed pro rata, unless otherwise required by law or
regulation (including regulation of The Depository Trust Company).  The Trustee
shall make the selection from outstanding Notes not previously called for
redemption.  The Trustee may select for redemption portions of the principal of
Notes that have denominations larger than $1,000.  Notes and portions of Notes
the Trustee selects shall be in amounts of $1,000 or a whole multiple of $1,000.
Provisions of this Indenture that apply to Notes called for redemption also
apply to portions of Notes called for

                                       27
<PAGE>
 
redemption.  The Trustee shall notify Sterling promptly of the Notes or portions
of Notes to be redeemed.

Section 3.03.  Notice of Redemption.

          Sterling shall at least 30 days but not more than 60 days before a
redemption date mail or cause to be mailed, by first class-mail, a notice of
redemption to each Holder of Notes of which are to be redeemed.

           The notice shall identify the Notes to be redeemed and shall state:

           (i)  the redemption date;

           (ii) the redemption price,

          (iii) if any Note is being redeemed in part, the portion of the
principal amount of such Note to be redeemed, and that after the redemption date
upon surrender of such Note, a new Note or Notes in principal amount equal to
the unredeemed portion shall be issued;

           (iv) the name and address of the Paying Agent;

           (v) that Notes called for redemption must be surrendered to the
Paying Agent to collect the redemption price;

          (vi) that, unless Sterling defaults in making such redemption payment
or the Paying Agent is prohibited from making such payment pursuant to the terms
of this Indenture, interest on Notes called for redemption ceases to accrue on
and after the redemption date;

          (vii) the paragraph of the Notes and/or the Section of this Indenture
pursuant to which the Notes called for redemption are being redeemed; and

          (viii)  that no representation is made as to the correctness or
accuracy of the CUSIP number, if any, listed in such notice or printed on the
Notes.

          At Sterling's request, at least five Business Days prior to the date
upon which such notice is to be mailed unless the Trustee consents to a shorter
period, the Trustee shall give the notice of redemption in Sterling's name and
at Sterling's expense. In such event, Sterling shall provide the Trustee with
the information required by this Section 3.03.

Section 3.04.  Effect of Notice of Redemption.

          Once notice of redemption is mailed in accordance with Section 3.03,
Notes called for redemption shall become due and payable on the redemption date
and at the redemption price stated in such notice of redemption.  Upon surrender
to the Paying Agent, such Notes shall be paid at the redemption price stated in
such notice of redemption, plus accrued interest to the redemption date.
Failure to give notice to a Holder of a Note or any defect in any notice shall
not affect the validity of any notice to any other Holder of a Note.

                                       28
<PAGE>
 
Section 3.05.  Deposit of Redemption Price.

          On or prior to any redemption date, Sterling shall deposit with the
Paying Agent (or, if Sterling or a Subsidiary is the Paying Agent, shall
segregate and hold in trust) money sufficient to pay the redemption price of and
accrued interest on all Notes to be redeemed on that date.  The Trustee or the
Paying Agent shall promptly return to Sterling any money deposited with the
Trustee or the Paying Agent by Sterling in excess of the amounts necessary to
pay the redemption price of, and accrued interest on, all Notes to be redeemed
on that date other than Notes or portions of Notes called for redemption which
have been delivered by Sterling to the Trustee for cancellation.

Section 3.06.  Notes Redeemed in Part.

          Upon surrender of a Note that is redeemed in part, Sterling shall
issue and the Trustee shall authenticate for the Holder of the Notes (at the
expense of Sterling) a new Note equal in principal amount to the unredeemed
portion of the Note surrendered.


                                   ARTICLE IV

                               CHANGE OF CONTROL

          (a) Upon the occurrence of a Change of Control (as defined below),
each Holder of a Note shall have the right to require Sterling to repurchase
such Holder's Notes at a purchase price in cash equal to 101% of the principal
amount thereof plus accrued and unpaid interest (if any) to the date of
repurchase (subject to the right of holders of record on the relevant record
date to receive interest due on the relevant interest payment date).

           (b) The occurrence of any of the following events shall constitute a
"Change of Control" under this Indenture:

           (i) any "person" (as such term is used in Sections 13(d) and 14(d) of
    the Exchange Act), other than one or more Permitted Holders, is or becomes
    the beneficial owner (as defined in Rules 13d-3 and 13d-5 under the Exchange
    Act except that a Person shall be deemed to have "beneficial ownership" of
    all shares that any such Person has the right to acquire, whether such right
    is exercisable immediately or only after the passage of time), directly or
    indirectly, of more than 35% of the total voting power of the Voting Stock
    of Holdings; provided that the Permitted Holders "beneficially own" (as
    defined above), directly or indirectly, in the aggregate a lesser percentage
    of the total voting power of the Voting Stock of Holdings than such other
    Person and do not have the right or ability by voting power, contract or
    otherwise to elect or designate for election a majority of the Board of
    Directors of Holdings (for the purposes of this clause (i), (A) such other
    Person shall be deemed to beneficially own any Voting Stock of a corporation
    (the "specified corporation") held by any other corporation (the "parent
    corporation"), if such other Person "beneficially owns" (as defined above),
    directly or indirectly, more than 35% of the voting power of the Voting
    Stock of such parent corporation and the Permitted Holders "beneficially
    own" (as defined above), directly or indirectly, in the aggregate a lesser
    percentage of the voting power of the Voting Stock of such parent
    corporation and do not have the right or ability by voting power, contract
    or otherwise to elect or designate for election a majority of the Board of
    Directors of such parent corporation, and (B) the

                                       29
<PAGE>
 
    Permitted Holders shall be deemed to beneficially own any Voting Stock of a
    specified corporation held by any parent corporation so long as the
    Permitted Holders beneficially own (as so defined), directly or indirectly,
    in the aggregate a majority of the voting power of the Voting Stock of the
    parent corporation);

           (ii) during any period of two consecutive years, individuals who at
    the beginning of such period constituted the Board of Directors of Holdings
    or Sterling (together with any new directors whose election by such Board of
    Directors or whose nomination for election by the shareholders of Holdings
    or Sterling, as the case may be, was approved by a majority of the directors
    of Holdings or Sterling, as the case may be, then still in office who were
    either directors at the beginning of such period or whose election or
    nomination for election was previously so approved) cease for any reason to
    constitute a majority of the Board of Directors of Holdings or Sterling, as
    the case may be, then in office;

           (iii)  the merger or consolidation of Holdings or Sterling with or
    into another Person or the merger of another Person (other than a Permitted
    Holder) with or into Holdings or Sterling, or the sale or transfer in one or
    a series of transactions of all or substantially all the assets of Holdings
    or Sterling to another Person (other than a Permitted Holder), and, in the
    case only of any such merger or consolidation, the securities of Holdings or
    Sterling that are outstanding immediately prior to such transaction and
    which represent 100% of the aggregate voting power of the Voting Stock of
    Holdings or Sterling are changed into or exchanged for cash, securities or
    property, unless pursuant to such transaction such securities are changed
    into or exchanged for, in addition to any other consideration, securities of
    the surviving corporation that represent immediately after such transaction,
    at least a majority of the aggregate voting power of the Voting Stock of the
    surviving corporation; or

           (iv) for so long as a holding company ownership structure is
    maintained over Sterling, Holdings shall hold less than a majority of the
    Capital Stock of Sterling (other than Preferred Stock of Sterling issued in
    accordance with the terms of this Indenture) or less than a majority of the
    Voting Stock of Sterling.

          (c) Within 30 days following any Change of Control, Sterling shall
mail a notice to each Holder with a copy to the Trustee stating:  (i) that a
Change of Control has occurred and that such Holder has the right to require
Sterling to purchase such Holder's Notes at a purchase price in cash equal to
101% of the principal amount thereof plus accrued and unpaid interest, if any,
to the date of purchase (subject to the right of holders of record on the
relevant record date to receive interest on the relevant interest payment date);
(ii) the material circumstances and facts regarding such Change of Control
(including information with respect to pro forma historical income, cash flow
and capitalization, each after giving effect to such Change of Control); (iii)
the repurchase date (which shall be no earlier than 30 days nor later than 60
days from the date such notice is mailed in the event of a Change of Control);
and (iv) the instructions determined by Sterling, consistent with the covenant
described hereunder, that a Holder must follow in order to have its Notes
purchased.

          (d) Sterling shall comply, to the extent applicable, with the
requirements of Section 14(e) of the Exchange Act and any other securities laws
or regulations in connection with the repurchase of Notes pursuant to this
Article IV.  To the extent that the provisions of any securities laws or
regulations conflict with the provisions of this Article IV, Sterling shall
comply

                                       30
<PAGE>
 
with the applicable securities laws and regulations and shall not be deemed to
have breached its obligations under this Article IV by virtue thereof.


                                   ARTICLE V

                                   COVENANTS

Section 5.01.  Payment of Principal, Premium and Interest.

          Sterling shall duly and punctually pay the principal of (and premium,
if any) and interest on the Notes in accordance with the terms of this Indenture
and the Notes.

Section 5.02.  Maintenance of Office or Agency.

          Sterling shall maintain an office or agency (which may be an office of
the Trustee or an affiliate of the Trustee, Registrar or co-registrar) where
Notes may be surrendered for registration of transfer or exchange and where
notices and demands to or upon Sterling in respect of the Notes and this
Indenture may be served.  Sterling shall give prompt written notice to the
Trustee of the location, and any change in such location, of such office or
agency.  If at any time Sterling shall fail to maintain any such required office
or agency or shall fail to furnish the Trustee with the address thereof, such
presentations, surrenders, notices and demands may be made or served at the
Corporate Trust Office of the Trustee.

          Sterling also from time to time may designate one or more additional
offices or agencies where the Notes may be presented or surrendered for any or
all such purposes and from time to time may rescind any such designation;
provided, however, that no such designation or rescission shall in any manner
relieve Sterling of its obligation to maintain an office or agency for such
purposes.  Sterling shall give prompt written notice to the Trustee of any such
designation or rescission and of any change in the location of any such other
office or agency.

Section 5.03.  SEC Reports.

          So long as any of the Notes remain outstanding, Sterling shall cause
copies of all quarterly and annual financial reports and of the information,
documents, and other reports (or copies of such portions of any of the foregoing
as the SEC may by rules and regulations prescribe) which Sterling is required to
file with the SEC pursuant to Section 13 or 15(d) of the Exchange Act, including
without limitation, Forms 8-K, 10-Q and 10-K, to be filed with the Trustee and
mailed to the Holders at their addresses appearing in the Note Register
maintained by the Registrar, in each case, within 5 Business Days of filing with
the SEC.  If Sterling is not subject to the requirements of such Section 13 or
15(d) of the Exchange Act, Sterling shall nevertheless continue to file with the
SEC, in conformity with Section 13 or Section 15(d) of the Exchange Act, and
provide the Trustee and Holders of Notes with such annual and quarterly reports
(without exhibits in the case of documents provided to the Trustee and Holders
of Notes) and such information, documents and other reports (or copies of such
portions of any of the foregoing as the SEC may by rules and regulations
prescribe) which are specified in Section 13 or Section 15(d) of the Exchange
Act, including without limitation, Forms 8-K, 10-Q and 10-K.  Sterling shall
also comply with the provisions of TIA Section 314(a).

                                       31
<PAGE>
 
Section 5.04.  Limitation On Debt.

          (a) Sterling shall not Incur, and shall not permit any Restricted
Subsidiary to Incur, directly or indirectly, any Debt unless the Consolidated
EBITDA Coverage Ratio at the date of such Incurrence exceeds 1.75 to 1.0 if such
Debt is Incurred on or prior to August 15, 1998, or 2.0 to 1.0 if such Debt is
Incurred thereafter.

          (b) Notwithstanding the foregoing paragraph (a), Sterling and its
Restricted Subsidiaries may Incur the following Debt:

           (i) Debt Incurred pursuant to the Revolving Credit Provisions of the
    Credit Agreements or any other revolving credit facility which, when taken
    together with all letters of credit and the principal amount of all other
    Debt Incurred pursuant to this clause (i), does not exceed the greater of
    $100 million and the sum of (x) 65% of the gross book value of the inventory
    of Sterling and its Restricted Subsidiaries, and (y) 85% of the gross book
    value of the accounts receivable of Sterling and its Restricted
    Subsidiaries;

           (ii) Debt Incurred pursuant to the Term Loan Provisions of the Credit
    Agreements or any indenture or term loan provisions of any other credit or
    loan agreement which, when taken together with the principal amount of all
    other Debt Incurred pursuant to this clause (ii), does not exceed $350
    million outstanding at any one time less the aggregate amount of all
    principal repayments of any such Debt actually made after the Issue Date
    (other than any such principal repayments made as a result of the
    Refinancing of any such Debt);

           (iii)  Debt Incurred pursuant to the ESOP Loan Provisions of the
    Credit Agreements in an aggregate principal amount not to exceed $6.5
    million outstanding at any one time less the aggregate amount of all
    principal repayments of any such Debt actually made after the Issue Date
    (other than any such principal repayments made as a result of the
    Refinancing of any such Debt);

           (iv) Debt of Sterling owed to and held by a Wholly Owned Subsidiary;
    provided, however, that any subsequent issuance or transfer of any Capital
    Stock that results in such Wholly Owned Subsidiary ceasing to be a Wholly
    Owned Subsidiary or any transfer of such Debt (other than to a Wholly Owned
    Subsidiary) shall be deemed, in each case, to constitute the issuance of
    such Debt by Sterling;

           (v) Debt of a Restricted Subsidiary incurred and outstanding on or
    prior to the date on which such Restricted Subsidiary became a Restricted
    Subsidiary or was acquired by Sterling (other than Debt issued in connection
    with, or to provide all or any portion of the funds or credit support
    utilized to consummate, the transaction or series of related transactions
    pursuant to which such Restricted Subsidiary became a Restricted Subsidiary
    or was acquired by Sterling);

           (vi) the Existing Subordinated Notes and the Notes;

           (vii)  Debt outstanding on the Issue Date (other than Debt described
    in clause (i), clause (ii), clause (iii), clause (iv), clause (v) or clause
    (vi);

                                       32
<PAGE>
 
           (viii)  Refinancing Debt in respect of Debt Incurred pursuant to
    paragraph (a) or pursuant to clause (vi) or clause (vii) or this clause
    (viii);

           (ix) Hedging Obligations; provided, that with respect to Interest
    Rate Agreements and Currency Agreements (if such Currency Agreements relate
    to Debt), only to the extent directly related to Debt permitted to be
    Incurred by Sterling pursuant to this Indenture; and

           (x) Debt in an aggregate principal amount which, together with all
    other Debt of Sterling and the Restricted Subsidiaries then outstanding
    (other than Debt permitted by clauses (i) through (ix) of this paragraph (b)
    or paragraph (a) above) does not exceed $25 million.

For purposes of determining compliance with this paragraph (b), (i) in the event
that an item of Debt meets the criteria of more than one of the types of Debt
described in paragraph (b), Sterling, in its sole discretion, will classify such
item of Debt and only be required to include the amount and type of such Debt in
one of the clauses of paragraph (b); and (ii) an item of Debt may be divided and
classified in more than one of the types of Debt in paragraph (b).

          (c) Notwithstanding paragraph (a) and paragraph (b) above, Sterling
shall not Incur any Debt if the proceeds thereof are used, directly or
indirectly, to repay, prepay, redeem, defease, retire, refund or refinance any
Subordinated Obligations unless such Debt shall be subordinated to the Notes to
at least the same extent as such Subordinated Obligations.

          (d) Notwithstanding paragraph (a) and paragraph (b) above, (i)
Sterling shall not Incur any Debt if such Debt is subordinated or junior in
ranking to any Senior Debt, unless such Debt is Senior Subordinated Debt or is
expressly subordinated in right of payment to Senior Subordinated Debt; and (ii)
Sterling shall not issue any Secured Debt which is not Senior Debt unless
contemporaneously therewith effective provision is made to secure the Notes
equally and ratably with such Secured Debt for so long as such Secured Debt is
secured by a Lien.

Section 5.05.  Limitation On Restricted Payments.

           (a) Sterling shall not, and shall not permit any Restricted
Subsidiary, directly or indirectly, to:

           (i) declare or pay any dividend or make any distribution on or in
    respect of its Capital Stock (including any payment in connection with any
    merger or consolidation involving Sterling) or similar payment to the direct
    or indirect holders of its Capital Stock (except dividends or distributions
    payable solely in its Non-Convertible Capital Stock or in options, warrants
    or other rights to purchase its Non-Convertible Capital Stock and except
    dividends or distributions payable to Sterling or a Restricted Subsidiary),
    and other than pro rata dividends or other distributions made by a
    Restricted Subsidiary of Sterling that is not a Wholly Owned Subsidiary to
    minority shareholders (or owners of an equivalent interest in the case of a
    Restricted Subsidiary that is an entity other than a corporation);

           (ii) purchase, redeem or otherwise acquire or retire for value any
    Capital Stock of Sterling, any direct or indirect parent of Sterling or a
    Restricted Subsidiary (other than such Capital Stock owned by Sterling or
    any Wholly Owned Subsidiary);

                                       33
<PAGE>
 
           (iii) purchase, repurchase, redeem, defease or otherwise acquire or
    retire for value, prior to scheduled maturity, scheduled repayment or
    scheduled sinking fund payment, any Subordinated Obligations (other than
    purchase, repurchase or other acquisition of Subordinated Obligations
    purchased in anticipation of satisfying a sinking fund obligation, principal
    installment or final maturity, in each case due within one year of the date
    of acquisition); or

           (iv) make any Investment in any Person (other than a Permitted
    Investment) (any such dividend, distribution, purchase, redemption,
    repurchase, defeasance, other acquisition, retirement or Investment being
    herein referred to as a "Restricted Payment"), if at the time Sterling or
    such Restricted Subsidiary makes such Restricted Payment:  (1) a Default
    shall have occurred and be continuing (or would result therefrom); (2)
    Sterling, after giving pro forma effect to such Restricted Payment, would
    not be permitted to Incur an additional $1.00 of Debt pursuant to Section
    5.04(a); or (3) the aggregate amount of such Restricted Payment and all
    other Restricted Payments since the Issue Date would exceed the sum of:  (A)
    50% of the Consolidated Net Income accrued during the period (treated as one
    accounting period) from the beginning of the fiscal quarter during which the
    Existing Subordinated Notes were originally issued to the end of the most
    recent fiscal quarter ending at least 45 days prior to the date of such
    Restricted Payment (or, in case such Consolidated Net Income shall be a
    deficit, minus 100% of such deficit); provided, however, that if the Notes
    achieve an Investment Grade Rating  during any fiscal quarter, the
    percentage for such fiscal quarter (and for any other fiscal quarter where,
    on the first day of such fiscal quarter, the Notes shall have an Investment
    Grade Rating) will be 100% of Consolidated Net Income during such fiscal
    quarter; provided, further, however, that if such Restricted Payment is to
    be made in reliance upon an additional amount permitted pursuant to the
    immediately preceding proviso, the Notes must have an Investment Grade
    Rating at the time such Restricted Payment is declared or, if not declared,
    made; (B) the aggregate Net Cash Proceeds received by Sterling from the
    issue or sale of its Capital Stock (other than Redeemable Stock or
    Exchangeable Stock) subsequent to the Issue Date (other than an issuance or
    sale to a Subsidiary or an employee stock ownership plan or similar trust);
    (C) the aggregate Net Cash Proceeds received by Sterling from the issue or
    sale of its Capital Stock (other than Redeemable Stock or Exchangeable
    Stock) to an employee stock ownership plan subsequent to the Issue Date;
    provided, however, that if such employee stock ownership plan issues any
    Debt, such aggregate amount shall be limited to an amount equal to any
    increase in the Consolidated Net Worth of Sterling resulting from principal
    repayments made by such employee stock ownership plan with respect to Debt
    issued by it to finance the purchase of such Capital Stock; (D) the amount
    by which Debt of Sterling is reduced on Sterling's balance sheet upon the
    conversion or exchange (other than by a Subsidiary) subsequent to the Issue
    Date, of any Debt of Sterling convertible or exchangeable for Capital Stock
    (other than Redeemable Stock or Exchangeable Stock) of Sterling (less the
    amount of any cash, or other property, distributed by Sterling upon such
    conversion or exchange); (E) an amount equal to the sum of (x) the net
    reduction in Investments in Unrestricted Subsidiaries resulting from
    dividends, repayments of loans or advances or other transfers of assets, in
    each case to Sterling or any Restricted Subsidiary from Unrestricted
    Subsidiaries, and (y) the portion (proportionate to Sterling's equity
    interest in such Subsidiary) of the fair market value of the net assets of
    an Unrestricted Subsidiary at the time such Unrestricted Subsidiary is
    designated a Restricted Subsidiary; provided, however, that the foregoing
    sum shall not exceed, in the case of any Unrestricted Subsidiary, the amount
    of Investments previously made (and treated as a Restricted Payment) by
    Sterling or any Restricted Subsidiary in

                                       34
<PAGE>
 
    such Unrestricted Subsidiary; (F) to the extent not covered in sub-clauses
    (A) through (E) of this clause (iv)(3), the aggregate net cash proceeds
    received after the date of the Existing Subordinated Notes Indenture by
    Sterling as capital contributions (other than from any of its Restricted
    Subsidiaries); and (G) $5 million; provided, however, that, to the extent
    used, such $5 million shall reduce the amount available for Investments
    pursuant to clause (xii) of the definition of "Permitted Investments"; and
    provided, further, however, that the amounts available under this sub-clause
    (G) and under clause (xi) of the definition of "Permitted Investments" shall
    in no event exceed $10 million in the aggregate.

           (b) The provisions of the foregoing paragraph (a) shall not prohibit:

           (i) any purchase or redemption of Capital Stock or Subordinated
    Obligations of Sterling made by exchange for, or out of the proceeds of the
    substantially concurrent sale of, Capital Stock of Sterling (other than
    Redeemable Stock or Exchangeable Stock of Sterling and other than Capital
    Stock of Sterling issued or sold to a Subsidiary or an employee stock
    ownership plan); provided, however, that (1) such purchase or redemption
    shall be excluded in the calculation of the amount of Restricted Payments,
    and (2) the Net Cash Proceeds from such sale shall be excluded from clause
    (iv)(3)(B) and clause (iv)(3)(C) of paragraph (a) above;

           (ii) any purchase, redemption, defeasance or other acquisition or
    retirement for value of Subordinated Obligations of Sterling made by
    exchange for, or out of the proceeds of the substantially concurrent sale
    of, Debt of Sterling which is permitted to be Incurred pursuant to Section
    5.04; provided, however, that such purchase, redemption, defeasance or other
    acquisition or retirement for value shall be excluded in the calculation of
    the amount of Restricted Payments;

           (iii)  any purchase or redemption of Subordinated Obligations from
    Net Available Cash to the extent permitted under Section 5.07; provided,
    however, that such purchase or redemption shall be excluded in the
    calculation of the amount of Restricted Payments;

           (iv) dividends paid within 60 days after the date of declaration
    thereof if at such date of declaration such dividend would have complied
    with this provision; provided, however, that at the time of declaration of
    such dividend, no other Default shall have occurred and be continuing (or
    would result therefrom); and provided, further, however, that such dividend
    shall be included in the calculation of the amount of Restricted Payments;

           (v) the declaration or payment of any dividend on shares of
    Sterling's common stock so long as (1) Sterling would be permitted
    immediately after giving pro forma effect to such declaration or payment to
    Incur an additional $1.00 of Debt pursuant to Section 5.04(a), (2) such
    declaration or payment is made immediately prior to a date on which cash
    interest is required to be paid on the Discount Notes, and (3) the full
    amount of such payment is applied by Holdings on such date as payment of
    such cash interest on the Discount Notes; provided that such dividend shall
    be included in the calculation of the amount of Restricted Payments;

           (vi) payments to the ESOP on behalf of the employees of Holdings or
    its Subsidiaries; provided, however, that all such payments by Sterling and
    its Subsidiaries

                                       35
<PAGE>
 
    may not exceed, during any fiscal year, 10% of the aggregate compensation
    expense during such fiscal year attributable to employees of Holdings and
    its Subsidiaries who are eligible to participate in the ESOP;

           (vii)  a payment to Holdings to pay its operating and administrative
    expenses, including, without limitation, directors fees, legal and audit
    expenses, SEC compliance expenses, and corporate franchise and other taxes,
    in an amount not to exceed the greater of $2.0 million per fiscal year and
    0.2% of revenues of Sterling for the preceding fiscal year; provided,
    however, that such amount shall be excluded in the calculation of the amount
    of Restricted Payments;

           (viii)  a payment by Sterling to Holdings or to the ESOP or directly
    by Sterling to be used to repurchase common stock of Holdings distributed to
    participants and beneficiaries of the ESOP as required by and in accordance
    with the ESOP as in effect on the Issue Date and Section 409(h)(1)(B) of the
    Code and the regulations thereunder; provided, however, that such amount
    shall be excluded in the calculation of the amount of Restricted Payments;

           (ix) a payment by Sterling to Holdings or the ESOP, or directly by
    Sterling, to be used to repurchase, redeem, acquire or retire for value any
    Capital Stock of Holdings pursuant to any stockholder's agreement,
    management equity subscription plan or agreement, stock option plan or
    agreement or employee benefit plan in effect as of the Issue Date or such
    employee plan or agreement or employee benefit plan as may be adopted by
    Sterling or Holdings from time to time; provided, however, that the
    aggregate price paid for all Capital Stock repurchased, redeemed, acquired
    or retired by Sterling or on behalf of Holdings or Sterling shall not exceed
    $5 million in any fiscal year; provided, further, however, that such amount,
    to the extent related to the ESOP, shall be excluded in the calculation of
    Restricted Payments;

           (x) a payment to Holdings pursuant to the tax sharing agreement as
    the same may be amended from time to time in a manner not materially adverse
    to Sterling; provided, however, that such amount shall be excluded in the
    calculation of the amount of Restricted Payments;

           (xi) any payment to Holdings to permit Holdings to make payments for
    advisory services owed pursuant to the engagement letter dated as of April
    23, 1996, by and between STX Acquisition Corp. and The Sterling Group, Inc.;
    provided, however, that such amount shall be excluded in the calculation of
    the amount of Restricted Payments; and

           (xii)  a payment to Holdings to permit Holdings to comply with the
    terms of the Discount Notes Indenture relating to the application of
    proceeds from an Asset Disposition (relating to the sale or disposition of
    property by Sterling) as defined in such Discount Notes Indenture; provided,
    however, that such amount shall be excluded in the calculation of the amount
    of Restricted Payments.

                                       36
<PAGE>
 
Section 5.06.  Limitation On Restrictions On Distributions from Restricted
               Subsidiaries.

          Sterling shall not, and shall not permit any Restricted Subsidiary to,
create or permit to exist or become effective any consensual encumbrance or
restriction on the ability of any Restricted Subsidiary to:

           (i) pay dividends or make any other distributions on its Capital
    Stock or pay any Debt or other obligation owed to Sterling,

           (ii) make any loans or advances to Sterling or

           (iii)  transfer any of its property or assets to Sterling, except:

                (1) any encumbrance or restriction pursuant to an agreement in
           effect on the Issue Date or pursuant to the issuance of the Notes;

                (2) any encumbrance or restriction with respect to a Restricted
           Subsidiary pursuant to an agreement relating to any Debt Incurred by
           such Restricted Subsidiary on or prior to the date on which such
           Restricted Subsidiary was acquired by Sterling (other than Debt
           Incurred as consideration in, or to provide all or any portion of the
           funds or credit support utilized to consummate, the transaction or
           series of related transactions pursuant to which such Restricted
           Subsidiary became a Restricted Subsidiary or was acquired by
           Sterling) and outstanding on such date;

                (3) any encumbrance or restriction pursuant to an agreement
           effecting a Refinancing of Debt Incurred pursuant to an agreement
           referred to in clause (iii)(1) or clause (iii)(2) or contained in any
           amendment to an agreement referred to in clause (iii)(1) or clause
           (iii)(2); provided, however, that the encumbrances and restrictions
           contained in any of such refinancing agreement or amendment are no
           less favorable to the Holders than encumbrances and restrictions with
           respect to such Restricted Subsidiary contained in such agreements;

                (4) any such encumbrance or restriction consisting of customary
           nonassignment provisions in leases governing leasehold interests to
           the extent such provisions restrict the transfer of the lease or
           other customary non-assignment provisions in contracts (other than
           contracts that constitute Debt) entered into the ordinary course of
           business to the extent such provisions restrict the transfer of the
           assets subject to such contracts;

                (5) in the case of this clause (iii), restrictions contained in
           security agreements or mortgages securing Debt of a Restricted
           Subsidiary to the extent such restrictions restrict the transfer of
           the property subject to such security agreements or mortgages;

                (6) encumbrances or restrictions imposed by operation of
           applicable law; and

                (7) any restriction with respect to a Restricted Subsidiary
           imposed pursuant to an agreement entered into for the sale or
           disposition of all or

                                       37
<PAGE>
 
           substantially all the Capital Stock or assets of such Restricted
           Subsidiary pending the closing of such sale or disposition.

Section 5.07.  Limitation On Sales of Assets and Subsidiary Stock.

          (a) Sterling shall not, and shall not permit any Restricted Subsidiary
to, directly or indirectly, consummate any Asset Disposition unless

           (i) Sterling or such Restricted Subsidiary receives consideration at
    the time of such Asset Disposition at least equal to the fair market value,
    as determined in good faith by the Board of Directors (including as to the
    value of all non-cash consideration), of the shares and assets subject to
    such Asset Disposition and at least 85% of the consideration thereof
    received by Sterling or such Restricted Subsidiary is in the form of cash or
    cash equivalents, and

           (ii) an amount equal to 100% of the Net Available Cash from such
    Asset Disposition is applied by Sterling (or such Restricted Subsidiary, as
    the case may be):

           (1) FIRST, to the extent Sterling elects (or is required by the terms
    of any Senior Debt), to prepay, repay or purchase Senior Debt or Debt (other
    than any Redeemable Stock) of a Wholly Owned Subsidiary (in each case other
    than Debt owed to Sterling or an Affiliate of Sterling or Holdings) within
    180 days from the later of the date of such Asset Disposition or the receipt
    of such Net Available Cash;

           (2) SECOND, to the extent of the balance of such Net Available Cash
    after application in accordance with clause (ii)(1) above, at Sterling's
    election to the investment by Sterling, any Wholly Owned Subsidiary or the
    Restricted Subsidiary making such Asset Disposition in assets to replace the
    assets that were the subject of such Asset Disposition or an asset that (as
    determined by the Board of Directors) will be used in the business of
    Sterling, the Wholly Owned Subsidiaries or the Restricted Subsidiary making
    such Asset Disposition existing on the date of original issuance of the
    Notes or in businesses reasonably related thereto, in each case within the
    later of one year from the date of such Asset Disposition or the receipt of
    such Net Available Cash;

           (3) THIRD, to the extent of the balance of such Net Available Cash
    after application in accordance with clause (ii)(1) and clause (ii)(2), to
    make an offer to purchase Notes (and any other Senior Subordinated Debt of
    Sterling designated by Sterling) pursuant to and subject to the conditions
    contained in this Indenture; and

           (4) FOURTH, to the extent of the balance of such Net Available Cash
    after application in accordance with clause (ii)(1), clause (ii)(2) and
    clause (ii)(3), to (A) the acquisition by Sterling, any Wholly Owned
    Subsidiary or the Restricted Subsidiary making such Asset Disposition of
    Tangible Property, or (B) the prepayment, repayment or purchase of Debt
    (other than any Redeemable Stock) of Sterling or Debt of any Restricted
    Subsidiary (in either case other than Debt owed to Sterling or an Affiliate
    of Sterling), in each case within one year from the later of the receipt of
    such Net Available Cash and the date the offer described in paragraph (b)
    below is consummated;

provided, however, that in connection with any prepayment, repayment or purchase
of Debt pursuant to clause (ii)(1), clause (ii)(3) or clause (ii)(4) of this
paragraph (a), Sterling shall cause

                                       38
<PAGE>
 
the related loan commitment (if any) to be permanently reduced in an amount
equal to the principal amount so prepaid, repaid or purchased. Notwithstanding
the foregoing provisions of this paragraph, Sterling and its Restricted
Subsidiaries shall not be required to apply any Net Available Cash in accordance
with this paragraph except to the extent that the aggregate Net Available Cash
from all Asset Dispositions which are not applied in accordance with this
paragraph exceeds $20 million. Pending application of Net Available Cash
pursuant to this paragraph, such Net Available Cash shall be invested in
Temporary Cash Investments.

          For the purposes of this Section 5.07, the following are deemed to be
cash or cash equivalents: (x) the express assumption of Debt of Sterling or any
Restricted Subsidiary and the release of Sterling or such Restricted Subsidiary
from all liability on such Debt in connection with such Asset Disposition, and
(y) securities received by Sterling or any Restricted Subsidiary from the
transferee that are converted by Sterling or such Restricted Subsidiary into
cash within 90 days of the receipt of such securities. The 85% limitation
referred to in the previous paragraph shall not apply to any Asset Disposition
in which the cash portion of the consideration received therefor, determined in
accordance with the previous sentence, is equal to or greater than what the
after-tax proceeds would have been had such Asset Disposition complied with such
85% limitation.

          (b) In the event of an Asset Disposition that requires the purchase of
the Notes (and other Senior Subordinated Debt) pursuant to clause (a)(ii)(3)
above, Sterling will be required to purchase Notes tendered pursuant to an offer
by Sterling for the Notes (and other Senior Subordinated Debt) at a purchase
price of 100% of their principal amount (without premium) plus accrued but
unpaid interest (or, in respect of such other Senior Subordinated Debt, such
lesser price, if any, as may be provided for by the terms of such Senior
Subordinated Debt) in accordance with the procedures (including prorating in the
event of oversubscription) set forth in this Indenture. If the aggregate
purchase price of Notes (and any other Senior Subordinated Debt) tendered
pursuant to such offer is less than the Net Available Cash allotted to the
purchase thereof, Sterling will be required to apply the remaining Net Available
Cash in accordance with clause (a)(ii)(4) above. Sterling shall not be required
to make such an offer to purchase Notes (and other Senior Subordinated Debt)
pursuant to this Section 5.07 if the Net Available Cash available therefor is
less than $10 million (which lesser amount shall be carried forward for purposes
of determining whether such an offer is required with respect to any subsequent
Asset Disposition).

          To the extent that any or all of the Net Available Cash of any Foreign
Asset Sale is prohibited or delayed by applicable local law from being
repatriated to the United States, the portion of such Net Available Cash so
affected shall not be required to be applied at the time provided above, but may
be retained by the applicable Restricted Subsidiary (and invested in accordance
with the last sentence of the first paragraph of paragraph (a) above) so long,
but only so long, as the applicable local law will not permit repatriation to
the United States. Sterling shall agree to cause the applicable Restricted
Subsidiary to promptly take all actions required by the applicable local law to
permit such repatriation. Once such repatriation of any of such affected Net
Available Cash is permitted under the applicable local law, such repatriation
shall be immediately effected and such repatriated Net Available Cash will be
applied in the manner described in this Section 5.07.

          (c) Sterling shall comply, to the extent applicable, with the
requirements of Section 14(e) of the Exchange Act and any other securities laws
or regulations in connection with the repurchase of Notes pursuant to this
Section 5.07.  To the extent that the provisions of any

                                       39
<PAGE>
 
securities laws or regulations conflict with provisions of this Section 5.07,
Sterling shall comply with the applicable securities laws and regulations and
shall not be deemed to have breached its obligations under this clause by virtue
thereof.

Section 5.08.  Limitation On Transactions with Affiliates.

          (a) Sterling shall not, and shall not permit any Restricted Subsidiary
to, conduct any business or enter into any transaction or series of related
transactions (including the purchase, sale, lease or exchange of any property or
the rendering of any service) with any Affiliate of Holdings or Sterling (an
"Affiliate Transaction") unless:

           (i) the terms of such Affiliate Transaction are (1) set forth in
    writing, and (2) as favorable to Sterling or such Restricted Subsidiary as
    terms that would be obtainable at the time for a comparable transaction or
    series of related transactions in arm's length dealings with an unrelated
    third Person,

           (ii) if such Affiliate Transaction involves an amount in excess of
    $2.5 million, the disinterested members of the Board of Directors have, by
    resolution, determined in good faith that such Affiliate Transaction meets
    the criteria set forth in clause (i)(2) above, and

           (iii)  if such Affiliate Transaction involves an amount in excess of
    $7.5 million, such Affiliate Transaction is determined by an Independent
    Financial Advisor to be fair from a financial standpoint to Sterling or its
    Restricted Subsidiary, as the case may be.

          The foregoing requirements shall not be applicable to (x) contracts
with Koch Capital Services, Inc. or its affiliates in the ordinary course of
business on terms as favorable to Sterling or the relevant Restricted Subsidiary
as would be obtainable at the time for a comparable transaction in arm's length
dealings with an unrelated third Person, or (y) any purchase or supply contracts
in the ordinary course of business on terms as favorable to Sterling or the
relevant Restricted Subsidiary as would be obtainable at the time for a
comparable transaction in arm's length dealings with an unrelated third Person;
provided, however, that the Board of Directors shall, not later than the 60th
day after the end of each six-month period following the Issue Date, have
reviewed such contracts and determined that such contracts meet the criteria set
forth in this sub-clause (y).

           (b) The provisions of the foregoing paragraph (a) shall not prohibit:

           (i) any Restricted Payment or Permitted Investment permitted to be
    paid pursuant to the covenant described in Section 5.05;

           (ii) any issuance of securities, or other payments, awards or grants
    in cash, securities or otherwise pursuant to, or the funding of, employment
    arrangements, stock options and stock ownership plans approved by the Board
    of Directors or the board of directors of the relevant Restricted
    Subsidiary;

           (iii)  loans or advances to employees in the ordinary course of
    business, but in any event not to exceed $2 million in the aggregate
    outstanding at any one time;

                                       40
<PAGE>
 
           (iv) the payment of reasonable and customary fees to directors of
    Sterling and its Restricted Subsidiaries who are not employees of Sterling
    or its Restricted Subsidiaries;

           (v) any transaction between Sterling and a Wholly Owned Subsidiary or
    between Wholly Owned Subsidiaries;


           (vi) indemnification payments to directors and officers of Sterling
    in accordance with applicable state laws.

Section 5.09.  Limitation On the Sale or Issuance of Capital Stock of Restricted
Subsidiaries.

          Sterling shall not sell or otherwise dispose of any shares of Capital
Stock of a Restricted Subsidiary, and shall not permit any Restricted
Subsidiary, directly or indirectly, to issue or sell or otherwise dispose of any
shares of its Capital Stock except:

           (i) to Sterling or a Wholly Owned Subsidiary;

          (ii) if, immediately after giving effect to such issuance, sale or
other disposition, such Restricted Subsidiary remains a Restricted Subsidiary;
or

          (iii) if all shares of Capital Stock of such Restricted Subsidiary are
sold or otherwise disposed of; provided, however, that in connection with any
sale pursuant to this clause (iii), Sterling may retain no more than 10% of the
outstanding Capital Stock of the Restricted Subsidiary being sold as a portion
of the purchase price in connection with such sale.

          In connection with any such sale or disposition of Capital Stock,
Sterling or any such Restricted Subsidiary shall comply with Section 5.07.

Section 5.10.  Compliance Certificates.

          Sterling shall deliver to the Trustee, within 120 days after the end
of each fiscal year, an Officers' Certificate stating that a review of the
activities of Sterling and its Subsidiaries during the preceding fiscal year has
been made under the supervision of the signing Officers with a view to
determining whether Sterling has kept, observed, performed and fulfilled its
obligations under this Indenture, and further stating, as to each such Officer
signing such Officers' Certificate, that to the best of his or her knowledge
Sterling has kept, observed, performed and fulfilled each covenant contained in
this Indenture and is not in default in the performance or observance of any of
the terms, provisions and conditions of this Indenture (or, if a Default or
Event of Default shall have occurred, describing all such Defaults or Events of
Default of which he or she may have knowledge and what action each is taking or
proposes to take with respect thereto).  Sterling shall also comply with TIA 
Section 314(a)(4).

Section 5.11.  Further Instruments and Acts.

          Upon request of the Trustee, Sterling will execute and deliver such
further instruments and do such further acts as may be reasonably necessary or
proper to carry out more effectively the purpose of this Indenture.

                                       41
<PAGE>
 
                                 ARTICLE VI

                                   SUCCESSORS

Section 6.01.  When Sterling May Merge or Transfer Assets.

          Sterling shall not consolidate with or merge with or into, or convey,
transfer or lease, in one transaction or a series of transactions, all or
substantially all its assets to, any Person, unless:

          (i) the resulting, surviving or transferee Person (the "Successor
Company") shall be a Person organized and existing under the laws of the United
States of America, any State thereof or the District of Columbia and the
Successor Company (if not Sterling) expressly assumes, by an indenture
supplemental hereto, executed and delivered to the Trustee, in form acceptable
to the Trustee, all the obligations of Sterling under the Notes and this
Indenture;

          (ii) immediately after giving effect to such transaction (and treating
any Debt which becomes an obligation of the Successor Company or any Subsidiary
as a result of such transaction as having been Incurred by such Successor
Company or such Subsidiary at the time of such transaction), no Default shall
have occurred and be continuing;

          (iii) immediately after giving effect to such transaction, the
Successor Company would be able to Incur an additional $1.00 of Debt pursuant to
Section 5.04(a);

          (iv) immediately after giving effect to such transaction, the
Successor Company shall have Consolidated Net Worth in an amount which is not
less than the Consolidated Net Worth of Sterling prior to such transaction minus
any costs incurred in connection with such transaction; and

          (v) Sterling shall have delivered to the Trustee an Officers'
Certificate and an Opinion of Counsel, each stating that such consolidation,
merger or transfer and such supplemental indenture (if any) comply with the
terms of this Indenture.

Section 6.02.  Successor Company Substituted.

          The Successor Company shall be the successor to Sterling and shall
succeed to, and be substituted for, and may exercise every right and power of,
Sterling under this Indenture, but the predecessor Person in the case of a
conveyance, transfer or lease shall not be released from the obligation to pay
the principal of and interest on the Notes.

                                       42
<PAGE>
 
                                 ARTICLE VII

                             DEFAULTS AND REMEDIES

Section 7.01.  Events of Default.

           Each of the following shall constitute an "Event of Default":

          (i) Sterling defaults in any payment of interest on any Note when the
same becomes due and payable, whether or not such payment shall be prohibited by
Article XI, and such default continues for a period of 30 days;

          (ii) Sterling defaults in the payment of the principal of any Note
when the same becomes due and payable at its Stated Maturity, upon redemption,
upon declaration, upon required repurchase or otherwise, whether or not such
payment shall be prohibited by Article XI;

          (iii) Sterling fails to comply with Article VI;

          (iv) Sterling fails to comply for 30 days after the notice specified
in this Section 7.01 with any of its obligations contained in Article IV (other
than a failure to purchase Notes), Section 5.03, Section 5.04, Section 5.05,
Section 5.06, Section 5.07 (other than a failure to purchase Notes), Section
5.08, Section 5.09 or Section 5.10;

          (v) Sterling fails to comply with any of its agreements in the Notes
or this Indenture (other than those referred to in clause (i),  clause (ii),
clause (iii) or clause (iv) of this Section 7.01) and such failure continues for
60 days after the notice specified in this Section 7.01;

          (vi) a default under any mortgage, indenture or instrument under which
there may be issued or by which there may be secured or evidenced any Debt for
money borrowed by Sterling or any of its Subsidiaries (or the payment of which
is Guaranteed by Sterling or any of its Subsidiaries) whether such Debt or
Guarantee now exists, or is created after the date of this Indenture, which
default (1) is caused by failure to pay principal of or premium, if any, or
interest on such Debt prior to the expiration of the grace period provided in
such Debt on the date of such default ("Payment Default"), or (2) results in the
acceleration of such Debt prior to its express maturity and, in each case, the
principal amount of any such Debt, together with the principal amount of any
other such Debt under which there has been a Payment Default or the maturity of
which has been so accelerated, aggregates $10 million or more;

          (vii) Sterling or any Significant Subsidiary of Sterling pursuant to
or within the meaning of Bankruptcy Law:  (1) commences a voluntary case, (2)
consents to the entry of an order for relief against it in an involuntary case,
(3) consents to the appointment of a Custodian of it or for all or substantially
all of its property; or (4) makes a general assignment for the benefit of its
creditors;

          (viii)  a court of competent jurisdiction enters an order or decree
under any Bankruptcy Law that:  (1) is for relief against Sterling or any
Significant Subsidiary of Sterling in an involuntary case, (2) appoints a
Custodian of Sterling or any Significant Subsidiary of Sterling or for all or
substantially all of the property of Sterling or any Significant Subsidiary of
Sterling, or (3) orders the liquidation of Sterling or any Significant
Subsidiary of Sterling, and the order or decree remains unstayed and in effect
for 60 consecutive days; and

                                       43
<PAGE>
 
          (ix) any final non-appealable judgment or decree not covered by
insurance or as to which the insurance carrier has denied responsibility for the
payment of money in excess of $10 million is rendered against Sterling or a
Significant Subsidiary and is not discharged and there is a period of 60 days
following such judgment during which such judgment or decree is not discharged,
waived or the execution thereof stayed.

          A Default under clause (iv) or clause (v) is not an Event of Default
until the Trustee or the Holders of at least 25% in principal amount of the
Notes notify Sterling of the Default and Sterling does not cure such Default
within the time specified after receipt of such notice.

          The foregoing will constitute Events of Default whatever the reason
for any such Event of Default and whether it is voluntary or involuntary or is
effected by operation of law or pursuant to any judgment, decree or order of any
court or any order, rule or regulation of any administrative or governmental
body.

          Sterling shall deliver to the Trustee, within 30 days after the
occurrence thereof, an Officers' Certificate of any Event of Default pursuant to
clause (iii), clause (iv), clause (v), clause (vi), clause (vii), clause (viii)
or clause (ix) and any event which with the giving of notice or the lapse of
time would become an Event of Default, its status and what action Sterling is
taking or proposes to take in respect thereof.

Section 7.02.  Acceleration.

          If an Event of Default (other than an Event of Default specified in
clause (vii) or clause (viii) of Section 7.01) occurs and is continuing, the
Trustee by notice to Sterling, or the Holders of at least 25% in aggregate
principal amount of the then outstanding Notes by written notice to Sterling and
the Trustee, may declare the principal of and accrued but unpaid interest on all
the Notes to be due and payable (collectively, the "Default Amount").  Upon such
a declaration, the Default Amount shall be due and payable immediately.
Notwithstanding the foregoing, in case of an Event of Default specified in
clause (vii) or clause (viii) of Section 7.01, all outstanding Notes shall ipso
facto become and be immediately due and payable without any declaration or other
act on the part of the Trustee or any Holders of the Notes.  The Holders of a
majority in aggregate principal amount of the then outstanding Notes by written
notice to the Trustee may on behalf of all of the Holders rescind an
acceleration and its consequences if the rescission would not conflict with any
judgment or decree and if all existing Events of Default (except nonpayment of
principal, interest or premium that has become due solely because of the
acceleration) have been cured or waived.

Section 7.03.  Other Remedies.

          If an Event of Default occurs and is continuing, the Trustee may
pursue any available remedy to collect the payment of principal, premium, if
any, and interest on the Notes or to enforce the performance of any provision of
the Notes and this Indenture.

          The Trustee may maintain a proceeding even if it does not possess any
of the Notes or does not produce any such Notes in the proceeding.  A delay or
omission by the Trustee or any Holder of a Note in exercising any right or
remedy accruing upon any Event of Default shall not impair the right or remedy
or constitute a waiver of or acquiescence in such Event of

                                       44
<PAGE>
 
Default.  No remedy shall be exclusive of any other remedy.  All remedies shall
be cumulative to the extent permitted by law.

Section 7.04.  Waiver of Past Defaults.

          Holders of a majority in aggregate principal amount of the Notes then
outstanding by notice to the Trustee may on behalf of the Holders of all of the
Notes waive an existing Default and its consequences, except (i) a Default in
the payment of the principal of, premium, if any, or interest on, the Notes; or
(ii) a Default in respect of a provision that under Section 10.02 cannot be
amended without the consent of each Holder affected thereby.  Upon any such
waiver, such Default shall cease to exist, and any Event of Default arising
therefrom shall be deemed to have been cured for every purpose of this
Indenture; but no such waiver shall extend to any subsequent or other Default or
impair any right consequent thereon.

Section 7.05.  Control by Majority.

          Holders of a majority in principal amount of the Notes then
outstanding may direct the time, method and place of conducting any proceeding
for exercising any remedy available to the Trustee or exercising any trust or
power conferred on the Trustee.  However, the Trustee may refuse to follow any
direction that conflicts with law or the terms of this Indenture or if, subject
to Section 8.01, the Trustee reasonably determines that such action, if taken,
would be unduly prejudicial to the rights of other Holders of Notes or may
involve the Trustee in personal liability.

Section 7.06.  Limitation On Suits.

          Except to enforce the right to receive payment of principal, premium,
if any, or interest when due, no Holder of a Note may pursue any remedy with
respect to this Indenture or the Notes, unless:

            (i)  such Holder has previously given the Trustee notice that an
    Event of Default is continuing;

            (ii)  Holders of at least 25% in principal amount of the Notes then
    outstanding have requested the Trustee to pursue the remedy;

           (iii)  such Holders have offered the Trustee reasonable security or
    indemnity against any loss, liability or expense;

            (iv)  the Trustee has not complied with such request within 60 days
    after the receipt thereof and the offer of security or indemnity; and

            (v)  Holders of a majority in principal amount of the Notes then
    outstanding have not given the Trustee a direction inconsistent with such
    request within such 60-day period.

          A Holder of a Note shall not use this Indenture to prejudice the
rights of another Holder of a Note or to obtain a preference or priority over
another Holder of a Note.

                                       45
<PAGE>
 
Section 7.07.  Unconditional Right of Holders of Notes to Receive Payment.

          Notwithstanding any other provision of this Indenture, the right of
any Holder of a Note to receive payment of principal, premium, if any, and
interest on such Note, on or after the respective due dates expressed in such
Note, or to bring suit for the enforcement of any such payment on or after such
respective dates, shall not be impaired or affected without the consent of any
such Holder of a Note.

Section 7.08.  Collection Suit by Trustee.

          If an Event of Default specified in Section 7.01(i) or Section
7.01(ii) occurs and is continuing, the Trustee may recover judgment in its own
name and as trustee of an express trust against Sterling for the entire amount
then due and owing, plus the amounts provided for in Section 8.07.

Section 7.09.  Trustee May File Proofs of Claim.

          The Trustee may file such proofs of claim and other papers or
documents as may be necessary or advisable in order to have the claims of the
Trustee and the Holders of the Notes allowed in any judicial proceedings
relative to Sterling, Sterling's creditors or Sterling's property, and, unless
prohibited by law or applicable regulations, may vote on behalf of the Holders
of Notes in any election of a trustee in bankruptcy or other Person performing
similar functions, and any Custodian in any such judicial proceeding is hereby
authorized by each Holder of a Note to make payments to the Trustee, and, in the
event that the Trustee shall consent to the making of such payments directly to
the Holders of Notes, to pay to the Trustee any amount due to it for the
reasonable compensation, expenses, disbursements and advances of the Trustee,
its agents and counsel, and any other amounts due to Trustee under Section 8.07.
Nothing herein contained shall be deemed to authorize the Trustee to authorize
or consent to or accept or adopt on behalf of any Holder of a Note any plan of
reorganization, arrangement, adjustment or composition affecting the Notes or
the rights of any Holder of a Note thereof, or to authorize the Trustee to vote
in respect of the claim of any Holder of a Note in any such proceeding.

Section 7.10.  Priorities.

           If the Trustee collects any money pursuant to this Article VII, it
shall pay out the money in the following order:

           (i) FIRST:  to the Trustee for amounts due to it under Section 8.07;

           (ii) SECOND:  to holders of Senior Debt to the extent required by
    Article XI;

           (iii)  THIRD:  to Holders of Notes for amounts due and unpaid on the
    Notes for principal, premium, if any, and interest, ratably, without
    preference or priority of any kind, according to the amounts due and payable
    on the Notes for principal, premium, if any, and interest, respectively; and

           (iv) FOURTH:  to Sterling.

           The Trustee may fix a record date and payment date for any payment to
Holders of Notes pursuant to this Section 7.10.

                                       46
<PAGE>
 
Section 7.11.  Undertaking for Costs.

          In any suit for the enforcement of any right or remedy under this
Indenture or in any suit against the Trustee for any action taken or omitted by
it as a Trustee, a court in its discretion may require the filing by any party
litigant in the suit of an undertaking to pay the costs of the suit, and the
court in its discretion may assess reasonable costs, including reasonable
attorneys' fees, against any party litigant in the suit, having due regard to
the merits and good faith of the claims or defenses made by the party litigant.
This Section 7.11 shall not apply to a suit by the Trustee, a suit by a Holder
of a Note pursuant to Section 7.07, or a suit by Holders of more than 10% in
principal amount of the Notes then outstanding.

Section 7.12.  Waiver of Stay, Extension and Usury Laws.

          Sterling (to the extent that it may lawfully do so) shall not at any
time insist upon, plead, or in any manner whatsoever claim or take the benefit
or advantage of, any stay, extension or usury law wherever enacted, now or at
any time hereafter in force, that may affect the covenants or the performance of
this Indenture; and Sterling (to the extent that it may lawfully do so) hereby
expressly waives all benefit or advantage of any such law, and shall not, by
resort to any such law, hinder, delay or impede the execution of any power
herein granted to the Trustee, but shall suffer and permit the execution of
every such power as though no such law had been enacted.


                                  ARTICLE VIII

                                    TRUSTEE

Section 8.01.  Duties of Trustee.

          (a) If an Event of Default of which a Responsible Officer of the
Trustee is aware has occurred and is continuing, the Trustee shall exercise such
of the rights and powers vested in it by this Indenture, and use the same degree
of care and skill in their exercise, as a prudent man would exercise or use
under the circumstances in the conduct of his own affairs.

           (b) Except during the continuance of an Event of Default of which a
Responsible Officer of the Trustee is aware:

              (i) the duties of the Trustee shall be determined solely by the
    express provisions of this Indenture and the Trustee need perform only those
    duties that are specifically set forth in this Indenture and no others; and

              (ii) in the absence of bad faith on its part, the Trustee may
    conclusively rely, as to the truth of the statements and the correctness of
    the opinions expressed therein, upon certificates or opinions furnished to
    the Trustee and conforming to the requirements of this Indenture.  However,
    the Trustee shall examine the certificates and opinions to determine whether
    or not they conform to the requirements of this Indenture.

          (c) The Trustee shall not be relieved from liabilities for its own
negligent action, its own negligent failure to act, or its own willful
misconduct or bad faith, except that:

                                       47
<PAGE>
 
              (i) this paragraph does not limit the effect of paragraph (b) of
    this Section 8.01;

              (ii) the Trustee shall not be liable for any error of judgment
    made in good faith by a Responsible Officer, unless it is proved that the
    Trustee was negligent in ascertaining the pertinent facts; and

              (iii)  the Trustee shall not be liable with respect to any action
    taken or omitted to be taken by it in good faith in accordance with a
    direction received by it pursuant to Section 7.05.

          (d) Whether or not therein expressly so provided, every provision of
this Indenture that in any way relates to the Trustee is subject to paragraph
(a), paragraph (b) and paragraph (c) of this Section 8.01.

          (e) No provision of this Indenture shall require the Trustee to expend
or risk its own funds or otherwise incur financial liability in the performance
of any of its duties hereunder or in the exercise of any of its rights or
powers, if the Trustee shall have reasonable grounds to believe that repayment
of such funds or adequate indemnity against such risk or liability is not
reasonably assured to it.

          (f) The Trustee shall not be liable for interest on any money received
by it except as the Trustee may agree in writing with Sterling.

           (g) Money held in trust by the Trustee need not be segregated from
other funds except to the extent required by law.

          (h) Every provision of this Indenture relating to the conduct or
affecting the liability of or affording protection to the Trustee shall be
subject to the provisions of this Section 8.01 and to the provisions of the TIA.

Section 8.02.  Rights of Trustee.

          (a) The Trustee may rely upon any document reasonably believed by it
to be genuine and to have been signed or presented by the proper Person. The
Trustee need not investigate any fact or matter stated in any such document.

          (b) Before the Trustee acts or refrains from taking any act, the
Trustee may require an Officers' Certificate or an Opinion of Counsel or both.
The Trustee shall not be liable for any action taken or omitted to be taken by
it in good faith in reliance on such Officers' Certificate or such Opinion of
Counsel.

          (c) The Trustee may act through agents and shall not be responsible
for the misconduct or negligence of any agent; provided, however, that any such
agent is appointed by the Trustee with due care.

          (d) The Trustee shall not be liable for any action taken or omitted to
be taken by it in good faith which it reasonably believes to be authorized or
within its rights or powers conferred upon it by this Indenture; provided,
however, that the Trustee's conduct does not constitute negligence, willful
misconduct or bad faith.

                                       48
<PAGE>
 
          (e) The Trustee may consult with counsel, and the advice or opinion of
counsel with respect to legal matters shall be full and complete authorization
and protection from liability in respect to any action taken, omitted or
suffered by the Trustee hereunder in good faith and in accordance with the
advice or opinion of such counsel.

Section 8.03.  Individual Rights of Trustee.

          The Trustee in its individual or any other capacity may become the
owner or pledgee of Notes and may otherwise deal with Sterling or any Affiliate
of Sterling with the same rights as it would have if the Trustee were not the
Trustee hereunder. However, in the event the Trustee acquires any conflicting
interest in accordance with the TIA it must eliminate such conflicting interest
within 90 days, apply to the SEC for permission to continue as Trustee or
resign.  Any Paying Agent, Registrar or co-registrar may do the same with like
rights.  The Trustee shall at all times remain subject to Section 8.10 and
Section 8.11.

Section 8.04.  Trustee's Disclaimer.

          The Trustee shall not be responsible for and makes no representation
as to the validity or adequacy of this Indenture or the Notes, it shall not be
accountable for Sterling's use of the proceeds of the Notes and it shall not be
responsible for any statement contained herein or any statement contained in the
Notes or any other document in connection with the sale of the Notes or pursuant
to this Indenture other than the Trustee's certificates of authentication.

Section 8.05.  Notice of Default.

          If a Default occurs and is continuing and if such Default is known to
a Responsible Officer of the Trustee, the Trustee shall mail to each Holder of a
Note a notice of such Default within 90 days (or such shorter period as may be
required by applicable law) after such Default occurs.  Except in the case of a
Default in payment of principal of, premium, if any, or interest on any Note,
the Trustee may withhold the notice if and so long as a committee of its
Responsible Officers in good faith determines that withholding the notice is in
the interests of the Holders of the Notes.

Section 8.06.  Reports by Trustee to Holders of Notes.

          Within 60 days after each May 15, beginning with May 15 following the
date of this Indenture, the Trustee shall mail to Holders of the Notes a brief
report dated as of such reporting date that complies with TIA Section 313(a) to
the extent such a report is required by TIA Section 313(a). The Trustee also
shall comply with TIA Section 313(b).

          A copy of each report at the time of its mailing to the Holders of
Notes shall be mailed to Sterling and filed with the SEC and each stock exchange
on which the Notes may be listed.  Sterling shall promptly notify the Trustee
upon the Notes being listed on any stock exchange and any delisting thereof.

                                       49
<PAGE>
 
Section 8.07.  Compensation and Indemnity.

          Sterling shall pay to the Trustee from time to time reasonable
compensation for the Trustee's acceptance of this Indenture and its services
hereunder.  The Trustee's compensation shall not be limited by any law on
compensation of a trustee of an express trust. Sterling shall reimburse the
Trustee for all reasonable out-of-pocket expenses incurred or made by it in the
course of its services hereunder.  Such expenses shall include the reasonable
compensation and expenses, disbursements and advances of the Trustee's agents,
counsel, accountants and experts.

          Sterling shall indemnify the Trustee against any and all loss,
liability or reasonable expense incurred by it in connection with the
administration of this trust and the performance of its duties under this
Indenture, except any such loss, liability or expense attributable to the
negligence, willful misconduct or bad faith of the Trustee.

          The Trustee shall notify Sterling promptly of any claim for which it
may seek indemnity. Failure by the Trustee to so notify Sterling shall not
relieve Sterling of its obligations hereunder except to the extent that Sterling
may be materially prejudiced by such failure.  Sterling shall defend the claim
and the Trustee shall cooperate in the defense of such claim.  The Trustee may
have separate counsel and Sterling shall pay the reasonable fees and expenses of
such counsel.  Sterling need not reimburse any expense or indemnify against any
loss, liability or expense incurred by the Trustee through the Trustee's own
negligence, willful misconduct or bad faith.  Sterling need not pay for any
settlement made without its consent, which consent shall not be unreasonably
withheld.

          Sterling's payment obligations under this Section 8.07 shall survive
the satisfaction and discharge of this Indenture.

          To secure Sterling's payment obligations under this Section 8.07, the
Trustee shall have a Lien prior to the Notes on all money or property held or
collected by the Trustee, except such money or property that is held by it in
trust for the benefit of Holders of Notes to pay principal and interest on
particular Notes.

          If the Trustee shall incur expenses after the occurrence of a Default
specified in Section 7.01(vii) or Section 7.01(viii), such expenses (including
the reasonable fees and expenses of its agents and counsel) are intended to
constitute expenses of administration under Bankruptcy Law.

Section 8.08.  Replacement of Trustee.

          A resignation or removal of the Trustee and appointment of a successor
Trustee shall become effective only upon the successor Trustee's acceptance of
appointment as provided in this Section 8.08.

          The Trustee may resign at any time and be discharged from the trust
hereby created by so notifying Sterling in writing. The Holders of Notes of not
less than a majority in principal amount of the Notes then outstanding may
remove the Trustee by so notifying the Trustee and Sterling in writing. Sterling
shall remove the Trustee if:

           (i) the Trustee fails to comply with Section 8.10;

                                       50
<PAGE>
 
           (ii) the Trustee is adjudged bankrupt or insolvent;

           (iii)  a Custodian or other public officer takes charge of the
    Trustee or its property; or

           (iv) the Trustee otherwise becomes incapable of acting.

          If the Trustee resigns or is removed or if a vacancy exists in the
office of Trustee for any reason (the Trustee in such event being referred to
herein as the retiring Trustee), Sterling shall promptly appoint a successor
Trustee.  Within one year after the successor Trustee takes office, the Holders
of a majority in principal amount of the then outstanding Notes may appoint a
successor Trustee to replace the successor Trustee appointed by Sterling.

          If a successor Trustee does not take office within 60 days after the
retiring Trustee resigns or is removed, the retiring Trustee, Sterling or the
Holders of Notes of at least 10% in principal amount of the then outstanding
Notes may petition any court of competent jurisdiction for the appointment of a
successor Trustee.

          If the Trustee after written request by any Holder of a Note who has
been a Holder of a Note for at least six months fails to comply with Section
8.10, such Holder of a Note may petition any court of competent jurisdiction for
the removal of the Trustee and the appointment of a successor Trustee.

          Any successor Trustee shall deliver a written acceptance of its
appointment to the retiring Trustee and to Sterling. Thereupon, the resignation
or removal of the retiring Trustee shall become effective, and the successor
Trustee shall have all of the rights, powers and duties of the Trustee under
this Indenture. The successor Trustee shall mail a notice of its succession to
Holders of the Note.  The retiring Trustee shall promptly transfer all property
held by it as Trustee to the successor Trustee, subject to the Lien provided for
in Section 8.07. Notwithstanding replacement of the Trustee pursuant to this
Section 8.08, Sterling's obligations under Section 8.07 shall continue for the
benefit of the retiring Trustee.

Section 8.09.  Successor Trustee by Merger, Etc.

          If the Trustee consolidates with, merges or converts into, or
transfers all or substantially all of its corporate trust business or assets to,
another corporation or banking association, the resulting, surviving or
transferee entity without any further act shall constitute the successor
Trustee; provided, however, that such entity shall be otherwise qualified and
eligible under this Article VIII.

          In case at the time such successor or successors by merger, conversion
or consolidation to the Trustee shall succeed to the trusts created by this
Indenture any of the Notes shall have been authenticated but not delivered, any
such successor to the Trustee may adopt the certificate of authentication of any
predecessor Trustee, and deliver such Notes so authenticated, and in case at
that time any of the Notes shall not have been authenticated, any successor to
the Trustee may authenticate such Notes either in the name of any predecessor
hereunder or in the name of the successor to the Trustee; and in all such cases
such certificates shall have the full force which it is anywhere in the Notes or
in this Indenture provided that the certificate of the Trustee shall have.

                                       51
<PAGE>
 
Section 8.10.  Eligibility; Disqualification.

          This Indenture at all times shall have a Trustee which satisfies the
requirements of TIA 310(a).  Trustee shall be a corporation organized and doing
business under the laws of the United States of America or of any State thereof
authorized under such laws to exercise corporate trustee power, shall be subject
to supervision or examination by federal or state authority and shall have a
combined capital and surplus of at least $50 million as set forth in its most
recently published annual report of condition.  The Trustee shall be subject to
TIA Section 310(b).

Section 8.11.  Preferential Collection of Claims Against Sterling.

          The Trustee shall comply with TIA Section 311(a), excluding any
creditor relationship listed in TIA Section 311(b). A Trustee which has resigned
or been removed shall be subject to TIA Section 311(a) to the extent indicated
therein.


                                   ARTICLE IX

                       DISCHARGE OF INDENTURE; DEFEASANCE

Section 9.01.  Discharge of Liability on Notes; Defeasance.

          (a) When (i) Sterling delivers to the Trustee all outstanding Notes
(other than Notes replaced pursuant to Section 2.07) for cancellation; or (i)
all outstanding Notes have become due and payable, whether at maturity or as a
result of the mailing of a notice of redemption pursuant to Article III of this
Indenture and Sterling irrevocably deposits with the Trustee funds sufficient to
pay at maturity or upon redemption all outstanding Notes including interest
thereon to maturity or such redemption date (other than Notes replaced pursuant
to Section 2.07), and if in either case Sterling pays all other sums payable
hereunder by Sterling, then this Indenture shall, subject to Section 9.01(c),
cease to be of further effect.  The Trustee shall acknowledge satisfaction and
discharge of this Indenture on demand of Sterling accompanied by an Officers'
Certificate and an Opinion of Counsel and at the cost and expense of Sterling.

          (b) Subject to Section 9.01(c) and Section 9.02, Sterling at any time
may terminate (i) all of Sterling obligations under the Notes and this Indenture
("legal defeasance"); or (ii) its obligations under Article IV, Section 5.02,
Section 5.03, Section 5.04, Section 5.05, Section 5.06, Section 5.07, Section
5.08, Section 5.09, Section 5.10, Section 5.11, Section 6.01(iii), Section
6.01(iv), Section 7.01(iv), Section 7.01(vi), Section 7.01(vii) (with respect
only to Significant Subsidiaries), Section 7.01(viii) (with respect only to
Significant Subsidiaries) and Section 7.01(ix) ("covenant defeasance").
Sterling may exercise its legal defeasance option notwithstanding its prior
exercise of its covenant defeasance option.

          If Sterling exercises its legal defeasance option, payment of the
Notes may not be accelerated because of an Event of Default.  If Sterling
exercises its covenant defeasance option, payment of the Notes may not be
accelerated because of an Event of Default specified in Section 7.01 (iv),
Section 7.01(vi), Section 7.01(vii) (with respect only to Significant
Subsidiaries), Section 7.01(viii) (with respect only to Significant
Subsidiaries), Section 7.01(ix) or the failure of Sterling to comply with
Article IV.

                                       52
<PAGE>
 
          Upon satisfaction of the conditions set forth herein and at the
request of Sterling, the Trustee shall acknowledge in writing the discharge of
those obligations of Sterling terminated thereby.

          (c) Notwithstanding clause (a) and clause (b) above, Sterling's
obligations contained in Section 2.03, Section 2.04, Section 2.05, Section 2.06,
Section 2.07, Section 8.07, Section 8.08 and this Article IX shall survive until
the Notes have been paid in full.  Thereafter, Sterling's obligations contained
in Section 8.07, Section 9.04 and Section 9.05 shall survive.

Section 9.02.  Conditions to Defeasance.

           Sterling may exercise its legal defeasance option or its covenant
defeasance option only if:

           (i) Sterling irrevocably deposits in trust with the Trustee money or
    U.S. Government Obligations for the payment of principal, premium (if any)
    and interest on the Notes to maturity or redemption, as the case may be;

           (ii) Sterling delivers to the Trustee a certificate from a nationally
    recognized firm of independent accountants expressing their opinion that the
    payments of principal and interest when due and without reinvestment on the
    deposited U.S. Government Obligations plus any deposited money without
    investment will provide cash at such times and in such amounts as will be
    sufficient to pay principal and interest when due on all the Notes to
    maturity or redemption, as the case may be;

           (iii)  91 days pass after the deposit is made and during the 91-day
    period no Default specified in Section 7.01(vii) or Section 7.01(viii) in
    either case with respect to Sterling occurs which is continuing at the end
    of the period;

           (iv) the deposit does not constitute a default under any other
    agreement binding on Sterling and is not prohibited by Article XI;

           (v) Sterling delivers to the Trustee an Opinion of Counsel to the
    effect that the trust resulting from the deposit does not constitute, or is
    qualified as, a regulated investment company under the U.S. Investment
    Company Act of 1940, as amended;

           (vi) in the case of the legal defeasance option, Sterling shall have
    delivered to the Trustee an Opinion of Counsel in the United States stating
    that (1) Sterling has received from, or there has been published by, the
    Internal Revenue Service a ruling, or (2) since the date of this Indenture
    there has been a change in the applicable U.S. Federal income tax law, in
    either case to the effect that, and based thereon such Opinion of Counsel
    shall confirm that, the Holders of Notes will not recognize income, gain or
    loss for U.S. Federal income tax purposes as a result of such defeasance and
    will be subject to U.S. Federal income tax on the same amounts, in the same
    manner and at the same times as would have been the case if such defeasance
    had not occurred;

           (vii)  in the case of the covenant defeasance option, Sterling shall
    have delivered to the Trustee an Opinion of Counsel in the United States to
    the effect that the Holders of Notes will not recognize income, gain or loss
    for U.S. Federal income tax purposes as a result of such covenant defeasance
    and will be subject to U.S. Federal income tax on the

                                       53
<PAGE>
 
    same amounts, in the same manner and at the same times as would have been
    the case if such covenant defeasance had not occurred; and

           (viii)  Sterling delivers to the Trustee an Officers' Certificate and
    an Opinion of Counsel, each stating that all conditions precedent to the
    defeasance and discharge of the Notes as contemplated by this Article IX
    have been complied with.

          Before or after a deposit, Sterling may make arrangements satisfactory
to the Trustee for the redemption of the Notes at a future date in accordance
with Article III.

Section 9.03.  Application of Trust Money.

          The Trustee shall hold in trust money or U.S. Government Obligations
deposited with it pursuant to this Article IX.  The Trustee shall apply the
deposited money and the money from U.S. Government Obligations through the
Paying Agent and in accordance with this Indenture to the payment of principal
of, and premium, if any, and interest on, the Notes.

Section 9.04.  Repayment to Sterling.

          The Trustee and the Paying Agent shall promptly turn over to Sterling
upon request any excess money or securities held by them at any time.

          Subject to any applicable abandoned property law, the Trustee and the
Paying Agent shall pay to Sterling upon request any money held by them for the
payment of principal or interest that remains unclaimed for two years, and,
thereafter, Holders of Notes entitled to the money shall look to Sterling for
payment as general creditors.

Section 9.05.  Indemnity for Government Obligations.

          Sterling shall pay and indemnify the Trustee against any tax, fee or
other charge imposed on or assessed against deposited U.S. Government
Obligations or the principal and interest received on such U.S. Government
Obligations.

Section 9.06.  Reinstatement.

          If the Trustee or Paying Agent is unable to apply any money or U.S.
Government Obligations in accordance with this Article IX by reason of any legal
proceeding or by reason of any order or judgment of any court or governmental
authority enjoining, restraining or otherwise prohibiting such application,
Sterling's obligations under this Indenture and the Notes shall be revived and
reinstated as though no deposit had occurred pursuant to this Article IX until
such time as the Trustee or Paying Agent is permitted to apply all such money or
U.S. Government Obligations in accordance with this Article IX; provided,
however, that, if Sterling has made any payment of interest on or principal of
any of the Notes because of the reinstatement of its obligations, Sterling shall
be subrogated to the rights of the Holders of such Notes to receive such payment
from the money or U.S. Government Obligations held by the Trustee or Paying
Agent.

                                       54
<PAGE>
 
                                 ARTICLE X

                        AMENDMENT, SUPPLEMENT AND WAIVER

Section 10.01.  Without Consent of Holders of Notes.

           Sterling and the Trustee may amend or supplement this Indenture or
the Notes without the consent of any Holder of a Note:

           (i) to cure any ambiguity, omission, defect or inconsistency;

           (ii) to provide for the assumption of Sterling's obligations to the
    Holders of the Notes in the case of a merger or consolidation pursuant to
    Article VI;

           (iii)  to provide for uncertificated Notes in addition to or in place
    of certificated Notes (provided that the uncertificated Notes are issued in
    registered form for purposes of Section 163(f) of the Code, or in a manner
    such that the uncertificated Notes are described in Section 163(f)(2)(B) of
    the Code);

           (iv) to add guarantees with respect to the Notes;

           (v) to add to the covenants of Sterling and its Subsidiaries
    hereunder for the benefit of the Holders of Notes or to surrender any right
    or power conferred upon Sterling;

           (vi) to make any change that would provide any additional rights or
    benefits to the Holders of the Notes or that does not adversely affect the
    rights hereunder of any Holder of a Note; or

           (vii)  to comply with requirements of the SEC in order to effect or
    maintain the qualification of this Indenture under the TIA.

          Upon the request of Sterling accompanied by a resolution of the Board
of Directors authorizing the execution of any such amended or supplemental
Indenture, and upon receipt by the Trustee of the documents described in Section
10.06, the Trustee shall join with Sterling in the execution of any amended or
supplemental Indenture authorized or permitted by the terms of this Indenture
and to make any further appropriate agreements and stipulations which may be
contained therein, but the Trustee shall not be obligated to enter into such
amended or supplemental Indenture which affects its own rights, duties or
immunities under this Indenture or otherwise.

          After an amendment, supplement or waiver under this Section 10.01
becomes effective, Sterling shall mail to the Holders of Notes affected thereby
a notice briefly describing any such amendment, supplement or waiver.  Any
failure of Sterling to mail such notice, or any defect therein, shall not in any
way impair or affect the validity of any such amended or supplemental Indenture
or waiver.  Subject to Section 7.04 and Section 7.07, the Holders of a majority
in aggregate principal amount of the Notes then outstanding may waive compliance
by Sterling in any particular instance with any provision of this Indenture or
the Notes.

                                       55
<PAGE>
 
Section 10.02.  With Consent of Holders of Notes.

          Sterling and the Trustee may amend or supplement this Indenture, the
Notes or any amended or supplemental Indenture with the written consent of the
Holders of Notes of at least a majority in aggregate principal amount of the
Notes then outstanding, and any existing Default and its consequences or
compliance with any provision of this Indenture or the Notes may be waived with
the consent of the Holders of a majority in principal amount of the Notes then
outstanding.  However, without the consent of each Holder of a Note affected,
any amendment, supplement or waiver may not:

           (i) reduce the amount of Notes the Holders of which must consent to
    an amendment;

           (ii) reduce the rate of or extend the time for payment of interest on
    any Note;

           (iii)  reduce the principal of or extend the Stated Maturity of any
    Note (except that Sterling's obligations to make an offer to repurchase the
    Notes as a result of a Change of Control may be waived or modified with the
    prior written consent of the Holders of a majority in principal amount of
    the Notes);

           (iv) reduce the premium payable upon the redemption of any Note or
    change the time at which any Note may be redeemed in accordance with Article
    III;

           (v) make any Notes payable in money other than that stated in the
    Note;

           (vi) impair the right of any Holder of a Note to receive payment of,
    principal of and interest on such Holder's Notes on or after the due dates
    therefor or to institute suit for the enforcement of any payment on or with
    respect to such Holder's Notes;

           (vii)  make any change in Section 7.04 or Section 7.07 or the second
    sentence of this Section 10.02; or

           (viii)  make any change in any material provision of Article XI that
    adversely affects the interests of any Holder of a Note.


          Upon the request of Sterling accompanied by a resolution of the Board
of Directors authorizing the execution of any such amended or supplemental
Indenture, and upon the filing with the Trustee of evidence satisfactory with
the Trustee of the consent of the Holders of Notes as aforesaid and upon receipt
by the Trustee of the documents described in Section 10.06, the Trustee shall
join with Sterling in the execution of such amended or supplemental Indenture
unless such amended or supplemental Indenture affects the Trustee's own rights,
duties or immunities under this Indenture or otherwise, in which case the
Trustee may in its discretion, but shall not be obligated to, enter into such
amended or supplemental Indenture.

          It shall not be necessary for the consent of the Holders of Notes
under this Section 10.02 to approve the particular form of any proposed
amendment, supplement or waiver, but it shall be sufficient if such consent
approves the substance thereof.

                                       56
<PAGE>
 
          After an amendment, supplement or waiver under this Section 10.02
becomes effective, Sterling shall mail to the Holders of Notes affected thereby
a notice briefly describing any such amendment, supplement or waiver.  Any
failure of Sterling to mail such notice, or any defect therein, shall not in any
way impair or affect the validity of any such amended or supplemental Indenture
or waiver.  Subject to Section 7.04 and Section 7.07, the Holders of a majority
in aggregate principal amount of the Notes then outstanding may waive compliance
by Sterling in any particular instance with any provision of this Indenture or
the Notes.

Section 10.03.  Compliance with Trust Indenture Act.

          Every amendment or supplement to this Indenture or the Notes shall be
set forth in an amended or supplemental Indenture that complies with the TIA as
then in effect.

Section 10.04.  Revocation and Effect of Consents and Waivers.

          Until an amendment, supplement or waiver becomes effective, a consent
to such amendment, supplement or waiver by a Holder of a Note is a continuing
and binding consent by the Holder of a Note and every subsequent Holder of a
Note or portion of a Note that evidences the same Debt as the consenting
Holder's Note, even if a notation of the consent or waiver is not made on any
Note.  However, any such Holder of a Note or subsequent Holder of a Note may
revoke the consent as to its Note if the Trustee receives written notice of
revocation before the date the waiver, supplement or amendment becomes
effective.  An amendment, supplement or waiver shall become effective in
accordance with its terms and thereafter shall bind every Holder of a Note.

          Sterling may, but shall not be obligated to, fix a record date for the
purpose of determining the Holders of Notes entitled to give their consent or
take any other action described above or required or permitted to be taken
pursuant to this Indenture.  If a record date is fixed, then notwithstanding the
immediately preceding paragraph, such Persons which were Holders of Notes at
such record date (or their duly designated proxies), and only such Persons,
shall be entitled to give such consent or to revoke any consent previously given
or to take any such action, whether or not such Persons continue to be Holders
of Notes after such record date.  No such consent shall be valid or effective
for more than 120 days after such record date.

Section 10.05.  Notation On or Exchange of Notes.

          If an amendment or supplement changes the terms of a Note, the Trustee
may require the Holder of such Note to deliver such Note to the Trustee.  The
Trustee may place an appropriate notation on the Note regarding the changed
terms and return it to the Holder of such Note.  Alternatively, if Sterling or
the Trustee so determines, Sterling in exchange for such Note shall issue and
the Trustee shall authenticate a new Note that reflects such changed terms.
Failure to make the appropriate notation or to issue a new Note shall not affect
the validity of such amendment or supplement.

Section 10.06.  Trustee to Sign Amendments, Etc.

          The Trustee shall sign any amended or supplemental Indenture
authorized pursuant to this Article X if the amendment or supplement does not
adversely affect the rights, duties, liabilities or immunities of the Trustee.
If it does, the Trustee may but need not sign it.  In signing such amendment or
supplement the Trustee shall be entitled to receive, and (subject

                                       57
<PAGE>
 
to Section 8.01) shall be fully protected in relying upon, an Officer's
Certificate and an Opinion of Counsel stating that such amendment or supplement
is authorized or permitted pursuant to this Indenture.  Sterling shall not sign
any amendment or supplemental Indenture until the Board of Directors approves
any such amendment or supplemental Indenture.

Section 10.07.  Payment for Consents.

          Sterling shall not, and shall not permit any of its Subsidiaries to,
directly or indirectly, pay or cause to be paid any consideration, whether by
way of interest, fee or otherwise, to any Holder of any Note for or as an
inducement to any consent, amendment, supplement or waiver with respect to any
term or provision of this Indenture or the Notes, unless such consideration is
offered to be paid or agreed to be paid to all Holders of Notes that consent,
waive or agree to amend or supplement in the time frame set forth in the
solicitation documents relating to any such consent, waiver or agreement to
amend or supplement.


                                   ARTICLE XI

                             SUBORDINATION OF NOTES

Section 11.01.  Notes Subordinate to Senior Debt; Notes Pari Passu with Senior
Subordinated Debt.

          Sterling covenants and agrees, and each Holder of a Note, by its
acceptance thereof, likewise covenants and agrees, that, to the extent and in
the manner hereinafter set forth in this Article XI, the payment of the
principal of and premium, if any, and interest on each and all of the Notes are
hereby expressly made subordinate and subject in right of payment to the prior
payment in full of all Senior Debt of Sterling.  All provisions of this Article
XI shall be subject to Section 11.14 hereof.  The Notes shall rank pari passu in
right of payment with all Senior Subordinated Debt of Sterling.

Section 11.02.  Payment Over of Proceeds Upon Dissolution, Etc.

          In the event of (i) any insolvency or bankruptcy case or proceeding,
or any receivership, liquidation, reorganization or other similar case or
proceeding in connection therewith, relative to Sterling or to its creditors, as
such, or to its assets; or (ii) any liquidation, dissolution or other winding up
of Sterling, whether voluntary or involuntary and whether or not involving
insolvency or bankruptcy; or (iii) any assignment for the benefit of creditors
or any other marshalling of assets or liabilities of Sterling, then and in any
such event specified in clause (i), clause (ii) or clause (iii) above (each such
event, if any, herein sometimes referred to as a "Proceeding") the holders of
Senior Debt of Sterling will be first entitled to receive payment in full of all
amounts due or to become due on or in respect of all Senior Debt of Sterling, or
provision shall be made for such payment, in cash or cash equivalents or
otherwise in a manner satisfactory to the holders of such Senior Debt, before
the Holders of the Notes are entitled to receive any payment or distribution of
any kind or character, on account of principal of (or premium, if any) or
interest on or other obligations in respect of the Notes or on account of any
purchase or other acquisition of Notes by Sterling (all such payments,
distributions, purchases and acquisitions herein referred to, individually and
collectively, as a "Notes Payment"), and to that end the holders of Senior Debt
of Sterling shall be entitled to receive, for application to the

                                       58
<PAGE>
 
payment thereof, any Notes Payment which may be payable or deliverable in
respect of the Notes in any such Proceeding.

          In the event that, notwithstanding the foregoing provisions of this
Section 11.02, the Trustee receives payment or distribution of assets of
Sterling of any kind or character, before all the Senior Debt of Sterling is
paid in full in cash or cash equivalents, then and in such event, subject to
Section 11.04, such Notes Payment shall be paid over or delivered forthwith to
the trustee in bankruptcy, receiver, liquidating trustee, custodian, assignee,
agent or other person making payment or distribution of assets of Sterling for
application to the payment of all Senior Debt of Sterling remaining unpaid, to
the extent necessary to pay the Senior Debt of Sterling in full in cash or cash
equivalents, after giving effect to any concurrent payment or distribution to or
for the holders of Senior Debt of Sterling.

          For purposes of this Article XI only, the words "any payment or
distribution of any kind or character" shall not be deemed to include a payment
or distribution of stock or securities of Sterling provided for by a plan of
reorganization or readjustment authorized by an order or decree of a court of
competent jurisdiction in a reorganization proceeding under any applicable
bankruptcy law or of any other corporation provided for by such plan of
reorganization or readjustment which stock or securities are subordinated in
right of payment to all then outstanding Senior Debt of Sterling, to at least
the same extent as the Notes are so subordinated as provided in this Article XI;
provided that (1) if a new corporation results from such reorganization or
readjustment, such corporation assumes any Senior Debt of Sterling not paid in
full in cash or cash equivalents in connection with such reorganization or
readjustment; and (2) the rights of the holders of such Senior Debt are not,
without the consent of such holders, altered by such reorganization or
readjustment.  The consolidation of Sterling with, or the merger of Sterling
into, another person or the liquidation or dissolution of Sterling following the
convey ance or transfer of all or substantially all of its properties and assets
as an entirety to another person upon the terms and conditions set forth in
Article VI shall not be deemed a Proceeding for the purposes of this Section
11.02 if the person formed by such consolidation or into which Sterling is
merged or the person which acquires by conveyance or transfer such properties
and assets as an entirety, as the case may be, shall, as part of such
consolidation, merger, conveyance or transfer, comply with the conditions set
forth in Article VI.

Section 11.03.  No Payment When Senior Debt in Default.

          In the event that any Senior Payment Default (as defined below) shall
have occurred and be continuing, then Sterling may not make any Notes Payment
unless and until such Senior Payment Default shall have been cured or waived or
shall have ceased to exist or all amounts then due and payable in respect of
Designated Senior Debt shall have been paid in full, or provision shall have
been made for such payment, in cash or cash equivalents or otherwise in a manner
satisfactory to the holders of such Designated Senior Debt.  The term "Senior
Payment Default" means any default in the payments of principal of (or premium,
if any) or interest on any Designated Senior Debt of Sterling when due, whether
at the maturity thereof or by declaration or acceleration, call for redemption
or otherwise.

          In the event that any Senior Nonmonetary Default (as defined below)
shall have occurred and be continuing, then, upon the receipt by Sterling and
the Trustee of written notice of such Senior Nonmonetary Default from the
representatives of holders of the Designated Senior Debt to which such default
relates, Sterling may not make any Notes Payment for a period (the "blockage
period") commencing on the date Sterling and Trustee receive such written notice
and

                                       59
<PAGE>
 
ending 179 days after the date of such receipt of such written notice (or
earlier) if terminated (i) by written notice to the Trustee and Sterling from
the representative of holders of Designated Senior Debt that gave such written
notice; (ii) because such Designated Senior Debt has been repaid in full; or
(iii) because such default is no longer continuing).  In any event, not more
than one blockage period may be commenced during any period of 360 consecutive
days and there shall be a period of at least 181 consecutive days in each period
of 360 consecutive days when no blockage period is in effect.  For all purposes
of this paragraph, no Senior Nonmonetary Default that existed or was continuing
on the date of commencement of any blockage period with respect to the
Designated Senior Debt initiating such blockage period will be, or can be, made
the basis for the commencement of a subsequent blockage period unless such
default has been cured or waived for a period of not less than 90 consecutive
days.  The term "Senior Nonmonetary Default" means the occurrence or existence
and continuance of any event of default, or of any event which, after notice or
lapse of time (or both), would become an event of default, under the terms of
any instrument pursuant to which any Designated Senior Debt is outstanding,
permitting (after notice or lapse of time or both) one or more holders of such
Senior Debt (or a trustee or agent on behalf of the holders thereof) to declare
such Senior Debt due and payable prior to the date on which it should otherwise
become due and payable, other than a Senior Payment Default.

          In the event that, notwithstanding the foregoing, Sterling shall make
any Notes Payment to the Trustee or any Holder prohibited by the foregoing
provisions of this Section 11.03, then and in such event, subject to Section
11.04, such Notes Payment shall be paid over and delivered forthwith to the
holders of the Senior Debt of Sterling remaining unpaid, to the extent necessary
to pay in full all the Senior Debt of Sterling.

          The provisions of this Section 11.03 shall not apply to any Notes
Payment with respect to which Section 11.02 would be applicable.

Section 11.04.  Payment Permitted If No Default.

          Nothing contained in this Article XI or elsewhere in this Indenture or
in any of the Notes shall prevent (i) Sterling, at any time except during the
pendency of any Proceeding referred to in Section 11.02 or under the conditions
described in Section 11.03, from making Notes Payments; or (ii) the application
by the Trustee of any money deposited with it hereunder to Notes Payments or the
retention of such Notes Payment by the Holders, if, at the time of such
application by the Trustee, it did not have knowledge that such Notes Payment
would have been prohibited by the provisions of this Article XI.

Section 11.05.  Subrogation to Rights of Holders of Senior Debt.

          Subject to the payment in full of all amounts due or to become due on
or in respect of Senior Debt of Sterling, or the provision for such payment, in
cash or cash equivalents or otherwise in a manner satisfactory to the holders of
Senior Debt of Sterling, the Holders of the Notes shall be subrogated (equally
and ratably with the holders of all Debt of Sterling, if any, which by its
express terms is subordinated to Senior Debt of Sterling to substantially the
same extent as the Notes are subordinated to the Senior Debt of Sterling and is
entitled to like rights of subrogation by reason of any payments or
distributions made to holders of such Senior Debt) to the rights of the holders
of such Senior Debt of Sterling to receive payments and distributions of cash,
property and securities applicable to the Senior Debt of Sterling until the
principal of (and premium, if any) and interest on the Notes shall be paid in
full.  For purposes of such

                                       60
<PAGE>
 
subrogation, no payments or distributions to the holders of the Senior Debt of
Sterling of any cash, property or securities to which the Holders of the Notes
or the Trustee would be entitled except for the provisions of this Article XI,
and no payments over pursuant to the provisions of this Article XI to the
holders of Senior Debt of Sterling by Holders of the Notes or the Trustee,
shall, as among Sterling, its creditors other than holders of Senior Debt and
the Holders of the Notes, be deemed to be a payment or distribution by Sterling
to or on account of the Senior Debt of Sterling.

Section 11.06.  Provisions Solely to Define Relative Rights.

          The provisions of this Article XI are and are intended solely for the
purpose of defining the relative rights of the Holders of Notes on the one hand
and the holders of Senior Debt of Sterling on the other hand.  Nothing contained
in this Article XI or elsewhere in this Indenture or in the Notes is intended to
or shall (i) impair, as among Sterling, its creditors other than holders of
Senior Debt and the Holders of the Notes, the obligation of Sterling, which is
absolute and unconditional, to pay to the Holders of the Notes the principal of
(and premium, if any) and interest on the Notes as and when the same shall
become due and payable in accordance with their terms; or (ii) affect the
relative rights against Sterling of the Holders of the Notes and creditors of
Sterling other than the holders of Senior Debt; or (iii) prevent the Trustee or
the Holder of any Note from exercising all remedies otherwise permitted by
applicable law upon default under this Indenture, subject to the rights, if any,
under this Article XI of the holders of Senior Debt of Sterling to receive cash,
property and securities otherwise payable or deliverable to the Trustee or such
Holder.

Section 11.07.  Trustee to Effectuate Subordination.

          Each Holder of a Note by such Holder's acceptance thereof authorizes
and directs the Trustee on such Holder's behalf to take such action as may be
necessary or appropriate to effectuate the subordination provided in this
Article XI and appoints the Trustee his attorney-in-fact for any and all such
purposes.

Section 11.08.  No Waiver of Subordination Provisions.

          No right of any present or future holder of any Senior Debt of
Sterling to enforce subordination as herein provided shall at any time in any
way be prejudiced or impaired by any act or failure to act on the part of
Sterling or by any act or failure to act, in good faith, by any such holder, or
by any noncompliance by Sterling with the terms, provisions and covenants of
this Indenture, regardless of any knowledge thereof any such holder may have or
be otherwise charged with.

          Without in any way limiting the generality of the foregoing paragraph,
the holders of Senior Debt of Sterling may, at any time and from time to time,
without the consent of or notice to the Trustee or the Holders of the Notes,
without incurring responsibility to the Holders of the Notes and without
impairing or releasing the subordination provided in this Article XI or the
obligations hereunder of the Holders of the Notes to the holders of Senior Debt,
do any one or more of the following:  (i) change the manner, place or terms of
payment or extend the time of payment of, or renew, increase or alter, Senior
Debt, or otherwise amend or supplement in any manner Senior Debt or any
instrument evidencing the same or any agreement under which Senior Debt is
outstanding; (ii) sell, exchange, release or otherwise deal with any property
pledged, mortgaged or otherwise securing Senior Debt; (iii) release any person
liable in any

                                       61
<PAGE>
 
manner for the payment or collection of Senior Debt; and (iv) exercise or
refrain from exercising any rights against Sterling and any other person.

Section 11.09.  Notice to Trustee.

          Sterling shall give prompt written notice to the Trustee of any fact
known to Sterling which would prohibit the making of any payment to or by the
Trustee in respect of the Notes.  Notwithstanding the provisions of this Article
XI or any other provision of this Indenture, the Trustee shall not be charged
with knowledge of the existence of any facts which could prohibit the making of
any payment to or by the Trustee in respect of the Notes, unless and until the
Trustee shall have received written notice thereof specifically referencing this
Article XI from Sterling or a holder of Senior Debt of Sterling or from any
trustee therefor; and, prior to the receipt of any such written notice, the
Trustee, subject to the provisions of Section 8.01, shall be entitled in all
respects to assume that no such facts exist; provided, however, that if the
Trustee shall not have received the notice provided for in this Section 11.09 at
least two Business Days prior to the date upon which by the terms hereof any
money may became payable for any purpose (including, without limitation, the
payment of the principal of (and premium, if any) or interest on any Note),
then, anything herein contained to the contrary notwithstanding, the Trustee
shall have full power and authority to receive such money and to apply the same
to the purpose for which such money was received and shall not be affected by
any notice to the contrary which may be received by it within two Business Days
prior to such date.

          Subject to the provisions of Section 8.01, the Trustee shall be
entitled to rely on the delivery to it of a written notice by a person
representing himself to be a holder of Senior Debt of Sterling (or a trustee
therefor) to establish that such notice has been given by a holder of Senior
Debt of Sterling (or a trustee therefor).  In the event that the Trustee
determines in good faith that further evidence is required with respect to the
right of any person as a holder of Senior Debt of Sterling to participate in any
payment or distribution pursuant to this Article XI, the Trustee may request
each person to furnish evidence to the reasonable satisfaction of the Trustee as
to the amount of Senior Debt of Sterling held by such person, the extent to
which such person is entitled to participate in such payment or distribution and
any other facts pertinent to the rights of such person under this Article XI,
and if such evidence is not furnished, the Trustee may defer any payment to such
person pending judicial determination as to the right of such person to receive
such payment.

Section 11.10.  Reliance on Judicial Order or Certificate of Liquidating Agent.

          Upon any payment or distribution of assets of Sterling referred to in
this Article XI, the Trustee, subject to the provisions of Section 8.01, and the
Holders of the Notes shall be entitled to rely upon any order or decree entered
by any court of competent jurisdiction in which such Proceeding is pending, or a
certificate of the trustee in bankruptcy, receiver, liquidating trustee,
custodian, assignee for the benefit of creditors, agent or other person making
such payment or distribution, delivered to the Trustee or to the Holders of
Notes, for the purpose of ascertaining the persons entitled to participate in
such payment or distribution, the holders of the Senior Debt of Sterling and
other Debt of Sterling, the amount thereof or payable thereon, the amount or
amounts paid or distributed thereon and all other facts pertinent thereto or to
this Article XI.

                                       62
<PAGE>
 
Section 11.11.  Trustee Not Fiduciary for Holders of Senior Debt.

          The Trustee shall not be deemed to owe any fiduciary duty to the
holders of Senior Debt of Sterling and shall not be liable to any such holders
if it shall in good faith mistakenly pay over or distribute to Holders of Notes
or to Sterling or to any other person cash, property or securities to which any
holders of Senior Debt of Sterling shall be entitled by virtue of this Article
XI or otherwise.  With respect to the holders of Senior Debt of Sterling, the
Trustee undertakes to perform or to observe only such of its covenants or
obligations as are specifically set forth in this Article XI and no implied
covenants or obligations with respect to holders of Senior Debt of Sterling
shall be read into this Indenture against the Trustee.

Section 11.12.  Rights of Trustee as Holder of Senior Debt; Preservation of
Trustee's Rights.

          The Trustee in its individual capacity shall be entitled to all the
rights set forth in this Article XI with respect to any Senior Debt of Sterling
which may at any time be held by it, to the same extent as any other holder of
Senior Debt of Sterling, and nothing in this Indenture shall deprive the Trustee
of any of its rights as such holder.

           Nothing in this Article XI shall apply to claims of, or payments to,
the Trustee under or pursuant to Section 8.07.

Section 11.13.  Article XI Applicable to Paying Agents.

          In case at any time any Paying Agent other than the Trustee shall have
been appointed by Sterling and be then acting hereunder, the term "Trustee" as
used in this Article XI shall in such case (unless the context otherwise
requires) be construed as extending to and including such Paying Agent within
its meaning as fully for all intents and purposes as if such Paying Agent were
named in this Article XI in addition to or in place of the Trustee; provided,
however, that Section 11.12 shall not apply to Sterling or any Affiliate of
Sterling if it or such Affiliate acts as Paying Agent.

Section 11.14.  Trust Moneys Not Subordinated.

          Notwithstanding anything contained herein to the contrary, payments
from money or the proceeds of U.S. Government Obligations held in trust under
Article IX by the Trustee for the payment of principal of, and premium, if any,
and interest on, the Notes shall not be subordinated to the prior payment of any
Senior Debt or subject to the restrictions on this Article XI, and none of the
Trustee or the Holders shall be obligated to pay over any such amount to
Sterling or any holder of Senior Debt of Sterling or any other creditor of
Sterling.

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<PAGE>
 
                                 ARTICLE XII

                                 MISCELLANEOUS

Section 12.01.  Trust Indenture Act Controls.

          If any provision of this Indenture limits, qualifies or conflicts with
the duties imposed by TIA Section 318(c), such imposed duties shall control.

Section 12.02.  Notices.

          Any notice or communication by Sterling or the Trustee to the other is
duly given if in writing and delivered in person or mailed by first class mail
(registered or certified, return receipt requested), telex, telecopier or
overnight air courier guaranteeing next day delivery, to the other's address:

           If to Sterling:

                Sterling Chemicals, Inc.
                1200 Smith Street
                Suite 1900
                Houston, Texas  77002
                Telecopier No.:  (713) 654-9552
                Attention:  Jim P. Wise

           If to the Trustee:

                Fleet National Bank
                777 Main Street
                Hartford, Connecticut  06115
                Telecopier No:  (860) 986-7920
                Attention:  Corporate Trust Administration

          Sterling or the Trustee, by notice each to the other may designate
additional or different addresses for subsequent notices or communications.

          All notices and communications (other than those sent to Holders of
Notes) shall be deemed to have been duly given:  at the time delivered by hand,
if personally delivered; five Business Days after being deposited in the mail,
postage prepaid, if mailed; when answered back, if telexed; when receipt
acknowledged, if telecopied; and the next Business Day after timely delivery to
the courier, if sent by overnight air courier guaranteeing next day delivery.

          Any notice or communication to a Holder of a Note shall be mailed by
first class mail, certified or registered, return receipt requested, or by
overnight air courier guaranteeing next day delivery to its address shown on the
Note Register.  Any notice or communication shall also be so mailed to any
Person described in TIA Section 313(c), to the extent required by the TIA.
Failure to mail a notice or communication to a Holder of a Note or any defect in
such notice shall not affect its sufficiency with respect to other Holders of
Notes.

                                       64
<PAGE>
 
          If a notice or communication is mailed in the manner set forth above
within the time prescribed, such notice or communication shall be deemed to be
duly given whether or not the addressee receives it.

          If Sterling mails a notice or communication to Holders of Notes, it
shall mail a copy to the Trustee and each Agent at the same time.

Section 12.03.  Communication by Holders of Notes with Other Holders of Notes.

          Holders of Notes pursuant to TIA Section 312(b) may communicate with
other Holders of Notes with respect to their rights under this Indenture or the
Notes. Sterling, the Trustee, the Registrar, the Paying Agent and any other
Person shall have the protection of TIA Section 312(c).

Section 12.04.  Certificate and Opinion as to Conditions Precedent.

          Upon any request or application by Sterling to the Trustee to take any
action under this Indenture, Sterling shall furnish to the Trustee:

           (i) an Officers' Certificate in form and substance reasonably
    satisfactory to the Trustee stating that, in the opinion of the signers, all
    conditions and covenants, if any, provided for in this Indenture relating to
    the proposed action have been satisfied; and

           (ii) an Opinion of Counsel in form and substance reasonably
    satisfactory to the Trustee stating that, in the opinion of such counsel,
    all conditions and covenants have been satisfied.

Section 12.05.  Statements Required in Certificate or Opinion.

          Each certificate or opinion with respect to compliance with a
condition or covenant contained in this Indenture shall include:

           (i) a statement that the Person making such certificate or opinion
    has read such condition or covenant;

           (ii) a statement as to the nature and scope of the examination or
    investigation upon which the statements or opinions contained in such
    certificate or opinion are based;

           (iii)  a statement that, in the opinion of such Person, he or she has
    made such examination or investigation as is necessary to enable him or her
    to express an informed opinion as to whether such condition or covenant has
    been satisfied; and

           (iv) a statement as to whether, in the opinion of such Person, such
    condition or covenant has been satisfied.

Section 12.06.  Rules by Trustee and Agents.

          The Trustee may make reasonable rules for action by or at a meeting of
Holders of Notes.  The Registrar and Paying Agent may make reasonable rules and
set reasonable requirements for their functions.

                                       65
<PAGE>
 
Section 12.07.  No Personal Liability of Directors, Officers, Employees,
                Incorporators and Stockholders.

          No director, officer, employee, incorporator or stockholder of
Sterling, as such, shall have any liability for any obligations of Sterling
under the Notes or this Indenture or for any claim based on, in respect of, or
by reason of, such obligations.  Each Holder of a Note by accepting a Note
waives and releases all such liability. Such waiver and release form a part of
the consideration for issuance of the Notes.

Section 12.08.  Governing Law.

          THIS INDENTURE AND THE NOTES SHALL BE GOVERNED BY, AND CONSTRUED IN
ACCORDANCE WITH, THE LAWS OF THE STATE OF NEW YORK WITHOUT GIVING EFFECT TO
APPLICABLE PRINCIPLES OF CONFLICT OF LAW TO THE EXTENT THAT THE APPLICATION OF
THE LAW OF ANOTHER JURISDICTION WOULD BE REQUIRED THEREBY.

Section 12.09.  No Adverse Interpretation of Other Agreements.

          This Indenture may not be used to interpret another indenture, loan or
debt agreement of Sterling or its Subsidiaries.  Any such indenture, loan or
debt agreement may not be used to interpret this Indenture.

Section 12.10.  Successors.

          All agreements of Sterling contained in this Indenture and the Notes
shall bind Sterling and its successors.  All agreements of the Trustee in this
Indenture shall bind the Trustee and its successors.

Section 12.11.  Severability.

          In case any provision of this Indenture or the Notes shall be invalid,
illegal or unenforceable, the validity, legality and enforceability of the
remaining provisions shall not in any way be affected or impaired thereby.

Section 12.12.  Counterpart Originals.

          The parties may sign any number of copies of this Indenture.  Each
such signed copy shall be deemed to be an original, and all of such signed
copies together shall represent one and the same agreement.

Section 12.13.  Table of Contents, Headings, Etc.

          The Table of Contents, Cross-Reference Table and Headings of the
Articles and Sections of this Indenture have been inserted for convenience only,
and shall not, for any reason, be deemed to be part of this Indenture and shall
in no way modify or restrict any of the terms or provisions hereof.

                                       66
<PAGE>
 
                                   SIGNATURES
                                   ----------



DATED AS OF APRIL 7, 1997     STERLING CHEMICALS, INC.



                              BY:   /s/ JIM P. WISE
                                    _________________________________
                                    NAME:  Jim P. Wise
                                    TITLE: Vice President and
                                            Chief Financial Officer
 

ATTEST:


  /s/ F. MAXWELL EVANS
____________________________ 
NAME:  F. Maxwell Evans
TITLE: Secretary



DATED AS OF APRIL 7, 1997     FLEET NATIONAL BANK,
                                 AS TRUSTEE



                              BY:   /s/ MICHAEL M. HOPKINS
                                    _________________________________
                                    NAME:  Michael M. Hopkins
                                    TITLE: Vice President

ATTEST:


  /s/ ELIZABETH C. HAMMER
____________________________ 
NAME:  Elizabeth C. Hammer
TITLE: Vice President

                                       67
<PAGE>
 
                                                                       EXHIBIT A
                                                                       ---------

                         [FORM OF FACE OF INITIAL NOTE]
                          ---------------------------- 

                            STERLING CHEMICALS, INC.

                             [Global Notes Legend]


          UNLESS THIS CERTIFICATE IS PRESENTED BY AN AUTHORIZED REPRESENTATIVE
OF THE DEPOSITORY TRUST COMPANY, A NEW YORK CORPORATION ("DTC"), NEW YORK, NEW
YORK, TO THE COMPANY OR ITS AGENT FOR REGISTRATION OF TRANSFER, EXCHANGE OR
PAYMENT, AND ANY CERTIFICATE ISSUED IS REGISTERED IN THE NAME OF CEDE & CO. OR
SUCH OTHER NAME AS IS REQUESTED BY AN AUTHORIZED REPRESENTATIVE OF DTC (AND ANY
PAYMENT IS MADE TO CEDE & CO., OR TO SUCH OTHER ENTITY AS IS REQUESTED BY AN
AUTHORIZED REPRESENTATIVE OF DTC), ANY TRANSFER, PLEDGE OR OTHER USE HEREOF FOR
VALUE OR OTHERWISE BY OR TO ANY PERSON IS WRONGFUL INASMUCH AS THE REGISTERED
OWNER HEREOF, CEDE & CO., HAS AN INTEREST HEREIN.

          TRANSFERS OF THIS GLOBAL NOTE SHALL BE LIMITED TO TRANSFERS IN WHOLE,
BUT NOT IN PART, TO NOMINEES OF DTC OR TO A SUCCESSOR THEREOF OR SUCH
SUCCESSOR'S NOMINEE AND TRANSFERS OF PORTIONS OF THIS GLOBAL NOTE SHALL BE
LIMITED TO TRANSFERS MADE IN ACCORDANCE WITH THE RESTRICTIONS SET FORTH IN THE
INDENTURE REFERRED TO ON THE REVERSE HEREOF.*


                           [Restricted Notes Legend]

           "THIS NOTE (OR ITS PREDECESSOR) WAS ORIGINALLY ISSUED IN A
    TRANSACTION EXEMPT FROM REGISTRATION UNDER THE UNITED STATES SECURITIES ACT
    OF 1933, AS AMENDED (THE "SECURITIES ACT"), AND UNDER APPLICABLE STATE
    SECURITIES LAWS, AND THIS NOTE MAY NOT BE OFFERED, SOLD OR OTHERWISE
    TRANSFERRED IN THE ABSENCE OF SUCH REGISTRATION OR AN APPLICABLE EXEMPTION
    THEREFROM.  EACH PURCHASER OF THIS NOTE IS HEREBY NOTIFIED THAT THE SELLER
    OF THIS NOTE MAY BE RELYING ON THE EXEMPTION FROM THE PROVISIONS OF SECTION
    5 OF THE SECURITIES ACT PROVIDED BY RULE 144A THEREUNDER.

           THE HOLDER OF THIS NOTE AGREES FOR THE BENEFIT OF THE COMPANY THAT
    (A) THIS NOTE MAY BE OFFERED, RESOLD, PLEDGED OR OTHERWISE TRANSFERRED, ONLY
    (i) TO A PERSON WHOM THE SELLER REASONABLY BELIEVES IS A QUALIFIED
    INSTITUTIONAL BUYER (AS DEFINED IN RULE 144A UNDER THE SECURITIES ACT) IN A
    TRANSACTION MEETING THE REQUIREMENTS OF RULE 144A, (ii) IN AN OFFSHORE
    TRANSACTION IN ACCORDANCE WITH RULE 904 UNDER THE SECURITIES


- ------------------------
  *  This legend should only be added if the Security is issued in global form.

                                      A-1
<PAGE>
 
    ACT, (iii) PURSUANT TO AN EXEMPTION FROM REGISTRATION UNDER THE SECURITIES
    ACT PROVIDED BY RULE 144 THEREUNDER (IF AVAILABLE) OR (iv) PURSUANT TO AN
    EFFECTIVE REGISTRATION STATEMENT UNDER THE SECURITIES ACT, IN EACH OF CASES
    (i) THROUGH (iv) IN ACCORDANCE WITH ANY APPLICABLE SECURITIES LAWS OF ANY
    STATE OF THE UNITED STATES, AND (B) THE HOLDER WILL, AND EACH SUBSEQUENT
    HOLDER IS REQUIRED TO, NOTIFY ANY PURCHASER OF THIS NOTE FROM IT OF THE
    RESALE RESTRICTIONS REFERRED TO IN (A) ABOVE."

    ["IN CONNECTION WITH ANY TRANSFER, THE HOLDER WILL DELIVER TO THE REGISTRAR
    AND TRANSFER AGENT SUCH CERTIFICATES AND OTHER INFORMATION AS SUCH TRANSFER
    AGENT MAY REASONABLY REQUIRE TO CONFIRM THAT THE TRANSFER COMPLIES WITH THE
    FOREGOING RESTRICTIONS.]**





- ------------------------
 **  Include on a Definitive Security to be held by an institutional "accredited
    investor" (as defined in Rule 501(a), (1), (2), (3) or (7) under the
    Securities Act).

                                      A-2
<PAGE>
 
No. __________                                      Principal Amount $
                                                             CUSIP No. _________

                   11 1/4% Senior Subordinated Notes Due 2007


          STERLING CHEMICALS, INC., a Delaware corporation, promises to pay to
___________________________________, or registered assigns, the principal sum of
_________ Dollars on April 1, 2007.

           Interest Payment Dates:    April 1 and October 1.

           Record Dates:    March 15 and September 15.

           Additional provisions of this Note are set forth on the reverse side
of this Note.

Dated:  ________________


                                   STERLING CHEMICALS, INC.


                                   By _______________________________
                                      Title:


                                   By _______________________________
                                      Title:
TRUSTEE'S CERTIFICATE OF
    AUTHENTICATION

FLEET NATIONAL BANK,
  as Trustee, certifies
  that this is one of the
  Notes referred to in the
  Indenture.

By ____________________________
       Authorized Signatory

                                      A-3
<PAGE>
 
                         [FORM OF REVERSE SIDE OF NOTE]
                          ---------------------------- 

                   11 1/4% Senior Subordinated Notes Due 2007


1.   Interest
     --------

          STERLING CHEMICALS, INC., a Delaware corporation (such corporation,
and its successors and assigns under the Indenture hereinafter referred to,
being herein called "Sterling"), promises to pay interest on the principal
amount of this Note at the rate per annum shown above provided, however, that if
a Registration Default (as defined in the Registration Rights Agreement) occurs,
interest will accrue on this security at a rate of 11 3/4% per annum from and
including the date on which any such Registration Default shall occur but
excluding the date on which all Registration Defaults have been cured.

          Sterling will pay interest semi-annually on April 1 and October 1 of
each year, commencing October 1, 1997.  Interest on the Notes will accrue from
the most recent date to which interest has been paid, or, if no interest has
been paid, from April 7, 1997.  Interest will be computed on the basis of a 360-
day year of twelve 30-day months.  Sterling shall pay interest on overdue
principal at the rate borne by the Notes.

2.   Method of Payment
     -----------------

          Sterling will pay interest on the Notes (except defaulted interest) to
the Persons who are registered Holders of Notes at the close of business on the
March 15 or September 15 next preceding the interest payment date even if Notes
are canceled after the record date and on or before the interest payment date.
Holders must surrender Notes to a Paying Agent to collect principal payments.
Sterling will pay principal and interest in money of the United States that at
the time of payment is legal tender for payment of public and private debts.
However, Sterling may pay principal and interest by check payable in such money.
It may mail an interest check to a Holder's registered address.

3.   Paying Agent and Registrar
     --------------------------

          Initially, Fleet National Bank, a national banking association (the
"Trustee"), will act as Paying Agent and Registrar.  Sterling may appoint and
change any Paying Agent, Registrar or co-registrar without notice.  Sterling or
any of its domestically incorporated Wholly Owned Subsidiaries may act as Paying
Agent, Registrar or co-registrar.

4.   Indenture
     ---------

          Sterling issued the Notes under an Indenture dated as of April 7, 1997
(the "Indenture"), between Sterling and the Trustee.  The terms of the Notes
include those stated in the Indenture and those made part of the Indenture by
reference to the Trust Indenture Act of 1939 (15 U.S.C. Sections 77aaa-77bbbb)
as in effect on the date of the Indenture (the "TIA"). Terms defined in the
Indenture and not defined herein have the meanings ascribed thereto in the
Indenture. The Notes are subject to all such terms, and Holders of Notes are
referred to the Indenture and the TIA for a statement of those terms.

                                      A-4
<PAGE>
 
          The Notes are unsecured senior subordinated obligations of Sterling
limited to $150,000,000 aggregate principal amount (subject to Section 2.07 of
the Indenture).  The Indenture imposes certain limitations on the incurrence of
additional indebtedness by Sterling and certain of its subsidiaries, the payment
of dividends on, and the redemption of, capital stock of Sterling and certain of
its Subsidiaries, the making of Investments, restrictions on distributions from
certain Subsidiaries, the use of proceeds from the sale of assets and Subsidiary
stock and transactions with affiliates.  The Indenture also restricts the
ability of Sterling to consolidate or merge with or into, or to transfer all or
substantially all its assets to, another person.

5.   Optional Redemption
     -------------------

          The Notes will be redeemable, at Sterling's option, in whole or in
part, at any time and from time to time on or after April 1, 2002, upon not less
than 30 nor more than 60 days' prior notice mailed by first-class mail to each
Holder's registered address, at the following redemption prices (expressed in
percentages of principal amount at maturity), plus accrued interest to the
redemption date (subject to the right of Holders of record on the relevant
record date to receive interest due on the relevant interest payment date), if
redeemed during the 12-month period commencing on or after April 1 of the years
set forth below:

                                       Redemption
                   Year                   Price
                   ----                ----------

          2002 . . . . . . . .         105.625%
          2003 . . . . . . . .         103.750%
          2004 . . . . . . . .         101.875%
          2005 . . . . . . . .         100.000%

          In addition, at any time and from time to time prior to April 1, 2000,
Sterling may redeem in the aggregate up to 35% of the original principal amount
of the Notes with the proceeds of one or more Public Equity Offerings following
which there is a Public Market, at a redemption price (expressed as a percentage
of principal amount) of 111.25%, plus accrued and unpaid interest, if any, to
the redemption date (subject to the right of Holders of record on the relevant
record date to receive interest due on the relevant interest payment date);
provided, however, that at least $97,500,000 aggregate principal amount of the
Notes must remain outstanding after each such redemption.

6.   Notice of Redemption
     --------------------

          Notice of redemption shall be mailed at least 30 days but not more
than 60 days before the redemption date to each Holder of Notes to be redeemed
at its registered address.  Notes in denominations larger than $1,000 may be
redeemed in part but only in whole multiples of $1,000.  If money sufficient to
pay the redemption price of and accrued interest on all Notes (or portions
thereof) to be redeemed on the redemption date is deposited with the Paying
Agent on or before the redemption date and certain other conditions are
satisfied, on and after such date interest ceases to accrue on such Notes (or
such portions thereof) called for redemption.


                                      A-5
<PAGE>
 
7.   Put Provisions
     --------------

          Upon a Change of Control, any Holder of Notes will have the right to
cause Sterling to repurchase all or any part of the Notes of such Holder at a
purchase price equal to 101% of the principal amount of the Notes to be
repurchased plus accrued interest to the date of repurchase (subject to the
right of Holders of record on the relevant record date to receive interest due
on the interest payment date) as provided in, and subject to the terms of, the
Indenture.

8.   Subordination
     -------------

          The Notes are subordinated to Senior Debt.  To the extent provided in
the Indenture, Senior Debt must be paid before the Notes may be paid.  Sterling
agrees, and each Holder of a Note by accepting a Note agrees, to the
subordination provisions contained in the Indenture and authorizes the Trustee
to give effect to such subordination provisions and appoints the Trustee as
attorney-in-fact for such purpose.

9.   Denominations; Transfer; Exchange
     ---------------------------------

          The Notes are in registered form without coupons in denominations of
$1,000 (or, in the case of Securities sold to institutional "accredited
investors" as described in Rule 501(a) (1), (2), (3) or (7) under the Securities
Act in a transaction intended to be exempt from registration under the
Securities Act, minimum denominations of $500,000) and integral multiples of
$1,000.  Holders of Notes may transfer or exchange Notes in accordance with the
Indenture.  The Registrar may require a Holder of a Note, among other things, to
furnish appropriate endorsements or transfer documents and to pay any taxes and
fees required by law or permitted by the Indenture.  The Registrar need not
register the transfer of or exchange any Note selected for redemption (except,
in the case of a Note to be redeemed in part, the portion of the Note not to be
redeemed) or any Notes for a period of 15 days before a selection of Notes to be
redeemed or 15 days before an interest payment date.

10.  Persons Deemed Owners
     ---------------------

          The registered Holder of this Note may be treated as the sole owner of
such Note for all purposes.

11.  Unclaimed Money
     ---------------

          Subject to applicable abandoned property law, if money for the payment
of principal or interest remains unclaimed for two years, the Trustee or Paying
Agent shall pay the money back to Sterling at its request unless an abandoned
property law designates another Person.  After any such payment, Holders
entitled to the money must look only to Sterling and not to the Trustee or
Paying Agent for payment.

12.  Discharge and Defeasance
     ------------------------

          Subject to certain conditions, Sterling at any time may terminate some
or all of its obligations under the Notes and the Indenture if Sterling deposits
with the

                                      A-6
<PAGE>
 
Trustee money or U.S. Government Obligations for the payment of principal and
interest on the Notes to redemption or maturity, as the case may be.

13.  Amendment; Waiver
     -----------------

          Subject to certain exceptions set forth in the Indenture, (i) the
Indenture or the Notes may be amended with the written consent of the Holders of
at least a majority in principal amount outstanding of the Notes; and (ii) any
default or compliance with any provision may be waived with the written consent
of the Holders of a majority in principal amount of the Notes then outstanding.
Subject to certain exceptions set forth in the Indenture, without the consent of
any Holder of a Note, Sterling and the Trustee may amend the Indenture or the
Notes to cure any ambiguity, omission, defect or inconsistency, or to comply
with Article VI of the Indenture, or to provide for uncertificated Notes, in
addition to or in place of certificated Notes, or to add guarantees with respect
to the Notes or add additional covenants or surrender rights and powers
conferred on Sterling, or to make any change that would provide additional
rights or benefits to the Holders of Notes or that does not adversely affect the
rights of any Holder of a Note or to comply with requirements of the SEC in
connection with the qualification of the Indenture under the TIA.

14.  Defaults and Remedies
     ---------------------

          Under the Indenture, Events of Default include (i) default for 30 days
in payment of interest; (ii) default in payment of principal on the Notes at
maturity, upon redemption, upon declaration, upon required repurchase or
otherwise; (iii) failure by Sterling to comply with other covenants in the
Indenture or the Notes, in certain cases subject to notice and lapse of time;
(iv) certain accelerations (including failure to pay within any grace period
after final maturity) of other Debt of Sterling or any of its Subsidiaries if
the amount accelerated (or so unpaid) aggregates $10 million or more; (v)
certain events of bankruptcy or insolvency with respect to Sterling and its
Significant Subsidiaries; and (vi) certain judgments or decrees for the payment
of money in excess of $10 million.  If an Event of Default occurs and is
continuing, the Trustee or the Holders of at least 25% in principal amount of
the Notes may declare all the Notes to be due and payable immediately.  Certain
events of bankruptcy or insolvency are Events of Default which will result in
the Notes being due and payable immediately upon the occurrence of such Events
of Default.

          Holders of Notes may not enforce the Indenture or the Notes except as
provided in the Indenture.  The Trustee may refuse to enforce the Indenture or
the Notes unless it receives reasonable indemnity or security.  Subject to
certain limitations, Holders of a majority in principal amount of the Notes may
direct the Trustee in its exercise of any trust or power.  The Trustee may
withhold from Holders of Notes notice of any continuing Default (except a
Default in payment of principal or interest) if it determines that withholding
such notice is in the interest of the Holders of Notes.

15.  Trustee Dealings with Sterling
     ------------------------------

          Subject to certain limitations imposed by the TIA, the Trustee under
the Indenture, in its individual or any other capacity, may become the owner or
pledgee of Notes and may otherwise deal with and collect obligations owed to it
by Sterling or its

                                      A-7
<PAGE>
 
Affiliates and may otherwise deal with Sterling or its Affiliates with the same
rights it would have if it were not Trustee.

16.  No Recourse Against Others
     --------------------------

          A director, officer, employee or stockholder, as such, of Sterling or
the Trustee shall not have any liability for any obligations of Sterling under
the Notes or the Indenture or for any claim based on, in respect of or by reason
of such obligations.  By accepting a Note, each Holder of a Note waives and
releases all such liability.  The waiver and release are part of the
consideration for the issue of the Notes.

17.  Authentication
     --------------

          This Note shall not be valid until an authorized signatory of the
Trustee (or an authenticating agent) manually signs the certificate of
authentication on the face of this Note.

18.  Abbreviations
     -------------

          Customary abbreviations may be used in the name of a Holder of a Note
or an assignee, such as TEN COM (=tenants in common), TEN ENT (=tenants by the
entireties), JT TEN (=joint tenants with rights of survivorship and not as
tenants in common), CUST (=custodian), and U/G/M/A (=Uniform Gift to Minors
Act).

19.  CUSIP Numbers
     -------------

          Pursuant to the recommendation promulgated by the Committee on Uniform
Security Identification Procedures Sterling has caused CUSIP numbers to be
printed on the Notes and has directed the Trustee to use such CUSIP numbers in
notices of redemption as a convenience to Holders of Notes.  No representation
is made as to the accuracy of such numbers either as printed on the Notes or as
contained in any notice of redemption and reliance may be placed only on the
other identification numbers placed thereon.

                           __________________________


          Sterling will furnish to any Holder of a Note upon written request and
without charge to such Holder of a Note a copy of the Indenture which contains
the text of this Note in larger type.   Requests may be made to:

                            Sterling Chemicals, Inc.
                                   1200 Smith
                                   Suite 1900
                               Houston, TX 77002

                            Attention:  Jim P. Wise

                                      A-8
<PAGE>
 
================================================================================

                                  ASSIGNMENT FORM
 
        To assign this Note, complete the form below:
 
        I or we assign and transfer this Note to:


             [Print or type assignee's name, address and zip code]
 
             [Insert assignee's soc. sec. or tax I.D. No. ]
 

        and irremovably appoint ___________________ agent to transfer this Note
        on the books of Sterling. The agent may substitute another to act for
        him.

================================================================================

  Date: ______________  Your Signature:_________________________________________

================================================================================

  Sign exactly as your name appears on the face of this Note.


                                      A-9
<PAGE>
 
    CERTIFICATE TO BE DELIVERED UPON EXCHANGE OR REGISTRATION OF TRANSFER OF
                                RESTRICTED NOTES

This certificate relates to $_________ principal amount of Notes held in (check
applicable space) ____ book-entry or _____ definitive form by the undersigned.

The undersigned (check one box below):

[ ]  has requested the Trustee by written order to deliver in exchange for its
     beneficial interest in the Global Note held by the Depository a Note or
     Notes in definitive, registered form of authorized denominations and an
     aggregate principal amount equal to its beneficial interest in such Global
     Note (or the portion thereof indicated above); or

[ ]  has requested the Trustee by written order to exchange or register the
     transfer of a Note or Notes.

The undersigned confirms that such Notes are being:

 
CHECK ONE BOX BELOW:
 
          (1)  [_]  acquired for the undersigned's own account, without Transfer
                    (in satisfaction of Section 2.06(a)(ii)(A) of the
                    Indenture); or
                     
          (2)  [_]  transferred pursuant to and in compliance with Rule 144A
                    under the Securities Act of 1933, as amended; or
 
          (3)  [_]  transferred pursuant to and in compliance with Regulation
                    S under the Securities Act of 1933, as amended; or
 
          (4)  [_]  transferred pursuant to and in compliance with Rule 144
                    under the Securities Act of 1933, as amended; or
 
          (5)  [_]  transferred pursuant to an effective registration statement
                    under the Securities Act of 1933, as amended.
 




Unless one of the boxes is checked, the Trustee will refuse to register any of
the Notes evidenced by this certificate in the name of any person other than the
registered holder thereof; provided, however, that if box (2), (3) or (4) is
checked, Sterling or the Trustee may require evidence reasonably satisfactory to
them as to the compliance with the restrictions set forth in the legend on the
face of this Note.


                                        _____________________________
                                                  Signature

                                     A-10
<PAGE>
 
Signature Guarantee:            _______________________________________
                                (Signature must be guaranteed by member
                                firm of the New York Stock Exchange or a
                                commercial bank or trust company)


                                     A-11
<PAGE>
 
                   OPTION OF HOLDER OF NOTE TO ELECT PURCHASE

          If you elect to have this Note purchased by Sterling pursuant to
Article IV or Section 5.07 of the Indenture, check the box:

                                      [_]

          If you elect to have only part of this Note purchased by Sterling
pursuant to Article IV or Section 5.07 of the Indenture, state the amount:

                                         $___________________________



Date:_________________ Your Signature: ______________________________
                                       (Sign exactly as your name
                                       appears on the face of the
                                       Note)



Signature Guarantee: _________________________________________________________
                     (Signature must be guaranteed by a member firm of the New
                     York Stock Exchange or a commercial bank or trust company)


                                     A-12
<PAGE>
 
                        [TO BE ATTACHED TO GLOBAL NOTES]

               SCHEDULE OF INCREASES OR DECREASES IN GLOBAL NOTE

     The following increases or decreases in this Global Note have been made:

<TABLE>
<CAPTION>
===================================================================================================================
DATE OF    AMOUNT OF DECREASE IN  AMOUNT OF INCREASE IN   PRINCIPAL AMOUNT OF THIS    SIGNATURE OF AUTHORIZED
 EXCHANGE  PRINCIPAL AMOUNT OF    PRINCIPAL AMOUNT OF     GLOBAL NOTE FOLLOWING       SIGNATORY OF TRUSTEE OR NOTES
           THIS GLOBAL NOTE       THIS GLOBAL NOTE        SUCH DECREASE OR INCREASE   CUSTODIAN
- -------------------------------------------------------------------------------------------------------------------
<S>        <C>                    <C>                    <C>                          <C> 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
  
===================================================================================================================
</TABLE>


                                     A-13
<PAGE>
 
                                                                       EXHIBIT B
                                                                       ---------
                       [FORM OF FACE OF EXCHANGE NOTE AND
                             PRIVATE EXCHANGE NOTE]
*
**
                            STERLING CHEMICALS, INC.           $
No.                                                            CUSIP:

                   11 1/4% Senior Subordinated Note Due 2007


          Sterling Chemicals, Inc., a Delaware corporation, promises to pay to
or registered assigns, the principal sum of

Dollars on April 1, 2007.

          Interest Payment Dates:    April 1 and October 1.

          Record Dates:  March 15 and September 15.

          Additional provisions of this Note are set forth on the other side of
this Note.


                              STERLING CHEMICALS, INC.

                                by


Dated:  _________________

[Seal]
                                ____________________________
                                Title:


                                ____________________________
                                Title

________________________     

     *  If the Note is to be issued in global form add the Global Notes Legend
from Exhibit A and the attachment to Exhibit A captioned "[TO BE ATTACHED TO
GLOBAL NOTES] - SCHEDULE OF INCREASES OR DECREASES IN GLOBAL NOTE".

     **  If the Note is a Private Exchange Note issued in a Private Exchange to
the Initial Purchasers holding an unsold portion of its initial allotment, add
the restricted securities legend from Exhibit A and include the "Certificate to
be Delivered upon Exchange or Registration of Transfer of Restricted Notes" from
Exhibit A.


                                      B-1
<PAGE>
 
TRUSTEE'S CERTIFICATE OF
     AUTHENTICATION

FLEET NATIONAL BANK,

 as Trustee, certifies
 that this is one of the
 Notes referred to
 in the Indenture.

 by
     ____________________
     Authorized Signatory






                                      B-2
<PAGE>
 
                         [FORM OF REVERSE SIDE OF NOTE]
                          ---------------------------- 

                   11 1/4% Senior Subordinated Notes Due 2007


1.   Interest
     --------

          STERLING CHEMICALS, INC., a Delaware corporation (such corporation,
and its successors and assigns under the Indenture hereinafter referred to,
being herein called "Sterling"), promises to pay interest on the principal
amount of this Note at the rate per annum shown above provided, however, that if
a Registration Default (as defined in the Registration Rights Agreement) occurs,
interest will accrue on this security at a rate of 11 3/4% per annum from and
including the date on which any such Registration Default shall occur but
excluding the date on which all Registration Defaults have been cured.

          Sterling will pay interest semi-annually on April 1 and October 1 of
each year, commencing October 1, 1997.  Interest on the Notes will accrue from
the most recent date to which interest has been paid, or, if no interest has
been paid, from April 7, 1997.  Interest will be computed on the basis of a 360-
day year of twelve 30-day months.  Sterling shall pay interest on overdue
principal at the rate borne by the Notes.

2.   Method of Payment
     -----------------

          Sterling will pay interest on the Notes (except defaulted interest) to
the Persons who are registered Holders of Notes at the close of business on the
March 15 or September 15 next preceding the interest payment date even if Notes
are canceled after the record date and on or before the interest payment date.
Holders must surrender Notes to a Paying Agent to collect principal payments.
Sterling will pay principal and interest in money of the United States that at
the time of payment is legal tender for payment of public and private debts.
However, Sterling may pay principal and interest by check payable in such money.
It may mail an interest check to a Holder's registered address.

3.   Paying Agent and Registrar
     --------------------------

          Initially, Fleet National Bank, a national banking association (the
"Trustee"), will act as Paying Agent and Registrar.  Sterling may appoint and
change any Paying Agent, Registrar or co-registrar without notice.  Sterling or
any of its domestically incorporated Wholly Owned Subsidiaries may act as Paying
Agent, Registrar or co-registrar.

4.   Indenture
     ---------

          Sterling issued the Notes under an Indenture dated as of April 7, 1997
(the "Indenture"), between Sterling and the Trustee.  The terms of the Notes
include those stated in the Indenture and those made part of the Indenture by
reference to the Trust Indenture Act of 1939 (15 U.S.C. (S)(S) 77aaa-77bbbb) as
in effect on the date of




                                      B-3
<PAGE>
 
the Indenture (the "TIA").  Terms defined in the Indenture and not defined
herein have the meanings ascribed thereto in the Indenture.  The Notes are
subject to all such terms, and Holders of Notes are referred to the Indenture
and the TIA for a statement of those terms.

          The Notes are unsecured senior subordinated obligations of Sterling
limited to $150,000,000 aggregate principal amount (subject to Section 2.07 of
the Indenture).  The Indenture imposes certain limitations on the incurrence of
additional indebtedness by Sterling and certain of its subsidiaries, the payment
of dividends on, and the redemption of, capital stock of Sterling and certain of
its Subsidiaries, the making of Investments, restrictions on distributions from
certain Subsidiaries, the use of proceeds from the sale of assets and Subsidiary
stock and transactions with affiliates.  The Indenture also restricts the
ability of Sterling to consolidate or merge with or into, or to transfer all or
substantially all its assets to, another person.

5.   Optional Redemption
     -------------------

          The Notes will be redeemable, at Sterling's option, in whole or in
part, at any time and from time to time on or after April 1, 2002, upon not less
than 30 nor more than 60 days' prior notice mailed by first-class mail to each
Holder's registered address, at the following redemption prices (expressed in
percentages of principal amount at maturity), plus accrued interest to the
redemption date (subject to the right of Holders of record on the relevant
record date to receive interest due on the relevant interest payment date), if
redeemed during the 12-month period commencing on or after April 1 of the years
set forth below:

                                       Redemption
                   Year                   Price
                   ----                ----------

          2002 . . . . . . . .         105.625%
          2003 . . . . . . . .         103.750%
          2004 . . . . . . . .         101.875%
          2005 . . . . . . . .         100.000%

          In addition, at any time and from time to time prior to April 1, 2000,
Sterling may redeem in the aggregate up to 35% of the original principal amount
of the Notes with the proceeds of one or more Public Equity Offerings following
which there is a Public Market, at a redemption price (expressed as a percentage
of principal amount) of 111.25%, plus accrued and unpaid interest, if any, to
the redemption date (subject to the right of Holders of record on the relevant
record date to receive interest due on the relevant interest payment date);
provided, however, that at least $97,500,000 aggregate principal amount of the
Notes must remain outstanding after each such redemption.

6.   Notice of Redemption
     --------------------

          Notice of redemption shall be mailed at least 30 days but not more
than 60 days before the redemption date to each Holder of Notes to be redeemed
at its registered address.  Notes in denominations larger than $1,000 may be
redeemed in part but only in whole multiples of $1,000.  If money sufficient to
pay the redemption


                                      B-4
<PAGE>
 
price of and accrued interest on all Notes (or portions thereof) to be redeemed
on the redemption date is deposited with the Paying Agent on or before the
redemption date and certain other conditions are satisfied, on and after such
date interest ceases to accrue on such Notes (or such portions thereof) called
for redemption.

7.   Put Provisions
     --------------

          Upon a Change of Control, any Holder of Notes will have the right to
cause Sterling to repurchase all or any part of the Notes of such Holder at a
purchase price equal to 101% of the principal amount of the Notes to be
repurchased plus accrued interest to the date of repurchase (subject to the
right of Holders of record on the relevant record date to receive interest due
on the interest payment date) as provided in, and subject to the terms of, the
Indenture.

8.   Subordination
     -------------

          The Notes are subordinated to Senior Debt.  To the extent provided in
the Indenture, Senior Debt must be paid before the Notes may be paid.  Sterling
agrees, and each Holder of a Note by accepting a Note agrees, to the
subordination provisions contained in the Indenture and authorizes the Trustee
to give effect to such subordination provisions and appoints the Trustee as
attorney-in-fact for such purpose.

9.   Denominations; Transfer; Exchange
     ---------------------------------

          The Notes are in registered form without coupons in denominations of
$1,000 (or, in the case of Securities sold to institutional "accredited
investors" as described in Rule 501(a) (1), (2), (3) or (7) under the Securities
Act in a transaction intended to be exempt from registration under the
Securities Act, minimum denominations of $500,000) and integral multiples of
$1,000.  Holders of Notes may transfer or exchange Notes in accordance with the
Indenture.  The Registrar may require a Holder of a Note, among other things, to
furnish appropriate endorsements or transfer documents and to pay any taxes and
fees required by law or permitted by the Indenture.  The Registrar need not
register the transfer of or exchange any Note selected for redemption (except,
in the case of a Note to be redeemed in part, the portion of the Note not to be
redeemed) or any Notes for a period of 15 days before a selection of Notes to be
redeemed or 15 days before an interest payment date.

10.  Persons Deemed Owners
     ---------------------

          The registered Holder of this Note may be treated as the sole owner of
such Note for all purposes.

11.  Unclaimed Money
     ---------------

          Subject to applicable abandoned property law, if money for the payment
of principal or interest remains unclaimed for two years, the Trustee or Paying
Agent shall pay the money back to Sterling at its request unless an abandoned
property law designates another Person.  After any such payment, Holders
entitled to the money must look only to Sterling and not to the Trustee or
Paying Agent for payment.


                                      B-5
<PAGE>
 
12.  Discharge and Defeasance
     ------------------------

          Subject to certain conditions, Sterling at any time may terminate some
or all of its obligations under the Notes and the Indenture if Sterling deposits
with the Trustee money or U.S. Government Obligations for the payment of
principal and interest on the Notes to redemption or maturity, as the case may
be.

13.  Amendment; Waiver
     -----------------

          Subject to certain exceptions set forth in the Indenture, (i) the
Indenture or the Notes may be amended with the written consent of the Holders of
at least a majority in principal amount outstanding of the Notes; and (ii) any
default or compliance with any provision may be waived with the written consent
of the Holders of a majority in principal amount of the Notes then outstanding.
Subject to certain exceptions set forth in the Indenture, without the consent of
any Holder of a Note, Sterling and the Trustee may amend the Indenture or the
Notes to cure any ambiguity, omission, defect or inconsistency, or to comply
with Article VI of the Indenture, or to provide for uncertificated Notes, in
addition to or in place of certificated Notes, or to add guarantees with respect
to the Notes or add additional covenants or surrender rights and powers
conferred on Sterling, or to make any change that would provide additional
rights or benefits to the Holders of Notes or that does not adversely affect the
rights of any Holder of a Note or to comply with requirements of the SEC in
connection with the qualification of the Indenture under the TIA.

14.  Defaults and Remedies
     ---------------------

          Under the Indenture, Events of Default include (i) default for 30 days
in payment of interest; (ii) default in payment of principal on the Notes at
maturity, upon redemption, upon declaration, upon required repurchase or
otherwise; (iii) failure by Sterling to comply with other covenants in the
Indenture or the Notes, in certain cases subject to notice and lapse of time;
(iv) certain accelerations (including failure to pay within any grace period
after final maturity) of other Debt of Sterling or any of its Subsidiaries if
the amount accelerated (or so unpaid) aggregates $10 million or more; (v)
certain events of bankruptcy or insolvency with respect to Sterling and its
Significant Subsidiaries; and (vi) certain judgments or decrees for the payment
of money in excess of $10 million.  If an Event of Default occurs and is
continuing, the Trustee or the Holders of at least 25% in principal amount of
the Notes may declare all the Notes to be due and payable immediately.  Certain
events of bankruptcy or insolvency are Events of Default which will result in
the Notes being due and payable immediately upon the occurrence of such Events
of Default.

          Holders of Notes may not enforce the Indenture or the Notes except as
provided in the Indenture.  The Trustee may refuse to enforce the Indenture or
the Notes unless it receives reasonable indemnity or security.  Subject to
certain limitations, Holders of a majority in principal amount of the Notes may
direct the Trustee in its exercise of any trust or power.  The Trustee may
withhold from Holders of Notes notice of any continuing Default (except a
Default in payment of principal or interest) if it determines that withholding
such notice is in the interest of the Holders of Notes.


                                      B-6
<PAGE>
 
15.  Trustee Dealings with Sterling
     ------------------------------

          Subject to certain limitations imposed by the TIA, the Trustee under
the Indenture, in its individual or any other capacity, may become the owner or
pledgee of Notes and may otherwise deal with and collect obligations owed to it
by Sterling or its Affiliates and may otherwise deal with Sterling or its
Affiliates with the same rights it would have if it were not Trustee.

16.  No Recourse Against Others
     --------------------------

          A director, officer, employee or stockholder, as such, of Sterling or
the Trustee shall not have any liability for any obligations of Sterling under
the Notes or the Indenture or for any claim based on, in respect of or by reason
of such obligations.  By accepting a Note, each Holder of a Note waives and
releases all such liability.  The waiver and release are part of the
consideration for the issue of the Notes.

17.  Authentication
     --------------

          This Note shall not be valid until an authorized signatory of the
Trustee (or an authenticating agent) manually signs the certificate of
authentication on the face of this Note.

18.  Abbreviations
     -------------

          Customary abbreviations may be used in the name of a Holder of a Note
or an assignee, such as TEN COM (=tenants in common), TEN ENT (=tenants by the
entireties), JT TEN (=joint tenants with rights of survivorship and not as
tenants in common), CUST (=custodian), and U/G/M/A (=Uniform Gift to Minors
Act).

19.  CUSIP Numbers
     -------------

          Pursuant to the recommendation promulgated by the Committee on Uniform
Security Identification Procedures Sterling has caused CUSIP numbers to be
printed on the Notes and has directed the Trustee to use such CUSIP numbers in
notices of redemption as a convenience to Holders of Notes.  No representation
is made as to the accuracy of such numbers either as printed on the Notes or as
contained in any notice of redemption and reliance may be placed only on the
other identification numbers placed thereon.

                           __________________________

          Sterling will furnish to any Holder of a Note upon written request and
without charge to such Holder of a Note a copy of the Indenture which contains
the text of this Note in larger type.   Requests may be made to:

                            Sterling Chemicals, Inc.
                                   1200 Smith
                                   Suite 1900
                               Houston, TX 77002
                            Attention:  Jim P. Wise


                                      B-7
<PAGE>
 
================================================================================
 
                                  ASSIGNMENT FORM
 
        To assign this Note, complete the form below:
 
        I or we assign and transfer this Note to:

             [Print or type assignee's name, address and zip code]
 
             [Insert assignee's soc. sec. or tax I.D. No.]
 

        and irremovably appoint ___________________ agent to transfer this Note
        on the books of Sterling. The agent may substitute another to act for
        him.

================================================================================

  Date: ____________________  Your Signature: _____________________________

================================================================================

  Sign exactly as your name appears on the face of this Note.



                                      B-8
<PAGE>
 
                   OPTION OF HOLDER OF NOTE TO ELECT PURCHASE

          If you elect to have this Note purchased by Sterling pursuant to
Article IV or Section 5.07 of the Indenture, check the box:

                                      [_]

          If you elect to have only part of this Note purchased by Sterling
pursuant to Article IV or Section 5.07 of the Indenture, state the amount:

                                         $___________________________



Date: ________________  Your Signature: _____________________________
                                        (Sign exactly as your name
                                        appears on the face of the
                                        Note)



Signature Guarantee: _________________________________________________________
                     (Signature must be guaranteed by a member firm of the New
                     York Stock Exchange or a commercial bank or trust company)



                                      B-9

<PAGE>
 
                                                                     EXHIBIT 4.2

                            STERLING CHEMICALS, INC.

                   11 1/4% Senior Subordinated Notes Due 2007


                         REGISTRATION RIGHTS AGREEMENT
                         -----------------------------


                                                                   April 1, 1997



Credit Suisse First Boston Corporation
Chase Securities Inc.
c/o Credit Suisse First Boston Corporation
     Eleven Madison Avenue
     New York, New York 10010-3629

Ladies and Gentlemen:

          Sterling Chemicals, Inc., a Delaware corporation (the "Company"),
proposes to issue and sell to Credit Suisse First Boston Corporation and Chase
Securities Inc. (collectively, the "Initial Purchasers"), upon the terms set
forth in a purchase agreement of even date herewith (the "Purchase Agreement"),
$150,000,000 aggregate principal amount of its 11 1/4% Senior Subordinated Notes
Due 2007 (the "Notes").  The Notes will be issued pursuant to an Indenture,
dated as of April 7, 1997 (the "Indenture") between the Company and Fleet
National Bank (the "Trustee").  As an inducement to the Initial Purchasers, the
Company agrees with the Initial Purchasers, for the benefit of the holders of
the Notes (including, without limitation, the Initial Purchasers), the Exchange
Notes (as defined below) and the Private Exchange Notes (as defined below)
(collectively the "Holders"), as follows:

          1.   Registered Exchange Offer.  The Company shall, at its own cost,
prepare and, not later than 45 days after (or if the 45th day is not a business
day, the first business day thereafter) the date of original issue of the Notes
(the "Issue Date"), file with the Securities and Exchange Commission (the
"Commission") a registration statement (the "Exchange Offer Registration
Statement") on an appropriate form under the Securities Act of 1933, as amended
(the "Securities Act"), with respect to a proposed offer (the "Registered
Exchange Offer") to the Holders of Transfer Restricted Notes (as defined in
Section 6 hereof), who are not prohibited by any law or policy of the Commission
from participating in the Registered Exchange Offer, to issue and deliver to
such Holders, in exchange for the Notes, a like aggregate principal amount of
debt securities (the "Exchange Notes") of the Company issued under the Indenture
and identical in all material respects to the Notes (except for the transfer
restrictions relating to the Notes and provisions relating to the matters
described in Section 6 hereof). The Company shall use its best efforts to cause
such Exchange Offer Registration Statement to become effective under the
Securities Act within 150 days (or if the 150th day is not a business day, the
first business day thereafter) after the Issue Date of the Notes and shall keep
the Exchange Offer Registration Statement effective for not less than 30 days
(or longer, if required by applicable law) after the date notice of the
Registered Exchange Offer is mailed to the Holders (such period being called the
"Exchange Offer Registration Period").

          If the Company effects the Registered Exchange Offer, the Company will
be entitled to close the Registered Exchange Offer 30 days after the
commencement thereof provided that the
<PAGE>
 
Company has accepted all the Notes theretofore validly tendered in accordance
with the terms of the Registered Exchange Offer.

          Following the declaration of the effectiveness of the Exchange Offer
Registration Statement, the Company shall promptly commence the Registered
Exchange Offer, it being the objective of such Registered Exchange Offer to
enable each Holder of Transfer Restricted Notes electing to exchange the Notes
for Exchange Notes (assuming that such Holder is not an affiliate of the Company
within the meaning of the Securities Act, acquires the Exchange Notes in the
ordinary course of such Holder's business and has no arrangements with any
person to participate in the distribution of the Exchange Notes and is not
prohibited by any law or policy of the Commission from participating in the
Registered Exchange Offer) to trade such Exchange Notes from and after their
receipt without any limitations or restrictions under the Securities Act or the
Securities Exchange Act of 1934, as amended (the "Exchange Act"), subject as to
an Exchanging Dealer (as defined below) to the provisions of the next paragraph
below) and without material restrictions under the securities laws of the
several states of the United States.

          The Company acknowledges that, pursuant to current interpretations by
the Commission's staff of Section 5 of the Securities Act, in the absence of an
applicable exemption therefrom, (i) each Holder which is a broker-dealer
electing to exchange Notes, acquired for its own account as a result of market
making activities or other trading activities, for Exchange Notes (an
"Exchanging Dealer"), is required to deliver a prospectus containing the
information set forth in Annex A hereto on the cover, in Annex B hereto in the
"Exchange Offer Procedures" section and the "Purpose of the Exchange Offer"
section, and in Annex C hereto in the "Plan of Distribution" section of such
prospectus in connection with a sale of any such Exchange Notes received by such
Exchanging Dealer pursuant to the Registered Exchange Offer and (ii) an Initial
Purchaser that elects to sell Exchange Notes acquired in exchange for Notes
constituting any portion of an unsold allotment is required to deliver a
prospectus containing the information required by Items 507 or 508 of Regulation
S-K under the Securities Act, as applicable, in connection with such sale.

          The Company shall use its best efforts to keep the Exchange Offer
Registration Statement effective and to amend and supplement the prospectus
contained therein, in order to permit such prospectus to be lawfully delivered
by all persons subject to the prospectus delivery requirements of the Securities
Act for such period of time as such persons must comply with such requirements
in order to resell the Exchange Notes; provided, however, that (i) in the case
where such prospectus and any amendment or supplement thereto must be delivered
by an Exchanging Dealer or an Initial Purchaser, such period shall be the lesser
of 180 days and the date on which all Exchanging Dealers and the Initial
Purchasers have sold all Exchange Notes held by them (unless such period is
extended pursuant to Section 3(j) below) and (ii) the Company shall make such
prospectus and any amendment or supplement thereto, available to any broker-
dealer for use in connection with any resale of any Exchange Notes for a period
of not less than 90 days after the consummation of the Registered Exchange
Offer.

          If, upon consummation of the Registered Exchange Offer, any Initial
Purchaser holds Notes acquired by it as part of its initial distribution, the
Company, simultaneously with the delivery of the Exchange Notes pursuant to the
Registered Exchange Offer, shall issue and deliver to such Initial Purchaser
upon the written request of such Initial Purchaser, in exchange (the "Private
Exchange") for the Notes held by such Initial Purchaser, a like principal amount
of debt securities of the Company issued under the Indenture and identical in
all material respects (including the existence of restrictions on transfer under
the Securities Act and the securities laws of the several states of the United
States but excluding provisions relating to the matters described in Section 6
hereof) to the Notes (the "Private Exchange Notes").  The Notes, the Exchange
Notes and the Private Exchange Notes are herein collectively called the
"Securities."

                                       2
<PAGE>
 
          In connection with the Registered Exchange Offer, the Company shall:

          (a) mail to each Holder a copy of the prospectus forming part of the
Exchange Offer Registration Statement, together with an appropriate letter of
transmittal and related documents;

          (b) keep the Registered Exchange offer open for not less than 30 days
(or longer, if required by applicable law) after the date notice thereof is
mailed to the Holders;

          (c) utilize the services of a depositary for the Registered Exchange
Offer with an address in the Borough of Manhattan, The City of New York, which
may be the Trustee or an affiliate of the Trustee;

          (d) permit Holders to withdraw tendered Notes at any time prior to the
close of business, New York time, on the last business day on which the
Registered Exchange Offer shall remain open; and

          (e) otherwise comply with all applicable laws.

          As soon as practicable after the close of the Registered Exchange
Offer or the Private Exchange, as the case may be, the Company shall:

               (i) accept for exchange all the Notes validly tendered and not
     withdrawn pursuant to the Registered Exchange Offer and the Private
     Exchange;

               (ii) deliver to the Trustee for cancellation all the Notes so
     accepted for exchange; and

               (iii)  cause the Trustee to authenticate and deliver promptly to
     each Holder of the Notes, Exchange Notes or Private Exchange Notes, as the
     case may be, equal in principal amount to the Notes of such Holder so
     accepted for exchange.

          The Indenture will provide that the Exchange Notes will not be subject
to the transfer restrictions set forth in the Indenture and that all the
Securities will vote and consent together on all matters as one class and that
none of the Securities will have the right to vote or consent as a class
separate from one another on any matter.

          Interest on each Exchange Note and Private Exchange Note issued
pursuant to the Registered Exchange Offer and in the Private Exchange will
accrue from the last interest payment date on which interest was paid on the
Notes surrendered in exchange therefor or, if no interest has been paid on the
Notes, from the date of original issue of the Notes.

          Each Holder participating in the Registered Exchange Offer shall be
required to represent to the Company that at the time of the consummation of the
Registered Exchange Offer (i) any Exchange Notes received by such Holder will be
acquired in the ordinary course of business, (ii) such Holder will have no
arrangements or understanding with any person to participate in the distribution
of the Notes or the Exchange Notes within the meaning of the Securities Act,
(iii) such Holder is not an "affiliate," as defined in Rule 405 of the
Securities Act, of the Company or if it is an affiliate, such Holder will comply
with the registration and prospectus delivery requirements of the Securities Act
to the extent applicable, (iv) if such Holder is not a broker-dealer, that it is
not engaged in, and does not intend to engage in, the distribution of the
Exchange Notes and (v) if such Holder is a broker-dealer, that it will receive
Exchange Notes for its own account in exchange for Notes that were acquired as a
result of market-making activities or other trading activities and that it will
be required to acknowledge that it will deliver a prospectus in connection with
any resale of such Exchange Notes.

                                       3
<PAGE>
 
          Notwithstanding any other provisions hereof, the Company will ensure
that (i) any Exchange Offer Registration Statement and any amendment thereto and
any prospectus forming part thereof and any supplement thereto complies in all
material respects with the Securities Act and the rules and regulations
thereunder, (ii) any Exchange Offer Registration Statement and any amendment
thereto does not, when it becomes effective, contain an untrue statement of a
material fact or omit to state a material fact required to be stated therein or
necessary to make the statements therein not misleading and (iii) any prospectus
forming part of any Exchange Offer Registration Statement, and any supplement to
such prospectus, does not include an untrue statement of a material fact or omit
to state a material fact required to be stated therein or necessary in order to
make the statements therein, in the light of the circumstances under which they
were made, not misleading.

          2.   Shelf Registration.  If, (i) because of any change in law or in
applicable interpretations thereof by the staff of the Commission, the Company
is not permitted to effect a Registered Exchange Offer, as contemplated by
Section 1 hereof, (ii) the Registered Exchange Offer is not consummated within
180 days of the Issue Date, (iii) any Initial Purchaser so requests with respect
to the Notes (or the Private Exchange Notes) not eligible to be exchanged for
Exchange Notes in the Registered Exchange Offer and held by it following
consummation of the Registered Exchange Offer or (iv) any Holder (other than an
Exchanging Dealer) is not eligible to participate in the Registered Exchange
Offer or, in the case of any Holder (other than an Exchanging Dealer) that
participates in the Registered Exchange Offer, such Holder does not receive
freely tradeable Exchange Notes on the date of the exchange, the Company shall
take the following actions:

          (a) The Company shall, at its cost, as promptly as practicable (but in
no event more than 30 days after so required or requested pursuant to this
Section 2) file with the Commission and thereafter shall use its best efforts to
cause to be declared effective a registration statement (the "Shelf Registration
Statement" and, together with the Exchange Offer Registration Statement, a
"Registration Statement") on an appropriate form under the Securities Act
relating to the offer and sale of the Transfer Restricted Notes by the Holders
thereof from time to time in accordance with the methods of distribution set
forth in the Shelf Registration Statement and Rule 415 under the Securities Act
(hereinafter, the "Shelf Registration"); provided, however, that no Holder
(other than an Initial Purchaser) shall be entitled to have the Securities held
by it covered by such Shelf Registration Statement unless such Holder agrees in
writing to be bound by all the provisions of this Agreement applicable to such
Holder.

          (b) The Company shall use its best efforts to keep the Shelf
Registration Statement continuously effective in order to permit the prospectus
included therein to be lawfully delivered by the Holders of the relevant
Securities, for a period of three years (or for such longer period if extended
pursuant to Section 3(j) below) from the date of its effectiveness or such
shorter period that will terminate when the Notes covered by the Shelf
Registration Statement can be sold pursuant to Rule 144 without any limitations
under clauses (c), (e), (f) and (h) of Rule 144 (or any successor rule thereof);
provided, however, that the Company shall not be obligated to keep the Shelf
Registration Statement effective if (i) the Company determines, in its
reasonable judgment, upon advice of counsel, as authorized by a resolution of
its Board of Directors, that the continued effectiveness and usability of the
Shelf Registration Statement would (x) require the disclosure of material
information, which the Company has a bona fide business reason for preserving as
confidential, or (y) interfere with any financing, acquisition, corporate
reorganization or other material transaction involving the Company or any of its
subsidiaries or its parent, provided that the failure to keep the Shelf
Registration Statement effective and usable for offers and sales of Securities
for such reasons shall last no longer than 45 days in any 12-month period
(whereafter Additional Interest (as defined in Section 6(a)) shall accrue and be
payable), and (ii) the Company promptly thereafter complies with the
requirements of Section 3(j) hereof, if applicable.  Any such period during
which the Company is excused from keeping the Shelf Registration Statement
effective and usable for offers and sales of Securities is referred to herein as
a "Suspension Period."  A Suspension Period shall commence on and include the
date that the

                                       4
<PAGE>
 
Company gives notice that the registration statement is no longer effective or
the prospectus included therein is no longer usable for offers and sales of
Securities and shall end on the earlier to occur of (1) the date on which each
seller of Securities covered by the Shelf Registration Statement either receives
the copies of the supplemented or amended prospectus contemplated by Section
3(j) hereof or is advised in writing by the Company that use of the prospectus
may be resumed and (2) the expiration of 45 days in any 12-month period during
which one or more Suspension Periods has been in effect.  The Company shall be
deemed not to have used its best efforts to keep the Shelf Registration
Statement effective during the requisite period if it voluntarily takes any
action that would result in Holders of Securities covered thereby not being able
to offer and sell such securities during that period, unless such action is
required by applicable law.

          (c) Notwithstanding any other provisions of this Agreement to the
contrary, the Company shall cause the Shelf Registration Statement and the
related prospectus and any amendment or supplement thereto, as of the effective
date of the Shelf Registration Statement, amendment or supplement, (i) to comply
in all material respects with the applicable requirements of the Securities Act
and the rules and regulations of the Commission and (ii) not to contain any
untrue statement of a material fact or omit to state a material fact required to
be stated therein or necessary in order to make the statements therein, in light
of the circumstances under which they were made, not misleading.

          3.   Registration Procedures.  In connection with any Shelf
Registration contemplated by Section 2 hereof and, to the extent applicable, any
Registered Exchange Offer contemplated by Section 1 hereof, the following
provisions shall apply:

          (a) The Company shall (i) furnish to each Initial Purchaser, prior to
the filing thereof with the Commission, a copy of the Registration Statement and
each amendment thereof and each supplement, if any, to the prospectus included
therein and, in the event that an Initial Purchaser (with respect to any portion
of an unsold allotment from the original offering) is participating in the
Registered Exchange Offer or the Shelf Registration, the Company shall use its
best efforts to reflect in each such document when so filed with the Commission,
such comments as such Initial Purchaser reasonably may propose; (ii) include the
information set forth in Annex A hereto on the cover, in Annex B hereto in the
"Exchange Offer Procedures" section and the "Purpose of the Exchange Offer"
section and in Annex C hereto in the "Plan of Distribution" section of the
prospectus forming a part of the Exchange Offer Registration Statement and
include the information set forth in Annex D hereto in the Letter of Transmittal
delivered pursuant to the Registered Exchange Offer; (iii) if requested by an
Initial Purchaser, include the information required by Items 507 or 508 of
Regulation S-K under the Securities Act, as applicable, in the prospectus
forming a part of the Exchange Offer Registration Statement; (iv) include within
the prospectus contained in the Exchange Offer Registration Statement a section
entitled "Plan of Distribution," reasonably acceptable to the Initial
Purchasers, which shall contain a summary statement of the positions taken or
policies made by the staff of the Commission with respect to the potential
"underwriter" status of any broker-dealer that is the beneficial owner (as
defined in Rule 13d-3 under the Securities Exchange Act of 1934, as amended (the
"Exchange Act")) of Exchange Notes received by such broker-dealer in the
Registered Exchange Offer (a "Participating Broker-Dealer"), whether such
positions or policies have been publicly disseminated by the staff of the
Commission or such positions or policies, in the reasonable judgment of the
Initial Purchasers based upon advice of counsel (which may be in-house counsel),
represent the prevailing views of the staff of the Commission; and (v) in the
case of a Shelf Registration Statement, include the names of the Holders, who
propose to sell Securities pursuant to the Shelf Registration Statement, as
selling securityholders.

          (b) The Company shall give written notice to the Initial Purchasers,
the Holders of the Securities and any Participating Broker-Dealer from whom the
Company has received prior written notice that it will be a Participating
Broker-Dealer in the Registered Exchange Offer (which

                                       5
<PAGE>
 
notice pursuant to clauses (ii)-(v) hereof shall be accompanied by an
instruction to suspend the use of the prospectus until the requisite changes
have been made):

               (i) when the Registration Statement or any amendment thereto has
     been filed with the Commission and when the Registration Statement or any
     post-effective amendment thereto has become effective;

               (ii) of any request by the Commission for amendments or
     supplements to the Registration Statement or the prospectus included
     therein;

               (iii)  of the issuance by the Commission of any stop order
     suspending the effectiveness of the Registration Statement or the
     initiation of any proceedings for that purpose;

               (iv) of the receipt by the Company or its legal counsel of any
     notification with respect to the suspension of the qualification of the
     Securities for sale in any jurisdiction or the initiation or threatening of
     any proceeding for such purpose; and

               (v) of the happening of any event that requires the Company to
     make changes in the Registration Statement or the prospectus in order that
     the Registration Statement or the prospectus do not contain an untrue
     statement of a material fact nor omit to state a material fact required to
     be stated therein or necessary to make the statements therein (in the case
     of the prospectus, in the light of the circumstances under which they were
     made) not misleading.

          (c) The Company shall make every reasonable effort to obtain the
withdrawal at the earliest possible time, of any order suspending the
effectiveness of the Registration Statement.

          (d) The Company shall furnish to each Holder of Securities included
within the coverage of the Shelf Registration, without charge, at least one copy
of the Shelf Registration Statement and any post-effective amendment thereto,
including financial statements and schedules, and, if the Holder so requests in
writing, all exhibits thereto (including those, if any, incorporated by
reference other then exhibits to such incorporated documents unless such
exhibits are specifically incorporated by reference into such incorporated
documents).

          (e) The Company shall deliver to each Exchanging Dealer and each
Initial Purchaser, and to any other Holder who so requests, without charge, at
least one copy of the Exchange Offer Registration Statement and any post-
effective amendment thereto, including financial statements and schedules, and,
if any Initial Purchaser or any such Holder requests, all exhibits thereto
(including those, if any, incorporated by reference other then exhibits to such
incorporated documents unless such exhibits are specifically incorporated by
reference into such incorporated documents).

          (f) The Company shall, during the Shelf Registration Period, deliver
to each Holder of Securities included within the coverage of the Shelf
Registration, without charge, as many copies of the prospectus (including each
preliminary prospectus) included in the Shelf Registration Statement and any
amendment or supplement thereto as such person may reasonably request.  The
Company consents, subject to the provisions of this Agreement, to the use of the
prospectus or any amendment or supplement thereto by each of the selling Holders
of the Securities in connection with the offering and sale of the Securities
covered by the prospectus, or any amendment or supplement thereto, included in
the Shelf Registration.

          (g) The Company shall deliver to each Initial Purchaser, any
Exchanging Dealer, any Participating Broker-Dealer and such other persons
required to deliver a prospectus following the Registered Exchange Offer,
without charge, as many copies of the final prospectus included in the

                                       6
<PAGE>
 
Exchange Offer Registration Statement and any amendment or supplement thereto as
such persons may reasonably request.  The Company consents, subject to the
provisions of this Agreement, to the use of the prospectus or any amendment or
supplement thereto by any Initial Purchaser, if necessary, any Participating
Broker-Dealer and such other persons required to deliver a prospectus following
the Registered Exchange Offer in connection with the offering and sale of the
Exchange Notes covered by the prospectus, or any amendment or supplement
thereto, included in the Registered Exchange Offer.

          (h) Prior to any public offering of the Securities, pursuant to any
Registration Statement, the Company shall register or qualify or cooperate with
the Holders of the Securities included therein and their respective counsel in
connection with the registration or qualification of the Securities for offer
and sale under the securities or "blue sky" laws of such states of the United
States as any Holder of the Securities reasonably requests in writing and do any
and all other acts or things necessary or advisable to enable the offer and sale
in such jurisdictions of the Securities covered by such Registration Statement;
provided, however, that the Company shall not be required to (i) qualify
generally to do business in any jurisdiction where it is not then so qualified
or (ii) take any action that would subject it to general service of process or
to taxation in any jurisdiction where it is not then so subject.

          (i) The Company shall cooperate with the Holders of the Securities to
facilitate the timely preparation and delivery of certificates representing the
Securities to be sold pursuant to any Registration Statement free of any
restrictive legends and in such denominations and registered in such names as
the Holders may request a reasonable period of time prior to sales of the
Securities pursuant to such Registration Statement.

          (j) Upon the occurrence of any event contemplated by paragraphs (ii)
through (v) of Section 3(b) above during the period for which the Company is
required to maintain an effective Registration Statement, the Company shall
promptly prepare and file a post-effective amendment to the Registration
Statement or supplement to the related prospectus and any other required
document so that, as thereafter delivered to Holders of the Notes or purchasers
of Securities, the prospectus will not contain an untrue statement of a material
fact or omit to state any material fact required to be stated therein or
necessary to make the statements therein, in the light of the circumstances
under which they were made, not misleading.  If the Company notifies the Initial
Purchasers, the Holders of the Securities and any known Participating Broker-
Dealer in accordance with paragraphs (ii) through (v) of Section 3(b) above to
suspend the use of the prospectus until the requisite changes to the prospectus
have been made, then the Initial Purchasers, the Holders of the Securities and
any such Participating Broker-Dealers shall suspend use of such prospectus, and
the period of effectiveness of the Shelf Registration Statement provided for in
Section 2(b) above and the Exchange Offer Registration Statement provided for in
Section 1 above shall each be extended by the number of days from and including
the date of the giving of such notice to and including the date when the Initial
Purchasers, the Holders of the Securities and any known Participating Broker-
Dealer shall have received such amended or supplemented prospectus pursuant to
this Section 3(j).

          (k) Not later than the effective date of the applicable Registration
Statement, the Company will provide a CUSIP number for the Notes, the Exchange
Notes or the Private Exchange Notes, as the case may be, and provide the
applicable trustee with printed certificates for the Notes, the Exchange Notes
or the Private Exchange Notes, as the case may be, in a form eligible for
deposit with The Depository Trust Company.

          (l) The Company will comply with all rules and regulations of the
Commission to the extent and so long as they are applicable to the Registered
Exchange Offer or the Shelf Registration and will make generally available to
its security holders (or otherwise provide in accordance with Section 11(a) of
the Securities Act) an earnings statement satisfying the provisions of Section
11(a) of the Securities Act, no later than 45 days after the end of a 12-month
period (or 90

                                       7
<PAGE>
 
days, if such period is a fiscal year) beginning with the first month of the
Company's first fiscal quarter commencing after the effective date of the
Registration Statement, which statement shall cover such 12-month period.

          (m) The Company shall cause the Indenture to be qualified under the
Trust Indenture Act of 1939, as amended, in a timely manner and containing such
changes, if any, as shall be necessary for such qualification.  In the event
that such qualification would require the appointment of a new trustee under the
Indenture, the Company shall appoint a new trustee thereunder pursuant to the
applicable provisions of the Indenture.

          (n) The Company may require each Holder of Securities to be sold
pursuant to the Shelf Registration Statement to furnish to the Company such
information regarding the Holder and the distribution of the Securities as the
Company may from time to time reasonably require for inclusion in the Shelf
Registration Statement, and the Company may exclude from such registration the
Securities of any Holder that unreasonably fails to furnish such information
within a reasonable time after receiving such request.

          (o) In the case of any Shelf Registration, if the Securities are to be
sold in an underwritten offering, the Company shall, if requested, enter into an
underwriting agreement in customary form and cooperate to take such other
actions as may be reasonably requested in connection therewith.

          (p) In the case of any Shelf Registration, the Company shall (i) make
reasonably available for inspection by the Holders of the Securities, any
underwriter participating in any disposition pursuant to the Shelf Registration
Statement and any attorney, accountant or other agent retained by the Holders of
the Securities or any such underwriter all relevant financial and other records,
pertinent corporate documents and properties of the Company and (ii) cause the
Company's officers, directors, employees, accountants and auditors to supply all
relevant information reasonably requested by the Holders of the Securities or
any such underwriter, attorney, accountant or agent in connection with the Shelf
Registration Statement, in each case, as shall be reasonably necessary to enable
such persons to conduct a reasonable investigation within the meaning of Section
11 of the Securities Act; provided,  however, that the foregoing inspection and
information gathering shall be coordinated on behalf of the Initial Purchasers
by the Initial Purchasers and on behalf of the other parties, by one counsel
designated by and on behalf of such other parties as described in Section 4
hereof.

          (q) In the case of any Shelf Registration, the Company, if requested
by any Holder of Securities covered thereby, shall cause (i) its counsel to
deliver an opinion and updates thereof relating to the Securities in customary
form addressed to such Holders and the managing underwriters, if any, thereof
and dated, in the case of the initial opinion, the effective date of such Shelf
Registration Statement (it being agreed that the matters to be covered by such
opinion shall include, without limitation, the due incorporation and good
standing of the Company and its subsidiaries incorporated in the United States;
the qualification of the Company and such subsidiaries to transact business as
foreign corporations; the due authorization, execution and delivery of the
relevant agreement of the type referred to in Section 3(o) hereof; the due
authorization, execution, authentication and issuance, and the validity and
enforceability, of the applicable Securities; the absence of material legal or
governmental proceedings involving the Company and its subsidiaries; the absence
of governmental approvals required to be obtained in connection with the Shelf
Registration Statement, the offering and sale of the applicable Securities, or
any agreement of the type referred to in Section 3(o) hereof, the compliance as
to form of such Shelf Registration Statement and any documents incorporated by
reference therein and of the Indenture with the requirements of the Securities
Act and the Trust Indenture Act, respectively; and, as of the date of the
opinion and as of the effective date of the Shelf Registration Statement or most
recent post-effective amendment thereto, as the case may be, a

                                       8
<PAGE>
 
statement of such counsel that it has no reason to believe that such Shelf
Registration Statement or the prospectus included therein, as then amended or
supplemented, or any documents incorporated by reference therein contained an
untrue statement of a material fact or omitted to state therein a material fact
required to be stated therein or necessary to make the statements therein not
misleading (in the case of any such documents, in the light of the circumstances
existing at the time that such documents were filed with the Commission under
the Exchange Act)); (ii) its officers to execute and deliver all customary
documents and certificates and updates thereof requested by any underwriters of
the applicable Securities and (iii) its independent public accountants and the
independent public accountants with respect to any other entity for which
financial information is provided in the Shelf Registration Statement to provide
to the selling Holders of the applicable Securities and any underwriter therefor
a comfort letter in customary form and covering matters of the type customarily
covered in comfort letters in connection with primary underwritten offerings,
subject to receipt of appropriate documentation as contemplated by Statement of
Auditing Standards No. 72.

          (r) In the case of the Registered Exchange Offer, if requested by any
Initial Purchaser or any known Participating Broker-Dealer, the Company shall
cause (i) its counsel to deliver to such Initial Purchaser or such Participating
Broker-Dealer a signed opinion in the form set forth in Sections 6(d), (e) and
(f) of the Purchase Agreement with such changes as are customary in connection
with the preparation of a Registration Statement and (ii) its independent public
accountants and the independent public accountants with respect to any other
entity for which financial information is provided in the Registration Statement
to deliver to such Initial Purchaser or such Participating Broker-Dealer a
comfort letter, in customary form, meeting the requirements as to the substance
thereof as set forth in Sections 6(a) and (b) of the Purchase Agreement, with
appropriate date changes.

          (s) If a Registered Exchange Offer or a Private Exchange is to be
consummated, upon delivery of the Notes by Holders to the Company (or to such
other person or entity as directed by the Company) in exchange for the Exchange
Notes or the Private Exchange Notes, as the case may be, the Company shall mark,
or cause to be marked, on the Notes so exchanged that such Notes are being
canceled in exchange for the Exchange Notes or the Private Exchange Notes, as
the case may be; in no event shall the Notes be marked as paid or otherwise
satisfied.

          (t) The Company will use its best efforts to either (i) confirm that
the ratings obtained for the Notes prior to the initial sale of such Notes will
apply to the Securities covered by a Registration Statement or (ii) cause the
Securities covered by a Registration Statement to be rated with the appropriate
rating agencies, if so requested by Holders of a majority in aggregate principal
amount of Securities covered by such Registration Statement, or by the managing
underwriters, if any.

          (u) In the event that any broker-dealer registered under the Exchange
Act shall underwrite any Securities or participate as a member of an
underwriting syndicate or selling group or "participate in the distribution,"
(within the meaning of the Conduct Rules (the "Rules") of the National
Association of Securities Dealers, Inc. ("NASD")) thereof, whether as a Holder
of such Securities or as an underwriter, a placement or sales agent or a broker
or dealer in respect thereof, or otherwise, the Company will assist such broker-
dealer in complying with the requirements of the Rules, including, without
limitation, by (i) if such Rules, including Rule 2720 thereto, shall so require,
engaging a "qualified independent underwriter", (as defined in Rule 2720) to
participate in the preparation of the Registration Statement relating to such
Securities, to exercise usual standards of due diligence in respect thereto and,
if any portion of the offering contemplated by such Registration Statement is an
underwritten offering or is made through a placement or sales agent, to
recommend the yield of such Securities, (ii) indemnifying any such qualified
independent underwriter to the extent of the indemnification of underwriters
provided in Section 5 hereof and (iii) providing such information to such
broker-dealer as may be required in order for such broker-dealer to comply with
the requirements of the Rules.

                                       9
<PAGE>
 
          (v) The Company shall use its best efforts to take all other steps
necessary to effect the registration of the Securities covered by a Registration
Statement contemplated hereby.

          4.   Registration Expenses.  The Company shall bear all fees and
expenses incurred in connection with the performance of its obligations under
Sections 1 through 3 hereof (including the reasonable fees and expenses, if any,
of Dewey Ballantine, counsel for the Initial Purchasers, incurred in connection
with the Registered Exchange Offer), whether or not any Registration Statement
is filed or becomes effective, and, in the event of a Shelf Registration, shall
bear or reimburse the Holders of the Securities covered thereby for the
reasonable fees and disbursements of one firm of counsel designated by the
Holders of a majority in principal amount of the Securities covered thereby to
act as counsel for the Holders of the Securities in connection therewith.

          5.   Indemnification.  (a)  The Company agrees to indemnify and hold
harmless each Holder of the Securities, any Participating Broker-Dealer and each
person, if any, who controls such Holder or such Participating Broker-Dealer
within the meaning of the Securities Act or the Exchange Act (each Holder, any
Participating Broker-Dealer and such controlling persons are referred to
collectively as the "Indemnified Parties") from and against any losses, claims,
damages or liabilities, joint or several, or any actions in respect thereof
(including, but not limited to, any losses, claims, damages, liabilities or
actions relating to purchases and sales of the Securities) to which each
Indemnified Party may become subject under the Securities Act, the Exchange Act
or otherwise, insofar as such losses, claims, damages, liabilities or actions
arise out of or are based upon any untrue statement or alleged untrue statement
of a material fact contained in a Registration Statement or prospectus or in any
amendment or supplement thereto or in any preliminary prospectus relating to a
Shelf Registration, or arise out of, or are based upon, the omission or alleged
omission to state therein a material fact required to be stated therein or
necessary to make the statements therein (in the case of any prospectus, in the
light of the circumstances under which they are made) not misleading, and shall
reimburse, as incurred, the Indemnified Parties for any legal or other expenses
reasonably incurred by them in connection with investigating or defending any
such loss, claim, damage, liability or action in respect thereto; provided,
however, that (i) the Company shall not be liable in any such case to the extent
that such loss, claim, damage or liability arises out of or is based upon any
untrue statement or alleged untrue statement or omission or alleged omission
made in a Registration Statement or prospectus or in any amendment or supplement
thereto or in any preliminary prospectus relating to a Shelf Registration in
reliance upon and in conformity with written information pertaining to such
Holder and furnished to the Company by or on behalf of such Holder specifically
for inclusion therein and (ii) with respect to any untrue statement or omission
or alleged untrue statement or omission made in any preliminary prospectus
relating to a Shelf Registration Statement, the indemnity agreement contained in
this subsection (a) shall not inure to the benefit of any Holder or
Participating Broker-Dealer from whom the person asserting any such losses,
claims, damages or liabilities purchased the Securities concerned, to the extent
that a prospectus relating to such Securities was required to be delivered by
such Holder or Participating Broker-Dealer under the Securities Act in
connection with such purchase and any such loss, claim, damage or liability of
such Holder or Participating Broker-Dealer results from the fact that there was
not sent or given to such person, at, or prior to the written confirmation of
the sale of such Securities to such person, a copy of the final prospectus if
the Company had previously furnished copies thereof to such Holder or
Participating Broker-Dealer; provided further, however, that this indemnity
agreement will be in addition to any liability which the Company may otherwise
have to such Indemnified Party.  The Company shall also indemnify underwriters,
selling brokers, dealer-managers and similar securities industry professionals
participating in the distribution (as described in such Registration Statement)
their officers and directors and each person who controls such persons within
the meaning of the Securities Act or the Exchange Act to the same extent as
provided above with respect to the indemnification of the Holders of the
Securities if requested by such Holders.

                                       10
<PAGE>
 
          (b) Each Holder of the Securities, severally and not jointly, will
indemnify and hold harmless the Company and each person, if any, who controls
the Company within the meaning of the Securities Act or the Exchange Act from
and against any losses, claims, damages or liabilities or any actions in respect
thereof, to which the Company or any such controlling person may become subject
under the Securities Act, the Exchange Act or otherwise, insofar as such losses,
claims, damages, liabilities or actions arise out of or are based upon any
untrue statement or alleged untrue statement of a material fact contained in a
Registration Statement or prospectus or in any amendment or supplement thereto
or in any preliminary prospectus relating to a Shelf Registration, or arise out
of or are based upon the omission or alleged omission to state therein a
material fact necessary to make the statements therein (in the case of any
prospectus, in the light of the circumstances under which they are made) not
misleading, but in each case only to the extent that the untrue statement or
alleged untrue statement or omission or alleged omission was made in reliance
upon and in conformity with written information pertaining to such Holder and
furnished to the Company by or on behalf of such Holder specifically for
inclusion therein; and, subject to the limitation set forth immediately
preceding this clause, shall reimburse, as incurred, the Company for any legal
or other expenses reasonably incurred by the Company or any such controlling
person in connection with investigating or defending any loss, claim, damage,
liability or action in respect thereof.  This indemnity agreement will be in
addition to any liability which such Holder may otherwise have to the Company or
any of its controlling persons.

          (c) Promptly after receipt by an indemnified party under this Section
5 of notice of the commencement of any action or proceeding (including a
governmental investigation), such indemnified party will, if a claim in respect
thereof is to be made against the indemnifying party under this Section 5,
notify the indemnifying party of the commencement thereof; but the omission so
to notify the indemnifying party will not, in any event, relieve the
indemnifying party from any obligations to any indemnified party other than the
indemnification obligation provided in paragraph (a) or (b) above to the extent
that the indemnifying party is not materially prejudiced thereby.  In case any
such action is brought against any indemnified party, and it notifies the
indemnifying party of the commencement thereof, the indemnifying party will be
entitled to participate therein and, to the extent that it may wish, jointly
with any other indemnifying party similarly notified, to assume the defense
thereof, with counsel reasonably satisfactory to such indemnified party (who
shall not, except with the consent of the indemnified party, be counsel to the
indemnifying party), and after notice from the indemnifying party to such
indemnified party of its election so to assume the defense thereof the
indemnifying party will not be liable to such indemnified party under this
Section 5 for any legal or other expenses, other than reasonable costs of
investigation, subsequently incurred by such indemnified party in connection
with the defense thereof.  No indemnifying party shall, without the prior
written consent of the indemnified party, effect any settlement of any pending
or threatened action in respect of which any indemnified party is or could have
been a party and indemnity could have been sought hereunder by such indemnified
party unless such settlement includes an unconditional release of such
indemnified party from all liability on any claims that are the subject matter
of such action.

          (d) If the indemnification provided for in this Section 5 is
unavailable or insufficient to hold harmless an indemnified party under
subsections (a) or (b) above, then each indemnifying party shall contribute to
the amount paid or payable by such indemnified party as a result of the losses,
claims, damages or liabilities (or actions in respect thereof) referred to in
subsection (a) or (b) above (i) in such proportion as is appropriate to reflect
the relative benefits received by the indemnifying party or parties on the one
hand and the indemnified party on the other from the exchange of the Notes,
pursuant to the Registered Exchange Offer, or (ii) if the allocation provided by
the foregoing clause (i) is not permitted by applicable law, in such proportion
as is appropriate to reflect not only the relative benefits referred to in
clause (i) above but also the relative fault of the indemnifying party or
parties on the one hand and the indemnified party on the other in connection
with the statements or omissions that resulted in such losses, claims, damages
or liabilities (or actions in respect thereof) as well as any other relevant
equitable considerations.  The relative fault of the parties shall be determined
by reference to, among other things, whether the untrue or alleged untrue
statement

                                       11
<PAGE>
 
of a material fact or the omission or alleged omission to state a material fact
relates to information supplied by the Company on the one hand or such Holder or
such other indemnified person, as the case may be, on the other, and the
parties' relative intent, knowledge, access to information and opportunity to
correct or prevent such statement or omission.  The amount paid by an
indemnified party as a result of the losses, claims, damages or liabilities
referred to in the first sentence of this subsection (d) shall be deemed to
include any legal or other expenses reasonably incurred by such indemnified
party in connection with investigating or defending any action or claim which is
the subject of this subsection (d).  Notwithstanding any other provision of this
Section 5(d), the Holders of the Securities shall not be required to contribute
any amount in excess of the amount by which the net proceeds received by such
Holders from the sale of the Securities pursuant to a Registration Statement
exceeds the amount of damages which such Holders have otherwise been required to
pay by reason of such untrue or alleged untrue statement or omission or alleged
omission. No person guilty of fraudulent misrepresentation (within the meaning
of Section 11(f) of the Securities Act) shall be entitled to contribution from
any person who was not guilty of such fraudulent misrepresentation.  For
purposes of this paragraph (d), each person, if any, who controls such
indemnified party within the meaning of the Securities Act or the Exchange Act
shall have the same rights to contribution as such indemnified party and each
person, if any, who controls the Company within the meaning of the Securities
Act or the Exchange Act shall have the same rights to contribution as the
Company.

          (e) The agreements contained in this Section 5 shall survive the sale
of the Securities pursuant to a Registration Statement and shall remain in full
force and effect, regardless of any termination or cancellation of this
Agreement or any investigation made by or on behalf of any indemnified party.

          6.   Additional Interest Under Certain Circumstances.  (a)  Additional
interest (the "Additional Interest") with respect to the Securities shall be
assessed as follows if any of the following events occur (each such event in
clauses (i) through (iii) below a "Registration Default"):

               (i) If by May 22, 1997, neither the Exchange Offer Registration
     Statement nor a Shelf Registration Statement has been filed with the
     Commission;

               (ii) If by October 4, 1997, neither the Registered Exchange Offer
     is consummated nor, if required in lieu thereof, the Shelf Registration
     Statement is declared effective by the Commission; or

               (iii)  If after either the Exchange Offer Registration Statement
     or the Shelf Registration Statement is declared effective (other than
     during a Suspension Period with respect to a Shelf Registration Statement)
     (A) such Registration Statement thereafter ceases to be effective (unless
     all Securities have been previously exchanged or the obligation to maintain
     the effectiveness of such Registration Statement has expired); or (B) such
     Registration Statement or the related prospectus ceases to be usable
     (except as permitted in paragraph (b)) in connection with resales of
     Transfer Restricted Notes during the periods specified herein because
     either (1) any event occurs as a result of which the related prospectus
     forming part of such Registration Statement would include any untrue
     statement of a material fact or omit to state any material fact necessary
     to make the statements therein in the light of the circumstances under
     which they were made not misleading, or (2) it shall be necessary to amend
     such Registration Statement or supplement the related prospectus, to comply
     with the Securities Act or the Exchange Act or the respective rules
     thereunder.

Additional Interest shall accrue on the Notes over and above the interest set
forth in the title of the Notes from and including the date on which any such
Registration Default shall occur to but excluding the date on which all such
Registration Defaults have been cured, at a rate of 0.50% per annum.

                                       12
<PAGE>
 
          (b) A Registration Default referred to in Section 6(a)(iii)(B) hereof
shall be deemed not to have occurred and be continuing in relation to a Shelf
Registration Statement or the related prospectus if (i) such Registration
Default has occurred solely as a result of (x) the filing of a post-effective
amendment to such Shelf Registration Statement to incorporate annual audited
financial information with respect to the Company where such post-effective
amendment is not yet effective and needs to be declared effective to permit
Holders to use the related prospectus or (y) other material events with respect
to the Company that would need to be described in such Shelf Registration
Statement or the related prospectus and (ii) in the case of clause (y), the
Company is proceeding promptly and in good faith to amend or supplement such
Shelf Registration Statement and related prospectus to describe such events;
provided, however, that in any case if such Registration Default occurs for a
continuous period in excess of 30 days, Additional Interest shall be payable in
accordance with the above paragraph from the day such Registration Default
occurs until such Registration Default is cured.

          (c) Any amounts of Additional Interest due pursuant to clause (i),
(ii) or (iii) of Section 6(a) above will be payable in cash on the regular
interest payment dates with respect to the Notes.  The amount of Additional
Interest will be determined by multiplying the applicable Additional Interest
rate by the principal amount of the Notes, multiplied by a fraction, the
numerator of which is the number of days such Additional Interest rate was
applicable during such period (determined on the basis of a 360-day year
comprised of twelve 30-day months), and the denominator of which is 360.

          (d) "Transfer Restricted Notes" means each Security until (i) the date
on which such Security has been exchanged by a person other than a broker-dealer
for a freely transferrable Exchange Note in the Registered Exchange Offer, (ii)
following the exchange by a broker-dealer in the Registered Exchange Offer of a
Security for an Exchange Note, the date on which such Exchange Note is sold to a
purchaser who receives from such broker-dealer on or prior to the date of such
sale a copy of the prospectus contained in the Exchange Offer Registration
Statement, (iii) the date on which such Security has been effectively registered
under the Securities Act and disposed of in accordance with the Shelf
Registration Statement or (iv) the date on which such Security is distributed to
the public pursuant to Rule 144 under the Securities Act or is saleable pursuant
to Rule 144(k) under the Securities Act.

          7.   Rules 144 and 144A.  The Company shall use its best efforts to
file the reports required to be filed by it under the Securities Act and the
Exchange Act in a timely manner and, if at any time the Company is not required
to file such reports, it will, upon the request of any Holder of Transfer
Restricted Notes, make publicly available other information so long as necessary
to permit sales of Transfer Restricted Notes pursuant to Rules 144 and 144A.
The Company covenants that it will take such further action as any Holder of
Transfer Restricted Notes may reasonably request, all to the extent required
from time to time to enable such Holder to sell Transfer Restricted Notes
without registration under the Securities Act within the limitation of the
exemptions provided by Rules 144 and 144A (including the requirements of Rule
144A(d)(4)).  The Company will provide a copy of this Agreement to prospective
purchasers of Notes identified to the Company by the Initial Purchasers upon
request.  Upon the request of any Holder of Transfer Restricted Notes, the
Company shall deliver to such Holder a written statement as to whether it has
complied with such requirements.  Notwithstanding the foregoing, nothing in this
Section 7 shall be deemed to require the Company to register any of its
securities pursuant to the Exchange Act.

          8.   Underwritten Registrations.  If any of the Transfer Restricted
Notes covered by any Shelf Registration are to be sold in an underwritten
offering, the investment banker or investment bankers and manager or managers
that will administer the offering ("Managing Underwriters") will be selected by
the Holders of a majority in aggregate principal amount of such Transfer
Restricted Notes to be included in such offering, subject to the approval of
such Managing Underwriters by the Company which shall not be unreasonably
withheld.

                                       13
<PAGE>
 
          No person may participate in any underwritten registration hereunder
unless such person (i) agrees to sell such person's Transfer Restricted Notes on
the basis reasonably provided in any underwriting arrangements approved by the
persons entitled hereunder to approve such arrangements and (ii) completes and
executes all questionnaires, powers of attorney, indemnities, underwriting
agreements and other documents reasonably required under the terms of such
underwriting arrangements.

          9.   Miscellaneous.

          (a) Amendments and Waivers.  The provisions of this Agreement may not
be amended, modified or supplemented, and waivers or consents to departures from
the provisions hereof may not be given, except by the Company and the written
consent of the Holders of a majority in principal amount of the Securities
affected by such amendment, modification, supplement, waiver or consents.

          (b) Notices.  All notices and other communications provided for or
permitted hereunder shall be made in writing by hand delivery, first-class mail,
facsimile transmission, or air courier which guarantees overnight delivery:

          (1) if to a Holder of the Securities, at the most current address
     given by such Holder to the Company;

          (2)  if to the Initial Purchasers, at its address as follows:

          Credit Suisse First Boston Corporation
          Eleven Madison Avenue
          New York, New York  10010-3629
          Fax No.: (212) 325-8278
          Attention: Investment Banking Department -- Transactions Advisory
          Group

     with a copy to:


          Dewey Ballantine
          1301 Avenue of the Americas
          New York, New York  10019
          Fax No.: (212) 259-6333
          Attention:  Morton A. Pierce

          (3) if to the Company, at its address as follows:

          Sterling Chemicals, Inc.
          1200 Smith, Suite 1900
          Houston, Texas  77002
          Fax No.:  (713) 654-9577
          Attention:  F. Maxwell Evans

     with a copy to:

          Andrews & Kurth, L.L.P.
          Texas Commerce Tower
          Suite 4200
          Houston, Texas  77002

                                       14
<PAGE>
 
          Fax No: (713) 220-4285
          Attention:  David G. Elkins

          All such notices and communications shall be deemed to have been duly
given: at the time delivered by hand, if personally delivered; three business
days after being deposited in the mail, postage prepaid, if mailed; when receipt
is acknowledged by recipient's facsimile machine operator, if sent by facsimile
transmission; and on the day delivered, if sent by overnight courier
guaranteeing next day delivery.

          (c) No Inconsistent Agreements.  The Company has not, as of the date
hereof, entered into, nor shall it, on or after the date hereof, enter into, any
agreement with respect to its securities that is inconsistent with the rights
granted to the Holders herein or otherwise conflicts with the provisions hereof.

          (d) Successors and Assigns.  This Agreement shall be binding upon the
Company and the Initial Purchasers and their respective successors and assigns,
including, without limitation and without the need for an express assignment,
subsequent holders of the Securities.

          (e) Counterparts.  This Agreement may be executed in any number of
counterparts and by the parties hereto in separate counterparts, each of which
when so executed shall be deemed to be an original and all of which taken
together shall constitute one and the same agreement.

          (f) Headings.  The headings in this Agreement are for convenience of
reference only and shall not limit or otherwise affect the meaning hereof.

          (g) Governing Law.  THIS AGREEMENT SHALL BE GOVERNED BY, AND CONSTRUED
IN ACCORDANCE WITH, THE LAWS OF THE STATE OF NEW YORK WITHOUT REGARD TO
PRINCIPLES OF CONFLICTS OF LAWS.

          (h) Severability.  If any one or more of the provisions contained
herein, or the application thereof in any circumstance, is held invalid, illegal
or unenforceable, the validity, legality and enforceability of any such
provision in every other respect and of the remaining provisions contained
herein shall not be affected or impaired thereby.

          (i) Securities Held by the Company.  Whenever the consent or approval
of Holders of a specified percentage of principal amount of Securities is
required hereunder, Securities held by the Company or its affiliates (other than
subsequent Holders of Securities if such subsequent Holders are deemed to be
affiliates solely by reason of their holdings of such Securities) shall not be
counted in determining whether such consent or approval was given by the Holders
of such required percentage.

                                       15
<PAGE>
 
          If the foregoing is in accordance with your understanding of our
agreement, please sign and return to the Company a counterpart hereof, whereupon
this instrument, along with all counterparts, will become a binding agreement
between the several Initial Purchasers and the Company in accordance with its
terms.

                                    Very truly yours,

                                    STERLING CHEMICALS, INC.


                                    By: ____________________
                                       Name:   Jim P. Wise
                                       Title:  Vice President and
                                               Chief Financial Officer



The foregoing Registration
Rights Agreement is hereby
confirmed and accepted as of
the date first above written.

CREDIT SUISSE FIRST BOSTON CORPORATION


By: _________________________
     Name:
     Title:


CHASE SECURITIES INC.


By: _________________________
     Name:
     Title:

                                       16
<PAGE>
 
                                                                         ANNEX A



Each broker-dealer that receives Exchange Notes for its own account pursuant to
the Exchange Offer must agree that it will deliver a prospectus in connection
with any resale of such Exchange Notes.  The Letter of Transmittal states that
by so acknowledging and by delivering a prospectus, a broker-dealer will not be
deemed to admit that it is an "underwriter" within the meaning of the Securities
Act.  This Prospectus, as it may be amended or supplemented from time to time,
may be used by a broker-dealer in connection with resales of Exchange Notes
received in exchange for Notes where such Notes were acquired by such broker-
dealer as a result of market-making activities or other trading activities.  The
Company has agreed that, for a period of 180 days after the Expiration Date (as
defined herein), it will make this Prospectus available to any broker-dealer for
use in connection with any such resale.  See "Plan of Distribution."

                                       17
<PAGE>
 
                                                                         ANNEX B



          Each broker-dealer that receives Exchange Notes for its own account in
exchange for Notes, where such Notes were acquired by such broker-dealer as a
result of market-making activities or other trading activities, must acknowledge
that it will deliver a prospectus in connection with any resale of such Exchange
Notes.  See "Plan of Distribution."

                                       18
<PAGE>
 
                                                                         ANNEX C



                              PLAN OF DISTRIBUTION

          Each broker-dealer that receives Exchange Notes for its own account
pursuant to the Exchange Offer must agree that it will deliver a prospectus in
connection with any resale of such Exchange Notes.  This Prospectus, as it may
be amended or supplemented from time to time, may be used by a broker-dealer in
connection with resales of Exchange Notes received in exchange for Existing
Notes where such Existing Notes were acquired as a result of market-making
activities or other trading activities.  The Company has agreed that, for a
period of 180 days after the Expiration Date, it will make this prospectus, as
amended or supplemented, available to any broker-dealer for use in connection
with any such resale.  In addition, until                     , 199 , all
dealers effecting transactions in the Exchange Notes may be required to deliver
a prospectus.*

          The Company will not receive any proceeds from any sale of Exchange
Notes by broker-dealers.  Exchange Notes received by broker-dealers for their
own account pursuant to the Exchange Offer may be sold from time to time in one
or more transactions in the over-the-counter market, in negotiated transactions,
through the writing of options on the Exchange Notes or a combination of such
methods of resale, at market prices prevailing at the time of resale, at prices
related to such prevailing market prices or negotiated prices.  Any such resale
may be made directly to purchasers or to or through brokers or dealers who may
receive compensation in the form of commissions or concessions from any such
broker-dealer or the purchasers of any such Exchange Notes.  Any broker-dealer
that resells Exchange Notes that were received by it for its own account
pursuant to the Exchange Offer and any broker or dealer that participates in a
distribution of such Exchange Notes may be deemed to be an "underwriter" within
the meaning of the Securities Act and any profit on any such resale of Exchange
Notes and any commission or concessions received by any such persons may be
deemed to be underwriting compensation under the Securities Act.  The Letter of
Transmittal states that, by acknowledging that it will deliver and by delivering
a prospectus, a broker-dealer will not be deemed to admit that it is an
"underwriter" within the meaning of the Securities Act.

          For a period of 180 days after the Expiration Date the Company will
promptly send additional copies of this Prospectus and any amendment or
supplement to this Prospectus to any broker-dealer that requests such documents
in the Letter of Transmittal.  The Company has agreed to pay all expenses
incident to the Exchange Offer (including the expenses of one counsel for the
Holders of the Notes) other than commissions or concessions of any brokers or
dealers and will indemnify the Holders of the Securities (including any broker-
dealers) against certain liabilities, including liabilities under the Securities
Act.



- ------------------------
 *   In addition, the legend required by Item 502(e) of Regulation S-K will
appear on the back cover page of the Exchange Offer prospectus.

                                       19
<PAGE>
 
                                                                         ANNEX D



[_]  CHECK HERE IF YOU ARE A BROKER-DEALER AND WISH TO RECEIVE 10 ADDITIONAL
     COPIES OF THE PROSPECTUS AND 10 COPIES OF ANY AMENDMENTS OR SUPPLEMENTS
     THERETO.

     Name:  __________________________________________________________
     Address:  _______________________________________________________
               _______________________________________________________



If the undersigned is not a broker-dealer, the undersigned represents that it is
not engaged in, and does not intend to engage in, a distribution of Exchange
Notes.  If the undersigned is a broker-dealer that will receive Exchange Notes
for its own account in exchange for Notes that were acquired as a result of
market-making activities or other trading activities, it agrees that it will
deliver a prospectus in connection with any resale of such Exchange Notes;
however, by so agreeing and by delivering a prospectus, the undersigned will not
be deemed to admit that it is an "underwriter" within the meaning of the
Securities Act.

                                       20

<PAGE>
 
                                                                     EXHIBIT 4.3


                               CREDIT AGREEMENT



                                     Among



                           STERLING CHEMICALS, INC.
                                as the Company



                                      and



                   TEXAS COMMERCE BANK NATIONAL ASSOCIATION
                   Individually and as Administrative Agent,



                          CREDIT SUISSE FIRST BOSTON
                    Individually and as Documentation Agent



                                      and



                            FINANCIAL INSTITUTIONS
                        NOW OR HEREAFTER PARTIES HERETO



                       $31,000,000 Tranche A Term Loans
                       $50,000,000 Tranche B Term Loans



                               January 31, 1997
<PAGE>
 
                               TABLE OF CONTENTS

                                   ARTICLE I
                           DEFINITIONS; CONSTRUCTION

     Section 1.01    Definitions..........................   2
     Section 1.02    Accounting Terms and Determinations..  25
     Section 1.03    Other Definitional Terms.............  25
 

                                  ARTICLE II
                           AMOUNT AND TERMS OF LOANS

     Section 2.01    Loans and Commitments................  25
     Section 2.02    Borrowing Requests...................  26
     Section 2.03    Replacement of Lenders...............  27
     Section 2.04    Disbursement of Funds................  27
     Section 2.05    Notes and Amortization...............  28
     Section 2.06    Interest.............................  29
     Section 2.07    Interest Periods.....................  30
     Section 2.08    Repayment of Loans...................  31
     Section 2.09    Termination of Commitments...........  32
     Section 2.10    Prepayments..........................  32
     Section 2.11    Continuation and Conversion Options..  35
     Section 2.12    Fees.................................  36
     Section 2.13    Payments, etc........................  36
     Section 2.14    Interest Rate Not Ascertainable, etc.  37
     Section 2.15    Illegality...........................  37
     Section 2.16    Increased Costs......................  38
     Section 2.17    Change of Lending Office.............  39
     Section 2.18    Funding Losses.......................  40
     Section 2.19    Sharing of Payments, etc.............  40
     Section 2.20    Taxes................................  40
     Section 2.21    Pro Rata Treatment...................  44
 

                                  ARTICLE III
                        CONDITIONS TO BORROWINGS AND TO
                      PURCHASE, RENEWAL AND REARRANGEMENT

     Section 3.01  Closing................................  44
     Section 3.02  Conditions Precedent to Loans..........  44

                                       i
<PAGE>
 
                                  ARTICLE IV
                        REPRESENTATIONS AND WARRANTIES

     Section 4.01    Corporate Existence..................  50
     Section 4.02    Corporate Power and Authorization....  50
     Section 4.03    Binding Obligations..................  51
     Section 4.04    No Legal Bar or Resultant Lien.......  51
     Section 4.05    No Consent...........................  51
     Section 4.06    Financial Information................  52
     Section 4.07    Investments and Guaranties...........  52
     Section 4.08    Litigation...........................  52
     Section 4.09    Use of Proceeds......................  52
     Section 4.10    Employee Benefits....................  53
     Section 4.11    Taxes; Governmental Charges..........  54
     Section 4.12    Titles, etc..........................  54
     Section 4.13    Defaults.............................  54
     Section 4.14    Casualties; Taking of Properties.....  55
     Section 4.15    Compliance with the Law..............  55
     Section 4.16    No Material Misstatements............  55
     Section 4.17    Investment Company Act...............  55
     Section 4.18    Public Utility Holding Company Act...  55
     Section 4.19    Subsidiaries.........................  55
     Section 4.20    Insurance............................  56
     Section 4.21    Environmental Matters................  56
     Section 4.22    Solvency.............................  57
     Section 4.23    Material Contracts...................  57
     Section 4.24    Employee Matters.....................  58
     Section 4.25    Senior Indebtedness..................  58

                                   ARTICLE V
                                   COVENANTS

     Section 5.01    Certain Affirmative Covenants........  58
          (a)        Maintenance and Compliance, etc......  58
          (b)        Payment of Taxes and Claims, etc.....  58
          (c)        Further Assurances...................  58
          (d)        Performance of Obligations...........  59
          (e)        Insurance............................  59
          (f)        Accounts and Records.................  59
          (g)        Right of Inspection..................  59
          (h)        Operation and Maintenance of Property  59
          (i)        Additional Subsidiaries; Permitted 
                      Acquisitions; Additional Liens......  60

                                       ii
<PAGE>
 
     Section 5.02    Reporting Covenants..................  61
           (a)       Annual Financial Statements..........  61
           (b)       Quarterly Financial Statements.......  61
           (c)       Monthly Financial Statements.........  62
           (d)       No Default/Compliance Certificate....  62
           (e)       Management Letters...................  62
           (f)       Title Information....................  63
           (g)       Events or Circumstances with respect 
                     to Collateral........................  63
           (h)       Notice of Certain Events.............  63
           (i)       Shareholder Communications, Filings..  63
           (j)       Litigation...........................  64
           (k)       ERISA................................  64
           (l)       Insurance Coverage...................  64
           (m)       Annual Budget........................  64
           (n)       Excess Cash Flow Certificate.........  64
           (o)       Other Information....................  64
     Section 5.03    Financial Covenants..................  64
           (a)       Interest Coverage Ratio..............  64
           (b)       Current Ratio........................  65
           (c)       Fixed Charge Coverage Ratio..........  65
           (d)       Leverage Ratio.......................  65
     Section 5.04    Certain Negative Covenants...........  66
           (a)       Indebtedness.........................  66
           (b)       Liens................................  67
           (c)       Mergers, Sales, etc..................  69
           (d)       Dividends, etc.......................  70
           (e)       Investments, Loans, etc..............  70
           (f)       Lease Payments.......................  72
           (g)       Sales and Leasebacks.................  72
           (h)       Nature of Business...................  72
           (i)       ERISA Compliance.....................  73
           (j)       Sale or Discount of Receivables......  74
           (k)       Negative Pledge Agreements...........  74
           (l)       Transactions with Affiliates.........  74
           (m)       Unconditional Purchase Obligations...  75
           (n)       Stock................................  75
           (o)       Capital Expenditures.................  75
           (p)       Modifications to Senior Subordinated 
                     Notes; No Voluntary Prepayments......  76
           (q)       Intercompany Transactions............  76
           (r)       Modification of Original Credit 
                     Agreement............................  77
           (s)       Modification or Amendment of the AFB 
                     Earnout Agreement....................  77
  

                                      iii
<PAGE>
 
                                  ARTICLE VI
                               EVENTS OF DEFAULT

     Section 6.01    Payments.........................................  77
     Section 6.02    Covenants Without Notice.........................  77
     Section 6.03    Other Covenants..................................  77
     Section 6.04    Other Financing Document Obligations.............  77
     Section 6.05    Representations..................................  78
     Section 6.06    Non-Payments of Other Indebtedness...............  78
     Section 6.07    Defaults Under Other Agreements..................  78
     Section 6.08    Bankruptcy.......................................  78
     Section 6.09    Money Judgment...................................  79
     Section 6.10    Discontinuance of Business.......................  79
     Section 6.11    Financing Documents..............................  79
     Section 6.12    Change of Control................................  79
     Section 6.13    Purchase Agreement Representations and Warranties  79
     Section 6.14    Albright Indemnity...............................  79
     Section 6.15    Default Under Senior Secured Discount Notes......  79
     Section 6.16    Senior Indebtedness..............................  80
     Section 6.17    Equity Note Contributions........................  80
     Section 6.18    Cytec Indemnity..................................  80
 

                                  ARTICLE VII
                                  THE AGENTS

     Section 7.01    Appointment of Administrative Agent..............  80
     Section 7.02    Limitation of Duties of Administrative Agent and 
                      the Administrative Agent For Combined Lenders...  81
     Section 7.03    Lack of Reliance on the Administrative Agent, the 
                      Administrative Agent For Combined Lenders and 
                      the Documentation Agent.........................  81
     Section 7.04    Certain Rights of the Administrative Agent.......  81
     Section 7.05    Reliance by Administrative Agent.................  82
     Section 7.06    INDEMNIFICATION OF ADMINISTRATIVE AGENT, 
                      ADMINISTRATIVE AGENT FOR COMBINED LENDERS AND
                      DOCUMENTATION AGENT.............................  82
     Section 7.07    The Administrative Agent, the Administrative 
                      Agent For Combined Lenders and Documentation 
                      Agent in their Individual Capacity..............  82
     Section 7.08    May Treat Lender as Owner........................  83
     Section 7.09    Successor Administrative Agent or Administrative 
                      Agent For Combined Lenders......................  83
     Section 7.10    Documentation Agent..............................  84
     Section 7.11    The Administrative Agent For Combined Lenders....  84

                                       iv
<PAGE>
 
                                 ARTICLE VIII
                                 MISCELLANEOUS

     Section 8.01    Notices...............................................  84
     Section 8.02    Amendments and Waivers................................  84
     Section 8.03    No Waiver; Remedies Cumulative........................  85
     Section 8.04    Payment of Expenses, Indemnities, etc.................  86
     Section 8.05    Right of Setoff.......................................  88
     Section 8.06    Benefit of Agreement..................................  88
     Section 8.07    Successors and Assigns; Participations and Assignments  88
     Section 8.08    Governing Law; Submission to Jurisdiction; Etc........  91
     Section 8.09    Independent Nature of Lenders' Rights.................  92
     Section 8.10    Invalidity............................................  92
     Section 8.11    Renewal, Extension or Rearrangement...................  92
     Section 8.12    Interest..............................................  92
     Section 8.13    Confidential Information..............................  93
     Section 8.14    ENTIRE AGREEMENT......................................  94
     Section 8.15    Attachments...........................................  94
     Section 8.16    Counterparts..........................................  94
     Section 8.17    Survival of Indemnities...............................  94
     Section 8.18    Headings Descriptive..................................  94
     Section 8.19    Satisfaction Requirement..............................  94
     Section 8.20    Exculpation Provisions................................  95
     Section 8.21    Secured Affiliate.....................................  95
     Section 8.22    Intercreditor Agreement...............................  95
     Section 8.23    Merger of Credit Agreement............................  96
 


ANNEXES

Annex I - Commitments

                                       v
<PAGE>
 
SCHEDULES

Schedule 4.07 -  Investments and Guaranties
Schedule 4.08 -  Litigation
Schedule 4.12 -  Titles
Schedule 4.13 -  Defaults
Schedule 4.19 -  Subsidiaries/Guarantors
Schedule 4.23 -  Material Contracts
Schedule 4.24 -  Employment Contracts
Schedule 5.04(a) - Existing Indebtedness
Schedule 5.04(b) - Liens


EXHIBITS

Exhibit A   - Form of Tranche A Term Note
Exhibit B   - Form of Tranche B Term Note
Exhibit C   - Description of Terms, Limitations, Rights and Preferences of
              Preferred Stock
Exhibit D-1 - Form of Opinion of Andrews & Kurth, L.L.P. counsel to the Company
Exhibit D-2 - Form of Opinion of Canadian counsel to the Company
Exhibit D-3 - Form of Opinion of Georgia counsel to the Company
Exhibit D-4 - Form of Opinion of Florida counsel to the Company
Exhibit E-1 - Form of Security Agreement of Sterling Fibers
Exhibit E-2 - Form of Santa Rosa Deed of Trust
Exhibit E-3 - Form of Limited Guaranty Agreement (Santa Rosa)
Exhibit E-4 - Form of Collateral Assignment (Intercompany Loans and Accounts) by
              Sterling Fibers
Exhibit E-5 - Form of Second Lien Deed of Trust
Exhibit F   - Form of Assignment and Acceptance
Exhibit G   - Form of Intercreditor Agreement
Exhibit H   - Form of U.S. Tax Compliance Certificate
Exhibit I   - Form of Notice of Designated Retained Cash Flow Usage

                                       vi
<PAGE>
 
                                 CREDIT AGREEMENT

     THIS CREDIT AGREEMENT is made and entered into as of this 31st day of
January, 1997, among STERLING CHEMICALS, INC., a Delaware corporation (the
"Company"), TEXAS COMMERCE BANK NATIONAL ASSOCIATION, individually, as a Lender
and as Administrative Agent, CREDIT SUISSE FIRST BOSTON, individually, as a
Lender and as Documentation Agent and each of the lenders that is a signatory
hereto or which becomes a party hereto as provided in Section 8.07
(individually, a "Lender" and, collectively, the "Lenders").


                                 INTRODUCTORY STATEMENT

     Sterling Fibers, Inc., a Delaware corporation ("Sterling Fibers"), a
wholly-owned subsidiary of the Company, desires to acquire the acrylic fibers
business (the "AFB Acquisition") from Cytec Acrylic Fibers Inc., a Delaware
corporation, ("Cytec Fibers"), Cytec Industries Inc., a Delaware corporation
("Cytec Industries"), and Cytec Technology Corp., a Delaware corporation ("Cytec
Technology" and together with Cytec Industries and Cytec Fibers, the "Cytec
Parties") pursuant to an Asset Purchase Agreement (the "Purchase Agreement")
dated as of December 23, 1996 among Sterling Fibers, the Company, Sterling
Chemicals Holdings, Inc., a Delaware corporation ("Holdco") and the Cytec
Parties.

     It is contemplated that the total amount of the financing for the AFB
Acquisition will consist of approximately (a) $10,000,000 of new common equity
of Holdco (of which up to $300,000 may be in the form of notes (the "Equity
Notes") from former employees of the Cytec Parties), (b) 100,000 shares of
Preferred Stock (as hereinafter defined) issued to Cytec Industries, and (c) up
to $81,000,000 of senior secured debt issued pursuant to this Agreement, as
described below.

     The Lenders have agreed to provide senior secured debt in the amount of up
to $81,000,000 consisting of up to $31,000,000 of Tranche A Term Loans and up to
$50,000,000 of Tranche B Term Loans, subject to the terms and conditions of this
Agreement.  The proceeds of the Tranche A Term Loans and the Tranche B Term
Loans will be used solely to finance a portion of the AFB Acquisition, to
finance  fees and expenses relating to the AFB Acquisition, and up to $1,000,000
will be used to fund the Secondary ESOP Loan.

     The Original Lenders (as defined below) have provided senior secured credit
facilities to the Company pursuant to the Original Credit Agreement (as defined
below) in the aggregate principal amount of $456,500,000.  The Original Lenders
and the Lenders have agreed to share pro rata in proceeds of Collateral  (as
defined below) and in certain other payments and prepayments and, in furtherance
thereof, have entered into the Intercreditor Agreement (as defined below).
<PAGE>
 
                                 AGREEMENT

     In consideration of the mutual covenants and agreements herein contained,
the Company, the Agents and the Lenders agree as follows:


                                 ARTICLE I

                           DEFINITIONS; CONSTRUCTION

     Section 1.01 Definitions. As used herein, the following terms shall have
the meanings herein specified (to be equally applicable to both the singular and
plural forms of the terms defined). Reference to any party to a Financing
Document means that party and its successors and assigns.

          "Administrative Agent" shall mean Texas Commerce Bank National
     Association, acting in the manner and to the extent described in Article
     VII.

          "Administrative Agent For Combined Lenders" shall mean the
     "Administrative Agent" under the Original Credit Agreement acting on behalf
     of both the Lenders, the Original Lenders, the Documentation Agent (as
     defined in the Original Credit Agreement), the Issuing Banks (as defined in
     the Original Credit Agreement), and the Documentation Agent.

          "Advance Notice" shall mean written or telecopy notice (with
     telephonic confirmation in the case of telecopy notice), which in each case
     shall be irrevocable, from the Company to be received by the Administrative
     Agent before 11:00 a.m. (Houston time), by the number of Business Days in
     advance of any Borrowing, conversion, continuation or prepayment of any
     Loan or Loans pursuant to this Agreement as respectively indicated below:

          (a) Eurodollar Loans  - 3 Business Days; and

          (b) Base Rate Loans  - Same  Business Day.

     For the purpose of determining the respectively applicable Loans in the
     case of the conversion from one Type of Loan into another, the Loans into
     which there is to be a conversion shall control.  The Administrative Agent
     and each Lender are entitled to rely upon and act upon telecopy notice made
     or purportedly made by the Company, and the Company hereby waives the right
     to dispute the authenticity and validity of any such transaction once the
     Administrative Agent or any Lender has advanced funds, absent manifest
     error.

          "AFB Acquisition" shall have the meaning provided in the Introductory
     Statement.

          "AFB Adjusted Historical EBITDA" shall mean (i) for the Rolling Period
     ending March 31, 1997, $15,000,000, (ii) for the Rolling Period ending June
     30, 1997, $10,200,000, (iii) for the 

                                       2
<PAGE>
 
     Rolling Period ending September 30, 1997, $3,900,000, and (iv) for the
     Rolling Period ending December 31, 1997, $1,000,000.

          "AFB Earnout Agreement" shall mean the earnout agreement dated as of
     December 23, 1996 among Sterling Fibers, Holdco, and Cytec Industries in
     the form attached as Exhibit C to the Purchase Agreement.

          "AFB Pilko Report" shall mean the Environmental, Health & Safety
     Review dated November 13, 1996 relating to Cytec Industries, Inc., Santa
     Rosa Plant--Pace, Florida, prepared by Pilko & Associates, Inc., and the
     Investigation of Environmental Impacts dated January 17, 1997 relating to
     Cytec Industries' Acrylic Fiber Manufacturing Facility, Santa Rosa County,
     Florida, prepared by Pilko & Associates, Inc., each of which has been
     delivered to the Lenders.

          "Affiliate" shall mean any Person controlling, controlled by or under
     common control with any other Person.  For purposes of this definition,
     "control" (including "controlled by" and "under common control with") means
     the possession, directly or indirectly, of the power to either (a) vote 10%
     or more of the securities having ordinary voting power for election of
     directors of such Person or (b) direct or cause the direction of the
     management and policies of such Person, whether through the ownership of
     voting securities or otherwise.  Notwithstanding the foregoing, no
     individual shall be deemed to be an Affiliate of a corporation solely by
     reason of his or her being an officer or director of such corporation.

          "Agents" shall  mean, collectively, the Administrative Agent, the
     Administrative Agent For Combined Lenders and the Documentation Agent.

          "Agreement" shall mean this Credit Agreement, as amended, supplemented
     or modified from time to time.

          "Albright" shall mean Albright and Wilson U.K., Ltd., a corporation
     incorporated under the laws of England and Wales.

          "Albright Indemnity" shall mean the indemnification obligations of
     Albright in favor of Sterling Canada and Sterling Pulp as set forth in the
     Purchase Agreement dated as of August 20, 1992, between Sterling Canada,
     Sterling Pulp, and Tenneco Canada, Inc., as amended pursuant to an Amending
     Agreement dated January 24, 1996, which obligations were assigned by
     Tenneco Canada, Inc. to, and assumed by, Albright pursuant to an Assignment
     and Consent Agreement dated as of May 30, 1996.

          "Applicable Lender" shall mean, with respect to any Borrowing of
     Tranche A Term Loans, each Tranche A Term Loan Lender and with respect to
     any Borrowing of Tranche B Term Loans, each Tranche B Term Loan Lender.

                                       3
<PAGE>
 
          "Applicable Margin" shall mean, on any day and with respect to any (a)
     Tranche B Term Loan, for Base Rate Loans, 2.00% per annum and for
     Eurodollar Loans, 3.00% per annum, and (b) Tranche A Term Loan, the
     applicable per annum percentage set forth at the appropriate intersection
     in the table shown below, based on the Leverage Ratio for the Rolling
     Period ending on the most recent Quarterly Date with respect to which the
     Company is required to deliver the Current Information (said calculation to
     be made by the Administrative Agent as soon as practicable after receipt by
     the Administrative Agent of all required Current Information for the
     applicable period); provided that, for purposes of this definition,
     "Rolling Period" shall mean (a) for the second full Fiscal Quarter after
     the Effective Date, such quarter and the preceding Fiscal Quarter, (b) for
     the third full Fiscal Quarter after the Effective Date, such quarter and
     the two preceding Fiscal Quarters (in the case of each of clauses (a) and
     (b) determined on an annualized basis) and (c) for each Fiscal Quarter
     thereafter, such quarter and the three preceding Fiscal Quarters:

<TABLE>
<CAPTION>
 
 
    LEVERAGE RATIO                      EURODOLLAR LOAN APPLICABLE      BASE RATE LOAN APPLICABLE                   
                                            MARGIN PERCENTAGE                MARGIN PERCENTAGE 
   ----------------                     --------------------------      -------------------------- 
<S>                                               <C>                             <C>
Greater than or equal to 4.00                     2.50%                           1.50%
                                                                                 
Greater than or equal to 3.75 but                                                
 less than 4.00                                   2.25%                           1.25%
Greater than or equal to 3.50 but                                                
 less than 3.75                                   2.00%                           1.00%
Greater than or equal to 3.25 but                                                
 less than 3.50                                   1.75%                            .75%
Greater than or equal to 3.00 but                                                
 less than 3.25                                   1.50%                            .50%
Greater than or equal to 2.75 but                                                
 less than 3.00                                   1.25%                            .25%
Less than 2.75                                    1.00%                              0%
</TABLE>

     Each change in the Applicable Margin based on a change in the Current
     Information (or the Company's failure to deliver the Current Information)
     shall be effective as of the first day of the third month of each
     applicable Fiscal Quarter (but based upon Current Information for the
     immediately preceding Rolling Period), or if such day is not a Business
     Day, then the first Business Day thereafter.  Notwithstanding the
     foregoing, (a) for the period from the Effective Date through June 1, 1997,
     the initial Eurodollar Loan Applicable Margin for the Tranche A Term Loans
     will be 2.50% and the initial Base Rate Loan Applicable Margin for the
     Tranche A Term Loans will be 1.50% and (b) if at any time the Company fails
     to deliver Current Information on or before the date required pursuant to
     Section 5.02 (without regard to grace periods), the Eurodollar Loan
     Applicable Margin for the Tranche A Term Loans will be 2.50% and the Base
     Rate Loan Applicable Margin for the Tranche A 

                                       4
<PAGE>
 
     Term Loans will be 1.50% from the date such Current Information is due
     pursuant to Section 5.02 (without regard to grace periods) through the date
     the Administrative Agent receives all Current Information then due pursuant
     to Section 5.02.

          "Applicable Percentage" shall mean, with respect to any Tranche A Term
     Loan Lender, such Lender's Tranche A Term Loan Percentage and with respect
     to any Tranche B Term Loan Lender, such Lender's Tranche B Term Loan
     Percentage.

          "Assignment and Acceptance" shall have the meaning provided in Section
     8.07(c).

          "Bankruptcy Code" shall have the meaning provided in Section 6.08.

          "Base CD Rate" shall mean the sum of (a) the product of (i) the Three-
     Month Secondary CD Rate and (ii) a fraction, whose numerator is one and
     whose denominator is one minus the C\D Reserve Percentage and (b) the C\D
     Assessment Rate.

          "Base Rate" shall have the meaning provided in Section 2.06(a).

          "Base Rate Loan" shall mean a Tranche A Term Loan or a Tranche B Term
     Loan bearing interest at the rate provided in Section 2.06(a).

          "Borrowing" shall mean a borrowing pursuant to a Borrowing Request or
     a continuation or a conversion pursuant to Section 2.11 consisting, in each
     case, of the same Type of Loans having, in the case of Eurodollar Loans,
     the same Interest Period (except as otherwise provided in Sections 2.14 and
     2.15) and made previously or being made concurrently, with respect to
     Tranche A Term Loans, by all of the Tranche A Term Loan Lenders and with
     respect to Tranche B Term Loans, by all of the Tranche B Term Loan Lenders.

          "Borrowing Request" shall mean a written request for a Borrowing
     pursuant to Section 2.02.

          "BP Facility Fee" shall mean the periodic fee payable to the Company
     by BP Chemicals, Inc., an Ohio corporation pursuant to Section 3.1(c) of
     that certain Lease and Production Agreement between BP Chemicals, Inc. and
     the Company dated August 8, 1994.

          "Business Day" shall mean any day excluding Saturday, Sunday and any
     other day on which banks are required or authorized to close in New York,
     New York or Houston, Texas and, if the applicable Business Day relates to
     Eurodollar Loans, on which trading is carried on by and between banks in
     Dollar deposits in the applicable interbank Eurodollar market.

          "Canadian Facility" shall mean a revolving loan and letter of credit
     facility for loans and letters of credit in Canadian or U.S. dollars to or
     for the account of Sterling Pulp.

          "Canadian Subsidiaries" shall mean any Subsidiary of the Company which
     is organized under the laws of Canada or any province thereof.

                                       5
<PAGE>
 
          "Capital Expenditures" shall mean, for any period, all expenditures
     (whether paid in cash or accrued as a liability, including the portion of
     Capital Lease Obligations originally incurred during such period that are
     capitalized for the consolidated balance sheet of the Company) by the
     Company and its Subsidiaries during such period, that, in conformity with
     GAAP, are included in "capital expenditures," "additions to property, plant
     or equipment" or comparable items in the consolidated financial statements
     of the Company, but excluding (a) increases in the consolidated fixed or
     capital assets of the Company and its Subsidiaries resulting solely from
     Permitted Acquisitions (other than expenditures made after the date of any
     such Permitted Acquisition), (b) expenditures for the restoration, repair
     or replacement of any fixed or capital asset that was destroyed or damaged,
     in whole or in part, in an amount equal to any insurance proceeds received
     in connection with such destruction or damage, (c) increases in the capital
     assets of the Company or its Subsidiaries resulting from expenditures in
     respect of fixed or capital assets made by a Person other than the Company
     or its Subsidiaries so long as they have no obligation to reimburse such
     other Person for such expenditures and (d) expenditures made to acquire the
     Properties in connection with the AFB Acquisition.

          "Capital Expenditures from Retained Cash Flow" shall mean Capital
     Expenditures of the Company and its Subsidiaries on a consolidated basis
     permitted for any Fiscal Year pursuant to Section 5.04(o)(iii).

          "Capital Lease Obligations" shall mean, as to any Person, the
     obligations of such Person to pay rent or other amounts under a lease of
     (or other agreement conveying the right to use) real and/or personal
     property (excluding the Valdosta Lease but only to the extent that the
     Company or any Subsidiary owns Valdosta Bonds) which obligations are
     required to be classified and accounted for as a liability for a capital
     lease on a balance sheet of such Person and, for purposes of this
     Agreement, the amount of such obligations shall be the capitalized amount
     thereof.

          "Carry-Forward Capital Expenditures" shall mean Capital Expenditures
     of the Company and its Subsidiaries on a consolidated basis permitted for
     any Fiscal Year pursuant to Section 5.04(o)(ii).

          "C\D Assessment Rate" shall mean for any day as applied to any Base
     Rate Loan, the annual assessment rate determined by the Administrative
     Agent to be payable on such day to the Federal Deposit Insurance
     Corporation (the "FDIC") for the FDIC (or any successor thereto) to insure
     time deposits at offices of the Administrative Agent in the United States.

          "C\D Reserve Percentage" shall mean for any day as applied to any Base
     Rate Loan, that percentage (expressed as a decimal) that is in effect on
     such day, as prescribed by the Board of Governors of the Federal Reserve
     System (or any successor) for determining the then current reserve
     requirement for the Administrative Agent in respect of new non-personal
     time deposits in Dollars having a maturity of 30 days or more.

          "Change of Control" shall mean either a "Change in Control", as
     defined in the Senior Subordinated Notes Indenture or a change resulting
     when any Unrelated Person or any Unrelated Persons, other than the
     Designated Shareholders, acting together, which would constitute a Group

                                       6
<PAGE>
 
     together with any Affiliates or Related Persons thereof (in each case also
     constituting Unrelated Persons) shall at any time either (i) Beneficially
     Own more than 30% of the aggregate voting power of all classes of Voting
     Stock of Holdco or (ii) succeed in having sufficient of its or their
     nominees elected to the Board of Directors of Holdco such that such
     nominees, when added to any existing director remaining on the Board of
     Directors of Holdco after such election who is an Affiliate or Related
     Person of such Person or Group, shall constitute a majority of the Board of
     Directors of Holdco; provided, however, no Change of Control shall have
     occurred so long as the Designated Shareholders (or any combination
     thereof) shall retain more than 50% of the aggregate voting power of all
     classes of Voting Stock of Holdco.  As used herein (a) "Beneficially Own"
     shall mean "beneficially own" as defined in Rule 13d-3 of the Securities
     Exchange Act of 1934, as amended, or any successor provision thereto;
     provided, however, that, for purposes of this definition, a Person shall
     not be deemed to Beneficially Own securities tendered pursuant to a tender
     or exchange offer made by or on behalf of such Person or any of such
     Person's Affiliates until such tendered securities are accepted for
     purchase or exchange; (b) "Group" shall mean a "group" for purposes of
     Section 13(d) of the Securities Exchange Act of 1934, as amended; (c)
     "Unrelated Person" shall mean at any time any Person other than Holdco or
     any of its Subsidiaries and other than any trust for any employee benefit
     plan of Holdco or any of its Subsidiaries; (d) "Related Person" of any
     Person shall mean any other Person owning (1) 5% or more of the outstanding
     common stock of such Person or (2) 5% or more of the Voting Stock of such
     Person; and (e) "Designated Shareholders" shall mean the Persons  who are,
     as of the Effective Date, parties to the shareholder agreement among
     certain shareholders of Holdco, delivered to the Administrative Agent on
     the Effective Date.

          "Closing Date" shall mean the "as of" date of this Agreement set forth
     in the first paragraph hereof.

          "Code" shall mean the Internal Revenue Code of 1986, as amended, and
     any successor statute.

          "Collateral" shall mean the Company's, Holdco's and the Subsidiary
     Guarantors' Properties described in and subject to the Liens, privileges,
     priorities and security interests purported to be created by any Security
     Instrument.

          "Combined Lender Indebtedness" shall mean collectively the Lender
     Indebtedness and the Original Lender Indebtedness.

          "Combined Loans" shall mean the Loans and the Original Loans.

          "Combined Term Loans" shall mean collectively the Loans and the
     Original Term Loans.

          "Commitments" shall mean as to any Lender, its Tranche A Term Loan
     Commitment and Tranche B Term Loan Commitment.

          "Commodity Swap Agreement" shall mean any contract for sale for future
     delivery of commodities (whether or not the subject commodities are to be
     delivered), hedging contract, forward contract, swap agreement, futures
     contract or other commodity pricing protection agreement or option 

                                       7
<PAGE>
 
     with respect to any such transaction, designed to hedge against
     fluctuations in prices of the subject commodities.

          "Company" shall mean Sterling Chemicals, Inc., a Delaware corporation,
     (formerly known as STX Chemicals Corp.).

          "Cumulative Retained Cash Flow" shall mean an amount equal to the
     difference of (a) Retained Cash Flow for all then previous Fiscal Years, on
     a cumulative basis, minus  (b) Designated Retained Cash Flow Usage, on a
     cumulative basis, in each case from the Effective Date through the date of
     determination.

          "Current Assets" shall mean all assets of a Person which under GAAP
     would be classified as current assets (excluding any cash or cash
     equivalents).

          "Current Information" shall mean, as of any day, the financial
     statements and other related information for any applicable period most
     recently required to be delivered to the Administrative Agent pursuant to
     Sections 5.02(a), (b), and (d).

          "Current Liabilities" shall mean all liabilities of a Person which
     under GAAP would be classified as current liabilities, other than current
     maturities of long term debt and the obligation to repay the Revolving
     Credit Loans (as defined in the Original Credit Agreement).

          "Current Ratio" shall mean, on any day, the ratio of Current Assets to
     Current Liabilities.

          "Cytec Indemnity" shall mean the indemnification obligations of the
     Cytec Parties in favor of the Company, Sterling Fibers and Holdco as set
     forth in the Purchase Agreement.

          "Deed of Trust" shall mean the Mortgage, Deed of Trust, Assignment,
     Security Agreement and Financing Statement dated as of August 21, 1996,
     delivered by the Company pursuant to the Original Credit Agreement as
     security for the payment and performance of the Original Lender
     Indebtedness.

          "Default" shall mean an Event of Default or any condition or event
     which, with notice or lapse of time or both, would constitute an Event of
     Default.

          "Designated Retained Cash Flow Usage" shall be an amount designated in
     writing by a Responsible Officer of the Company to the Administrative
     Agent, which designation shall be in the form of  Exhibit I, to be a usage
     of Retained Cash Flow for either a Permitted Acquisition or a Capital
     Expenditure.

          "Documentation Agent" shall mean Credit Suisse First Boston, acting in
     the manner and to the extent described in Article VII.

          "Dollar" and the sign "$" shall mean lawful money of the United States
     of America.

                                       8
<PAGE>
 
          "EBITDA" shall mean, as to the Company and its Subsidiaries on a
     consolidated basis and for any period, without duplication, the amount
     equal to net income less any non-cash income included in net income, plus
     (a) to the extent deducted from net income, interest expense, depreciation,
     depletion and impairment, amortization of leasehold and intangibles,
     expenses incurred on or prior to the Effective Date relating to SAR's, non-
     capitalized expenses incurred on or prior to August 21, 1996 relating to
     the Merger not to exceed $3,633,000, other non-cash expenses, and income
     tax expenses, (b) prepaid royalty income (including the BP Facility Fee) to
     the extent actually received in cash; provided, that, extraordinary gains
     or losses, including but not limited to gains or losses on the disposition
     of assets, shall not be included in EBITDA, in each case for such period,
     and (c) for the Rolling Periods ending on March 31, 1997, June 30, 1997,
     September 30, 1997, and December 31, 1997, the AFB Adjusted Historical
     EBITDA for such Rolling Period.

          "Effective Date" shall mean the date on which (i) each of the
     conditions precedent set forth in Article III have been satisfied or waived
     by each of the Lenders and (ii) the Loans have been made.

          "Environmental Laws" shall mean any and all laws, statutes,
     ordinances, rules, regulations, orders, or determinations of any
     Governmental Authority pertaining to health or the environment in effect in
     any and all jurisdictions in which the Company or its Subsidiaries are
     conducting or at any time have conducted business, or where any Property of
     the Company or its Subsidiaries is located, or where any hazardous
     substances generated by or disposed of by the Company or its Subsidiaries
     are located, including but not limited to the Oil Pollution Act of 1990
     ("OPA"), the Clean Air Act, as amended, the Comprehensive Environmental,
     Response, Compensation, and Liability Act of 1980 ("CERCLA"), as amended,
     the Federal Water Pollution Control Act, as amended, the Occupational
     Safety and Health Act of 1970, as amended, the Resource Conservation and
     Recovery Act of 1976 ("RCRA"), as amended, the Safe Drinking Water Act, as
     amended, the Toxic Substances Control Act, as amended, the Superfund
     Amendments and Reauthorization Act of 1986, as amended, and other
     environmental conservation or protection laws.  The term "oil" shall have
     the meaning specified in OPA; the terms "hazardous substance," "release"
     and "threatened release" have the meanings specified in CERCLA, and the
     terms "solid waste" and "disposal" (or "disposed") have the meanings
     specified in RCRA; provided, however, in the event either CERCLA or RCRA is
     amended so as to change the meaning of any term defined thereby, such
     changed meaning shall apply subsequent to the effective date of such
     amendment, and provided, further, that, to the extent the laws of the state
     in which any Property of the Company or its Subsidiaries is located
     establish a meaning for "oil," "hazardous substance," "release," "solid
     waste" or "disposal" which is broader than that specified in either OPA,
     CERCLA or RCRA, such broader meaning shall apply.

          "Equity Plans" shall have the meaning provided in the Original Credit
     Agreement.

          "ERISA" shall mean the Employee Retirement Income Security Act of
     1974, as amended, and any successor statute.

          "ERISA Affiliate" shall mean each trade or business (whether or not
     incorporated) which together with the Company or a Subsidiary of the
     Company would be deemed to be a "single 

                                       9
<PAGE>
 
     employer" within the meaning of Section 4001(b)(1) of ERISA or Subsections
     414(b), (c), (m) or (o) of the Code.

          "ERISA Termination Event" shall mean (i) a "Reportable Event"
     described in Section 4043 of ERISA and the regulations issued thereunder
     (other than a "Reportable Event" not subject to the provision for 30-day
     notice to the PBGC under Subsections .14, .18, .19 or .20 of Part 2615 of
     the PBGC regulations), (ii) the withdrawal of the Company, a Subsidiary of
     the Company or any ERISA Affiliate from a Plan during a plan year in which
     it was a "substantial employer" as defined in Section 4001(a)(2) of ERISA,
     (iii) the filing of a notice of intent to terminate a Plan or the treatment
     of a Plan amendment as a termination under Section 4041(c) of ERISA, (iv)
     the institution of proceedings to terminate a Plan by the PBGC, or (v) any
     other event or condition which could reasonably be expected to constitute
     grounds under Section 4042 of ERISA for the termination of, or the
     appointment of a trustee to administer, any Plan.

          "ESOP" shall mean the new employee stock ownership plan of the Company
     and its related trust, as in effect on the Effective Date.

          "ESOP Security Agreement" shall mean that certain Security Agreement
     dated as of the Effective Date, executed by the ESOP in favor of the
     Company, and any and all amendments, modifications, supplements, renewals
     and restatements thereof.

          "ESOP Term Loan" shall have the meaning provided in the Original
     Credit Agreement.

          "Eurodollar Loan" shall mean a Tranche A Term Loan or a Tranche B Term
     Loan bearing interest at the rate provided in Subsection 2.06(b).

          "Eurodollar Rate" shall mean, with respect to any Borrowing of
     Eurodollar Loans for any Interest Period, the product of (a) (i) the
     interest rate per annum shown on page 3750 of the Dow Jones & Company
     Telerate screen or any successor page as the composite offered rate for
     London interbank deposits with a period comparable to the Interest Period
     for such Eurodollar Loan, as shown under the  heading "USD" at 11:00 A.M.
     (London time) two Business Days prior to the first day of such Interest
     Period or (ii) if the rate in clause (i) of this definition is not shown
     for any particular day, the average  interest rate per annum (rounded
     upwards, if necessary, to the next 1/16th of 1%) offered to the Reference
     Banks in the interbank Eurodollar market for Dollar deposits of amounts in
     funds comparable to the principal amount of the Eurodollar Loan to which
     such Eurodollar Rate is to be applicable with maturities comparable to the
     Interest Period for which such Eurodollar Rate will apply as of
     approximately 10:00 a.m. (Houston time) two Business Days prior to the
     commencement of such Interest Period, times (b) Statutory Reserves.

          "Event of Default" shall have the meaning provided in Article VI.

          "Excess Cash Flow" shall mean (a) EBITDA for any Fiscal Year, minus
     (b) for each such Fiscal Year and for the Company and its Subsidiaries on a
     consolidated basis, the sum of (i) scheduled payments of principal pursuant
     to Sections 2.05(a) and (b) and Sections 2.05(b) and (c) 

                                       10
<PAGE>
 
     of the Original Credit Agreement, (ii) the principal portion of scheduled
     payments under Capital Lease Obligations, (iii) cash interest, (iv) cash
     taxes applicable to such Fiscal Year and paid prior to the date of
     determination, by or on behalf of the Company and its Subsidiaries, (v) any
     Permitted Holdco Dividends actually paid, (vi) the amount paid to Cytec
     pursuant to Section 2.03 of the AFB Earnout Agreement attributable to such
     Fiscal Year, (vii) for the Fiscal Year ending September 30, 1997, the AFB
     Adjusted Historical EBITDA for the Rolling Period ending on September 30,
     1997, and (viii) the amount equal to (A) actual Capital Expenditures
     (exclusive of Capital Lease Obligations incurred during such Fiscal Year
     and Capital Expenditures for such Fiscal Year that were designated as
     Capital Expenditures from Retained Cash Flow), plus (B) the amount of 
     Carry-Forward Capital Expenditures permitted to be made in the next
     succeeding Fiscal Year, minus (C) the amount of Carry-Forward Capital
     Expenditures permitted to be made in the current Fiscal Year.

          "Exchange Rate Swap Agreement" shall mean any contract for sale,
     purchase, or exchange or for future delivery of foreign currency (whether
     or not the subject currency is to be delivered or  exchanged), hedging
     contract, forward contract, swap agreement, futures contract, or other
     foreign exchange protection agreement or option with respect to any such
     transaction, designed to hedge against fluctuations in foreign exchange
     rates.

          "Federal Funds Effective Rate" shall mean, for any day, the per annum
     rate equal to the weighted average of the rates on overnight Federal funds
     transactions with members of the Federal Reserve System arranged by Federal
     funds brokers, as published for such day (or, if such day is not a Business
     Day, for the next preceding Business Day) by the Federal Reserve Bank of
     New York, or, if such rate is not so published for any day which is a
     Business Day, the average of the quotations for such day on such
     transactions received by the Administrative Agent from three Federal funds
     brokers of recognized standing selected by it.

          "Fee Letter" shall mean the letter agreement dated December 23, 1996,
     regarding fees, executed by TCB, and Chase Securities Inc. and accepted and
     agreed to by the Company as of December 23, 1996.

          "Financial Statements" shall mean the audited consolidated financial
     statements of the Company for the Fiscal Year ended September 30, 1996.

          "Financing Documents" shall mean this Agreement, the Notes, the
     Subsidiary Guaranty, the Security Instruments, the Stock Intercreditor
     Agreement,  the Borrowing Request, the Fee Letter, the Intercreditor
     Agreement and the other documents, instruments or agreements described in
     Subsection 3.02(d), together with any other document, instrument or
     agreement (other than participation, agency or similar agreements among the
     Lenders or between any Lender and any other bank or creditor with respect
     to any indebtedness or obligations of Holdco or the Company or its
     Subsidiaries hereunder or thereunder) now or hereafter entered into in
     connection with the Loans, the Lender Indebtedness or the Collateral, as
     such documents, instruments or agreements may be amended, modified or
     supplemented from time to time.

                                       11
<PAGE>
 
          "Fiscal Quarter" shall mean the fiscal quarter of the Company, ending
     on the last day of each December, March, June and September in each year.

          "Fiscal Year" shall mean the fiscal year of the Company, ending on
     September 30th of each year.

          "Fixed Charge Coverage Ratio" shall mean, for any day:

               (a) from January 1, 1997, through March 31, 1997, the ratio of
          (i) EBITDA for the Rolling Period ending on December 31, 1996 less
          cash income taxes actually paid during the Fiscal Quarter ending on
          December 31, 1996, times four, plus cash income tax refunds actually
          received by the Company and its Subsidiaries on a consolidated basis
          for the Rolling Period ending on December 31, 1996, to (ii) the sum of
          (A) Scheduled Principal Payments made during the Fiscal Quarter ending
          on December 31, 1996, times four, plus (B) the amount of cash interest
          paid during the Fiscal Quarter ending on December 31, 1996 (including
          the interest component of Capital Lease Obligations), times four, plus
          (C) actual Capital Expenditures (excluding Project Capital
          Expenditures and Capital Lease Obligations incurred during such
          period) made during the Rolling Period ending on December 31, 1996,
          plus (D) all Permitted Holdco Dividends paid during the Rolling Period
          ending on December 31, 1996;

               (b) from April 1, 1997, through June 30, 1997, the ratio of  (i)
          EBITDA for the Rolling Period ending on March 31, 1997, less cash
          income taxes actually paid during the two Fiscal Quarters ending on
          December 31, 1996 and March 31, 1997, respectively, times two, plus
          cash income tax refunds actually received by the Company and its
          Subsidiaries on a consolidated basis for the Rolling Period ending on
          March 31, 1997, to (ii) the sum of (A) Scheduled Principal Payments
          made during the two Fiscal Quarters ending on December 31, 1996, and
          March 31, 1997, times two, plus (B) the amount of cash interest paid
          during the two Fiscal Quarters ending on December 31, 1996, and March
          31, 1997 (including the interest component of Capital Lease
          Obligations), respectively,  times two, plus (C) actual Capital
          Expenditures  (excluding Project Capital Expenditures and Capital
          Lease Obligations incurred during such period) made during the Rolling
          Period ending on March 31, 1997, plus (D) all Permitted Holdco
          Dividends paid during the Rolling Period ending on March 31, 1997;

               (c) from July 1, 1997, through September 30, 1997, the ratio of
          (i) EBITDA for the Rolling Period ending on June 30, 1997, less cash
          income taxes actually paid for the three Fiscal Quarters ending on
          December 31, 1996, March 31, 1997 and June 30, 1997, respectively,
          times 1.33, plus cash income tax refunds actually received by the
          Company and its Subsidiaries on a consolidated basis for the Rolling
          Period ending on June 30, 1997, to (ii) the sum of (A) Scheduled
          Principal Payments made during the three Fiscal Quarters ending on
          December 31, 1996, March 31, 1997, June 30, 1997, respectively, times
          1.33, plus (B) the amount of cash interest paid during the three
          Fiscal Quarters ending on December 31, 1996, March 31, 1997, and June
          30, 1997 (including the interest component of Capital Lease

                                       12
<PAGE>
 
          Obligations), respectively, times 1.33, plus (C) actual Capital
          Expenditures  (excluding Project Capital Expenditures and Capital
          Lease Obligations incurred during such period) made during the Rolling
          Period ending on June 30, 1997, plus (D) all Permitted Holdco
          Dividends paid during the Rolling Period ending on June 30, 1997; and

               (d) from October 1, 1997, through December 31, 1997, the  ratio
          of (i) EBITDA less cash income taxes actually paid plus cash income
          tax refunds actually received by the Company and its Subsidiaries on a
          consolidated basis in each case for the Rolling Period ending on
          September 30, 1997, to (ii) the sum of  (A) Scheduled Principal
          Payments made during such period, plus (B) the amount of cash interest
          paid during such period (including the interest component of Capital
          Lease Obligations), plus (C) the greater of (1) actual Capital
          Expenditures (exclusive of Capital Lease Obligations incurred during
          such period, Capital Expenditures made during such period that were
          designated by the Company to be Capital Expenditures from Retained
          Cash Flow, and Project Capital Expenditures made during such period)
          and (2) $15,000,000, plus (D) all Permitted Holdco Dividends paid
          during such period, all without duplication and as to the Company and
          its Subsidiaries on a consolidated basis.

               (e) after December 31, 1997, the ratio of (i) EBITDA less cash
          income taxes actually paid plus cash income tax refunds actually
          received by the Company and its Subsidiaries on a consolidated basis
          to (ii) the Fixed Charges, in each case for the Rolling Period ending
          on the most recent Quarterly Date.

          "Fixed Charges" shall mean without duplication, as to the Company and
     its Subsidiaries on a consolidated basis and for each Rolling Period, (a)
     Scheduled Principal Payments made during such period, plus (b) the amount
     of cash interest paid during such period (including the interest component
     of Capital Lease Obligations), plus (c) the greater of (i) actual Capital
     Expenditures (exclusive of Capital Lease Obligations incurred during such
     period and Capital Expenditures made during such period that were
     designated by the Company to be Capital Expenditures from Retained Cash
     Flow) and (ii) $15,000,000, plus (d) all Permitted Holdco Dividends paid
     during such period.

          "Form 1001 Certification" shall have the meaning provided in Section
     2.20(f).

          "Form 4224 Certification" shall have the meaning provided in Section
     2.20(f).

          "Funded Indebtedness" shall mean, as to any Person, without
     duplication, all Indebtedness for borrowed money, all obligations evidenced
     by bonds, debentures, notes, or other similar instruments, all Capital
     Lease Obligations, and all guaranties of Funded Indebtedness of other
     Persons.

          "GAAP" shall mean generally accepted accounting principles as applied
     in accordance with Section 1.02.

          "Governmental Authority" shall mean any (domestic or foreign) federal,
     state, province, county, city, municipal or other political subdivision or
     government, department, commission, board, 

                                       13
<PAGE>
 
     bureau, court, agency or any other instrumentality of any of them, which
     exercises jurisdiction over the Company or any of its Property, or any
     Subsidiary of the Company or any of such Subsidiary's Property or any Plan.

          "Governmental Requirement" shall mean any law, statute, code,
     ordinance, order, rule, regulation, judgment, decree, injunction,
     franchise, permit, certificate, license, authorization or other direction
     or requirement (including but not limited to any of the foregoing which
     relate to Environmental Laws, energy regulations and occupational, safety
     and health standards or controls) of any Governmental Authority.

          "Hedge Agreement" shall mean (i) any Commodity Swap Agreement, (ii)
     any Interest Rate Swap Agreement, or (iii) any Exchange Rate Swap
     Agreement.

          "Highest Lawful Rate" shall mean, with respect to each Lender, the
     maximum nonusurious interest rate, if any, that at any time or from time to
     time may be contracted for, taken, reserved, charged or received on the
     Notes or on other Lender Indebtedness, as the case may be, owed to it under
     the law of any jurisdiction whose laws may be mandatorily applicable to
     such Lender notwithstanding other provisions of this Agreement, or law of
     the United States of America applicable to such Lender and the
     Transactions, which would permit such Lender to contract for, charge, take,
     reserve or receive a greater amount of interest than under such
     jurisdiction's law.

          "Holdco" shall have the meaning provided in the Introductory
     Statement.

          "Holdco Common Stock" shall mean the common stock of Holdco, par value
     $0.01 per share.

          "Indebtedness" of any Person shall mean:

               (i) all obligations of such Person for borrowed money and
          obligations evidenced by bonds, debentures, notes or other similar
          instruments;

               (ii) all obligations of such Person (whether contingent or
          otherwise) in respect of bankers' acceptances, letters of credit,
          surety or other bonds and similar instruments;

               (iii)  all obligations of such Person to pay the deferred
          purchase price of Property or services (other than for borrowed
          money);

               (iv) all Capital Lease Obligations in respect of which such
          Person is liable, contingently or otherwise, as obligor, guarantor or
          otherwise, or in respect of which obligations such Person otherwise
          assures a creditor against loss;

               (v) all guaranties (direct or indirect), and other contingent
          obligations of such Person in respect of, or obligations to purchase
          or otherwise acquire or to assure payment of, Indebtedness of other
          Persons;

                                       14
<PAGE>
 
               (vi) Indebtedness of others secured by any Lien upon Property
          owned by such Person, whether or not assumed;

               (vii)  all obligations or undertakings of such Person to maintain
          or cause to be maintained the financial position or financial
          covenants of other Persons;

               (viii)  obligations to deliver goods or services in consideration
          of advance payments, excluding such obligations incurred in the
          ordinary course of business as conducted by the Company and its
          Subsidiaries as of the Closing Date; and

               (ix) the net amount of obligations of such Person under
          agreements of the types described in the definitions of Commodity Swap
          Agreements, Exchange Rate Swap Agreements and Interest Rate Swap
          Agreements;

     provided, that the term "Indebtedness" shall not mean or include any
     indebtedness of the type described in clause (i) of this definition in
     respect of which monies sufficient to pay and discharge the same in full
     (either on the expressed date of maturity thereof or on such earlier date
     as such indebtedness may be duly called for redemption and payment) shall
     be deposited (in accordance with the terms of such indebtedness) with a
     depository, agency or trustee, acceptable to the Administrative Agent, in
     trust for the payment of such indebtedness with the effect that the obligor
     of such indebtedness has no further obligation to comply with the covenants
     and other applicable terms of the documentation existing in connection
     therewith.

          "Intercreditor Agreement" shall have the meaning assigned such term in
     Section 8.22.

          "Interest Coverage Ratio" shall mean, on any day, the ratio of (a)
     EBITDA for the Rolling Period ending on the then most recent Quarterly Date
     to (b) cash interest payments made by the Company and its Subsidiaries on a
     consolidated basis during such Rolling Period.

          "Interest Period" shall mean, with respect to each Borrowing of
     Eurodollar Loans, an interest period complying with the terms and
     provisions of Section 2.07.

          "Interest Rate Swap Agreement" shall mean any rate swap, rate cap,
     rate floor, rate collar, forward rate agreement, futures or other rate
     protection agreement or option with respect to any such transaction,
     designed to hedge against fluctuations in interest rates.

          "Leasehold Deed of Trust" shall mean the Leasehold Deed to Secure Debt
     and Security Agreement dated as of August 21, 1996, as amended by the First
     Amendment and Supplement to Leasehold Deed to Secure Debt and Security
     Agreement delivered by the Company pursuant to Section 3.02(d)(xiv) as
     security for the Combined Lender Indebtedness.

          "Lender" shall have the meaning assigned such term in the opening
     paragraph of this Agreement.

                                       15
<PAGE>
 
          "Lender Indebtedness" shall mean any and all amounts owing or to be
     owing by the Company to the Agents or the Lenders with respect to or in
     connection with the Loans, the Notes, any Hedge Agreement, this Agreement,
     or any other Financing Document and, as to Hedge Agreements, any and all
     amounts owing or to be owing by the Company thereunder to any Secured
     Affiliate.

          "Lending Office" shall mean for each Lender the office specified
     opposite such Lender's name on the signature pages hereof, or in the
     Assignment and Acceptance pursuant to which it became a Lender, with
     respect to each Type of Loan, or such other office as such Lender may
     designate in writing from time to time to the Company and the
     Administrative Agent with respect to such Type of Loan.

          "Leverage Ratio" shall mean, on any day, the ratio of (a) Funded
     Indebtedness of the Company and its Subsidiaries on a consolidated basis as
     of the date of determination to (b) EBITDA for the Rolling Period ending on
     the most recent Quarterly Date as of the date of determination.

          "Lien" shall mean any interest in Property securing an obligation owed
     to, or a claim by, a Person other than the owner of the Property, whether
     such interest is based on contract or constitutional common law, or
     statutory law, and including but not limited to the lien or security
     interest arising from a mortgage, encumbrance, pledge, security agreement,
     conditional sale or trust receipt or a lease, consignment or bailment for
     security purposes.  The term "Lien" shall include reservations, exceptions,
     encroachments, easements, rights of way, covenants, conditions,
     restrictions, liens and other statutory, constitutional, or common law
     rights of landlords, leases and other title exceptions and encumbrances
     affecting Property.  For the purposes of this Agreement, the Company or any
     Subsidiary of the Company shall be deemed to be the owner of any Property
     which it has acquired or holds subject to a conditional sale agreement,
     financing lease or other arrangement pursuant to which title to the
     Property has been retained by or vested in some other Person for security
     purposes.

          "Loan" shall mean a Tranche A Term Loan or a Tranche B Term Loan, as
     the context shall require; and "Loans" shall mean collectively the Tranche
     A Term Loans and the Tranche B Term Loans or one or more of them as
     provided herein.

          "Margin Stock" shall have the meaning provided in Regulations G, U and
     X.

          "Material Adverse Effect" shall mean any material and adverse effect
     on (i) the business operations, assets, liabilities, condition (financial
     or otherwise), or results of operations of the Company, on an individual
     basis, or the Company and its Subsidiaries taken as a whole, (ii) the
     ability of the Company on an individual basis to carry out its business or
     of the Company and its Subsidiaries taken as a whole to carry out their
     business, or (iii) the ability of the Company and its Subsidiaries, taken
     as a whole, to perform the obligations under the Notes, this Agreement or
     the other Financing Documents in accordance with their respective terms.

          "Material Contract"  shall mean each contract, license, and agreement
     listed on Schedule 4.23.

                                       16
<PAGE>
 
          "Net Proceeds" shall mean, with respect to any sale, transfer, or
     disposition of Property permitted by Section 5.04(c) ("Permitted
     Disposition"), the gross amount received by the Company or any of its
     Subsidiaries from such Permitted Disposition, minus the sum of (i) the
     amount, if any, of all taxes paid or payable by the Company or any of its
     Subsidiaries directly resulting from such Permitted Disposition (including
     the amount, if any, estimated by the Company in good faith at the time of
     such Permitted Disposition for taxes payable by the Company or any of its
     Subsidiaries on or measured by net income or gain resulting from such
     Permitted Disposition), and (ii) the reasonable out-of-pocket costs and
     expenses incurred by the Company or such Subsidiary in connection with such
     Permitted Disposition (including reasonable brokerage fees paid to a Person
     other than an Affiliate of the Company, but excluding any fees or expenses
     paid to an Affiliate of the Company).

          "Notes" shall mean the Tranche A Term Notes and the Tranche B Term
     Notes.

          "Notice of Designated Retained Cash Flow Usage" shall mean a notice in
     the form attached as Exhibit I.

          "Original Credit Agreement" shall mean the $456,500,000 principal
     amount credit agreement dated as of June 21, 1996 among the Company, TCB,
     individually, as an issuing bank and as administrative agent, Credit
     Suisse, individually, as an issuing bank and as documentation agent, and
     the lenders party thereto, as amended by the First Amendment to Credit
     Agreement of even date herewith, and as further amended, modified or
     supplemented.

          "Original Fee Letter" shall mean the "Fee Letter" under the Original
     Credit Agreement.

          "Original Lender Indebtedness" shall mean the "Lender Indebtedness"
     under the Original Credit Agreement.

          "Original Lenders" shall mean the "Lenders" under the Original Credit
     Agreement.

          "Original Loans" shall mean the "Loans" under the Original Credit
     Agreement.

          "Original Pilko Report" shall mean the environmental assessment letter
     of Pilko & Associates, Inc. dated April 18, 1996, and the accompanying
     Environmental Assessment of Sterling Chemicals, Inc. each of which has been
     delivered to the Lenders.

          "Original Term Loan Lenders" shall mean "Term Loan Lenders" under the
     Original Credit Agreement.

          "Original Term Loans" shall mean the "Term Loans" under the Original
     Credit Agreement.

          "Original Tranche A Term Loan Lender" shall mean any "Tranche A Term
     Loan Lender" under the Original Credit Agreement.

                                       17
<PAGE>
 
          "Original Tranche B Term Loan Lender" shall mean any "Tranche B Term
     Loan Lender" under the Original Credit Agreement.

          "Other Taxes" shall have the meaning provided in Subsection 2.20(b).

          "Payment Office" shall mean the Administrative Agent's office located
     at 1111 Fannin Street, Houston, Texas  77002;  Attention:  Gale Manning (or
     such other office or individual as the Administrative Agent may hereafter
     designate in writing to the other parties hereto).

          "PBGC" shall mean the Pension Benefit Guaranty Corporation, or any
     successor thereto.

          "Permitted Acquisition" shall mean any non-hostile acquisition of  the
     voting securities (other than publicly traded securities) or other equity
     interests, or all or substantially all of the assets, of any Person (or any
     division or product line of such person), but only so long as no Default
     shall have occurred and be continuing at the time of (or would result from)
     such acquisition, and only to the extent permitted pursuant to Section
     5.04(e)(x).

          "Permitted Holdco Dividend" shall mean any of the following, to the
     extent permitted pursuant to Section 5.04(d)(iv):

               (a) cash dividends to Holdco in any Fiscal Year not to exceed (A)
          $500,000 for the period from the Effective Date through September 30,
          1996 and (B) $2,000,000 for Fiscal Year ended September 30, 1997, and
          for each succeeding Fiscal Year; and

               (b) cash dividends to Holdco so long as  Holdco promptly, and in
          any event within five Business Days, utilizes the full amount of such
          cash dividends for the sole purpose of paying interest as and when due
          with respect to the Senior Secured Discount Notes then outstanding to
          the extent required to be made in accordance with the terms of the
          Senior Secured Discount Notes as in effect on the Effective Date and
          without giving effect to any amendment or modification thereof unless
          agreed to in writing by the Lenders; provided that (i) the amount of
          such cash dividends paid pursuant to this clause (b) shall not exceed
          the amount necessary to make such required interest payment in
          accordance with the terms of the Senior Secured Discount Notes, (ii)
          no such payment shall be made at any time when the payment of cash
          interest on the Senior Secured Discount Notes is not required to be
          made pursuant to the provisions thereof, and (iii) no such payment
          shall be made at any time prior to the fifth anniversary of the
          Effective Date.

          "Person" shall mean any individual, partnership, firm, corporation
     (including, but not limited to the Company), association, joint venture,
     trust or other entity, or any government or political subdivision or
     agency, department or instrumentality thereof; provided, however, for the
     purpose of the definition of "Change of Control," "Person" shall mean a
     "person" or group of persons within the meaning of Sections 13(d) and 14(d)
     of the Securities Exchange Act of 1934, as amended.

                                       18
<PAGE>
 
          "Plan" shall mean any employee pension benefit plan, as defined in
     Section 3(2) of ERISA (including, but not limited to, an employee pension
     benefit plan, such as a foreign plan, which is not subject to the
     provisions of ERISA), which (i) is currently or hereafter sponsored,
     maintained or contributed to by the Company, a Subsidiary of the Company or
     an ERISA Affiliate, or (ii) was at any time during the six preceding Fiscal
     Years sponsored, maintained or contributed to by the Company, a Subsidiary
     of the Company or an ERISA Affiliate.

          "Preferred Stock" shall mean the redeemable Series A Preferred Stock
     issued by Holdco with terms, limitations, rights and preferences as set
     forth in Exhibit C.

          "Prime Rate" shall mean the rate which the Administrative Agent
     announces from time to time as its prime rate, effective as of the date
     announced as the effective date of any change in such prime rate.  Without
     notice to the Company or any other Person, the Prime Rate shall change
     automatically from time to time as and in the amount by which such prime
     rate shall fluctuate.  The Prime Rate is a reference rate and does not
     necessarily represent the lowest or best rate actually charged to any
     customer.  The Administrative Agent may make commercial loans or other
     loans at rates of interest at, above or below the Prime Rate.

          "Project Capital Expenditures" shall mean all Capital Expenditures
     made by the Company and its Subsidiaries through December 31, 1996, for the
     construction of the Valdosta, Georgia facility and the methanol facility
     located in Texas City, Texas.

          "Property" shall mean any interest in any kind of property or asset,
     whether real, personal or mixed, or tangible or intangible.

          "Purchase Agreement" shall have the meaning provided in the
     Introductory Statement.

          "Quarterly Dates" shall mean the last day of each December, March,
     June, and September, in each year.

          "Reference Banks" shall mean the Agents.

          "Register" shall have the meaning assigned in Section 8.07(d).

          "Regulation D", "Regulations G, U and X" shall mean, respectively,
     Regulation D under the Securities Act of 1933, as amended or modified from
     time to time, and Regulation G, Regulation U and Regulation X of the Board
     of Governors of the Federal Reserve System,  as such regulations are from
     time to time in effect and any successor regulations thereto.

          "Required Lenders" shall mean at any time, Lenders the Total Credit
     Percentages of which aggregate at least 51%.

          "Responsible Officer" shall mean, with respect to any corporation, the
     chairman of the board, the president, any vice president, the chief
     executive officer or the chief operating officer, or any 

                                       19
<PAGE>
 
     equivalent officer (regardless of his or her title), and, in respect of
     financial or accounting matters, the chief financial officer, the vice
     president of finance, the treasurer, the controller, or any equivalent
     officer (regardless of his or her title). Unless otherwise specified, all
     references to a Responsible Officer herein shall mean a Responsible Officer
     of the Company.

          "Retained Cash Flow" shall mean, in any Fiscal Year, the amount of
     Excess Cash Flow that exceeds the amount of the prepayment of Combined
     Loans required pursuant to Section 2.10(a)(i) for such Fiscal Year.

          "Rolling Period" shall mean for each Fiscal Quarter commencing with
     the first full Fiscal Quarter after the Effective Date, such quarter and
     the three preceding Fiscal Quarters.

          "Santa Rosa Deed of Trust" shall mean the Mortgage, Assignment and
     Security Agreement dated as of the Closing Date delivered by Sterling
     Fibers pursuant to Section 3.02(d)(ii) as security for the payment and
     performance of Sterling Fibers' obligations under the Limited Guaranty
     Agreement (Santa Rosa) dated as of the Closing Date delivered by Sterling
     Fibers pursuant to Section 3.02(d)(iii).

          "SAR" shall mean each stock appreciation right outstanding under any
     Equity Plan.

          "Scheduled Capital Expenditures" shall mean Capital Expenditures of
     the Company and its Subsidiaries on a consolidated basis permitted for any
     Fiscal Year pursuant to Section 5.04(o)(i).

          "Scheduled Principal Payments" shall mean, for any period, the amounts
     of scheduled principal payments made during such period with respect to
     Funded Indebtedness (including the principal portion of all Capital Lease
     Obligations) not including any principal payments of (a) the ESOP Term
     Loan, but only to the extent that net income for the applicable period was
     reduced for the expense incurred by the Company for contributions to the
     ESOP, and (b) Revolving Credit Loans (as defined in the Original Credit
     Agreement).

          "SCI Acquisition" shall have the meaning assigned to the term
     "Acquisition" in the Original Credit Agreement.

          "Second Lien Deed of Trust" shall mean the Second Lien Mortgage, Deed
     of Trust, Assignment, Security Agreement and Financing Statement dated as
     of the Closing Date, delivered by the Company pursuant to Section
     3.02(d)(v) as security for the payment and performance of the  Lender
     Indebtedness.

          "Secondary ESOP Loan" shall mean the loan or loans made by the Company
     to the ESOP to allow the ESOP to purchase Holdco Common Stock.

          "Secondary ESOP Loan Documents" shall mean the Secondary ESOP Note,
     the ESOP Security Agreement, and all documents, instruments and agreements
     now or hereafter executed by the 

                                       20
<PAGE>
 
     ESOP and delivered to the Company as the lender under the Secondary ESOP
     Loan, and any and all amendments, modifications, supplements, renewals or
     restatements thereof.

          "Secondary ESOP Note" shall mean the promissory note or notes from the
     ESOP to the Company evidencing the Secondary ESOP Loan, and any and all
     amendments, modifications, supplements, renewals and restatements thereof.

          "Secured Affiliate" shall mean any Affiliate of any Lender that has
     entered into a Hedge Agreement with the Company or any of its Subsidiaries
     with the obligations of the Company or such Subsidiary thereunder being
     secured by one or more Security Instruments.

          "Security Instruments" shall mean the agreements or instruments
     described or referred to in Subsections 3.02(d)(i) through (xviii),
     including, to the extent such Subsections describe an amendment, the
     agreement or instrument amended thereby, and any and all other agreements
     or instruments now or hereafter executed and delivered by the Company, any
     Subsidiary of the Company or any other Person as security for the payment
     or performance of the Lender Indebtedness or the Original Lender
     Indebtedness, as any of the foregoing may have been, or may hereafter be,
     amended, modified or supplemented.

          "Senior Secured Discount Notes" shall mean the senior secured discount
     notes issued pursuant to the Senior Secured Discount Notes Indenture with
     initial proceeds in an amount of up to $100,000,000 issued by Holdco in
     connection with the debt financing for the SCI Acquisition.

          "Senior Secured Discount Notes Indenture" shall mean the Sterling
     Chemicals Holdings, Inc. $191,751,000 132% Senior Secured Discount Notes
     due 2008 Indenture dated as of August 15, 1996, with Fleet National Bank,
     as Trustee.

          "Senior Subordinated Notes" shall mean the senior subordinated notes
     issued pursuant to the Senior Subordinated Notes Indenture in an amount of
     up to $275,000,000 issued by the Company in connection with the debt
     financing for the SCI Acquisition.

          "Senior Subordinated Notes Indenture" shall mean the Sterling
     Chemicals, Inc. $275,000,000 11 3/4% Senior Subordinated Notes Due 2006
     Indenture dated as of August 15, 1996, with Fleet National Bank, as
     Trustee.

          "Solvent" shall mean with respect to any Person on a particular date,
     the condition that, on such date, (a) the fair value of the property of
     such Person is greater than the total amount of liabilities, including,
     without limitation, contingent liabilities, of such Person, (b) the present
     fair salable value of the assets of such Person is not less than the amount
     that will be required to pay the probable liability of such Person on its
     debts as they become absolute and matured, (c) such Person does not intend
     to, and does not believe that it will, incur debts or liabilities beyond
     such Person's ability to pay as such debts and liabilities mature, and (d)
     such Person is not engaged in business or a transaction, and is not about
     to engage in business or a transaction, for which such Person's property
     would constitute an unreasonably small amount of capital.

                                       21
<PAGE>
 
          "Statutory Reserves" shall mean a fraction (expressed as a decimal),
     the numerator of which is the number one and the denominator of which is
     the number one minus the aggregate of the maximum applicable reserve
     percentages, including any marginal, special, emergency or supplemental
     reserves (expressed as a decimal) established by the Board of Governors of
     the Federal Reserve System and any other banking authority to which the
     Lenders are subject for Eurocurrency Liabilities (as defined in Regulation
     D) or any other category of deposits or liabilities by reference to which
     the Eurodollar Rate is determined.  Such reserve percentages shall include
     those imposed pursuant to Regulation D.  Eurodollar Loans shall be deemed
     to constitute Eurocurrency Liabilities and to be subject to such reserve
     requirements without benefit of or credit for proration, exemptions or
     offsets that may be available from time to time to any Lender under such
     Regulation D.  Statutory  Reserves shall be adjusted automatically on and
     as of the effective date of any change in any reserve percentage.

          "Sterling Canada" shall mean Sterling Canada, Inc., a Delaware
     corporation and a wholly-owned Subsidiary of the Company.

          "Sterling NRO" shall mean Sterling NRO, Ltd., an Ontario (Canada)
     corporation.

          "Sterling Pulp" shall mean Sterling Pulp Chemicals, Ltd., an Ontario
     (Canada) corporation and a wholly-owned subsidiary of Sterling Canada.

          "Stock Intercreditor Agreement" shall mean the intercreditor agreement
     between TCB, on behalf of the Original Lenders, and Fleet National Bank of
     Connecticut, as Trustee on behalf of the holders of the Senior Secured
     Discount Notes, and dated as of August 21, 1996.

          "Subrogation and Contribution Agreement" shall mean the Subrogation
     and Contribution Agreement dated as of August 21, 1996 among the Subsidiary
     Guarantors as amended, modified and supplemented.

          "Subsidiary" of any Person shall mean a corporation, limited liability
     company,  partnership or other entity of which a majority of the
     outstanding shares of stock of each class having ordinary voting power or
     other equity interests is owned by such Person, by one or more Subsidiaries
     of such Person, or by such Person and one or more of its Subsidiaries.

          "Subsidiary Guaranty" shall mean, collectively, (i) the Guaranty
     Agreement dated as of the Closing Date executed by the Subsidiary
     Guarantors in favor of the Original Administrative Agent, the
     Administrative Agent, the Documentation Agent, the Documentation Agent (as
     defined in the Original Credit Agreement), the Issuing Banks (as defined in
     the Original Credit Agreement), and the Combined Lenders and (ii) the
     Limited Guaranty Agreement (Santa Rosa) dated as of the Closing Date
     executed by Sterling Fibers in favor of the Original Administrative Agent,
     the Administrative Agent, the Documentation Agent, the Documentation Agent
     (as defined in the Original Credit Agreement),  the Issuing Banks (as
     defined in the Original Credit Agreement), and the Combined Lenders.

                                       22
<PAGE>
 
          "Subsidiary Guarantors" shall mean those Subsidiaries designated as
     Subsidiary Guarantors on Schedule 4.19, and any other Subsidiaries that
     become Subsidiary Guarantors pursuant to Section 5.01(i).

          "Taxes" shall have the meaning provided in Subsection 2.20(a).

          "TCB" shall mean Texas Commerce Bank National Association, in its
     individual capacity and not as Administrative Agent.

          "Three-Month Secondary CD Rate" shall mean, for any day, the secondary
     rate (adjusted to the basis of a year of 365 or 366 days, as the case may
     be) for three-month certificates of deposit reported as being in effect on
     such day (or, if such day shall not be a Business Day, the next preceding
     Business Day) by the Board of Governors of the Federal Reserve System (the
     "Board") through the public information telephone line of the Federal
     Reserve Bank of New York (which rate will, under the current practices of
     the Board, be published in the Federal Reserve Statistical Release
     H.15(519) during the week following such day), or if such rate shall not be
     so reported on such day or such next preceding Business Day, the average of
     the secondary market quotations for three-month certificates of deposit of
     major money center banks in New York City received at approximately 10:00
     A.M., New York City time on such day (or, if such day shall not be a
     Business Day, on the next preceding Day) by the Administrative Agent from
     three New York City negotiable certificate of deposit dealers of recognized
     standing selected by the Administrative Agent.

          "Total Credit Percentage"  shall mean as to any Lender at any time,
     the percentage of the aggregate principal amount of the Tranche A Term
     Loans and the Tranche B Term Loans then constituted by the aggregate
     principal amount of such Lender's Tranche A Term Loans and Tranche B Term
     Loans.

          "Tranche A Term Loan" shall have the meaning provided in Subsection
     2.01(a)(i).

          "Tranche A Term Loan Commitment" shall have the meaning assigned such
     term in Subsection 2.01(c).

          "Tranche A Term Loan Lender" shall mean any Lender having a Tranche A
     Term Loan Commitment hereunder and/or a Tranche A Term Loan outstanding
     hereunder.

          "Tranche A Term Loan Maturity Date" shall mean March 31, 2003.

          "Tranche A Term Loan Percentage" shall mean as to any Tranche A Term
     Loan Lender, the percentage which such Lender's Tranche A Term Loans then
     outstanding constitutes of the aggregate Tranche A Term Loans then
     outstanding.

          "Tranche A Term Note" shall mean a promissory note of the Company
     described in Section 2.05(a) payable to a Tranche A Term Loan Lender and
     being substantially in the form of 

                                       23
<PAGE>
 
     Exhibit B-1, evidencing the aggregate indebtedness of the Company to such
     Lender for Tranche A Term Loans.

          "Tranche B Term Loan" shall have the meaning provided in Subsection
     2.01(a)(ii).

          "Tranche B Term Loan Commitment" shall have the meaning assigned such
     term in Subsection 2.01(d).

          "Tranche B Term Loan Lender" shall mean any Lender having a Tranche B
     Term Loan Commitment hereunder or a Tranche B Term Loan outstanding
     hereunder.

          "Tranche B Term Loan Maturity Date" shall mean September 30, 2004.

          "Tranche B Term Loan Percentage" shall mean as to any Tranche B Term
     Loan Lender, the percentage which such Lender's Tranche B Term Loans then
     outstanding constitutes of the aggregate Tranche B Term Loans then
     outstanding.

          "Tranche B Term Note" shall mean a promissory note of the Company
     described in Section 2.05(b) payable to a Tranche B Term Loan Lender and
     being substantially in the form of Exhibit B-2, evidencing the aggregate
     indebtedness of the Company to such Lender for Tranche B Term Loans.

          "Transactions" shall mean the transactions provided for in and
     contemplated by this Agreement and the other Financing Documents.

          "TSG" shall mean The Sterling Group, Inc., a Texas corporation.

          "Type" of Loan shall mean a Base Rate Loan or Eurodollar Loan.

          "UCC" shall mean the Uniform Commercial Code as from time to time in
     effect in the State of New York or, where applicable as to specific
     Collateral, any other relevant state.

          "U.S. Subsidiary" shall mean all Subsidiaries of the Company organized
     under the laws of any state, territory or subdivision of the United States.

          "U.S. Tax Compliance Certificate" shall have the meaning provided in
     Section 2.20(f)(y).

          "Valdosta Bonds" shall mean any of the Valdosta-Lowndes County
     Industrial Authority Industrial Development Revenue Bonds (Sterling Pulp
     Chemicals US, Inc. Project) Series 1995, issued and outstanding under that
     certain Indenture of Trust dated as of October 1, 1995 between Valdosta-
     Lowndes County Industrial Authority and Synovus Trust Company, as amended
     as of the Closing Date, and thereafter, as amended from time to time to the
     extent permitted by the Financing Documents.

                                       24
<PAGE>
 
          "Valdosta Lease" shall mean that certain Indenture of Lease dated as
     of October 1, 1995 by and between the Valdosta-Lowndes County Industrial
     Authority and Sterling Pulp Chemicals US, Inc., a Delaware corporation.

          "Voting Stock" of any Person shall mean capital stock of such Person
     which ordinarily has voting power for the election of directors (or persons
     performing similar functions) of such Person, whether at all times or only
     so long as no senior class of securities has such voting power by reason of
     any contingency.


     Section 1.02 Accounting Terms and Determinations. Unless otherwise defined
or specified herein, all accounting terms shall be construed herein, all
accounting determinations hereunder shall be made, all financial statements
required to be delivered hereunder shall be prepared in accordance with GAAP
applied on a basis consistent with the Financial Statements, except for changes
concurred with by the Company's independent public accountants; provided that,
if such changes affect the results of the calculations of the financial ratios
required under Section 5.03 (as compared to the results obtained by applying
GAAP in effect on the Closing Date), the Company and the Administrative Agent
(acting on behalf and at the direction of the Required Lenders) agree to
negotiate in good faith to adjust such financial ratios in order to make them
comparable after giving effect to such change in GAAP.

     Section 1.03 Other Definitional Terms. The words "hereof," "herein" and
"hereunder" and words of similar import when used in this Agreement shall refer
to this Agreement as a whole and not to any particular provision of this
Agreement, and article, section, schedule, exhibit and like references are to
this Agreement unless otherwise specified.


                                  ARTICLE II

                           AMOUNT AND TERMS OF LOANS

     Section 2.01  Loans and Commitments.

          (a) Loans.  Subject to the terms and conditions and relying on the
     representations and warranties contained herein, (i) each Tranche A Term
     Loan Lender severally agrees to make, on the Effective Date, term loans
     pursuant to its Tranche A Term Loan Commitment (each a "Tranche A Term
     Loan") to the Company and (ii) each Tranche B Term Loan Lender severally
     agrees to make, on the Effective Date, term loans pursuant to its Tranche B
     Term Loan Commitment (each a "Tranche B Term Loan") to the Company.

          (b) Types of Loans.  The Loans made pursuant hereto by each Lender
     shall, at the option of the Company, be either Base Rate Loans or
     Eurodollar Loans and may be continued or converted pursuant to Section
     2.11, provided that, except as otherwise specifically provided herein, all
     Loans made pursuant to the same Borrowing shall be of the same Type.

                                       25
<PAGE>
 
          (c) Tranche A Term Loan Commitments.  The Tranche A Term Loans made
     pursuant hereto by each Tranche A Term Loan Lender shall not exceed in
     aggregate principal amount outstanding the amount set forth opposite such
     Lender's name on Annex I under the caption "Tranche A Term Loan Commitment"
     (as the same may be from time to time modified pursuant to Section 8.07(b),
     its "Tranche A Term Loan Commitment," and collectively for all Tranche A
     Term Loan Lenders, the "Tranche A Term Loan Commitments").  Any portion of
     each such Lender's Tranche A Term Loan Commitment not utilized on the
     Effective Date shall be permanently cancelled.  Any Tranche A Term Loans
     that are repaid or prepaid may not be reborrowed.

          (d) Tranche B Term Loan Commitments.  The Tranche B Term Loans made
     pursuant hereto by each Tranche B Term Loan Lender shall not exceed in
     aggregate principal amount outstanding the amount set forth opposite such
     Lender's name on Annex I under the caption "Tranche B Term Loan Commitment"
     (as the same may be from time to time modified pursuant to Section 8.07(b),
     its "Tranche B Term Loan Commitment," and collectively for all Tranche B
     Term Loan Lenders, the "Tranche B Term Loan Commitments").  Any portion of
     each such Lender's Tranche B Term Loan Commitment not utilized on the
     Effective Date shall be permanently cancelled.  Any Tranche B Term Loans
     that are repaid or prepaid may not be reborrowed.

          (e) Amounts of Borrowings, etc.  The aggregate principal amount of
     each Borrowing (i) of Eurodollar Loans shall be not less than $3,000,000
     and shall be in an integral multiple of $100,000, and (ii) of Base Rate
     Loans hereunder shall be not less than $1,000,000 and shall be in an
     integral multiple of $100,000.  Borrowings of more than one Type may be
     outstanding at the same time; provided, however, that the Company shall not
     be entitled to request any Borrowing that, if made, would result in an
     aggregate of more than six separate Borrowings of Eurodollar Loans being
     outstanding at any one time.  For purposes of the foregoing, Borrowings
     having different Interest Periods, regardless of whether they commence on
     the same date, shall be considered separate Borrowings.

     Section 2.02  Borrowing Requests.

          (a) Borrowing Requests. The Company shall give the Administrative
     Agent Advance Notice in the form of a Borrowing Request requesting that the
     Lenders make the Loans on the Effective Date and specifying the amount to
     be borrowed.

          (b) Notice by Administrative Agent.  The Administrative Agent shall
     promptly give each Applicable Lender telecopy or telephonic notice (and, in
     the case of telephonic notices, confirmed by telecopy or otherwise in
     writing) of the proposed Borrowing, of such Lender's Applicable Percentage
     thereof and of the other matters covered by the Advance Notice.  The
     Company hereby waives the right to dispute the Administrative Agent's
     record of the terms of such telephonic notice, absent manifest error.

                                       26
<PAGE>
 
     Section 2.03 Replacement of Lenders. If any Lender does not make a
Eurodollar Loan pursuant to Section 2.15, is subject to increased costs pursuant
to Section 2.16, fails to designate an alternate Lending Office pursuant to
Section 2.17, or is owed or reasonably anticipates being owed additional amounts
pursuant to Section 2.20 and fails to take action required under Subsection
2.20(g) to avoid or reduce any such additional amounts, the Company shall have
the right, if no Default then exists, to replace such Lender with another bank
or financial institution with the consent of the Administrative Agent, which
consent shall not be unreasonably withheld, provided that (i) the obligations of
the Company owing to the Lender being replaced (including such increased costs)
that are not being assigned to the replacement lender shall be paid in full to
the Lender being replaced concurrently with such replacement lender, (ii) the
replacement lender shall execute an Assignment and Acceptance pursuant to which
it shall become a party hereto as provided in Section 8.07(c), and (iii) upon
compliance with the provisions for assignment provided in Section 8.07(c) and
the payment of amounts referred to in clause (i), the replacement lender shall
constitute a "Lender" hereunder and the Lender being so replaced shall no longer
constitute a "Lender" hereunder.

     Section 2.04  Disbursement of Funds.

          (a) Availability.  No later than 11:00 a.m. (Houston time) on the date
     of each Borrowing, each Lender will make available to the Administrative
     Agent such Lender's Applicable Percentage of the amount (if any) by which
     the principal amount of the Borrowing requested to be made on such date by
     such Lender exceeds the principal amount of Loans (if any) of such Lender
     maturing on such date, in Dollars and in immediately available funds at the
     Payment Office.  The Administrative Agent will make available to the
     Company at the Payment Office the aggregate of the amounts (if any) so made
     available by the Lenders by depositing such amounts, in immediately
     available funds, to an account of the Company at the Administrative Agent
     designated by the Company for such purpose.

          (b) Funds to the Administrative Agent.  Unless the Administrative
     Agent shall have been notified by any Applicable Lender prior to the date
     of a Borrowing that such Lender does not intend to make available to the
     Administrative Agent such Lender's Applicable Percentage of the Borrowing
     to be made on such date, the Administrative Agent may assume that such
     Lender has made such amount available to the Administrative Agent on such
     date, and the Administrative Agent may make available to the Company a
     corresponding amount.  If such corresponding amount is not in fact made
     available to the Administrative Agent by such Lender on the date of a
     Borrowing, the Administrative Agent shall be entitled to recover such
     corresponding amount on demand from such Lender together with interest at
     the Federal Funds Effective Rate.  If such Lender does not pay such
     corresponding amount forthwith upon the Administrative Agent's demand
     therefor, the Administrative Agent shall promptly notify the Company, and
     the Company shall immediately pay such corresponding amount to the
     Administrative Agent together with interest at the rate specified for the
     Borrowing which includes such amount paid.  Nothing in this Section shall
     be deemed to relieve any Lender from its obligation to fulfill its
     Commitments hereunder or to prejudice any rights which the Company may have
     against any Lender as a result of any default by such Lender hereunder.

          (c) Lenders' Responsibilities.  No Lender shall be responsible for any
     default by any other Lender in its obligation to make Loans hereunder, and
     each Lender shall be obligated to make only 

                                       27
<PAGE>
 
     such Loans provided to be made by it hereunder, regardless of the failure
     of any other Lender to fulfill its Commitment hereunder.

     Section 2.05  Notes and Amortization.

          (a) Tranche A Term Notes and Amortization.  The Company's obligation
     to pay the principal of, and interest on, the Tranche A Term Loans made by
     each Tranche A Term Loan Lender shall be further evidenced by the Company's
     issuance, execution and delivery of a Tranche A Term Note payable to the
     order of each such Lender in the amount of the sum of  such Lender's
     Tranche A Term Loan Commitment (if issued on the Effective Date) or in the
     principal amount of such Lender's Tranche A Term Loans (if issued after the
     Effective Date), and dated as of the date of issuance of such Tranche A
     Term Note.  The aggregate principal amount of the Tranche A Term Notes
     applicable to the aggregate Tranche A Term Loans of all Tranche A Term Loan
     Lenders shall be payable in quarterly installments of the amounts set forth
     below (in each case, as reduced by the application of any prepayments
     pursuant to Section 2.10):

<TABLE>
<CAPTION>
QUARTERLY DATA                  AMOUNT            QUARTERLY DATE      AMOUNT
- --------------                 --------           --------------     -------- 
<S>                          <C>                <C>                 <C>
June 30, 1997                $  348,750         September 30, 2000  $1,123,750
September 30, 1997           $  348,750         December 31, 2000   $1,511,250
December 31, 1997            $  930,000         March 31, 2001      $1,511,250
March 31, 1998               $  930,000         June 30, 2001       $1,511,250
June 30, 1998                $  930,000         September 30, 2001  $1,511,250
September 30, 1998           $  930,000         December 31, 2001   $1,898,750
December 31, 1998            $  930,000         March 31, 2002      $1,898,750
March 31, 1999               $  930,000         June 30, 2002       $1,898,750
June 30, 1999                $  930,000         September 30, 2002  $1,898,750
September 30, 1999           $  930,000         December 31, 2002   $2,363,750
December 31, 1999            $1,123,750         March 31, 2003      $2,363,750 
March 31, 2000               $1,123,750  
June 30, 2000                $1,123,750 
</TABLE>

     The first such quarterly installment shall be payable on June 30, 1997, and
     the remaining quarterly installments shall be payable on each Quarterly
     Date thereafter, with the final installment in the amount of the aggregate
     unpaid principal balance then owing being payable on or before the Tranche
     A Term Loan Maturity Date.

          (b) Tranche B Term Notes and Amortization.  The Company's obligation
     to pay the principal of, and interest on, the Tranche B Term Loans made by
     each Tranche B Term Loan Lender shall be further evidenced by the Company's
     issuance, execution and delivery of a Tranche B Term Note payable to the
     order of each such Lender in the amount of the sum of  such Lender's

                                       28
<PAGE>
 
     Tranche B Term Loan Commitment (if issued on the Effective Date) or in the
     principal amount of such Lender's Tranche B Term Loans (if issued after the
     Effective Date), and dated as of the date of issuance of such Tranche B
     Term Note.  The aggregate principal amount of the Tranche B Term Notes
     applicable to the aggregate Tranche B Term Loans of all Tranche B Term Loan
     Lenders shall be payable in quarterly installments in the amounts set forth
     below (in each case, as reduced by the application of any prepayments
     pursuant to Section 2.10):

<TABLE>
<CAPTION>
 
QUARTERLY DATA             AMOUNT            QUARTERLY DATE       AMOUNT
- --------------             ------            --------------       ------
<S>                        <C>               <C>                 <C>
June 30, 1997              $83,333           March 31, 2001      $   83,333
September 30, 1997         $83,333           June 30, 2001       $   83,333
December 31, 1997          $83,333           September 30, 2001  $   83,333
March 30, 1998             $83,333           December 31, 2001   $   83,333
June 30, 1998              $83,333           March 31, 2002      $   83,333
September 30, 1998         $83,333           June 30, 2002       $   83,333
December 31, 1998          $83,333           September 30, 2002  $   83,333
March 31, 1999             $83,333           December 31, 2002   $   83,333
June 30, 1999              $83,333           March 31, 2003      $   83,333
September 30, 1999         $83,333           June 30, 2003       $7,750,004
December 31, 1999          $83,333           September 30, 2003  $7,750,004
March 30, 2000             $83,333           December 31, 2003   $8,125,000
June 30, 2000              $83,333           March 30, 2004      $8,125,000
September 30, 2000         $83,333           June 30, 2004       $8,125,000
December 31, 2000          $83,333           September 30, 2004  $8,125,000
</TABLE>

     The first such quarterly installment shall be payable on June 30, 1997, and
     the remaining quarterly installments shall be payable on each Quarterly
     Date thereafter, with the final installment in the amount of the aggregate
     unpaid principal balance then owing being payable on or before the Tranche
     B Term Loan Maturity Date.

     Section 2.06  Interest. In all cases subject to Section 8.12:

          (a) Base Rate Loans.  Subject to Section 2.06(c), the Company agrees
     to pay interest in respect of the unpaid principal amount of each Base Rate
     Loan from the date thereof until payment in full thereof at a rate per
     annum which shall be, for any day, equal to the sum of the Applicable
     Margin plus the Base Rate in effect on such day, but in no event to exceed
     the Highest Lawful Rate.  The term "Base Rate" shall mean, for any day, the
     highest of (i) the Prime Rate in effect on such day,  (ii) one-half of one
     percent (2%) plus the Federal Funds Effective Rate in effect for such day
     (rounded upwards, if necessary, to the nearest 1/16th of 1%), and (iii) one
     percent (1%) plus the Base CD Rate in effect on such day, but in no event
     to exceed the Highest Lawful Rate.  For purposes of this Agreement, any
     change in the Base Rate due to a change in the Three-Month Secondary CD
     Rate,  the  Federal Funds Effective Rate, or the Prime Rate shall be
     effective as of the opening of business  on the effective date of such
     change in the Three-Month Secondary CD Rate, the Federal Funds Effective
     Rate, or the Prime Rate, as the case may be.  If for any reason the
     Administrative Agent shall 

                                       29
<PAGE>
 
     have determined (which determination shall be conclusive and binding,
     absent manifest error) that it is unable to ascertain the Federal Funds
     Effective Rate and the Three-Month Secondary CD Rate for any reason,
     including but not limited to the inability of the Administrative Agent to
     obtain sufficient bids or publications in accordance with the terms hereof,
     the Base Rate shall be the Prime Rate until the circumstances giving rise
     to such inability no longer exist.

          (b) Eurodollar Loans.  Subject to Section 2.06(c), the Company agrees
     to pay interest in respect of the unpaid principal amount of each
     Eurodollar Loan from the date thereof until payment in full thereof at a
     rate per annum which shall be the sum of the relevant Applicable Margin
     plus the Eurodollar Rate, but in no event to exceed the Highest Lawful
     Rate.

          (c) Default Interest.  If the Company shall default in the payment of
     the principal of or interest on any Loan or any other amount becoming due
     hereunder or under any Financing Document, by acceleration or otherwise,
     the Company shall on demand from time to time pay interest, to the extent
     permitted by law, on such defaulted amount to but excluding the date of
     actual payment (after as well as before judgment) at a rate per annum equal
     to (a) in the case of any Eurodollar Loan, the rate that would be
     applicable under Section 2.06(b) to such Eurodollar Loan, plus 2% per
     annum, and (b) in the case of any other amount, the rate that would be
     applicable under Section 2.06(a) to a Base Rate Loan, plus 2% per annum.

          (d) Interest Payment Dates.  Interest on each Loan shall accrue from
     and including the date of such Loan to but excluding the date of payment in
     full thereof.  Interest on each Eurodollar Loan shall be payable on the
     last day of each Interest Period applicable thereto and, in the case of an
     Interest Period in excess of three months, on each day which occurs every
     three months after the initial date of such Interest Period, and on any
     prepayment (on the amount prepaid), at maturity (whether by acceleration or
     otherwise) and, after maturity, on demand.  Interest on each Base Rate Loan
     shall be payable on each Quarterly Date, commencing on the first of such
     days to occur after such Loan is made, at maturity (whether by acceleration
     or otherwise) and, after maturity, on demand.

          (e) Notice by the Administrative Agent.  The Administrative Agent,
     upon determining the Eurodollar Rate for any Interest Period, shall
     promptly notify by telecopy or telephone (in the case of telephonic
     notices, confirmed by telecopy or otherwise in writing) or in writing the
     Company and the Applicable Lenders.

     Section 2.07 Interest Periods. In connection with each Borrowing of
Eurodollar Loans, the Company shall elect an Interest Period to be applicable to
such Borrowing, which Interest Period shall begin on and include, as the case
may be, the date selected by the Company pursuant to Section 2.02(a), the
conversion date or the date of expiration of the then current Interest Period
applicable thereto, and end on but exclude the date which is either one, two,
three, six or (subject to availability by each Applicable Lender) twelve months
thereafter, as selected by the Company; provided that:

          (a) Business Days.  If any Interest Period would otherwise expire on a
     day which is not a Business Day, such Interest Period shall expire on the
     next succeeding Business Day, provided, further, that if any Interest
     Period (other than in respect of a Borrowing of Eurodollar Loans the

                                       30
<PAGE>
 
     Interest Period of which is expiring pursuant to Section 2.15(b) hereof)
     would otherwise expire on a day which is not a Business Day but is a day of
     the month after which no further Business Day occurs in such month, such
     Interest Period shall expire on the next preceding Business Day;

          (b) Month End.  Any Interest Period which begins on the last Business
     Day of a calendar month (or on a day for which there is no numerically
     corresponding day in the calendar month at the end of such Interest Period)
     shall, subject to Subsection (c) below, end on the last Business Day of a
     calendar month;

          (c) Payment Limitations.  No Interest Period shall extend beyond any
     date that any principal payment or prepayment is scheduled to be due unless
     the aggregate principal amount of Borrowings which are Borrowings of Base
     Rate Loans or which have Interest Periods which will expire on or before
     such date, less the aggregate amount of any other principal payments or
     prepayments due during such Interest Period, is equal to or in excess of
     the amount of such principal payment or prepayment; and

          (d) Maturity Dates.  No Interest Period with regard to Tranche A Loans
     shall extend beyond the Tranche A Term Loan Maturity Date and no Interest
     Period with regard to Tranche B Term Loans shall extend beyond the Tranche
     B Term Loan Maturity Date.

     Section 2.08  Repayment of Loans.

          (a) The Company hereby unconditionally promises to pay to the
     Administrative Agent for the account of (i) each Tranche A Term Loan
     Lender, the amounts specified in Section 2.05(a), on the dates specified in
     Section 2.05(a) (or such earlier date on which the Tranche A Term Loans
     become due and payable pursuant to Article VI) and (ii) each Tranche B Term
     Loan Lender, the amounts specified in Section 2.05(b), on the dates
     specified in Section 2.05(b) (or such earlier date on which the Tranche B
     Term Loans become due and payable pursuant to Article VI).  The Company
     hereby further agrees to pay interest on the unpaid principal amount of the
     Loans from time to time outstanding from the date hereof until payment in
     full thereof at the rates per annum, and on the dates, set forth in Section
     2.06.

          (b) Each Lender shall maintain in accordance with its usual practice
     an account or accounts evidencing indebtedness of the Company to such
     Lender resulting from each Loan of such Lender from time to time,
     including, without limitation, the amounts of principal and interest
     payable and paid to such Lender from time to time under this Agreement.

          (c) The Administrative Agent shall maintain the Register pursuant to
     Section 8.07(d), and a subaccount therein for each Lender, in which shall
     be recorded (i) the amount of each Loan made hereunder, the Type thereof
     and each Interest Period, if any, applicable thereto, (ii) the amount of
     any principal or interest due and payable or to become due and payable from
     the Company to each Lender hereunder and (iii) both the amount of any sum
     received by the Administrative Agent hereunder from the Company and each
     Lender's Applicable Percentage thereof.

                                       31
<PAGE>
 
          (d) The entries made in the Register and the accounts of each Lender
     maintained pursuant to Section 2.08(b) shall, to the extent permitted by
     applicable law, be prima facie evidence of the existence and amounts of the
     obligations of the Company therein recorded; provided, however, that the
     failure of any Lender or the Administrative Agent to maintain the Register
     or any such account, or any error therein, shall not in any manner affect
     the obligation of the Company to repay (with applicable interest) the Loans
     made to the Company by such Lender in accordance with the terms of this
     Agreement.

     Section 2.09 Termination of Commitments. Any or all of the Commitments
remaining unused as of 5:00 p.m. on the Closing Date shall automatically
terminate at such time.

     Section 2.10  Prepayments.

          (a) Mandatory Combined Term Loan Prepayments.  Subject to the terms of
     the Intercreditor Agreement:

          (i) On or before the 105th day after each September 30th, commencing
     on September 30, 1997, the Company shall deliver to each Lender the
     Company's calculation of its Excess Cash Flow for the Fiscal Year ended on
     such September 30th; provided that for purposes of this Section 2.10(a),
     the period ending on September 30, 1997, shall begin on August 22, 1996 and
     end on September 30, 1997.  On the third day after delivery of the notice
     provided above, but in no event later than the 108th day after each
     September 30th, commencing September 30, 1997, the Company shall prepay (by
     payment to the Administrative Agent for distribution to the Lenders and the
     Original Term Loan Lenders as provided below) an aggregate principal amount
     of Combined Term Loans equal to (A) 75% of Excess Cash Flow for any Fiscal
     Year (or other applicable period as provided above) if, as of the last day
     of the applicable Fiscal Year, the aggregate principal amount of the
     Original Tranche A Term Loans, the Original Tranche B Term Loans and the
     Loans is equal to or greater than $203,000,000, and (B) 50% of Excess Cash
     Flow for any Fiscal Year thereafter (provided that, other Indebtedness of
     the Company and its Subsidiaries has not been used to effect such repayment
     of Combined Term Loans); and, in the case of (A) and (B) above, less the
     amount of any voluntary prepayments of Combined Term Loans made by the
     Company as permitted in Subsection 2.10(b) during such Fiscal Year (or
     other applicable period).

          (ii) At any time the Company becomes obligated to prepay all or part
     of the Senior Subordinated Notes, the Company shall, prior to any
     prepayment of the Senior Subordinated Notes, prepay the Combined Term Loans
     in full.

          (iii)  At any time that the Company and its Subsidiaries sell, lease,
     or otherwise dispose of any of their Property, the Company shall promptly
     prepay an aggregate principal amount of Combined Term Loans equal to the
     amount of Net Proceeds in excess of $5,000,000 in the aggregate in any
     Fiscal Year, received from such sale, lease or disposal of Property, less
     the amount reinvested pursuant to Subsection 5.04(c)(i)(C)(2).

                                       32
<PAGE>
 
          (iv) Prepayments of the Combined Term Loans pursuant to this Section
     2.10(a) shall be applied (i), so long as no Default has occurred and is
     continuing, to the Original Tranche A Term Loans, the Original Tranche B
     Term Loans and the Loans (A) pro rata based on outstanding principal amount
     thereof at the time of such prepayment and (B) pro rata to the respective
     installments of principal thereof, and (ii), if a Default has occurred and
     is continuing, (A) pro rata (based on outstanding principal amount thereof
     at the time of such prepayment) to the Original Tranche A Term Loans, the
     Original Tranche B Term Loans, the Loans and the ESOP Term Loans and (B)
     pro rata to the respective installments of principal thereof.
     Notwithstanding the foregoing, in respect of any partial prepayment of
     Combined Term Loans (until such time as the Original Tranche A Term Loans
     and the Tranche A Term Loans have been repaid in full) pursuant to this
     Section 2.10(a), any Original Tranche B Term Loan Lender or Tranche B Term
     Loan Lender may, at its option, irrevocably decline receipt of its Original
     Tranche B Term Loan or Tranche B Term Loan, as applicable, share of any
     such prepayment, and, if such lender so declines, such share shall be
     applied as an additional prepayment of the Original Tranche A Term Loans
     and the Tranche A Term Loans, the other Original Tranche B Term Loans and
     Tranche B Term Loans, as applicable, and ESOP Term Loans in accordance with
     the immediately preceding sentence, as further adjusted pursuant to the
     balance of this Section 2.10(a).  In the case of any prepayment pursuant to
     clauses (i,) (ii), or (iii), the Company shall provide to the
     Administrative Agent written notice of such prepayment at least five
     Business Days prior to the date such prepayment is to be made.  Any Tranche
     B Term Loan Lender may notify the Administrative Agent and the Company of
     its election to decline its Tranche B Term Loan share of all such
     prepayments, in which event such notice shall be effective until such
     Lender notifies the Administrative Agent and the Company to the contrary.
     Any Tranche B Term Loan Lender that wishes to decline receipt of its share
     of any given prepayment pursuant to this Section 2.10(a), shall promptly,
     and in any event no later than 10:00 a.m. (Houston, Texas time) on the date
     following its receipt of the notice of such prepayment, notify the Company
     and the Administrative Agent of such election.  Any Tranche B Term Loan
     Lender that has not provided notice pursuant to one of the two preceding
     sentences prior to such 10:00 a.m. deadline shall be deemed to have elected
     to accept such prepayment.  The Administrative Agent shall promptly
     provide, to all such accepting Tranche B Term Loan Lenders, notice of the
     principal amount of the Original Tranche B Term Loans and Tranche B Term
     Loans that such lenders have elected to decline.  Any such accepting Lender
     may, at its option, irrevocably decline receipt of its share of any such
     declined shares of such prepayment (and shall indicate in such notice
     whether it elects to accept or decline receipt of its share of such
     prepayment declined by other Original Lenders or Lenders pursuant to this
     sentence), and, if such Original Lender or Lender so declines, such share
     shall be applied as an additional prepayment of the Original Tranche A Term
     Loans, the other Original Tranche B Term Loans, the Tranche A Term Loans,
     the other Tranche B Term Loans and the ESOP Term Loans in accordance with
     this Section 2.10(a).  Any Tranche B Term Loan Lender that wishes to
     decline receipt of its share of such declined shares, shall promptly, and
     in any event no later than 10:00 a.m. (Houston, Texas time) on the date
     following receipt of the notice from the Administrative Agent regarding
     such declined shares, notify the Company and the Administrative Agent of
     such election.  Any such accepting Lender that has not provided such notice
     prior to such 10:00 a.m. deadline shall be deemed to have elected to accept
     the full amount of its share of such prepayment.

                                       33
<PAGE>
 
          (b) Voluntary Prepayments.  Subject to the terms of the Intercreditor
     Agreement, the Company may, at its option, at any time and from time to
     time, prepay the Loans, in whole or in part, upon giving three Business
     Days' prior written notice to the Administrative Agent.  Such notice shall
     specify (i) the date and amount of prepayment,  (ii) whether the prepayment
     is of Eurodollar Loans, Base Rate Loans or a combination thereof, and, in
     each case if a combination thereof, the principal amount allocable to each,
     and (iii) whether the Company shall approve the election, if any, of the
     Original Tranche B Term Loan Lenders or the Tranche B Term Loan Lenders to
     decline their share of any such prepayment as further provided in this
     Section 2.10(b).  Upon receipt of such notice, the Administrative Agent
     shall promptly notify each Applicable Lender of the contents thereof and of
     such Lender's Applicable Percentage of such prepayment and, in the case of
     any Tranche B Term Loan Lender, whether or not the Company has elected to
     permit each Tranche B Term Loan Lender to, at its option, decline its
     Tranche B Term Loan share of such prepayment.  If any such notice is given,
     the amount specified in such notice shall be due and payable on the date
     specified therein, together with (if a Eurodollar Loan is prepaid other
     than at the end of the Interest Period applicable thereto) any amounts
     payable pursuant to Section 2.18 and accrued interest to such date on the
     amount prepaid.  Prepayments of (i) the Loans pursuant to this Section
     2.10(b) shall be applied (A) so long as no Default has occurred and is
     continuing, first, to the Original Tranche A Term Loans, the Original
     Tranche B Term Loans and the Loans (x) pro rata based on outstanding
     principal amount thereof at the time of such prepayment and (y) pro rata to
     the respective installments of principal thereof, and, second, to the ESOP
     Term Loans pro rata to the respective installments of principal thereof,
     and (B) if a Default has occurred and is continuing, (x) pro rata (based on
     outstanding principal amount thereof at the time of such prepayment) to the
     Original Tranche A Term Loans, the Original Tranche B Term Loans, the Loans
     and the ESOP Term Loans and (y) pro rata to the respective installments of
     principal thereof.  Notwithstanding the foregoing and subject to the
     Company's approval described above, in respect of any partial prepayment of
     Combined Loans (until such time as the Original Tranche A Term Loans and
     the Tranche A Term Loans have been repaid in full) pursuant to this Section
     2.10(b), any Original Tranche B Term Loan Lender or Tranche B Term Loan
     Lender may, at its option, irrevocably decline receipt of its Original
     Tranche B Term Loan or Tranche B Term Loans, as applicable, share of any
     such prepayment, and, if such lender so declines, such share shall be
     applied as an additional prepayment of the Original Tranche A Term Loans,
     the other Original Tranche B Term Loans, the Tranche A Term Loans, the
     other Tranche B Term Loans and the ESOP Term Loans in accordance with the
     immediately preceding sentence, as further adjusted pursuant to balance of
     this Section 2.10(b).  Any Tranche B Term Loan Lender may notify the
     Administrative Agent and the Company of its election to decline its Tranche
     B Term Loan share of all such prepayments, in which event such notice shall
     be effective until such Lender notifies the Administrative Agent and the
     Company to the contrary.  Any Tranche B Term Loan Lender that wishes to
     decline receipt of its share of any given prepayment pursuant to this
     Section 2.10(b), shall promptly, and in any event no later than 10:00 a.m.
     (Houston, Texas time) on the date following receipt of its notice of such
     prepayment, notify the Company and the Administrative Agent of such
     election.  Any Tranche B Term Loan Lender that has not provided notice
     pursuant to one of the two preceding sentences prior to such 10:00 a.m.
     deadline shall be deemed to have elected to accept such prepayment.  The
     Administrative Agent shall promptly provide, to all such accepting Tranche
     B Term Loan Lenders, notice of the principal amount of the Original Tranche

                                       34
<PAGE>
 
     B Term Loans  and the Tranche B Term Loans that such lenders have elected
     to decline.  Any such accepting Lender may, at its option, irrevocably
     decline receipt of its share of any such declined shares of such prepayment
     (and shall indicate in such notice whether it elects to accept or decline
     receipt of its share of such prepayment declined by such other lenders
     pursuant to this sentence), and, if such Lender so declines, such share
     shall be applied as an additional prepayment of the Original Tranche A Term
     Loans, the other Original Tranche B Term Loans, the Tranche A Term Loans,
     the other Tranche B Term Loans and the ESOP Term Loans in accordance with
     this Section 2.10(b).  Any Tranche B Term Loan Lender that wishes to
     decline receipt of its share of the reallocation of such declined shares,
     shall promptly, and in any event no later than 10:00 a.m. (Houston, Texas
     time) on the date following receipt of the notice from the Administrative
     Agent regarding such declined shares, notify the Company and the
     Administrative Agent of such election.  Any such accepting Lender that has
     not provided such notice prior to such 10:00 a.m. deadline shall be deemed
     to have elected to accept the full amount of its share of such prepayment.
     After repayment in full of the Original Loans, each prepayment of Base Rate
     Loans shall be in the minimum principal amount of $1,000,000 and in
     integral multiples of $100,000 and each prepayment of Eurodollar Loans
     shall be in the minimum principal amount of $3,000,000 and in integral
     multiples of $100,000 or, in the case of either Base Rate Loans or
     Eurodollar Loans, the aggregate principal balance outstanding on the Loans.

          (c) Notice by Administrative Agent.  Upon receipt of a notice of
     prepayment pursuant to this Section, the Administrative Agent shall
     promptly notify each Applicable Lender of the contents thereof and of such
     Lender's ratable share of such prepayment.

     Section 2.11  Continuation and Conversion Options.

          (a) Continuation.  The Company may elect to continue all or any part
     of any Borrowing of Eurodollar Loans beyond the expiration of the then
     current Interest Period relating thereto by giving Advance Notice (which
     shall be irrevocable) to the Administrative Agent of such election,
     specifying the Eurodollar Loans or portion thereof to be continued and the
     Interest Period therefor.  In the absence of such a timely and proper
     election with regard to Eurodollar Loans, the Company shall be deemed to
     have elected to convert such Eurodollar Loans to Base Rate Loans pursuant
     to Subsection 2.11(d).

          (b) Amounts of Continuations.  All or part of any Eurodollar Loans may
     be continued as provided herein, provided that any continuation of such
     Loans shall not be (as to each Borrowing of such Loans as continued for an
     applicable Interest Period) less than $3,000,000 and shall be in an
     integral multiple of $100,000.

          (c) Continuation or Conversion Upon Default.  If no Default shall have
     occurred and be continuing, each Eurodollar Loan may be continued or
     converted as provided in this Section.  If a Default shall have occurred
     and be continuing, the Company shall not have the option to elect to
     continue any such Eurodollar Loan pursuant to Subsection 2.11(a) or to
     convert Base Rate Loans to Eurodollar Loans pursuant to Subsection 2.11(e).

                                       35
<PAGE>
 
          (d) Conversion to Base Rate.  The Company may elect to convert any
     Eurodollar Loan on the last day of the then current Interest Period
     relating thereto to a Base Rate Loan by giving Advance Notice to the
     Administrative Agent of such election.

          (e) Conversion to Eurodollar Rate.  The Company may elect to convert
     any Base Rate Loan at any time or from time to time to a Eurodollar Loan by
     giving Advance Notice (which shall be irrevocable) to the Administrative
     Agent of such election, specifying each Interest Period therefor.

          (f) Amounts of Conversions.  All or any part of the outstanding Loans
     may be converted as provided herein, provided that any conversion of such
     Loans shall not result in a Borrowing of Eurodollar Loans in an amount less
     than $3,000,000 and in integral multiples of $100,000.

     Section 2.12 Fees. The Company shall pay to the Administrative Agent such
fees as are set forth in the Fee Letter, as the same has been or may be
hereafter amended or supplemented, on the dates and in the manner specified
therein.

     Section 2.13  Payments, etc.

          (a) Without Setoff, etc.  Except as otherwise specifically provided
     herein, all payments under this Agreement shall be made to the
     Administrative Agent on behalf of the Applicable Lenders without defense,
     set-off or counterclaim to the Administrative Agent not later than 11:00
     a.m. Houston time on the date when due and shall be made in Dollars in
     immediately available funds at the Payment Office.  The Administrative
     Agent will promptly thereafter distribute funds in the form received
     relating to the payment of principal or interest ratably to the Applicable
     Lenders for the account of their respective Lending Offices, and funds in
     the form received relating to the payment of any other amount payable to
     any Lender to such Lender for the account of its Lending Office.

          (b) Non-Business Days.  Whenever any payment to be made hereunder or
     under any Note shall be stated to be due on a day which is not a Business
     Day, the due date thereof shall be extended to the next succeeding Business
     Day (except as otherwise provided in Section 2.07 hereof) and, with respect
     to payments of principal, interest thereon shall be payable at the
     applicable rate during such extension.

          (c) Computations.  All computations of interest shall be made on the
     basis of a year of 360 days (unless such calculation would result in a
     usurious rate, in which case interest shall be calculated on the basis of a
     year of 365 or 366 days, as the case may be) in the case of Eurodollar
     Loans or Base Rate Loans that are based upon the Federal Funds Effective
     Rate or the Base CD Rate, and 365 or 366 days (as the case may be) in the
     case of Base Rate Loans that are based upon the Prime Rate, and all
     computations of fees shall be made on the basis of a year of 360 days
     (unless such calculation would result in a usurious rate, in which case
     interest shall be calculated on the basis of a year of 365 or 366 days, as
     the case may be), in each case for the actual number of days (including the
     first day but excluding the last day) occurring in the period for which
     such interest or fees are payable.  Each determination by the
     Administrative Agent of an interest rate or fee hereunder shall, except for
     manifest error, be final, conclusive and binding for all purposes, provided
     that such 

                                       36
<PAGE>
 
     determination shall be made in good faith in a manner generally consistent
     with the Administrative Agent's standard practice. If the Administrative
     Agent and the Company determine that manifest error exists, said parties
     shall correct such error by way of an adjustment to the payment due on the
     next Quarterly Date.

     Section 2.14 Interest Rate Not Ascertainable, etc. In the event that the
Administrative Agent shall have determined (which determination shall be
reasonably exercised and shall, absent manifest error, be final, conclusive and
binding upon all parties) that on any date for determining the Eurodollar Rate
for any Interest Period, by reason of any changes arising after the date of this
Agreement affecting the interbank Eurodollar market, or any Lender's position in
such market, adequate and fair means do not exist for ascertaining the
applicable interest rate on the basis provided for in the definition of
Eurodollar Rate, then, and in any such event, the Administrative Agent shall
forthwith give notice (by telephone confirmed in writing) to the Company and to
the Lenders of such determination. Until the Administrative Agent notifies the
Company that the circumstances giving rise to the suspension described herein no
longer exist, the obligations of the Lenders to make Eurodollar Loans shall be
immediately suspended; any Borrowing of Eurodollar Loans that is requested (by
continuation, conversion or otherwise) shall instead be made as a Borrowing of
Base Rate Loans, and any outstanding Eurodollar Loan shall be converted, on the
last day of the then current Interest Period applicable thereto, to a Base Rate
Loan.

     Section 2.15  Illegality.

          (a) Determinations of Illegality.  In the event that any Lender shall
     have determined (which determination shall be reasonably exercised and
     shall, absent manifest error, be final, conclusive and binding upon all
     parties) at any time that the making or continuance of any Eurodollar Loan
     has become unlawful as a result of compliance by such Lender in good faith
     with any applicable law, governmental rule, regulation, guideline or order
     (whether or not having the force of law and whether or not failure to
     comply therewith would be unlawful), then, in any such event, the Lender
     shall give prompt notice (by telephone confirmed in writing) to the Company
     and to the Administrative Agent of such determination (which notice the
     Administrative Agent shall promptly transmit to the other Lenders).

          (b) Eurodollar Loans Suspended.  Upon the giving of the notice to the
     Company referred to in Subsection (a) above, (i) the Company's right to
     request (by continuation, conversion or otherwise) and such Lender's
     obligation to make Eurodollar Loans shall be immediately suspended, and
     thereafter, any requested Borrowing of Eurodollar Loans shall, as to such
     Lender only, be deemed to be a request for a Base Rate Loan, and (ii) if
     the affected Eurodollar Loan or Loans are then outstanding, the Company
     shall immediately, or if permitted by applicable law, no later than the
     date permitted thereby, upon at least one Business Day's written notice to
     the Administrative Agent and the affected Lender, convert each such
     Eurodollar Loan into a Base Rate Loan, provided that if more than one
     Lender is affected at any time, then all affected Lenders must be treated
     the same pursuant to this Subsection.

                                       37
<PAGE>
 
     Section 2.16  Increased Costs.

          (a) Eurodollar Regulations, etc.  If, by reason of (x) after the date
     hereof, the introduction of or any change (including, but not limited to,
     any change by way of imposition or increase of reserve requirements) in or
     in the interpretation of any law or regulation, or (y) the compliance with
     any guideline or request issued by any central bank or other governmental
     authority or quasi-governmental authority exercising control over banks or
     financial institutions generally that becomes effective after the Closing
     Date  (whether or not having the force of law):

               (i) any Lender (or its applicable Lending Office) shall be
          subject to any tax, duty or other charge with respect to its
          Eurodollar Loans or its obligation to make Eurodollar Loans, or shall
          change the basis of taxation of payments to any Lender of the
          principal of or interest on its Eurodollar Loans or its obligation to
          make Eurodollar Loans (except for changes in the rate of tax on the
          overall net income or gross receipts of such Lender or its applicable
          Lending Office imposed by the jurisdiction in which such Lender's
          principal executive office or applicable Lending Office is located);
          or

               (ii) any reserve (including, but not limited to, any imposed by
          the Board of Governors of the Federal Reserve System, but excluding
          any such reserve requirement that is reflected in the Eurodollar
          Rate), special deposit or similar requirement against assets of,
          deposits with or for the account of, or credit extended by, any Lender
          or its applicable Lending Office shall be imposed or deemed applicable
          or any other condition affecting its Eurodollar Loans or its
          obligations to make Eurodollar Loans shall be imposed on any Lender or
          its applicable Lending Office or the interbank Eurodollar market or
          the secondary certificate of deposit market;

     and as a result thereof there shall be any increase in the cost to such
     Lender of agreeing to make or making, funding or maintaining Eurodollar
     Loans (except to the extent already included in the determination of the
     applicable Eurodollar Rate) or there shall be a reduction in the amount
     received or receivable by such Lender or its applicable Lending Office,
     then the Company shall from time to time, upon written notice from and
     demand by such Lender (with a copy of such notice and demand to the
     Administrative Agent), pay to such Lender, within 30 days after the date
     specified in such notice and demand, additional amounts determined by such
     Lender in a reasonable manner to be sufficient to indemnify such Lender
     against such increased cost.  A certificate as to the amount of such
     increased cost and the calculation thereof, submitted to the Company and
     the Administrative Agent by such Lender, shall, except for manifest error,
     be final, conclusive and binding for all purposes, provided that the
     determination of such amount shall be made in good faith in a manner
     generally consistent with such Lender's standard practice.

          (b) Costs.  If any Lender shall advise the Administrative Agent that
     at any time, because of the circumstances described in clauses (x) or (y)
     in Subsection 2.16(a) or any other circumstances arising after the
     Effective Date affecting such Lender or the interbank Eurodollar market or
     such Lender's position in such market, the Eurodollar Rate, as determined
     in good faith by the 

                                       38
<PAGE>
 
     Administrative Agent, will not adequately and fairly reflect the cost to
     such Lender of funding its Eurodollar Loans, then, and in any such event:

               (i) the Administrative Agent shall forthwith give notice (by
          telephone confirmed in writing) to the Company and to the Lenders of
          such advice;

               (ii) the Company's right to request a Borrowing of Eurodollar
          Loans from such Lender and such Lender's obligation to make Eurodollar
          Loans shall be immediately suspended, any such Borrowing of
          Eurodollar Loans that is requested (by continuation, conversion or
          otherwise) shall, as to such Lender only, be deemed to be a request
          for a Base Rate Loan, and any such outstanding Eurodollar Loan from
          such Lender shall be converted, on the last day of the then current
          Interest Period applicable thereto, to a Base Rate Loan.

          (c) Capital Adequacy.  If, by reason of (i) after the date hereof, the
     introduction of or any change (including, but not limited to, any change by
     way of imposition or increase of reserve requirements) in or in the
     interpretation of any law or regulation, or (ii) the compliance with any
     guideline or request issued by any central bank or other governmental
     authority or quasi-governmental authority exercising control over banks or
     financial institutions generally that becomes effective after the Closing
     Date (whether or not having the force of law) affects or would affect the
     amount of capital required to be maintained by any Lender or any
     corporation controlling such Lender, and the amount of such capital is
     increased by or based upon the existence of such Lender's Loans or such
     Lender's Commitment to lend hereunder and other commitments of this type,
     then, within 30 days after written request therefor by such Lender (with a
     copy of such request to the Administrative Agent), the Company shall pay to
     such Lender, from time to time as specified by such Lender, additional
     amounts sufficient to compensate such Lender for the increased cost of such
     additional capital in light of such circumstances, to the extent that such
     Lender reasonably determines such increase in capital to be allocable to
     the existence of such Lender's Loans or such Lender's Commitment to lend
     hereunder.  A certificate as to such amounts and the calculation thereof,
     submitted to the Company and the Administrative Agent by such Lender, shall
     be conclusive and binding for all purposes, absent manifest error, provided
     that the determination of such amount shall be made in good faith in a
     manner generally consistent with such Lender's standard practice.

          (d) Notice.  The Company shall not be obligated to compensate any
     Lender pursuant to this Section 2.16 for any amounts attributable to a
     period more than one year prior to the giving of notice by such Lender to
     the Company of its intention to seek compensation under this Section 2.16.

     Section 2.17 Change of Lending Office. Each Lender agrees that it will use
reasonable efforts to designate an alternate Lending Office with respect to any
of its Eurodollar Loans affected by the matters or circumstances described in
Sections 2.14, 2.15 or 2.16 to reduce the liability of the Company or avoid the
results provided thereunder, so long as such designation is not disadvantageous
to such Lender as determined by such Lender in its sole discretion; provided
that such Lender shall have no obligation to so designate an alternate Lending
Office located in the United States.

                                       39
<PAGE>
 
     Section 2.18 Funding Losses. The Company shall compensate each Lender, upon
its written request (which request shall set forth the basis for requesting such
amounts and shall, absent manifest error, be final, conclusive and binding upon
all of the parties hereto), for all losses, expenses and liabilities (including,
but not limited to, any interest paid by such Lender to lenders of funds
borrowed by it to make or carry its Eurodollar Loans to the extent not recovered
by the Lender in connection with the re-employment of such funds and excluding
loss of anticipated profits), which the Lender may sustain: (i) if for any
reason (other than a default by such Lender) a Borrowing of Eurodollar Loans
does not occur on the date specified therefor in a Borrowing Request (whether or
not withdrawn), including, but not limited to a failure by the Company to
fulfill on the date of any Borrowing of Eurodollar Loans the conditions set
forth in Article III, or to convert or continue any Eurodollar Loan hereunder
after irrevocable notice of such conversion or continuation has been given
pursuant to Section 2.11 (ii), if any payment, prepayment or conversion of any
of its Eurodollar Loans required or permitted by any other provision of this
Agreement or otherwise, or any assignment of a Eurodollar Loan pursuant to
Section 2.22, in each case is made or deemed made on a date which is not the
last day of the Interest Period applicable thereto, or (iii) if, for any reason,
the Company defaults in its obligation to repay its Eurodollar Loans or interest
accrued thereon as and when due and payable (at the due date thereof, whether at
scheduled maturity, by acceleration, irrevocable notice of prepayment or
otherwise).

     Section 2.19 Sharing of Payments, etc. If any Lender shall obtain any
payment or reduction (including, but not limited to, any amounts received as
adequate protection of a deposit treated as cash collateral under the Bankruptcy
Code) of any obligation of the Company hereunder (whether voluntary,
involuntary, through the exercise of any right of set-off, or otherwise) in
excess of its ratable share of payments or reductions on account of such
obligations obtained by all the Lenders, such Lender shall forthwith (i) notify
each of the other Lenders and the Administrative Agent of such receipt, and (ii)
purchase from the other Lenders such participations in the affected obligations
as shall be necessary to cause such purchasing Lender to share the excess
payment or reduction, net of costs incurred in connection therewith, ratably
with each of them, provided that if all or any portion of such excess payment or
reduction is thereafter recovered from such purchasing Lender or additional
costs are incurred, the purchase shall be rescinded and the purchase price
restored to the extent of such recovery or such additional costs, but without
interest. The Company agrees that any Lender so purchasing a participation from
another Lender pursuant to this Section may, to the fullest extent permitted by
law, exercise all its rights of payment (including the right of set-off) with
respect to such participation as fully as if such Lender were the direct
creditor of the Company in the amount of such participation.

     Section 2.20  Taxes.

          (a) Payments Free and Clear.  Any and all payments by the Company
     under this Agreement or any other Financing Document shall be made, in
     accordance with Section 2.13, free and clear of and without deduction for
     any and all present or future taxes, levies, imposts, deductions, charges
     or withholdings, and all liabilities with respect thereto, excluding, in
     the case of each Lender,  and the Administrative Agent, taxes imposed on
     its income, and franchise or similar taxes imposed on it, by (i) any
     jurisdiction (or political subdivision thereof) of which the Administrative
     Agent or such Lender, as the case may be, is a citizen or resident or in
     which such Lender has a permanent establishment (or is otherwise engaged in
     the active conduct of its banking business through an office or a branch)
     which is such Lender's applicable Lending Office, (ii) the jurisdiction (or
     any political 

                                       40
<PAGE>
 
     subdivision thereof) in which the Administrative Agent or such Lender is
     organized, or (iii) any jurisdiction (or political subdivision thereof) in
     which such Lender or the Administrative Agent is presently doing business
     which taxes are imposed solely as a result of doing business in such
     jurisdiction (all such non-excluded taxes, levies, imposts, deductions,
     charges, withholdings and liabilities so arising out of payments by the
     Company being hereinafter referred to as "Taxes"). If the Company shall be
     required by law to deduct any Taxes from or in respect of any sum payable
     hereunder to the Lenders or the Administrative Agent (i) the sum payable
     shall be increased by the amount necessary so that after making all
     required deductions (including deductions applicable to additional sums
     payable under this Section 2.20) such Lender or the Administrative Agent
     (as the case may be) shall receive an amount equal to the sum it would have
     received had no such deductions been made, (ii) the Company shall make such
     deductions and (iii) the Company shall pay the full amount deducted to the
     relevant taxing authority or other Governmental Authority in accordance
     with applicable law.

          (b) Other Taxes.  In addition, the Company agrees to pay any present
     or future stamp or documentary taxes or any other excise or property taxes,
     charges or similar levies that arise from any payment made hereunder or
     from the execution, delivery or registration of, or otherwise with respect
     to, this Agreement, any Assignment and Acceptance or any other Financing
     Document (hereinafter referred to as "Other Taxes").

          (c) Indemnification.  The Company will indemnify each Lender and the
     Administrative Agent for the full amount of Taxes and Other Taxes
     (including, but not limited to, any Taxes or Other Taxes imposed by any
     jurisdiction on amounts payable under this Section 2.20) paid by such
     Lender or the Administrative Agent (on their behalf or on behalf of any
     Lender), as the case may be, and any liability (including penalties,
     interest and expenses) arising therefrom or with respect thereto, whether
     or not such Taxes or Other Taxes were correctly or legally asserted.  Any
     payment pursuant to such indemnification shall be made within 30 days after
     the date any Lender or the Administrative Agent, as the case may be, makes
     written demand therefor.  If a Lender or the Administrative Agent shall
     become aware that it is entitled to claim a refund from a Governmental
     Authority in respect of Taxes or Other Taxes as to which it has been
     indemnified by the Company, or with respect to which the Company has paid
     additional amounts, pursuant to this Section 2.20, it shall promptly notify
     the Company of the availability of such claim and shall, within 30 days
     after receipt of a request by the Company, make a claim to such
     Governmental Authority for such refund at the Company's expense.  If a
     Lender or the Administrative Agent receives a refund in respect of any
     Taxes or Other Taxes with respect to which the Company has paid additional
     amounts pursuant to this Section 2.20, it shall within 30 days from the
     date of such receipt pay over such refund to the Company (but only to the
     extent of indemnity payments made, or additional amounts paid, by the
     Company under this Section 2.20 with respect to the Taxes or Other Taxes
     giving rise to such refund), net of all out-of-pocket expenses of such
     Lender or the Administrative Agent and without interest (other than
     interest paid by the relevant Governmental Authority with respect to such
     refund); provided, however, that the Company, upon the request of such
     Lender or the Administrative Agent, agrees to repay the amount paid over to
     the Company (plus penalties, interest or other charges payable to the
     relevant Governmental Authority) to such Lender or the Administrative Agent
     in the event such Lender or the Administrative Agent is required to repay
     such refund to such Governmental Authority.

                                       41
<PAGE>
 
          (d) Receipts.  Within 30 days after the date of any payment of Taxes
     or Other Taxes withheld by the Company in respect of any payment to any
     Lender or the Administrative Agent, the Company will furnish to the
     Administrative Agent the original or a certified copy of a receipt
     evidencing payment thereof.

          (e) Survival.  Without prejudice to the survival of any other
     agreement contained herein, the agreements and obligations contained in
     this Section 2.20 shall survive the payment in full of principal and
     interest hereunder.

          (f) Lender Representations and Agreements.  As of the date on which
     any Lender becomes a party hereto, such Lender represents that it is either
     (i) a corporation organized under the laws of the United States of America
     or any state thereof (ii) entitled to complete exemption from United States
     withholding tax imposed on or with respect to any payments, including fees,
     to be made to it pursuant to this Agreement or (iii) entitled to complete
     exemption from United States withholding tax on interest imposed on or with
     respect to any payments of interest to be made pursuant to this Agreement
     (A) under an applicable provision of a tax convention to which the United
     States of America is a party (B) because it is acting through a branch,
     agency or office in the United States of America and any payment to be
     received by it hereunder is effectively connected with a trade or business
     in the United States of America or (C) because it is a recipient of
     portfolio interest within the meaning of Section 871(h) or 881(c) of the
     Code.  Each Lender that is not a corporation organized under the laws of
     the United States of America or any state thereof shall:

               (x) provide to the Company and the Administrative Agent on or
          before the date of any payment by the Company hereunder, or on the
          date of its delivery of the Assignment and Acceptance pursuant to
          which it becomes a Lender, and at such other times as required by
          United States law or as the Company or the Administrative Agent shall
          reasonably request, two accurate and complete original signed copies
          of either (A) Internal Revenue Service Form 4224 (or successor form)
          certifying that all payments to be made to it hereunder will be
          effectively connected to a United States trade or business (the "Form
          4224 Certification"), or (B) Internal Revenue Service Form 1001 (or
          successor form) certifying that it is entitled to the benefit of a
          provision of a tax convention to which the United States of America is
          a party which completely exempts from United States withholding tax
          all payments to be made to it hereunder (the "Form 1001
          Certification").  In addition, each Lender agrees that if it
          previously filed a Form 4224 Certification it will deliver to the
          Company and the Administrative Agent a new Form 4224 Certification
          prior to the first payment date occurring in each of its subsequent
          taxable years (or such other date as may be required in compliance
          with applicable law); and if it previously filed a Form 1001
          Certification, it will deliver to the Company and the Administrative
          Agent a new certification prior to the first payment date falling in
          the third year following the previous filing of such certification (or
          such other date as may be required in compliance with applicable law);
          or

               (y)  in the case of any such Lender that is not a "bank" within
          the meaning of Section 881(c)(3)(A) of the Code, (i) furnish to the
          Company on or before the date of any payment by the Company, with a
          copy to the Administrative Agent, (A) a certificate 

                                       42
<PAGE>
 
          substantially in the form of Exhibit H (any such certificate a "U.S.
          Tax Compliance Certificate") and (B) two accurate and complete
          original signed copies of Internal Revenue Service Form W-8, or
          successor applicable form certifying to such Lender's legal
          entitlement at the date of such certificate to an exemption from U.S.
          withholding tax under the provisions of Section 881(c) of the Code
          with respect to payments of interest to be made under this Agreement,
          any Notes or other Financing Documents (and to deliver to the Company
          and the Administrative Agent two further copies of such form on or
          before the date it expires or becomes obsolete and after the
          occurrence of any event requiring a change in the most recently
          provided form and, if necessary, obtain any extensions of time
          reasonably requested by the Company or the Administrative Agent for
          filing and completing such forms) and (ii) agree, to the extent
          legally entitled to do so, upon reasonable request by the Company, to
          provide to the Company (for the benefit of the Company and the
          Administrative Agent) such other forms as may be reasonably required
          in order to establish the legal entitlement of such Lender to an
          exemption from withholding with respect to payments of interest under
          this Agreement, any Notes or other Financing Documents, provided that
          in determining the reasonableness of a request under this clause (iii)
          such Lender shall be entitled to consider the cost (to the extent
          unreimbursed by the Company) which would be imposed on such Lender of
          complying with such request.

     Each Lender also agrees to deliver to the Company and the Administrative
     Agent such other or supplemental forms as may at any time be required as a
     result of changes in applicable law or regulation in order to confirm or
     maintain in effect its entitlement to exemption from United States
     withholding tax on any payments hereunder, provided that the circumstances
     of the Lender at the relevant time and applicable laws permit it to do so.
     Except as provided immediately below, if a Lender is organized under the
     laws of a jurisdiction outside the United States of America, unless the
     Company and the Administrative Agent have received a Form 1001
     Certification, Form 4224 Certification, or an Internal Revenue Service Form
     W-8 and a U.S. Tax Compliance Certificate, as applicable, satisfactory to
     them indicating that all payments, or in the case of a Lender providing
     such forms as are required under Section 2.20(f)(y) hereof, all payments of
     interest, to be made to such Lender hereunder are not subject to United
     States withholding tax, the Company shall be entitled to withhold taxes
     from such payments at the applicable statutory rate, provided that such
     withholding shall not increase the amount of payments for the account of
     such Lender to be made by the Company pursuant to Subsection 2.20(a).  If a
     Lender determines, as a result of any change in either (i) applicable law,
     regulation or treaty, or in any official application thereof or (ii) its
     circumstances, that it is unable to submit any form or certificate that it
     is obligated to submit pursuant to this Section, or that it is required to
     withdraw or cancel any such form or certificate previously submitted, it
     shall promptly notify the Company and the Administrative Agent of such fact
     and the Company shall be entitled to withhold taxes from such payments at
     the applicable statutory rate, it being understood that such withholding
     shall increase the amount of payments for the account of such Lender to be
     made by the Company pursuant to Section 2.20(a).  Each Lender agrees to
     indemnify and hold the Administrative Agent harmless from any United States
     taxes, penalties, interest and other expenses, costs and losses incurred or
     payable by the Administrative Agent  (i) as a result of such Lender's
     failure to submit any form or certificate that it is required to provide
     pursuant to this Section or (ii) as a result of the Administrative Agent's
     reliance on any such form or certificate which such Lender has 

                                       43
<PAGE>
 
     provided to it pursuant to this Section. Each Person that shall become a
     Lender or a Participant pursuant to Section 8.07 shall, upon the
     effectiveness of the related transfer, be required to provide all of the
     forms, certifications and statements required pursuant to this Section,
     provided that in the case of a Participant the obligations of such
     Participant were it a Lender except that such Participant shall furnish all
     such required forms, certifications and statements to the Lender from which
     the related participation shall have been purchased.

          (g) Efforts to Avoid or Reduce.  Any Lender claiming any additional
     amounts payable pursuant to this Section 2.20 shall use reasonable efforts
     (consistent with legal and regulatory restrictions) to file any certificate
     or document requested by the Company or the Administrative Agent or to
     change the jurisdiction of its applicable Lending Office or to contest any
     tax imposed if the making of such a filing or change or contesting such tax
     would avoid the need for or reduce the amount of any such additional
     amounts that may thereafter accrue and would not, in the sole determination
     of such Lender, be otherwise disadvantageous to such Lender.

     Section 2.21 Pro Rata Treatment. Subject to the terms of the Intercreditor
Agreement and except as otherwise provided in Sections 2.10(a) and (b), each
payment on account of principal of and interest on any Loans shall be allocated
by the Administrative Agent pro rata according to the respective outstanding
principal amounts of such Loans then held by the Lenders. Subject to the terms
of the Intercreditor Agreement, all proceeds (including proceeds from the
realization upon the Collateral) received after acceleration of the maturity of
the Loans, shall be applied first to reimbursement of expenses and indemnities
provided for in this Agreement and the Financing Documents; second, to other
Lender Indebtedness until repaid in full pro rata to each Lender in accordance
with its Total Credit Percentage; and, third, to any other Person entitled to
receive such proceeds in accordance with applicable law.


                                  ARTICLE III

                        CONDITIONS TO BORROWINGS AND TO
                      PURCHASE, RENEWAL AND REARRANGEMENT
 
     The obligation of each Lender to make a Loan hereunder is subject to the
satisfaction of the following conditions:

     Section 3.01 Closing. The Company shall have delivered to the
Administrative Agent (unless waived by the Administrative Agent) at least three
Business Days' advance written notice of the proposed Effective Date, which
shall be a Business Day and the same day as the Closing Date, for the delivery
of all instruments, certificates and opinions referred to in Section 3.02 not
theretofore delivered.

     Section 3.02 Conditions Precedent to Loans. At the time of the making by
such Lender of its Loans hereunder, all obligations of the Company hereunder to
the Administrative Agent or any Lender incurred prior to such Loans, shall have
been paid in full, and the Administrative Agent shall have received the
following, each in form and substance reasonably satisfactory to the Agents and
the Lenders, with an original thereof for 

                                       44
<PAGE>
 
the Administrative Agent and with sufficient copies thereof for each Lender
(except that in the case of the Notes, the originals thereof will be delivered
to the respective Lenders):

          (a) Notes - A duly completed and executed Note for each Lender and in
     each case dated as of the Closing Date and payable to the order of such
     Lender.

          (b) Resolutions and Incumbency Certificates -

               (i) certified copies of the resolutions of the Boards of
          Directors of the Company, Holdco, and any of the Company's
          Subsidiaries that are parties to any Financing Document, dated, as to
          the Company,  as of the Closing Date, and as to Holdco and the
          Company's Subsidiaries, as of the Effective Date, and  approving, as
          appropriate, the Loans, the Notes, this Agreement and the other
          Financing Documents, and all other documents, if any, to which the
          Company, Holdco or such Subsidiary is a party and evidencing corporate
          authorization with respect to such documents;

               (ii) a certificate of the Secretary or an Assistant Secretary of
          the Company dated as of the Closing Date and certifying (A) the name,
          title and true signature of each officer of such Person authorized to
          execute the Notes, this Agreement, and the other Financing Documents
          to which it is a party, (B) the name, title and true signature of each
          officer of such Person authorized to provide the certifications
          required pursuant to this Agreement including, but not limited to,
          certifications required pursuant to Section 5.02, the Borrowing
          Request and (C) that attached thereto is a true and complete copy of
          the articles of incorporation and bylaws of the Company, as amended to
          date, and a recent good standing certificate; and

               (iii)  a certificate of the Secretary or an Assistant Secretary
          of Holdco and of each Subsidiary that is a party to any Financing
          Document, in each case, dated as of the Effective Date and certifying
          (x) the name, title and true signature of each officer of Holdco or
          such Subsidiary, as the case may be, authorized to execute each such
          Financing Document to which it is a party, and (y) that attached
          thereto is a true and complete copy of the articles of incorporation
          and bylaws of Holdco or such Subsidiary, as the case may be, as
          amended to date, and a recent good standing certificate for Holdco or
          such Subsidiary, as the case may be.

          (c) Opinions of Counsel - The following opinions of counsel, in each
     case addressed to each of the Agents and the Lenders and covering such
     other matters as any Administrative Agent or the Lenders may reasonably
     request:

               (i) Andrews & Kurth L.L.P., counsel to Holdco, the Company and
          the Subsidiary Guarantors substantially in the form of Exhibit D-1
          hereto; and

               (ii) Local counsel to the Company dated as of the Closing Date
          and substantially in the form of Exhibits D-2 through D-4 as to the
          laws of Canada and the States of Georgia and Florida.

                                       45
<PAGE>
 
          (d) The Security Instruments and Guaranties -

               (i)  Security Agreement executed by Sterling Fibers substantially
          in the Form of Exhibit E-1 and dated as of the Closing Date;

               (ii) Santa Rosa Deed of Trust executed by Sterling Fibers
          substantially in the form of Exhibit E-2 and dated as of the Closing
          Date;

               (iii)  Limited Guaranty Agreement (Santa Rosa) executed by
          Sterling Fibers substantially in the form of Exhibit E-3 and dated as
          of the Closing Date;

               (iv) Collateral Assignment (Intercompany Loans and Accounts)
          executed by Sterling Fibers substantially in the form of Exhibit E-4
          dated as of the Closing Date;

               (v) Second Lien Deed of Trust executed by the Company
          substantially in the form of Exhibit E-5 dated as of the Closing Date;

               (vi) Guaranty Agreement dated as of the Closing Date executed by
          the Subsidiary Guarantors in favor of the Original Administrative
          Agent, the Administrative Agent, the Administrative Agent For Combined
          Lenders, the Documentation Agent, the Documentation Agent (as defined
          in the Original Credit Agreement),  the Issuing Banks (as defined in
          the Original Credit Agreement), and the Combined Lenders;

               (vii)  Subrogation and Contribution Agreement dated as of the
          Closing Date executed by the Company and the Subsidiary Guarantors;

               (viii)  Second Amendment and Supplement to Security Agreement
          dated as of the Closing Date executed by the Company, granting to the
          Administrative Agent For Combined Lenders a first priority security
          interest in all personal Property described therein, as security for
          the indebtedness defined therein as the "Obligations";

               (ix) First Amendment and Supplement to Security Agreements dated
          as of the Closing Date executed by each of the Subsidiary Guarantors,
          granting to the Administrative Agent For 

                                       46
<PAGE>
 
          Combined Lenders a first priority security interest in all personal
          Property described therein of each such Person, as security for the
          indebtedness respectively defined therein as the "Obligations";

               (x) Second Amendment and Supplement to Security Agreement
          (Pledge) dated as of the Closing Date executed by Holdco granting to
          the Administrative Agent For Combined Lenders a first priority
          security interest in 100% of the capital stock of the Company, as
          security for the Combined Lender Indebtedness;

               (xi) Second Amendment and Supplement to Security Agreement
          (Pledge) dated as of the Closing Date executed by the Company granting
          to the Administrative Agent For Combined Lenders a first priority
          security interest in 100% of the Capital Stock of the Company's
          directly owned U.S. Subsidiaries, as security for the Combined Lender
          Indebtedness;

               (xii)  First Amendment and Supplement to Security Agreement
          (Pledge) dated as of the Closing Date executed by Sterling Canada
          granting to the Administrative Agent For Combined Lenders a first
          priority security interest in 65% of the capital stock of Sterling
          Pulp and Sterling NRO and 100% of the capital stock of Sterling Pulp
          Chemicals US, Inc., as security for the Combined Lender Indebtedness;

               (xiii)  First Amendment and Supplement to Security Agreement
          (Pledge) dated as of the Closing Date executed by Sterling Pulp
          Chemicals US, Inc. granting to the Administrative Agent For Combined
          Lenders a first priority security interest in 100% of the capital
          stock of Sterling Pulp Chemicals, Inc., as security for the Combined
          Lender Indebtedness;

               (xiv)  First Amendment and Supplement to the Leasehold Deed to
          Secure Debt and Security Agreement covering the leasehold estate under
          the Valdosta Lease and dated as of the Closing Date;

               (xv) Second Amendment and Supplement to Collateral Assignment
          (Intercompany Loans and Accounts) dated as of the Closing Date
          executed by the Company, assigning to the Administrative Agent For
          Combined Lenders the Company's rights, titles and interests in and to
          all intercompany loans and accounts owing to the Company by any of its
          Subsidiaries, whether or not evidenced by promissory notes or other
          instruments, as security for the Combined Lender Indebtedness;

               (xvi)  First Amendment and Supplement to Collateral Assignments
          (Intercompany Loans and Accounts) dated as of the  Closing Date
          executed by each Subsidiary Guarantor, assigning to the Administrative
          Agent For Combined Lenders such Subsidiary Guarantor's rights, titles
          and interests in and to all intercompany loans and accounts owing to
          such Subsidiary Guarantor by the Company or any of its other
          Subsidiaries, whether or not evidenced by promissory notes or other
          instruments, as security for the Combined Lender Indebtedness;

               (xvii)  First Amendment and Supplement to Security Agreement
          (Pledge-Bonds) dated as of the Closing Date executed by Sterling
          Canada granting to the Administrative Agent For Combined Lenders a
          first priority security interest in the Valdosta Bonds;

               (xviii)  Second Amendment and Supplement to Collateral Assignment
          (ESOP) dated as of the Closing Date executed by the Company in favor
          of the Administrative Agent For Combined Lenders;

               (xix)  Security Agreement (ESOP) dated as of the Closing Date;

                                       47
<PAGE>
 
               (xx) Financing Statements, as appropriate, or other filings with
          Governmental Authorities to perfect the security interests created by
          the instruments delivered under clauses (i) through (xix) above;

               (xxi)  Stock certificates and corresponding stock powers to
          perfect the Administrative Agent For Combined Lenders' security in the
          capital stock pledged by the Company pursuant to the instrument
          delivered under clauses (xi), (xii), (xiii) and (xiv) above;

               (xxii)  all Property in which the Administrative Agent For
          Combined Lenders shall, at such time, be entitled to have a Lien
          pursuant to this Agreement or any other Financing Document shall have
          been physically delivered to the possession of the Administrative
          Agent For Combined Lenders to the extent that such possession is
          necessary for the purpose of perfecting such Lien in such Collateral;
          and

               (xxiii)  the Intercreditor Agreement dated as of the Closing
          Date.

          (e) Insurance.   A certificate of insurance coverage, dated as of the
     Effective Date evidencing that the Company and its Subsidiaries are
     carrying insurance in accordance with Section 5.01(e) hereof.  In addition,
     the Administrative Agent shall have received evidence satisfactory to the
     Administrative Agent that none of the improved real estate Collateral is
     situated in an area that has been identified by the Director of the Federal
     Emergency Management Agency (as to such Collateral located in the United
     States of America) or any other Governmental Authority as an area having
     special flood hazards.  Should it be determined, however, that any of the
     real estate Collateral is situated in an area identified as having special
     flood hazards, the Administrative Agent shall have received a copy of the
     applicable flood insurance policies (or policy applications), in form and
     substance satisfactory to the Required Lenders, indicating that the maximum
     limits of coverage have been obtained and that the full premium therefor
     has been paid in full.

          (f) Title Insurance; Survey.  Mortgagee's Policy of Title Insurance in
     form and substance satisfactory to the Administrative Agent For Combined
     Lenders insuring the Lien on  the Santa Rosa Plant in Santa Rosa County,
     Florida granted pursuant to the Santa Rosa Deed of Trust in the amount of
     $14,500,000 and a current survey covering the Santa Rosa Plant.

          (g) Consummation of AFB Acquisition.  The AFB Acquisition shall have
     been consummated in accordance with the terms of the Purchase Agreement and
     the Purchase Agreement shall not have been amended or modified other than
     with express written consent of the Required Lenders (except for amendments
     that do not materially change the terms of the AFB Acquisition as
     contemplated in the Purchase Agreement as of December 23, 1996), subject
     only to the funding of the Loans.  All conditions precedent to the AFB
     Acquisition set forth in the Purchase Agreement shall have been satisfied
     and shall not have been amended, modified or waived since December 23, 1996
     without the express written consent of the Lenders.  All representations
     and warranties made by the Cytec Parties in the Purchase Agreement shall be
     true and correct as of the Effective Date in all material respects and
     shall not have been amended, modified or waived since the Closing Date
     without the express written consent of the Lenders.  All documents,
     instruments, agreements, transfers, 

                                       48
<PAGE>
 
     conveyances and bills of sale necessary for the AFB Acquisition shall be in
     form reasonably satisfactory to the Administrative Agent.

          (h) Appraisals.  Appraisals shall have been completed, at the expense
     of the Company, determining the value-in-use of the real and personal
     Property to be acquired in the AFB Acquisition.

          (i) Lien Searches.  Lien searches reflecting no prior Liens on the
     Collateral other than Liens set forth on Schedule 5.04(b).

          (j) Financial Statements and Projections.  The financial condition of
     the Company reflected in the financial information and projections of the
     Company that were delivered to the Lenders on or before January 6, 1997, by
     the Company have not changed in such a way as to materially and adversely
     affect the prospects of the Company or otherwise cause or result in a
     Material Adverse Effect (after giving effect to the AFB Acquisition).

          (k) AFB Pilko Report.  A copy of the AFB Pilko Report and a
     certificate of the Company, dated as of the Effective Date, to the effect
     that to the Company's best knowledge, no relevant facts, conditions or
     circumstances pertaining to environmental claims or liabilities shall have
     arisen that would cause the AFB Pilko Report, if deemed to have been
     delivered on the Effective Date, to contain any material misstatement of
     fact, or any omission of any material fact necessary to make the AFB Pilko
     Report accurate, complete and not misleading, except to the extent that any
     such fact, condition, or circumstance could not reasonably be expected to
     have a Material Adverse Effect.

          (l) Albright Indemnity.  The Albright Indemnity shall remain legal,
     valid and binding in all respects as of the Effective Date.

          (m) Additional Equity.  Evidence of the receipt by Holdco of at least
     $10,000,000 of new common equity comprised of (i) at least $9,700,000 of
     additional cash equity (and contributed by Holdco to the Company and
     contributed or loaned by the Company to Sterling Fibers of such cash
     equity) and (ii) up to $300,000 of Equity Notes, in each case on terms and
     conditions satisfactory to the Administrative Agent.

          (n) Issuance of Preferred Stock.  Evidence satisfactory to the
     Administrative Agent of the issuance by Holdco of 100,000 shares of
     Preferred Stock to Cytec Industries on terms and conditions as set forth in
     Exhibit C.

          (o) Amendment to Original Credit Agreement.  An executed copy of the
     First Amendment to Credit Agreement in form and substance satisfactory to
     the Administrative Agent.

          (p) Conditions to Funding Under the Original Credit Agreement.  A
     certificate from the Company certifying that the conditions precedent set
     forth in Section 3.03(a), (b) and (c) of the Original Credit Agreement are
     satisfied as of the Effective Date.

                                       49
<PAGE>
 
          (q) Annual Budget.  A copy of the annual budget of the Company and its
     Subsidiaries (consolidating on the basis of the principal lines of business
     of the Company and its Subsidiaries) setting forth in reasonable detail the
     projected revenues and expenses of the Company for the Fiscal Year ending
     on September 30, 1997 (which budget does not include provision for the AFB
     Acquisition).

          (r) No Default.  Both before and after giving effect to the Loans and
     the proposed use of proceeds thereof, there shall exist no Default;

          (s) Representations and Warranties.  Both before and after giving
     effect to the Loans and the proposed use of proceeds thereof, all
     representations and warranties contained herein and in the other Financing
     Documents executed and delivered on or after the date hereof shall be true
     and correct in all material respects with the same effect as though such
     representations and warranties had been made on and as of the date of such
     Loan (unless such representation and warranty is expressly limited to an
     earlier date or is no longer true and correct solely as a result of
     transactions not prohibited by the Financing Documents); and

          (t) Documentation.  The Administrative Agent shall have received such
     other documents as the Administrative Agent (or any Lender acting through
     the Administrative Agent) may reasonably request, all in form and substance
     reasonably satisfactory to the Administrative Agent.

     The Borrowing Request submitted by the Company, and the acceptance by the
Company of the proceeds of such Borrowing (but not including continuations or
conversions pursuant to Section 2.11), shall constitute a representation and
warranty by the Company, as of the date of such Borrowing, that the conditions
specified in Subsections 3.02(p) and (r) have been satisfied.


                                  ARTICLE IV

                        REPRESENTATIONS AND WARRANTIES

     In order to induce the Lenders to enter into this Agreement, the Company
represents and warrants to the Lenders (which representations and warranties (i)
will survive the delivery of the Notes and (ii) made by the Company as of the
Closing Date are made assuming that the AFB Acquisition had occurred on or
before the Closing Date) that:

     Section 4.01 Corporate Existence. The Company and each of its Subsidiaries
are corporations duly organized, legally existing and in good standing under the
laws of the jurisdictions in which they are incorporated and are duly qualified
as foreign corporations in all jurisdictions wherein the Property owned or the
business transacted by them makes such qualification necessary, except where the
failure to be so qualified would not have a Material Adverse Effect.

     Section 4.02 Corporate Power and Authorization. The Company is authorized
and empowered to create and issue the Notes; the Company and each of its
Subsidiaries are duly authorized and empowered to 

                                       50
<PAGE>
 
execute, deliver and perform the Financing Documents, including this Agreement,
to which they respectively are parties; and all corporate action on the
Company's part requisite for the due creation and issuance of the Notes on the
Company's and each of its Subsidiaries' respective part requisite for the due
execution, delivery and performance of the Financing Documents, including this
Agreement, to which the Company and each of its Subsidiaries respectively are
parties has been duly and effectively taken.

     Section 4.03 Binding Obligations. This Agreement does, and the Notes and
other material Financing Documents to which the Company and each of its
Subsidiaries respectively are parties upon their creation, issuance, execution
and delivery will, when issued and delivered under this Agreement, constitute
legal, valid and binding obligations of the Company and each such Subsidiary
that is a party thereto, respectively, and will be enforceable in accordance
with their respective terms (except that enforcement may be subject to any
applicable bankruptcy, insolvency or similar laws generally affecting the
enforcement of creditors' rights and subject to the availability of equitable
remedies).

     Section 4.04 No Legal Bar or Resultant Lien. The execution, delivery and
performance of the Notes and the other Financing Documents, including this
Agreement, to which the Company or any of its Subsidiaries is a party do not and
will not violate or create a default under any provisions of the articles or
certificate of incorporation or bylaws of the Company or any of its
Subsidiaries, or any contract, agreement, instrument or Governmental Requirement
to which the Company or any of its Subsidiaries is subject, or result in the
creation or imposition of any Lien upon any Properties of the Company or any of
its Subsidiaries, other than those violations and defaults that would not have a
Material Adverse Effect upon the Company's or such Subsidiaries' use of such
Properties or those permitted by this Agreement.

     Section 4.05 No Consent. The Company's and each of its Subsidiaries'
respective execution, delivery and performance of the Notes and the other
Financing Documents, including this Agreement, to which the Company and each
such Subsidiary respectively are parties, and the consummation of the AFB
Acquisition, do not require notice to or filing or registration with, or the
authorization, consent or approval of or other action by any other Person,
including, but not limited to, any Governmental Authority, except those obtained
or made or where the failure to do so could not reasonably be expected to have a
Material Adverse Effect.

                                       51
<PAGE>
 
     Section 4.06  Financial Information.

          (a) Audited Financial Statements.  The audited consolidated balance
     sheets of the Company and its Subsidiaries as of September 30, 1995 and
     1996, and the related audited consolidated statements of income, retained
     earnings and cash flows for the years then ended, including in each case
     the related schedules and notes, reported on by, in the case of the 1995
     financial statements, Arthur Andersen LLP, and in the case of the 1996
     financial statements, Deloitte & Touche LLP, true copies of which have been
     previously delivered to each of the Lenders, fairly present the
     consolidated financial condition of the Company and its Subsidiaries as of
     the dates thereof and the consolidated results of operations for such
     periods, in accordance with GAAP applied on a consistent basis.

          (b) No Material Adverse Effect.  Since September 30, 1995, there has
     been no event or occurrence that could reasonably be expected to have a
     Material Adverse Effect.

     Section 4.07 Investments and Guaranties. Neither the Company nor any of its
Subsidiaries has made investments in or advances to any Person or guaranties of
the obligations of any Person that is not a Subsidiary of the Company, except
those permitted by Section 5.04, reflected in the Financial Statements or
described in Schedule 4.07.

     Section 4.08 Litigation. Except as set forth in Schedule 4.08, there is no
material action, suit or proceeding, or any material governmental investigation
or any arbitration, in each case pending or, to the knowledge of the Company,
threatened against the Company or any of its Subsidiaries or any material
Property of any thereof before any court or arbitrator or any Governmental
Authority. There is no action, suit or proceeding, or any governmental
investigation or any arbitration, in each case pending or, to the knowledge of
the Company, threatened against the Company or any of its Subsidiaries or any
material Property of any thereof before any court or arbitrator or any
Governmental Authority which (i) challenges the validity of this Agreement, any
Note, the Subsidiary Guaranty or any of the other Financing Documents or (ii)
could reasonably be expected to have a Material Adverse Effect.

     Section 4.09 Use of Proceeds. The Company will use the proceeds of the
Loans only for the purposes specified in the Introductory Statement to this
Agreement. Neither the Company nor any of its Subsidiaries is engaged
principally, or as one of its important activities, in the business of extending
credit for the purpose, whether immediate, incidental or ultimate, of buying or
carrying Margin Stock (within the meaning of Regulations, G, U or X) and no part
of the proceeds of any Loan hereunder will be used to buy or carry any Margin
Stock in violation of Regulation G, U, or X. Neither the Company nor any Person
acting on behalf of the Company has taken or will take any action which could
reasonably be expected to cause the Notes or any of the Financing Documents,
including this Agreement, to violate Regulations G, U or X or any other
regulation of the Board of Governors of the Federal Reserve System, in each case
as now in effect or as the same may hereinafter be in effect.

                                       52
<PAGE>
 
     Section 4.10  Employee Benefits.

          (a) Except as could not reasonably be expected to have a Material
     Adverse Effect (i) the Company, its Subsidiaries and each ERISA Affiliate
     have complied in all material respects with all applicable laws regarding
     each Plan (including, where applicable, ERISA, the Code, the Pension
     Benefits Act (Ontario), and the Income Tax Act (Canada)); (ii) each Plan
     is, and has been, maintained and administered in substantial compliance
     with its terms, applicable collective bargaining agreements, and all
     applicable laws  (including, where applicable, ERISA, the Code, the Pension
     Benefits Act (Ontario), and the Income Tax Act (Canada)); and (iii) no act,
     omission or transaction has occurred which could result in imposition on
     the Company, any Subsidiary of the Company or any ERISA Affiliate (whether
     directly or indirectly) of (A) either a civil penalty assessed pursuant to
     Subsections (c), (i) or (l) of Section 502 of ERISA or a tax imposed
     pursuant to Chapter 43 of Subtitle D of the Code or (B) breach of fiduciary
     duty liability damages under Section 409 of ERISA.

          (b) There exists no material outstanding liability of the Company, any
     of its Subsidiaries or any ERISA Affiliate with respect to any Plan that
     has been terminated.  No material liability to the PBGC (other than for the
     payment of current premiums which are not past due) by the Company, any
     Subsidiary of the Company or any ERISA Affiliate has been or is expected by
     the Company, any Subsidiary of the Company or any ERISA Affiliate to be
     incurred with respect to any Plan.  No ERISA Termination Event with respect
     to any Plan has occurred or is reasonably expected to occur  (other than an
     event described in clause (i) or (ii) of the definition of "ERISA
     Termination Event" that could not reasonably be expected to have a Material
     Adverse Effect).

          (c) Full payment when due has been made of all amounts which the
     Company, any of its Subsidiaries or any ERISA Affiliate is required under
     the terms of each Plan or applicable law to have paid as contributions to
     such Plan (excluding any nonpayment involving an amount that is not
     material), and no accumulated funding deficiency (as defined in Section 302
     of ERISA and Section 412 of the Code), whether or not waived, exists with
     respect to any Plan.

          (d) With respect to any Plan that is a pension plan subject to the
     Pension Benefits Act (Ontario), such Plan is fully funded, on a going
     concern basis, in accordance with its terms and regulatory requirements as
     outlined by the Pension Benefits Act (Ontario), administrative requirements
     of the Pension Commission of Ontario and the most recent actuarial report
     filed with the Pension Commission of Ontario in respect of such Plan except
     to the extent any failure to do so could not reasonably be expected to have
     a Material Adverse Effect.

          (e) The actuarial present value of the benefit liabilities (computed
     on an accumulated benefit obligation basis in accordance with GAAP) under
     all Plans in the aggregate that are subject to Title IV of ERISA does not,
     as of the end of the most recently ended fiscal year of such Plans, exceed
     the current value of the assets of all Plans in the aggregate that are
     allocable to such benefit liabilities by (i) an amount that could
     reasonably be expected to cause a Material Adverse Effect, if such excess
     is the result of a change in market conditions, and (ii) more than
     $10,000,000 if such excess is for any other reason.  The term "actuarial
     present value of the benefit liabilities" shall have the meaning specified
     in Section 4041 of ERISA.

                                       53
<PAGE>
 
          (f) Except as expressly permitted pursuant to Sections 5.04(i)(v) and
     (vi), neither the Company, any Subsidiary of the Company nor any ERISA
     Affiliate sponsors, maintains or contributes to, or has at any time in the
     preceding six-year period sponsored, maintained or contributed to, (i) any
     "multiemployer plan" (as defined in Section 3(37) or 4001(a)(3) of ERISA)
     or (ii) any "multi-employer pension plan" (as defined in the Pension
     Benefits Act (Ontario)).

          (g) Neither the Company, any Subsidiary of the Company nor any ERISA
     Affiliate is required to provide security to a Plan pursuant to Section
     401(a)(29) of the Code.

          (h) The execution and delivery of the Financing Documents and the
     Secondary ESOP Loan Documents, the consummation of the Transactions and the
     transactions provided for in and contemplated by the Secondary ESOP Loan
     Documents, and the lending of funds pursuant to the provisions of the
     Financing Documents and the Secondary ESOP Loan Documents will not involve
     or give rise to any non-exempt prohibited transaction within the meaning of
     Section 406 of ERISA or Section 4975 of the Code.

     Section 4.11 Taxes; Governmental Charges. The Company and its Subsidiaries
have filed all tax returns and reports required to be filed and have paid all
taxes, assessments, fees and other governmental charges levied upon any of them
or upon any of their respective Properties or income which are due and payable,
including interest and penalties, except where failure to so pay or file would
not have a Material Adverse Effect, or have provided adequate reserves for the
payment thereof if required in accordance with GAAP for the payment thereof,
except such interest and penalties as are being contested in good faith by
appropriate actions or proceedings and for which adequate reserves for the
payment thereof as required by GAAP have been provided.

     Section 4.12 Titles, etc. The Company and its Subsidiaries have
indefeasible title to their respective material (individually or in the
aggregate) Properties, and with respect to leased Properties, indefeasible title
to the leasehold estate with respect thereto, pursuant to valid and enforceable
leases, free and clear of all Liens except (i) Liens disclosed to the Lenders in
Schedule 4.12, (ii) in addition to the Liens disclosed in Schedule 4.12, other
Liens and minor irregularities in title which do not materially interfere with
the occupation, use and enjoyment by the Company or any Subsidiary of the
Company of any of their respective Properties in the normal course of business
as presently conducted or materially impair the value thereof for such business,
and (iii) Liens otherwise permitted or contemplated by this Agreement or the
other Financing Documents.

     Section 4.13 Defaults. Neither the Company nor any of its Subsidiaries is
in default nor has any event or circumstance occurred which, but for the passage
of time or the giving of notice, or both, would constitute a default (in any
respect that would have a Material Adverse Effect) under any loan or credit
agreement, indenture, mortgage, deed of trust, security agreement or other
instrument or agreement evidencing or pertaining to any Indebtedness of the
Company or any of its Subsidiaries, or under any material agreement or
instrument to which the Company or any of its Subsidiaries is a party or by
which the Company or any of its Subsidiaries is bound, except as disclosed to
the Lenders in Schedule 4.13. No Default hereunder has occurred and is
continuing.

                                       54
<PAGE>
 
     Section 4.14 Casualties; Taking of Properties. Since September 30, 1995,
neither the business nor the Properties of the Company or any of its
Subsidiaries have been affected in a manner that has had or would have a
Material Adverse Effect as a result of any fire, explosion, earthquake, flood,
drought, windstorm, accident, strike or other labor disturbance, embargo,
requisition or taking of Property or cancellation of contracts, permits or
concessions by any domestic or foreign government or any agency thereof, riot,
activities of armed forces or acts of God or of any public enemy.

     Section 4.15 Compliance with the Law. Neither the Company nor any of its
Subsidiaries:

          (a) is in violation of any Governmental Requirement; and

          (b) has failed to obtain any license, permit, right-of-way, franchise
     or other right or governmental authorization necessary to the ownership of
     any of their respective Properties or the conduct of their respective
     business;

which violation or failure would have (in the event that such a violation or
failure were asserted by any Person through appropriate action) a Material
Adverse Effect.

     Section 4.16 No Material Misstatements. No written information, exhibit,
schedule or report prepared by or on behalf of the Company and furnished to the
Agent or the Lenders by or at the direction of the Company or any of its
Subsidiaries in connection with the negotiation of this Agreement contained any
material misstatement of fact or, when such statement is considered with all
other written statements furnished to the Lenders in that connection, omitted to
state a material fact or any fact necessary to make the statement contained
therein not misleading; provided, that, the financial information with respect
to the Company's projections, copies of which have been furnished to each Lender
prior to the Closing Date, were prepared in good faith on the basis of the
assumptions stated therein, which assumptions were believed by the Company to be
reasonable in all material respects at the time made.

     Section 4.17 Investment Company Act. The Company is not an "investment
company" or a company "controlled" by an "investment company" that is
incorporated in or organized under the laws of the United States or any "State,"
as those terms are defined in the Investment Company Act of 1940, as amended.
The execution and delivery by the Company and its Subsidiaries of this Agreement
and the other Financing Documents to which they respectively are parties and
their respective performance of the obligations provided for therein, will not
result in a violation of the Investment Company Act of 1940, as amended.

     Section 4.18 Public Utility Holding Company Act. The Company is not a
"holding company," or a "subsidiary company" of a "holding company," or an
"affiliate" of a "holding company" or of a "subsidiary company" of a "holding
company," or a "public utility" within the meaning of the Public Utility Holding
Company Act of 1935, as amended.

     Section 4.19 Subsidiaries. As of the Effective Date, the Company has no
Subsidiaries except those shown in Schedule 4.19 hereto, which schedule is
complete and accurate. The Company owns, either directly or indirectly, 100% of
all stock of the Subsidiaries listed in such Schedule.

                                       55
<PAGE>
 
     Section 4.20 Insurance. All policies of fire, liability, workmen's
compensation, casualty, flood, business interruption and other forms of
insurance owned or held by the Company, and each of its Subsidiaries are
sufficient for compliance with all requirements of law and of all agreements to
which the Company or any of its Subsidiaries is a party; are valid, outstanding
and enforceable policies; provide adequate insurance coverage in at least such
amounts and against at least such risks (but including in any event public
liability) as are usually insured against in the same general area by companies
engaged in the same or a similar business for the assets and operations of the
Company and each of its Subsidiaries; and will not in any way be affected by, or
terminate or lapse by reason of, the transactions contemplated by this
Agreement. All such material policies are in full force and effect, all premiums
with respect thereto have been paid in accordance with their respective terms,
and no notice of cancellation or termination has been received with respect to
any such policy. Neither the Company nor any of its Subsidiaries maintains any
formalized self-insurance program with respect to its assets or operations or
material risks with respect thereto in excess of $5,000,000 in the aggregate.
The certificate of insurance delivered to the Lenders pursuant to Section
3.02(e) contains an accurate and complete description of all material policies
of insurance owned or held by the Company and each of its Subsidiaries on the
Effective Date.

     Section 4.21 Environmental Matters. Except as disclosed to the Lenders in
the AFB Pilko Report or the Original Pilko Report:

          (a) Environmental Laws, etc.  Neither any Property of the Company or
     its Subsidiaries nor the operations conducted thereon violate any
     applicable order of any court or Governmental Authority or Environmental
     Laws, which violation could reasonably be expected to have a Material
     Adverse Effect or which could reasonably be expected to result in remedial
     obligations having a Material Adverse Effect assuming disclosure to the
     applicable Governmental Authority of all relevant facts, conditions and
     circumstances, if any, pertaining to the relevant Property.

          (b) No Litigation.  Without limitation of Subsection (a) above, no
     Property of the Company or its Subsidiaries nor the operations currently
     conducted thereon or by any prior owner or operator of such Property or
     operation, are in violation of or subject to any existing, pending or
     threatened action, suit, investigation, inquiry or proceeding by or before
     any court or Governmental Authority or to any remedial obligations under
     Environmental Laws, which violation, action, suit, investigation, inquiry
     or proceeding could reasonably be expected to have a Material Adverse
     Effect or which could reasonably be expected to result in remedial
     obligations having a Material Adverse Effect assuming disclosure to the
     applicable Governmental Authority of all relevant facts, conditions and
     circumstances, if any, pertaining to the relevant Property.

          (c) Notices, Permits, etc.  All notices, permits, licenses or similar
     authorizations, if any, required to be obtained or filed by the Company or
     its Subsidiaries in connection with the operation or use of any and all
     Property of the Company or its Subsidiaries, including but not limited to
     past or present treatment, storage, disposal or release of a hazardous
     substance or solid waste into the environment, have been duly obtained or
     filed except to the extent the failure to obtain or file such notices,
     permits, licenses or similar authorizations could not reasonably be
     expected to have a Material Adverse Effect or which could reasonably be
     expected to result in remedial obligations having a 

                                       56
<PAGE>
 
     Material Adverse Effect assuming disclosure to the applicable Governmental
     Authority of all relevant facts, conditions and circumstances, if any,
     pertaining to the relevant Property.

          (d) Hazardous Substances Carriers.  All hazardous substances or solid
     waste generated at any and all Property of the Company or its Subsidiaries
     have in the past been transported, treated and disposed of only by carriers
     maintaining valid permits under RCRA and any other Environmental Law,
     except to the extent the failure to have such substances or waste
     transported, treated or disposed by such carriers could not reasonably be
     expected to have a Material Adverse Effect, and only at treatment, storage
     and disposal facilities maintaining valid permits under RCRA and any other
     Environmental Law, which carriers and facilities have been and are
     operating in compliance with such permits, except to the extent the failure
     to have such substances or waste treated, stored or disposed at such
     facilities, or the failure of such carriers or facilities to so operate,
     could not reasonably be expected to have a Material Adverse Effect or which
     could reasonably be expected to result in remedial obligations having a
     Material Adverse Effect assuming disclosure to the applicable Governmental
     Authority of all relevant facts, conditions and circumstances, if any,
     pertaining to the relevant Property.

          (e) Hazardous Substances Disposal.  The Company and its Subsidiaries
     have taken all reasonable steps necessary to determine and have determined
     that no hazardous substances or solid waste have been disposed of or
     otherwise released and there has been no threatened release of any
     hazardous substances on or to any Property of the Company or its
     Subsidiaries except in compliance with Environmental Laws, except to the
     extent the failure to do so could not reasonably be expected to have a
     Material Adverse Effect or which could reasonably be expected to result in
     remedial obligations having a Material Adverse Effect assuming disclosure
     to the applicable Governmental Authority of all relevant facts, conditions
     and circumstances, if any, pertaining to the relevant Property.

          (f) No Contingent Liability.  The Company and its Subsidiaries have no
     material contingent liability in connection with any release or threatened
     release of any hazardous substance or solid waste into the environment
     other than such contingent liabilities at any one time and from time to
     time which could reasonably be expected to exceed $10,000,000 in excess of
     applicable insurance coverage and for which adequate reserves for the
     payment thereof as required by GAAP have not been provided, or which could
     reasonably be expected to result in remedial obligations having a Material
     Adverse Effect assuming disclosure to the applicable Governmental Authority
     of all relevant facts, conditions and circumstances, if any, pertaining to
     such release or threatened release.

     Section 4.22 Solvency. The Company and its Subsidiaries, taken as a whole,
and the Company and each of its material Subsidiaries are Solvent, both before
and after taking into account the AFB Acquisition.

     Section 4.23 Material Contracts. As of the Effective Date, each of the
Material Contracts is in full force and effect. Neither the Company nor any of
its Subsidiaries is in default under or in breach of any term or condition of
any Material Contract that would have a Material Adverse Effect, nor is it aware
of any default 

                                       57
<PAGE>
 
under or breach of any term or condition of any Material Contract by any other
party thereto that would have a Material Adverse Effect.

     Section 4.24 Employee Matters. Except as set forth on Schedule 4.24, as of
the Effective Date, none of the Company or its Subsidiaries, or any of their
respective employees, is subject to any collective bargaining agreement. There
are no strikes, slowdowns, work stoppages or controversies pending or, to the
best knowledge of the Company, threatened against the Company or its
Subsidiaries, or their respective employees, which could reasonably be expected
to have, either individually or in the aggregate, a Material Adverse Effect.
Except as set forth in Schedule 4.24, none of the Company nor any of its
Subsidiaries is subject to an employment contract.

     Section 4.25 Senior Indebtedness. The Lender Indebtedness constitutes
"Senior Debt" of the Company under and as defined in the Senior Subordinated
Notes Indenture.


                                 ARTICLE V

                                 COVENANTS

     Section 5.01 Certain Affirmative Covenants. So long as any Lender has any
Commitment hereunder or any Loan remains unpaid, the Company will at all times
comply with the following covenants:

          (a) Maintenance and Compliance, etc. The Company will and will cause
     each of its Subsidiaries to (i) except as permitted by Section 5.04(c),
     preserve and maintain its corporate existence, and (ii) except where
     failure to do so could not reasonably be expected to have a Material
     Adverse Effect, observe and comply with all Governmental Requirements.

          (b) Payment of Taxes and Claims, etc. The Company will pay, and cause
     each of its Subsidiaries to pay, (i) all material taxes, assessments and
     governmental charges imposed upon it or upon its Property, and (ii) all
     material claims (including, but not limited to, claims for labor,
     materials, supplies or services) which could reasonably be expected, if
     unpaid, to become a Lien upon its Property, unless, in each case, the
     validity or amount thereof is being contested in good faith by appropriate
     action or proceedings and the Company has established adequate reserves in
     accordance with GAAP with respect thereto.

          (c) Further Assurances. The Company will and will cause each of its
     Subsidiaries to cure promptly any defects in the creation and issuance of
     the Notes, and the execution and delivery of the Financing Documents,
     including this Agreement. The Company at its expense will, as promptly as
     practical, execute and deliver to the Administrative Agent or the
     Administrative Agent For Combined Lenders, as applicable, upon request all
     such other and further documents, agreements and instruments (or cause any
     of its Subsidiaries to take such action) in compliance with or performance
     of the covenants and agreements of the Company or any of its Subsidiaries
     in the Financing Documents, including this Agreement, or to further
     evidence and more fully describe the Collateral, or to correct any
     omissions in the Financing Documents, or more fully to state the security
     obligations set out 

                                       58
<PAGE>
 
     herein or in any of the Financing Documents, or to perfect, protect or
     preserve any Liens created pursuant to any of the Financing Documents, or
     to make any recordings, to file any notices, or obtain any consents, all as
     may be necessary or appropriate in connection therewith.

          (d) Performance of Obligations. The Company will pay the Notes
     according to the reading, tenor and effect thereof; and the Company will do
     and perform every act and discharge all of the obligations provided to be
     performed and discharged by the Company under the Financing Documents,
     including this Agreement, at the time or times and in the manner specified,
     and cause each of its Subsidiaries to take such action with respect to
     their obligations to be performed and discharged under the Financing
     Documents to which they respectively are parties.

          (e) Insurance. The Company will and will cause each of its
     Subsidiaries to maintain or cause to be maintained, with financially sound
     and reputable insurers, insurance with respect to their respective
     Properties and business against such liabilities, casualties, risks and
     contingencies and in such types (including business interruption insurance
     and flood insurance) and amounts as is customary in the case of Persons
     engaged in the same or similar businesses and similarly situated and in
     accordance with any Governmental Requirement. In the case of any fire,
     accident or other casualty causing loss or damage to any Properties of the
     Company used in generating cash flow or required by applicable law, the
     proceeds of such policies in excess of $100,000 per occurrence shall be
     used to promptly repair or replace any such damaged Properties as required
     by applicable law, and otherwise shall be used in the Company's sole
     discretion, (i) to reasonably promptly repair or replace the damaged
     Property, (ii) to prepay the Loans in accordance with Section 2.10(b), or
     (iii) to reinvest in other Properties that, in the good faith judgment of
     the Company, meet the Company's capital investment criteria. The Company
     will obtain endorsements to the policies pertaining to all physical
     Properties in which the Administrative Agent For Combined Lenders or the
     Lenders shall have a Lien under the Financing Documents, naming the
     Administrative Agent For Combined Lenders as a loss payee and containing
     provisions that such policies will not be cancelled without 30 days prior
     written notice having been given by the insurance company to the
     Administrative Agent.

          (f) Accounts and Records. The Company will keep and will cause each of
     its Subsidiaries to keep proper books of record and account in accordance
     with GAAP.

          (g) Right of Inspection. The Company will permit and will cause each
     of its Subsidiaries to permit any officer, employee or agent of the
     Administrative Agent (and during the continuance of any Default, any of the
     Lenders) to visit and inspect any of the Properties of the Company or any
     of its Subsidiaries, examine the Company's or any such Subsidiary's books
     of record and accounts, take copies and extracts therefrom, and discuss the
     affairs, finances and accounts of the Company or any of its Subsidiaries
     with the Company's or such Subsidiary's officers, accountants and auditors,
     as often and all at such reasonable times during normal business hours as
     may be reasonably requested by the Administrative Agent or any of the
     Lenders.

          (h) Operation and Maintenance of Property. The Company will, and will
     cause each of its Subsidiaries to, operate its Properties or cause its
     Properties to be operated and maintained (i) in accordance with prudent
     industry practice in all material 

                                       59
<PAGE>
 
     respects and in compliance in all material respects with the terms and
     provisions of all applicable leases, contracts and agreements and (ii)
     except where the noncompliance therewith could not reasonably be expected
     to cause or result in a Material Adverse Effect, in compliance with all
     applicable laws of the jurisdiction in which such Properties may be
     situated, and all applicable laws, rules and regulations of every other
     Governmental Authority from time to time constituted to regulate the
     ownership and operation of such Properties.

          (i) Additional Subsidiaries; Permitted Acquisitions; Additional Liens.

          (i)  If at any time after the Effective Date the Company or its
     Subsidiaries create or acquire any one or more additional Subsidiaries:

               (A)  the Company shall, and shall cause its U.S. Subsidiaries, to
          execute and deliver to the Administrative Agent, at the time of such
          new Subsidiary's creation or acquisition, additional pledge agreements
          granting a security interest in, (1) if such new Subsidiary is a U.S.
          Subsidiary, 100% of the capital stock of, and other equity interest
          in, such Subsidiary owned by the Company or any such U.S. Subsidiary,
          respectively, or (2) if such new Subsidiary is not a U.S. Subsidiary,
          65% or the capital stock of, and other equity interest in, such
          Subsidiary owned by the Company or any such U.S. Subsidiary,
          respectively, in each case in substantially the same form as the
          Pledge Agreement executed by the Company or its U.S. Subsidiaries, as
          applicable, in connection with this Agreement; and

               (B)  if such new Subsidiary is a wholly-owned (directly or
          indirectly) U.S. Subsidiary, the Company shall cause such new
          Subsidiary to execute and deliver to the Administrative Agent, at the
          time of such Subsidiary's creation or acquisition, (1) a guaranty
          agreement in substantially the same form as the Guaranty Agreement
          executed by the Subsidiary Guarantors in connection with this
          Agreement, and (2) appropriate mortgages and security agreements and
          the like covering such Subsidiary's Property;

     provided that, if such new Subsidiary does not have, but only for so long
     as such new Subsidiary does not have, assets of more than $50,000, the
     Company shall not be required to comply with this Section 5.01(i) with
     respect to such Subsidiary.

          (ii) If at any time after the Effective Date the Company or any of its
     Subsidiaries makes a Permitted Acquisition with respect to a Person that is
     not a Subsidiary, the Company shall, and shall cause its U.S. Subsidiaries,
     to execute and deliver to the Administrative Agent at the time of such
     Permitted Acquisition, additional pledge agreements granting a security
     interest in 100% of the capital stock of, or other equity interest in, such
     Person owned by the Company or any such U.S. Subsidiary, respectively, in
     each case in substantially the same form as the Pledge Agreement executed
     by the Company or its U.S. Subsidiaries, as applicable, in connection with
     this Agreement.

          (iii)  In connection with the execution and delivery of any guaranty
     agreement, pledge agreement,  mortgage, security agreement or similar
     agreement pursuant to this Section 5.01(i), the Company shall, or shall
     cause the relevant Subsidiary to, deliver to the Lenders such corporate
     resolutions, certificates, legal opinions and such other related documents
     as shall be reasonably 

                                       60
<PAGE>
 
     requested by the Required Lenders and consistent with the relevant forms
     and types thereof delivered on the Effective Date or as shall be otherwise
     reasonably acceptable to the Required Lenders. Each guaranty agreement,
     pledge agreement, mortgage, security agreement and the like delivered
     pursuant to this Section 5.01(i) shall be deemed to be a Security
     Instrument from and after the date of execution thereof.

     Section 5.02 Reporting Covenants. . So long as any Lender has any
Commitment hereunder or any Loan remains unpaid, the Company will furnish the
following to the Administrative Agent (which shall provide copies to each
Lender) and, in the case of Sections 5.02(a), (b), (d), (e), (g), (i), (j), (k)
and (l) to each of the Lenders:

          (a) Annual Financial Statements. . As soon as available and in any
     event within 90 days after the end of each Fiscal Year of the Company, a
     consolidated balance sheet of the Company and its Subsidiaries as at the
     end of such year and the related consolidated statements of income,
     retained earnings and cash flows of the Company and its Subsidiaries for
     such Fiscal Year, setting forth in each case in comparative form the
     figures for the previous Fiscal Year, all in reasonable detail and
     accompanied by a report thereon of independent public accountants of
     recognized national standing, which such report shall state that such
     consolidated financial statements present fairly the consolidated financial
     condition as at the end of such Fiscal Year, and the consolidated results
     of operations and cash flows for such Fiscal Year, of the Company and its
     Subsidiaries in accordance with GAAP, applied on a consistent basis. At the
     same time, a consolidating balance sheet of the Company and its
     Subsidiaries as at the end of such year and related consolidating
     statements of income and cash flows for such Fiscal Year (in each case
     consolidating on the basis of principal lines of business of the Company
     and its Subsidiaries), accompanied by a certification thereon of a
     Responsible Officer, stating that such consolidating financial statements
     form the basis of the Company's consolidated financial statements and are
     fairly stated in all material respects when considered in relation thereto.

          (b) Quarterly Financial Statements. As soon as available and in any
     event within 45 days after the end of each Fiscal Quarter of the Company, a
     consolidated balance sheet of the Company and its Subsidiaries as at the
     end of such quarter and the related consolidated statements of income,
     retained earnings and cash flows of the Company and its Subsidiaries for
     such Fiscal Quarter and for the portion of the Company's Fiscal Year ended
     at the end of such quarter, setting forth in each case in comparative form
     the figures for the corresponding quarter and the corresponding portion of
     the Company's previous Fiscal Year, all in reasonable detail and certified
     by a Responsible Officer that such financial statements are complete and
     correct and fairly present the consolidated financial condition as at the
     end of such Fiscal Quarter, and the consolidated results of operations and
     cash flows for such Fiscal Quarter and such portion of the Company's Fiscal
     Year, of the Company and its Subsidiaries in accordance with GAAP (subject
     to normal, year-end adjustments). At the same time, a consolidating balance
     sheet of the Company and its Subsidiaries at the end of such Fiscal Quarter
     and related consolidating statements of income and cash flows, for the
     portion of the Company's Fiscal Year ended at such quarter (in each case
     consolidating on the basis of principal lines of business of the Company
     and its Subsidiaries), accompanied by a certification from a Responsible
     Officer that such consolidating financial statements form the basis of the
     Company's consolidated financial statements and are fairly stated in all
     material respects when considered in relation thereto.

                                       61
<PAGE>
 
          (c) Monthly Financial Statements. As soon as available and in any
     event within 30 days after the end of each calendar month of the Company, a
     consolidated balance sheet of the Company and its Subsidiaries as at the
     end of such month and the related consolidated statements of income,
     retained earnings and cash flows of the Company and its Subsidiaries for
     such calendar month and for the portion of the Company's Fiscal Year ended
     at the end of such month, setting forth in each case in comparative form
     the figures for the corresponding month and the corresponding portion of
     the Company's previous Fiscal Year, all in reasonable detail and certified
     by a Responsible Officer that such financial statements are complete and
     correct and fairly present the consolidated financial condition as at the
     end of such calendar month, and the consolidated results of operations and
     cash flows for such calendar month and such portion of the Company's Fiscal
     Year, of the Company and its Subsidiaries in accordance with GAAP (subject
     to normal, year-end adjustments). At the same time, a consolidating balance
     sheet of the Company and its Subsidiaries at the end of such calendar month
     and related consolidating statements of income and cash flows, for the
     portion of the Company's Fiscal Year ended at such month (in each case
     consolidating on the basis of principal lines of business of the Company
     and its Subsidiaries), accompanied by a certification from a Responsible
     Officer that such consolidating financial statements form the basis of the
     Company's consolidated financial statements and are fairly stated in all
     material respects when considered in relation thereto.

          (d) No Default/Compliance Certificate. Together with the financial
     statements required pursuant to subsections (a) and (b) above, a
     certificate of the Company, signed by a Responsible Officer (i) stating
     that a review of such financial statements during the period covered
     thereby and of the activities of the Company and its Subsidiaries has been
     made under such Responsible Officer's supervision with a view to
     determining whether the Company and its Subsidiaries have fulfilled all of
     their obligations under this Agreement, the other Financing Documents, and
     the Notes; (ii) stating that the Company and its Subsidiaries have
     fulfilled their obligations under such instruments and that all
     representations made in this Agreement continue to be true and correct (or
     specifying the nature of any change), or if there shall be a Default or
     Event of Default, specifying the nature and status thereof and the
     Company's proposed response thereto; (iii) demonstrating in reasonable
     detail compliance (including, but not limited to, showing all material
     calculations) as at the end of such Fiscal Year or such Fiscal Quarter with
     Subsections 5.03(a), 5.03(b), 5.03(c), and 5.03(d); (iv) demonstrating in
     reasonable detail compliance (including, but not limited to, showing all
     material calculations) as at the end of the Fiscal Year with Sections
     5.04(o) and 5.04(e)(x), describing by category (utilizing the same
     categories as are used by the Company in its internal financial reports)
     any Permitted Acquisitions and any Capital Expenditures made by the Company
     or any Subsidiary as of the end of such Fiscal Year and attaching thereto a
     Notice of Designation of Retained Cash Flow Usage dated as of the end of
     the preceding Fiscal Quarter; and (v) containing or accompanied by such
     financial or other details, information and material as the Administrative
     Agent may reasonably request to evidence such compliance.

          (e) Management Letters. Together with the financial statements
     required pursuant to subsection (a) above, copies of each management letter
     issued to the Company by such accountants promptly following consideration
     or review by the Board of Directors of the Company, or any committee
     thereof (together with any response thereto prepared by the Company).

                                       62
<PAGE>
 
          (f) Title Information. Within a reasonable time after a request by the
     Administrative Agent, additional title information in form and substance
     acceptable to the Required Lenders as is reasonably necessary covering the
     Collateral so that the Lenders shall have received, together with the title
     information previously received by the Lenders, satisfactory title
     information covering all of the Collateral.

          (g) Events or Circumstances with respect to Collateral. Promptly after
     the occurrence of any event or circumstance concerning or changing any of
     the Collateral that would have a Material Adverse Effect, notice of such
     event or circumstance in reasonable detail.

          (h) Notice of Certain Events. Promptly after the Company learns of the
     receipt or occurrence of any of the following, a certificate of the
     Company, signed by a Responsible Officer specifying (i) any official notice
     of any violation, possible violation, non-compliance or possible non-
     compliance, or claim made by any Governmental Authority pertaining to all
     or any part of the Properties of the Company or any of its Subsidiaries
     which could reasonably be expected to have a Material Adverse Effect; (ii)
     any event which constitutes a Default or Event of Default, together with a
     detailed statement specifying the nature thereof and the steps being taken
     to cure such Default or Event of Default; (iii) the receipt of any notice
     from, or the taking of any other action by, the holder of any promissory
     note, debenture or other evidence of indebtedness in excess of $5,000,000
     of the Company or any of its Subsidiaries with respect to a claimed
     default, together with a detailed statement specifying the notice given or
     other action taken by such holder and the nature of the claimed default and
     what action the Company or its Subsidiary is taking or proposes to take
     with respect thereto; (iv) any default or noncompliance of any party to any
     of the Financing Documents with any of the terms and conditions thereof or
     any notice of termination or other proceedings or actions which could
     reasonably be expected to adversely affect any of the Financing Documents;
     (v) the creation, dissolution, merger or acquisition of any Subsidiary of
     the Company with material operations; (vi) any event or condition not
     previously disclosed to the Administrative Agent, which violates any
     Environmental Law and which could potentially, in the Company's reasonable
     judgment, have a Material Adverse Effect; (vii) any material amendment to,
     termination of, or material default under a Material Contract or any
     execution of, or material amendment to, termination of, or material default
     under, any material collective bargaining agreement; (viii) any event or
     condition which may reasonably be expected to have a Material Adverse
     Effect; (ix) the occurrence, with respect to Albright, of any of the events
     described in Section 6.08 or the failure of the Albright Indemnity to
     continue to be in full force and effect; or (x) the occurrence, with
     respect to any of the Cytec Parties, of any of the events described in
     Section 6.08 or the failure of the Cytec Indemnity to continue to be in
     full force and effect.

          (i) Shareholder Communications, Filings. Promptly upon the mailing,
     filing, or making thereof, copies of all registration statements, periodic
     reports and other documents (excluding the related exhibits except to the
     extent expressly requested by the Administrative Agent) filed by the
     Company with the Securities and Exchange Commission (or any successor
     thereto) or any national securities exchange.

                                       63
<PAGE>
 
          (j) Litigation. Promptly after the occurrence thereof, notice of the
     institution of or any material adverse development in any action, suit or
     proceeding or any governmental investigation or any arbitration, before any
     court or arbitrator or any governmental or administrative body, agency or
     official, against the Company, Holdco, or any Subsidiary Guarantor or any
     material Property of any thereof, in which the amount involved is material
     and is not covered by insurance or which could reasonably be expected to
     have a Material Adverse Effect.

          (k) ERISA. Promptly after (i) the Company's obtaining knowledge of the
     occurrence thereof, notice that an ERISA Termination Event or a "prohibited
     transaction," as such term is defined in Section 406 of ERISA or Section
     4975 of the Code, with respect to any Plan has occurred, which such notice
     shall specify the nature thereof, the Company's proposed response thereto
     (and, if applicable, the proposed response thereto of any Subsidiary of the
     Company and of any ERISA Affiliate) and, where known, any action taken or
     proposed by the Internal Revenue Service, the Department of Labor or the
     PBGC with respect thereto, (ii) the Company's obtaining knowledge thereof,
     copies of any notice of the PBGC's intention to terminate or to have a
     trustee appointed to administer any Plan, and (iii) the filing thereof with
     any Governmental Authority (if requested by the Administrative Agent),
     copies of each annual and other report (including applicable schedules)
     with respect to each Plan or any trust created thereunder.

          (l) Insurance Coverage. Upon request, a summary of the insurance
     coverages of the Company and its Subsidiaries in form and substance
     reasonably satisfactory to the Administrative Agent; upon renewal of any
     insurance policy, a copy of an insurance certificate summarizing the terms
     of such policy; and upon request of the Administrative Agent, copies of the
     applicable policies.

          (m) Annual Budget. Not later than the 60th day after each Fiscal Year
     end commencing September 30, 1997, an annual budget of the Company and it
     Subsidiaries (consolidating on the basis of principal lines of business of
     the Company and its Subsidiaries), reviewed by the Board of Directors of
     the Company, setting forth in reasonable detail, the projected revenues and
     expenses of the Company for the following Fiscal Year.

          (n) Excess Cash Flow Certificate. On or before the 100th day after
     each September 30th, commencing on September 30, 1997, the Company's
     preliminary calculation of its Excess Cash Flow for the Fiscal Year ended
     on such September 30th, in accordance with Section 2.10(a).

          (o) Other Information. With reasonable promptness, such other
     information about the business and affairs and financial condition of the
     Company or its Subsidiaries as the Administrative Agent may reasonably
     request from time to time.

     Section 5.03 Financial Covenants. So long as any Lender has any Commitment
hereunder or any Loan remains unpaid, the Company will, at all times:

          (a) Interest Coverage Ratio. Maintain an Interest Coverage Ratio of
     not less than the ratio for each Rolling Period indicated below:

                                       64
<PAGE>
 
               Each Rolling Period ending        Ratio
               --------------------------        -----

               December 31, 1996                  1.75
               March 31, 1997                     1.75
               June 30, 1997                      2.00
               September 30, 1997                 1.90
 
               Each Rolling Period during
               the Fiscal Years ending           Ratio
               -----------------------           -----

               September 30, 1998                 2.00
               September 30, 1999                 2.25
               September 30, 2000                 2.50
 

               Each Rolling Period          
               thereafter                        Ratio
               ----------                        -----
                                                  2.50

          (b) Current Ratio. Maintain a Current Ratio of not less than (i) 1.20
     to 1.00, from January 1, 1997, through September 30, 1998, and (ii) 1.25 to
     1.00 at all times after October 1, 1998.

          (c) Fixed Charge Coverage Ratio. Maintain a Fixed Charge Coverage
     Ratio of not less than the ratio for each Rolling Period indicated below:

              Each Rolling Period during
              the period beginning January 1,     
              1997 through September 30, 1998     Ratio
              -------------------------------     -----
                                                   1.05

               Each Rolling Period during
               the Fiscal Years ending            Ratio
               -----------------------            -----

               September 30, 1999                  1.10
               September 30, 2000                  1.15
               September 30, 2001                  1.20
 
               Each Rolling Period 
               thereafter                         Ratio
               ----------                         -----
                                                   1.20

          (d) Leverage Ratio. Maintain a Leverage Ratio of not greater than the
     ratio for each Rolling Period indicated below:

               Each Rolling Period ending         Ratio
               --------------------------         -----

               December 31, 1996                   5.25
               March 31, 1997                      5.60

                                       65
<PAGE>
 
               June 30, 1997                       5.60
               September 30, 1997                  5.25
               December 31, 1997                   5.00
               March 31, 1998                      5.00
               June 30, 1998                       4.75
               September 30, 1998                  4.75
 
               Each Rolling Period during
               the Fiscal Years ending           Ratio
               -----------------------           -----

               September 30, 1999                 4.50
               September 30, 2000                 4.00
               September 30, 2001                 3.50
               September 30, 2002                 3.00
 
               Each Rolling Period       
               thereafter                        Ratio
               ----------                        -----
                                                  3.00

The Company shall be deemed to be in compliance with the covenants contained in
this Section 5.03 at any time so long as the then most recent financial
statements prepared by the Company (for internal use or otherwise) and made
available to the Lenders show, or provide a basis for ascertaining, such
compliance and no Responsible Officer has obtained any information that causes
such Responsible Officer to reasonably conclude that the Company is not in
compliance with the covenants contained in this Section 5.03.

     Section 5.04 Certain Negative Covenants. So long as any Lender has any
Commitment hereunder or any Loan remains unpaid, the Company will not:

          (a) Indebtedness. Create, incur, assume or suffer to exist, or permit
     any of its Subsidiaries to create, incur, assume or suffer to exist, any
     Indebtedness, other than:

               (i) the Lender Indebtedness in the principal amount not to exceed
     $81,000,000 as reduced by all payments and prepayments thereof;

               (ii) Indebtedness outstanding on the date hereof which is set
          forth on Schedule 5.04(a), provided that any such Indebtedness
          indicated on Schedule 5.04(a) as "Indebtedness to be Repaid" shall
          have been repaid on or before the Effective Date;

               (iii)  accounts payable (for the deferred purchase price of
          Property or services) from time to time incurred in the ordinary
          course of business and guaranties by the Company or any Subsidiary in
          the ordinary course of business of any such obligations incurred by
          any other Subsidiary;

               (iv) Indebtedness owing by (A) the Company or a Subsidiary
          Guarantor to Canadian Subsidiaries not to exceed $5,000,000 in the
          aggregate, (B) Canadian Subsidiaries 

                                       66
<PAGE>
 
          to the Company or a Subsidiary Guarantor not to exceed (1)
          $120,000,000 in the aggregate provided that such Indebtedness may only
          arise from a transfer to one or more U.S. Subsidiaries or the Company
          of existing Indebtedness owing as of the Effective Date to one or more
          Canadian Subsidiaries and which does not under any circumstances
          involve consideration for such transfer other than an exchange of such
          Indebtedness for equity, plus (2) Indebtedness permitted pursuant to
          Section 5.04(e)(vii); (C) any Subsidiary Guarantor to the Company or
          any other Subsidiary Guarantor, (D) the Company to any Subsidiary
          Guarantor; and (E) any Canadian Subsidiary to any other Canadian
          Subsidiary;

               (v) obligations for current taxes, assessments and other
          governmental charges and taxes, assessments or other governmental
          charges which are not yet due or are being contested in good faith by
          appropriate action or proceeding promptly initiated and diligently
          conducted, if such reserve as shall be required by GAAP shall have
          been made therefor;

               (vi) Capital Lease Obligations not to exceed $1,000,000 at any
          one time;

               (vii)  Indebtedness not exceeding U.S. $15,000,000 under the
          Canadian Facility (and the "Bankers' Acceptances" provided for
          therein) so long as the documentation with respect thereto is
          reasonably satisfactory to the Administrative Agent.

               (viii)  Indebtedness evidenced by the Senior Subordinated Notes;

               (ix) Indebtedness owing pursuant to Hedge Agreements entered into
          in the ordinary course of business for the purpose of hedging against
          fluctuations in interest rates (on money borrowed by the Company),
          commodity prices and foreign exchange rates;

               (x) Indebtedness (other than short-term Indebtedness for borrowed
          money) created, incurred, assumed or guaranteed after the date hereof
          not otherwise permitted pursuant to this Subsection 5.04(a), provided
          that the aggregate outstanding principal amount of such Indebtedness,
          together with obligations (calculated based upon the net present value
          of all future lease payments at an assumed discount rate of 12%) in
          respect of the transactions described in Section 5.04(g), shall not
          exceed $20,000,000 at any one time outstanding; and

               (xi) Indebtedness not exceeding the principal amount of
          $454,000,000 under the Original Credit Agreement less the aggregate
          amount of permanent reductions of the Revolving Credit Commitments
          thereunder and payments or prepayments of the Original Term Loans.

          (b) Liens. Create, incur, assume or suffer to exist, or permit any of
     its Subsidiaries to create, incur, assume or suffer to exist, any Lien on
     any of its Property now owned or hereafter acquired to secure any
     Indebtedness of the Company, any Subsidiary or any other Person, other
     than:

                                       67
<PAGE>
 
               (i) Liens existing on the date hereof and set forth on Schedule
          5.04(b); provided that any such Liens indicated on Schedule 5.04(b) as
          "Liens to be Released" shall have been released of record within 10
          days after the Effective Date;

               (ii) Liens securing the Lender Indebtedness and Liens on Property
          of the Canadian Subsidiaries securing the Indebtedness under the
          Canadian Facility to the extent permitted pursuant to Section 5.04(a);

               (iii)  Liens for taxes, assessments or other governmental charges
          or levies not yet due or which are being contested in good faith by
          appropriate action or proceedings and with respect to which adequate
          reserves are being maintained;

               (iv) statutory Liens of landlords and Liens of carriers,
          warehousemen, mechanics, materialmen, repairmen, workmen, and other
          Liens imposed by law created in the ordinary course of business for
          amounts which are not past due for more than 30 days or which are
          being contested in good faith by appropriate action or proceedings and
          with respect to which adequate reserves in accordance with GAAP are
          being maintained;

               (v) Liens incurred or deposits or pledges made in the ordinary
          course of business in connection with workers' compensation,
          unemployment insurance and other types of social security, old age or
          other similar obligations, or to secure the performance of tenders,
          statutory obligations, surety and appeal bonds, bids, leases,
          government contracts, performance and return-of-money bonds and other
          similar obligations (exclusive of obligations for the payment of
          borrowed money);

               (vi) minor irregularities in title, easements, rights-of-way,
          restrictions, servitudes, permits, reservations, exceptions,
          conditions, covenants and other similar charges or encumbrances not
          materially interfering with the occupation, use and enjoyment by the
          Company or any of its Subsidiaries of any of their respective
          Properties in the normal course of business or materially impairing
          the value thereof;

               (vii)  any obligations or duties affecting any of the Property of
          the Company or its Subsidiaries to any municipality or public
          authority with respect to any franchise, grant, license or permit
          which do not materially impair the use of such Property for the
          purposes for which it is held;

               (viii)  Liens upon Property acquired by the Company, other than
          as a Permitted Acquisition, after the Effective Date with the proceeds
          of no greater than $10,000,000 of Indebtedness permitted pursuant to
          Section 5.04(a)(x); provided that (A) such Lien was created solely for
          the purpose of securing such Indebtedness, (B) and the  principal
          amount of such Indebtedness does not exceed the fair value of such
          Property at the time of its acquisition;

                                       68
<PAGE>
 
               (ix) Liens securing not more than $1,000,000 in the aggregate
          existing on any real or personal property of any Person at the time it
          becomes a Subsidiary after the Effective Date pursuant to a Permitted
          Acquisition;

               (x) extensions, renewals or replacements of any Lien referred to
          in Subsections 5.04(b)(i), (ii) and (ix), provided that the principal
          amount of the Indebtedness or obligation secured thereby is not
          increased and that any such extension, renewal or replacement is
          limited to the Property originally encumbered thereby;

               (xi) with respect to Property located in Canada, reservations,
          limitations, provisos and conditions in any original grant from the
          Crown or any freehold lessor of any of the properties of the Company
          or its Subsidiaries;

               (xii)  Liens resulting from operation of law with respect to any
          judgments or orders not constituting a Default; and

               (xiii)  Liens securing Indebtedness under the Original Credit
          Agreement.

          (c) Mergers, Sales, etc. Merge into or with or consolidate with, or
     permit any of its Subsidiaries to merge into or with or consolidate with,
     any other Person, or sell, lease or otherwise dispose of, or permit any of
     its Subsidiaries to sell, lease or otherwise dispose of (whether in one
     transaction or in a series of transactions) all or any part of its Property
     to any other Person. Notwithstanding the foregoing limitations:

                (i) the Company and its Subsidiaries may (A) sell inventory, and
          other similar assets in the ordinary course of business, (B) sell,
          transfer or otherwise dispose of personal property (including, but not
          limited to, pipe, equipment, machinery and vehicles) in the ordinary
          course of business or when, in the reasonable judgment of the Company,
          such property is no longer used or useful in the conduct of its
          business or the business of its Subsidiaries, and (C) in addition to
          clauses (A) and (B), sell, lease, or otherwise dispose of (1) up to
          $5,000,000 in fair-market value of their Property in the aggregate
          during any Fiscal Year, and (2) more than $5,000,000, but less than
          $10,000,000 in fair-market value of their Property in the aggregate
          during any Fiscal Year, provided that the Company shall either prepay
          the Loans pursuant to Section 2.10(a)(iii) or promptly reinvest the
          Net Proceeds (in excess of $5,000,000) from such sale in Properties
          that, in the good-faith judgment of the Company, meet the Company's
          capital investment criteria;

               (ii) (A) any Subsidiary Guarantor may merge into or with or
          consolidate with any other Subsidiary Guarantor or the Company (and,
          in the case of the Company, so long as the Company is the surviving
          entity), (B) any Canadian Subsidiary may merge into or with or
          consolidate with any other Canadian Subsidiary, (C) Sterling NRO may
          be liquidated into Sterling Canada, and (D) any Canadian Subsidiary
          may merge with or into or consolidate with any Subsidiary Guarantor so
          long as (1) the Subsidiary Guarantor is the surviving entity and 

                                       69
<PAGE>
 
          (2) the Canadian Subsidiary was Solvent immediately prior to the time
          of such merger or consolidation; and

               (iii)  any Subsidiary Guarantor may transfer Property to any
          other Subsidiary Guarantor or to the Company, and any Canadian
          Subsidiary may transfer Property to the Company, any Subsidiary
          Guarantor, or any other Canadian Subsidiary.

          (d) Dividends, etc. Declare or pay any dividend on its capital stock,
     make any payment to purchase, redeem, retire or otherwise acquire any of
     its capital stock or any option, warrant, or other right to acquire such
     capital stock, now or hereafter outstanding, return any capital to its
     stockholders, make any distribution of its assets, capital stock, warrants,
     rights, options, obligations or securities to its stockholders, or permit
     any of its Subsidiaries to do so, except that:

               (i) the Company may declare and deliver dividends payable solely
          in shares of its capital stock or in options, warrants or rights to
          purchase shares of capital stock;

               (ii) the Company may make contributions to the ESOP on behalf of
          the employees of the Company or its Subsidiaries in the aggregate
          amount in any Fiscal Year not to exceed 8% of payroll expense during
          such Fiscal Year attributable to employees of the Company and its
          Subsidiaries who are eligible to participate in the ESOP;

               (iii)  any Subsidiary of the Company other than any U.S.
          Subsidiary of a Canadian Subsidiary may declare and deliver dividends
          to the Company or any wholly-owned Subsidiary of the Company, and any
          Canadian Subsidiary may redeem shares of its own capital stock;

               (iv) the Company may declare and deliver in any Fiscal Year
          Permitted Holdco Dividends so long as, at the time of payment of such
          dividend (both before and after giving effect to the payment thereof),
          the Company satisfies the conditions precedent to the making of Loans
          set forth in Section 3.03; and

               (v) the Company may declare and make a non-cash dividend or make
          a return of capital to Holdco in the form of cancellation by the
          Company of the Indebtedness of Holdco referred to in Section
          5.04(e)(viii).

          (e) Investments, Loans, etc. Make or permit any loans to or
     investments in any Person, or permit any of its Subsidiaries to make or
     permit any loans to or investments in any Person, other than:

               (i) investments, loans or advances, the material details of which
          have been set forth in either the Financial Statements or Schedule
          4.07 hereto;

                                       70
<PAGE>
 
               (ii) investments in direct obligations of the United States of
          America or any agency thereof or, in the case of Canadian
          Subsidiaries, investments in direct obligations of Canada, in each
          case with maturities of one year or less from the date of acquisition;

               (iii)  investments in certificates of deposit of maturities less
          than one year, issued by commercial banks in the United States having
          capital and surplus in excess of $500,000,000 and having short-term
          credit ratings of at least A1 and P1 by Standard & Poor's Ratings
          Group and Moody's Investors Service, Inc., respectively;

               (iv) investments in commercial paper of maturities of not more
          than 270 days  rated at least A1 and P1 by Standard & Poor's Ratings
          Group and Moody's Investors Service, Inc., respectively;

               (v) investments in securities that are obligations of the United
          States government purchased by the Company or any Subsidiary of the
          Company under repurchase agreements pursuant to which arrangements are
          made with selling financial institutions (being a financial
          institution having unimpaired capital and surplus of not less than
          $500,000,000 and with short-term credit ratings of at least A1 and P1
          by Standard & Poor's Ratings Group and Moody's Investors Service,
          Inc., respectively) for such financial institutions to repurchase such
          securities within 30 days from the date of purchase by the Company or
          such Subsidiary, and other similar short-term investments made in
          connection with the Company's or any of its Subsidiary's cash
          management practices; provided that the Company shall take possession
          of all securities purchased by the Company or any Subsidiary under
          repurchase agreements and shall adhere to customary margin and mark-
          to-market procedures with respect to fluctuations in value;

               (vi) investments in any security issued by an investment company
          registered under section 8 of the Investment Company Act of 1940 (15
          U.S.C. 80a-8) that is a money market fund in compliance with all
          applicable requirements of SEC Rule 2a-7 (17 CFR 270.2a-7);

               (vii)  (A)  investments in or loans or advances to Canadian
          Subsidiaries made after August 21, 1996 not to exceed $10,000,000 in
          the aggregate, and (B) loans or advances to, or investments in,
          Guarantor Subsidiaries;

               (viii)  a loan by the Company to Holdco approximately in the
          amount of $450,000,000 on August 21, 1996 to be used by Holdco solely
          for consummation of the  SCI Acquisition and related transaction
          costs;

               (ix) the Secondary ESOP Loan and any renewals or replacements
          thereof or reborrowing thereunder in a total principal amount not to
          exceed $8,500,000 at any time;

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<PAGE>
 
               (x) Permitted Acquisitions in an amount not to exceed (after
          giving effect thereto) Cumulative Retained Cash Flow as of the date
          any such Permitted Acquisition is made;

               (xi) routine loans or advances to employees in the ordinary
          course of business not to exceed $25,000 at any time outstanding to
          any one employee and $500,000 in the aggregate;

               (xii)  loans in an aggregate amount not to exceed $500,000 to
          finance the purchase of homes by employees who have been relocated by
          the Company or any Subsidiary;

               (xiii)  investments, after August 21, 1996, in additional
          Valdosta Bonds issued to finance the completion of the Company's plant
          in Valdosta, Georgia, so long as the Administrative Agent For Combined
          Lenders has a first priority, perfected Lien thereon to secure the
          Combined Lender Indebtedness;

               (xiv)  participations (for a tenor of not more than 90 days) in
          loans to Persons having short-term credit ratings of at least A1 and
          P1 by Standard & Poor's Ratings Group and Moody's Investors Service,
          Inc., respectively;

               (xv)  the AFB Acquisition;

               (xvi)  other investments, loans, or advances in an aggregate
          amount not to exceed $1,000,000 outstanding at any one time.

          (f) Lease Payments. Create, incur, assume or suffer to exist, nor
     permit any of its Subsidiaries to create, incur, assume or suffer to exist,
     any obligation for the payment of rent or hire of Property of any kind
     whatsoever (real or personal), whether directly or as a guarantor, if,
     after giving effect thereto, the aggregate amount of all payments required
     to be made by the Company and its Subsidiaries on a consolidated basis
     pursuant to such leases or lease agreements (excluding payments in respect
     of Capital Lease Obligations and obligations described in Section 5.04(g)
     to the extent permitted by this Agreement) would exceed $5,000,000 in any
     Fiscal Year.

          (g) Sales and Leasebacks. Except as permitted by Section 5.04(a)(x),
     enter into, or permit any of its Subsidiaries to enter into, any
     arrangement, directly or indirectly, with any Person whereby the Company or
     any such Subsidiary shall sell or transfer any Property, whether now owned
     or hereafter acquired, and whereby the Company or any such Subsidiary shall
     then or thereafter rent or lease as lessee such Property or any part
     thereof or other Property which the Company or any such Subsidiary intends
     to use for substantially the same purpose or purposes as the Property sold
     or transferred.

          (h) Nature of Business. Permit any material change to be made in the
     character of its business or the business of any Subsidiary as carried on
     at the date hereof, except as may be permitted pursuant to this Agreement.

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<PAGE>
 
          (i)  ERISA Compliance.

               (i) Engage in, or permit a Subsidiary of the Company or any ERISA
          Affiliate to engage in, any transaction in connection with which the
          Company, a Subsidiary of the Company or any ERISA Affiliate could be
          subjected to either a civil penalty assessed pursuant to Sections
          502(c), (i) or (l) of ERISA or a tax imposed by Chapter 43 of Subtitle
          D of the Code, except where such assessment or imposition could not
          reasonably be expected to have Material Adverse Effect;

               (ii) Terminate, or permit a Subsidiary of the Company or any
          ERISA Affiliate to terminate, any Plan in a manner, or take any other
          action with respect to any Plan, which could reasonably be expected to
          result in any material liability of the Company, a Subsidiary of the
          Company or any ERISA Affiliate to the PBGC or any other Governmental
          Authority;

               (iii)  Fail to make, or permit a Subsidiary of the Company or any
          ERISA Affiliate to fail to make, full payment when due of all amounts
          which, under the provisions of any Plan, agreement relating thereto or
          applicable law, the Company, a Subsidiary of the Company or any ERISA
          Affiliate is required to pay as contributions thereto, except where
          the failure to make such payments could not reasonably be expected to
          have Material Adverse Effect;

               (iv) Permit to exist, or allow a Subsidiary of the Company or any
          ERISA Affiliate to permit to exist, any accumulated funding deficiency
          within the meaning of Section 302 of ERISA or Section 412 of the Code,
          whether or not waived, with respect to any Plan;

               (v) Contribute to or assume an obligation to contribute to, or
          permit a Subsidiary of the Company (other than a Subsidiary acquired
          as permitted pursuant to Section 5.04(i)(vi)) or any ERISA Affiliate
          to contribute to or assume an obligation to contribute to, any
          "multiemployer plan" as such term is defined in Section 3(37) or
          4001(a)(3) of ERISA or any "multi-employer pension plan" as such term
          is defined in the Pension Benefits Act (Ontario);

               (vi) Acquire, or permit a Subsidiary of the Company or any ERISA
          Affiliate to acquire, an interest in any Person that causes such
          Person to become an ERISA Affiliate with respect to the Company or a
          Subsidiary of the Company or with respect to any ERISA Affiliate of
          the Company or a Subsidiary of the Company if such Person sponsors,
          maintains or contributes to, or at any time in the six-year period
          preceding such acquisition has sponsored, maintained, or contributed
          to, (A) any "multiemployer plan" as such term is defined in Section
          3(37) or 4001(a)(3) of ERISA, or (B) any "multi-employer pension plan"
          as such term is defined in the Pension Benefits Act (Ontario);
          provided that, the Company may acquire any such Person if (1) such
          Person is acquired as a Permitted Acquisition, (2) such Person would
          not become an ERISA Affiliate, and (3) neither the Company nor any of
          its other Subsidiaries has any legal liability to perform such
          Person's obligations or assume such Person's liabilities.

                                       73
<PAGE>
 
               (vii)  Fail to pay, or cause to be paid, to the PBGC in a timely
          manner, and without incurring any late payment or underpayment charge
          or penalty, all premiums required pursuant to Sections 4006 and 4007
          of ERISA, except where such failure could not reasonably be expected
          to have a Material Adverse Effect;

               (viii)  Amend, or permit a Subsidiary of the Company or any ERISA
          Affiliate to amend, a Plan resulting in an increase in current
          liability such that the Company, a Subsidiary of the Company or any
          ERISA Affiliate is required to provide security to such Plan under
          Section 401(a)(29) of the Code;

               (ix) Incur, or permit a Subsidiary of the Company or any ERISA
          Affiliate to incur, a material liability to or on account of a Plan
          under Sections 515, 4062, 4063, 4064, 4201 or 4204 of ERISA; or

               (x) Permit, or allow a Subsidiary of the Company or any ERISA
          Affiliate to permit, the actuarial present value of the benefit
          liabilities (computed on an accumulated benefit obligation basis in
          accordance with GAAP) under all Plans in the aggregate to exceed the
          current value of the assets of all Plans in the aggregate that are
          allocable to such benefit liabilities by (A) an amount that could
          reasonably be expected to cause a Material Adverse Effect, if such
          excess is the result of a change in market conditions, and (B) more
          than $10,000,000 if such excess is for any other reason.

          (j) Sale or Discount of Receivables. Discount or sell (with or without
     recourse), or permit any of its Subsidiaries to discount or sell (with or
     without recourse), any of its or its Subsidiaries' notes receivable or
     accounts receivable, other than notes receivable and accounts receivable
     discounted or sold without recourse and in the ordinary course of business
     of the Company and its Subsidiaries (as conducted as of the Effective Date)
     in an aggregate amount not to exceed $15,000,000 in any Fiscal Year.

          (k) Negative Pledge Agreements. Create, incur, assume or suffer to
     exist, or permit any of its Subsidiaries to create, incur, assume or suffer
     to exist, any contract, agreement or understanding (other than this
     Agreement, the other Financing Documents, the Original Credit Agreement or
     as set forth on Schedule I to the respective Security Agreements delivered
     by the Company and its Subsidiaries) which in any way prohibits or
     restricts the granting, conveying, creation or imposition of any Lien on
     any Property of the Company or its Subsidiaries, or which requires the
     consent of or notice to other Persons in connection therewith, other than
     agreements (that do not provide for borrowed money Indebtedness) entered
     into in the ordinary course of business that restrict assignment by the
     Company of its rights thereunder; provided that the Company shall use its
     best efforts to negotiate such restrictions so as not to limit the right of
     the Company to grant a Lien on the Company's rights thereunder in favor of
     the Administrative Agent For Combined Lenders on behalf of the Lenders as
     security for the Lender Indebtedness.

          (l) Transactions with Affiliates. Enter into any transaction or series
     of transactions, or permit any of its Subsidiaries to enter into any
     transaction or series of transactions, with Affiliates 

                                       74
<PAGE>
 
     of the Company or its Subsidiaries which involve an outflow of money or
     other Property from the Company or its Subsidiaries to an Affiliate of the
     Company or its Subsidiaries, including but not limited to repayment of
     Indebtedness, management fees, compensation, salaries, asset purchase
     payments or any other type of fees or payments similar in nature, other
     than on terms and conditions substantially as favorable to the Company and
     its Subsidiaries as would be obtainable by the Company and its Subsidiaries
     in a reasonably comparable arm's-length transaction with a Person other
     than an Affiliate of the Company or its Subsidiaries. Notwithstanding the
     foregoing, the restrictions set forth in this Section 5.04(l) shall not
     apply to: (i) the payment of reasonable and customary fees to directors of
     the Company who are not employees of the Company, (ii) any other
     transaction with any employee, officer or director of the Company or any of
     its Subsidiaries pursuant to employee benefit plans and compensation
     arrangements in amounts customary for corporations similarly situated to
     the Company or any such Subsidiary and entered into the ordinary course of
     business and approved by the Board of Directors of the Company or any
     committee thereof or the Board of Directors of such Subsidiary, (iii) the
     cancellation of Indebtedness described in Section 5.04(e)(viii), (iv) the
     payment of fees to TSG in connection with the AFB Acquisition which have
     been disclosed prior to the Effective Date to the Administrative Agent in
     writing, or (v) any other transactions with Affiliates that do not in the
     aggregate involve the payment of more than $1,000,000 during any twelve-
     month period.

          (m) Unconditional Purchase Obligations. Enter into or be a party to,
     or permit any of its Subsidiaries to enter into or be a party to, any
     material contract for the purchase of materials, supplies or other property
     or services, if such contract requires that payment be made by it
     regardless of whether or not delivery is ever made of such materials,
     supplies or other property or services, except any such contract for the
     purchase of power entered into by the Company or any Subsidiary in the
     ordinary course of its business.

          (n) Stock. Authorize or issue (i) any Voting Stock to any Person other
     than Holdco or (ii) any preferred stock or other equity securities having a
     mandatory redemption right existing with regard thereto.

          (o) Capital Expenditures. Make, or permit any of its Subsidiaries to
     make, Capital Expenditures in any Fiscal Year for the Company and its
     Subsidiaries on a consolidated basis in excess of the sum of (i), (ii) and
     (iii) below:

               (i) The Company may make Capital Expenditures in any Fiscal Year
          pursuant to the following schedule:

                                       Maximum Scheduled
          Fiscal Year Ending          Capital Expenditures
          ------------------          --------------------
          September 30, 1997               $50,000,000
          September 30, 1998               $45,000,000
          September 30, 1999 and           $35,000,000
           each Fiscal Year thereafter

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<PAGE>
 
               (ii) Up to 50% of the amount listed above for any Fiscal Year but
          not expended in such Fiscal Year may be carried forward and expended
          during the next Fiscal Year (but not any other Fiscal Year).

               (iii)  In addition to Capital Expenditures permitted by Sections
          5.04(o)(i) and (ii), the Company may make Capital Expenditures in an
          amount (after giving effect thereto) not to exceed Cumulative Retained
          Cash Flow, as of the date any such Capital Expenditure is made.

               (iv) In addition to Capital Expenditures permitted by Sections
          5.04(o)(i), (ii) and (iii), for the period from the Effective Date
          through September 30, 1996, the Company and its Subsidiaries may make
          Capital Expenditures in an amount not to exceed $18,000,000.

     Capital Expenditures that are not designated as Capital Expenditures from
     Retained Cash Flow pursuant to a Notice of Designated Retained Cash Flow
     Usage, are deemed to apply first to Carry-Forward Capital Expenditures and
     last to Scheduled Capital Expenditures.

          (p) Modifications to Senior Subordinated Notes; No Voluntary
     Prepayments.

               (i) Amend, modify, or waive any covenant contained in the Senior
          Subordinated Notes or the Senior Subordinated Notes Indenture if the
          effect of such amendment, modification, or waiver would be to make the
          terms of the Senior Subordinated Notes or the Senior Subordinated
          Notes Indenture materially more onerous on the Company;

               (ii) Amend, modify, or waive any provision of the Senior
          Subordinated Notes or the Senior Subordinated Notes Indenture which
          (A) subjects the Company to any additional material obligation, (B)
          increases the principal of or rate of interest on any Senior
          Subordinated Note, (C) accelerates the date fixed for any payment of
          principal or interest on any Senior Subordinated Note, (D) would
          change the percentage of holders of such Senior Subordinated Notes
          required for any such amendment, modification, or waiver from the
          percentage required on the Effective Date, or (E) relates to the
          subordination provisions thereof; or

               (iii)  make any voluntary prepayment of, or optionally redeem, or
          make any payment in defeasance of, any part of the Senior Subordinated
          Notes.

          (q) Intercompany Transactions. Create and will not permit any of its
     Subsidiaries to, create or otherwise cause or permit to exist or become
     effective, except as may be expressly permitted or required by the
     Financing Documents, any consensual encumbrance or restriction of any kind
     on the ability of any Subsidiary to (i) pay dividends or make any other
     distribution to the Company or any of its Subsidiaries in respect of such
     Subsidiary's capital stock or with respect to any other interest or
     participation in, or measured by, its profits, (ii) pay any indebtedness
     owed to the Company or any of its Subsidiaries, (iii) make any loan or
     advance to the Company or any of its Subsidiaries, or (iv) sell, lease or
     transfer any of its Property to the Company or any of its Subsidiaries.

                                       76
<PAGE>
 
          (r) Modification of Original Credit Agreement. Subject to the terms of
     the Intercreditor Agreement, amend, modify or waive any provision of the
     Original Credit Agreement unless, if there is a corresponding provision in
     this Agreement, there is a substantially similar amendment, modification or
     waiver made under this Agreement.

          (s) Modification or Amendment of the AFB Earnout Agreement. Amend,
     modify or waive any provision of the AFB Earnout Agreement if the effect of
     such amendment, modification or waiver would be to increase any amount
     payable thereunder.


                                  ARTICLE VI

                               EVENTS OF DEFAULT

     Upon the occurrence and during the continuance of any of the following
specified events (each an "Event of Default"):

     Section 6.01 Payments. (a) The Company shall fail to pay when due
(including, but not limited to, by mandatory prepayment required pursuant to
Section 2.10) any principal of any Loan or any Note or any Original Loan or any
Reimbursement Obligation (as defined in the Original Credit Agreement); or (b)
the Company shall fail to pay when due any interest on any Loan or Note or any
Original Loan, any fee or any other amount payable hereunder, under the Fee
Letter, any other Financing Document or under the Original Credit Agreement or
the Original Fee Letter, and such failure to pay shall continue unremedied for a
period of five days;

     Section 6.02 Covenants Without Notice. The Company shall fail to observe or
perform any covenant or agreement contained in Subsections 5.01(e), (g) and (i),
Section 5.03 or Section 5.04 (other than Subsections 5.04(b)(iii)-(v) hereof).

     Section 6.03 Other Covenants. The Company shall fail to observe or perform
any covenant or agreement contained in (a) Subsections 5.02(a), (b), (c), (d),
(f), (g), (h), (j), (k) or (m) or Subsections 5.04(b)(iii)-(v), and, if capable
of being remedied, such failure shall remain unremedied for 10 days after the
earlier of (i) the Company's obtaining knowledge thereof, or (ii) written notice
thereof shall have been given to the Company by any Lender or the Administrative
Agent; and (b) this Agreement, other than those referred to in Sections 6.01,
6.02, or clause (a) of this Section 6.03, and, if capable of being remedied,
such failure shall remain unremedied for 30 days after the earlier of (i) the
Company's obtaining knowledge thereof, or (ii) written notice thereof shall have
been given to the Company by any Lender or the Administrative Agent;

     Section 6.04 Other Financing Document Obligations. Default is made in the
due observance or performance by Holdco, the Company or any Subsidiary of the
Company of any of the covenants or agreements contained in any Financing
Document other than this Agreement, and such default continues unremedied beyond
the expiration of any applicable grace period which may be expressly allowed
under such Financing Document;

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<PAGE>
 
     Section 6.05 Representations. Any representation, warranty or statement
made or deemed to be made by Holdco, the Company or any Subsidiary of the
Company or any of Holdco's, such Company's, or Subsidiary's officers herein or
in any other Financing Document, or in any certificate, request or other
document furnished pursuant to or under this Agreement or any other Financing
Document, shall have been incorrect in any material respect as of the date when
made or deemed to be made;

     Section 6.06 Non-Payments of Other Indebtedness. The Company or any of its
Subsidiaries shall fail to make any payment or payments of principal of or
interest on any Indebtedness of the Company or such Subsidiary (other than (i)
the Combined Lender Indebtedness and (ii) any trade account subject to a bona
fide dispute and the trade creditor has neither filed a lawsuit nor caused a
Lien to be placed upon any Property of the Company or such Subsidiary) in excess
of $10,000,000 in the aggregate when due (whether at stated maturity, by
acceleration, on demand or otherwise) after giving effect to any applicable
grace period;

     Section 6.07 Defaults Under Other Agreements. The Company or any of its
Subsidiaries shall fail to observe or perform any covenant or agreement
contained in any agreement(s) or instrument(s) relating to Indebtedness of the
Company or such Subsidiary of $10,000,000 or more in the aggregate within any
applicable grace period, or any other event shall occur, if the effect of such
failure or other event is to accelerate, or to permit the holder of such
Indebtedness or any other Person to accelerate, the maturity of $10,000,000 or
more in the aggregate of such Indebtedness; or $10,000,000 or more in the
aggregate of any such Indebtedness shall be, or if as a result of such failure
or other event may be, required to be prepaid (other than by a regularly
scheduled required prepayment) in whole or in part prior to its stated maturity;

     Section 6.08 Bankruptcy. Holdco, the Company or any of its Subsidiaries
shall commence a voluntary case concerning itself under Title 11 of the United
States Code entitled "Bankruptcy" as now or hereafter in effect, or any
successor thereto (the "Bankruptcy Code"); or an involuntary case is commenced
against Holdco, the Company or any of its Subsidiaries and the petition is not
controverted within 10 days, or is not stayed or dismissed within 60 days, after
commencement of the case; or a custodian (as defined in the Bankruptcy Code) is
appointed for, or takes charge of, all or any substantial part of the property
of Holdco, the Company or any of its Subsidiaries; or Holdco, the Company or any
of its Subsidiaries commences any other proceeding under any reorganization,
arrangement, adjustment of debt, relief of debtors, dissolution, insolvency or
liquidation or similar law of any jurisdiction whether now or hereafter in
effect relating to Holdco, the Company or such Subsidiary or there is commenced
against Holdco, the Company or any of its Subsidiaries any such proceeding which
remains unstayed or undismissed for a period of 60 days; or Holdco, the Company
or any of its Subsidiaries is adjudicated insolvent or bankrupt; or any order of
relief or other order approving any such case or proceeding is entered; or
Holdco, the Company or any of its Subsidiaries suffers any appointment of any
custodian or the like for it or any substantial part of its Property to continue
undischarged or unstayed for a period of 60 days; or Holdco, the Company or any
of its Subsidiaries makes a general assignment for the benefit of creditors; or
Holdco, the Company or any of its Subsidiaries shall fail to pay, or shall state
in writing that it is unable to pay, or shall be unable to pay, its debts
generally as they become due; or Holdco, the Company or any of its Subsidiaries
shall by any act or failure to act indicate its consent to, approval of or
acquiescence in any of the foregoing; or any corporate action is taken by
Holdco, the Company or any of its Subsidiaries for the purpose of effecting any
of the foregoing;

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<PAGE>
 
     Section 6.09 Money Judgment. Judgments or orders for the payment of money
involving in the aggregate at any time a liability (net of any insurance
proceeds or indemnity payments actually received in respect thereof prior to or
within 60 days from the entry thereof, or to be received in respect thereof in
the event any appeal thereof shall be unsuccessful) of more than $10,000,000, or
that would otherwise have a Material Adverse Effect shall be rendered against
the Company or any of it Subsidiaries and such judgment or order shall continue
unsatisfied in accordance with the terms of such judgment or order (in the case
of a money judgment) and in effect for a period of 60 days during which
execution shall not be effectively stayed or deferred (whether by action of a
court, by agreement or otherwise);

     Section 6.10 Discontinuance of Business. Except as a result of any merger
permitted by Section 5.04(c), the Company or any material Subsidiary shall cease
to be principally engaged in the businesses and operations in which it was
principally engaged on the Effective Date;

     Section 6.11 Financing Documents. Any Material Provision of any of the
Financing Documents after delivery thereof shall for any reason, except to the
extent permitted by the terms thereof, cease to be in full force and effect and
valid, binding and enforceable (except as enforceability may be limited as
stated in Section 4.03) in accordance with its terms, or, in the case of any of
the Security Instruments, cease to create a valid and perfected Lien of the
priority contemplated thereby on any of the collateral purported to be covered
thereby, or the Company or any of its Subsidiaries (or any other Person who may
have granted or purported to grant such Lien) shall so state in writing. As used
in this Section 6.11, "Material Provision" shall mean (i) with respect to this
Agreement, the Notes, or any Subsidiary Guaranty, any material term, covenant,
or agreement set forth therein, and (ii) with respect to any other Financing
Document, any provision if the validity and enforceability thereof is necessary
for such Financing Document to accomplish its stated, or clearly intended,
purpose or otherwise necessary in order for any Lender to enforce any material
right or remedy under any Financing Document;

     Section 6.12  Change of Control. The occurrence of a Change of Control;

     Section 6.13 Purchase Agreement Representations and Warranties. Any
representation or warranty made or deemed made by any Cytec Party in the
Purchase Agreement shall be or have been incorrect in any respect as of December
23, 1996 that could reasonably be expected to have a Material Adverse Effect;

     Section 6.14 Albright Indemnity. (a) The occurrence, with respect to
Albright, of any of the events described in Section 6.08 or the failure of the
Albright Indemnity to continue to be in full force and effect, (b) the
occurrence of any event or the existence of any condition that would have been
covered by the Albright Indemnity, and (c) the existence of (a) and (b),
collectively, could reasonably be expected to have a Material Adverse Effect;

     Section 6.15 Default Under Senior Secured Discount Notes. Holdco shall fail
to observe or perform any covenant or agreement contained in the Senior Secured
Discount Notes or the Senior Secured Discount Notes Indenture within any
applicable grace period, if the effect of such failure or other event is to
accelerate, or to permit the holders of the Senior Secured Discount Notes or any
other Person to accelerate, the maturity thereof;

                                       79
<PAGE>
 
     Section 6.16 Senior Indebtedness. The Senior Subordinated Notes shall
cease, for any reason, to be validly subordinated to the Lender Indebtedness, as
provided in the Senior Subordinated Notes Indenture or the Company, any
Affiliate of the Company, the trustee in respect of the Senior Subordinated
Notes or the holders of at least 25% in aggregate principal amount of the Senior
Subordinated Notes shall so assert in writing;

     Section 6.17 Equity Note Contributions. Failure of Holdco to contribute to
the Company and the Company to contribute or loan to Sterling Fibers at least
$300,000 of additional cash equity within 90 days of the Effective Date
irrespective of the amount collected on the Equity Notes during such period; or

     Section 6.18 Cytec Indemnity. (a) The occurrence, with respect to any of
the Cytec Parties, of any of the events described in Section 6.08 or the failure
of the Cytec Indemnity to continue to be in full force and effect, (b) the
occurrence of any event or the existence of any condition that would have been
covered by the Cytec Indemnity, and (c) the existence of (a) and (b),
collectively, could reasonably be expected to have a Material Adverse Effect;

then, and in any such event, and at any time thereafter, if any Event of Default
shall then be continuing, the Administrative Agent, upon the written or telex
request of the Required Lenders, shall, by written notice to the Company, take
any or all of the following actions, without prejudice to the rights of the
Administrative Agent, any Lender or the holder of any Note, to enforce its
claims against the Company:  declare the entire principal amount of and all
accrued interest on all Lender Indebtedness then outstanding to be, whereupon
the same shall become, forthwith due and payable without presentment, demand,
protest, notice of protest or dishonor, notice of acceleration, notice of intent
to accelerate or other notice of any kind, all of which are hereby expressly
waived by the Company, and thereupon take such action as it may deem desirable
under and pursuant to the Financing Documents; provided, that, if an Event of
Default specified in Section 6.08 shall occur, the result which would occur upon
the giving of written notice by the Administrative Agent to the Company, shall
occur automatically without the giving of any such notice.


                                 ARTICLE VII

                                 THE AGENTS

     Section 7.01 Appointment of Administrative Agent. Each Lender (and each
Secured Affiliate by and through its affiliated Lender) and the Documentation
Agent hereby designates Texas Commerce Bank National Association, as
Administrative Agent (and further designates Texas Commerce Bank National
Association, in its capacity as "Administrative Agent" under the Original Credit
Agreement, as Administrative Agent For Combined Lenders) to act as herein
specified and as specified in the other Financing Documents. Each Lender (and
each Secured Affiliate by and through its affiliated Lender) and the
Documentation Agent hereby irrevocably authorizes the Administrative Agent and
the Administrative Agent For Combined Lenders to take such action on its behalf
under the provisions of this Agreement, the Notes, and the other Financing
Documents and to exercise such powers and to perform such duties hereunder and
thereunder as are specifically delegated to or required of the Administrative
Agent or the Administrative Agent For Combined Lenders, as applicable, by the
terms hereof and thereof and such other powers as are reasonably incidental

                                       80
<PAGE>
 
thereto. The Administrative Agent or the Administrative Agent For Combined
Lenders may perform any of its duties hereunder by or through its agents or
employees.

     Section 7.02  Limitation of Duties of Administrative Agent and the
Administrative Agent For Combined Lenders. The Administrative Agent and the
Administrative Agent For Combined Lenders shall have no duties or
responsibilities except those expressly set forth with respect to the
Administrative Agent and the Administrative Agent For Combined Lenders in this
Agreement and as specified in the other Financing Documents. None of the
Administrative Agent, the Administrative Agent For Combined Lenders nor any of
their respective officers, directors, employees or agents shall be liable for
any action taken or omitted by it as such hereunder or in connection herewith,
unless caused by its or their gross negligence or willful misconduct. The duties
of the Administrative Agent and the Administrative Agent For Combined Lenders
shall be mechanical and administrative in nature; neither the Administrative
Agent nor the Administrative Agent For Combined Lenders shall have by reason of
this Agreement a fiduciary relationship in respect of any Lender; and nothing in
this Agreement, expressed or implied, is intended to or shall be so construed as
to impose upon the Administrative Agent or the Administrative Agent For Combined
Lenders any obligations in respect of this Agreement except as expressly set
forth herein.

     Section 7.03  Lack of Reliance on the Administrative Agent, the
Administrative Agent For Combined Lenders and the Documentation Agent.

          (a) Independent Investigation.  Independently and without reliance
     upon the Administrative Agent, the Administrative Agent For Combined
     Lenders or the Documentation Agent, each Lender, to the extent it deems
     appropriate, has made and shall continue to make (i) its own independent
     investigation of the financial condition and affairs of the Company in
     connection with the taking or not taking of any action in connection
     herewith, and (ii) its own appraisal of the creditworthiness of the
     Company, and, except as expressly provided in this Agreement, and the other
     Financing Documents the Administrative Agent, the Administrative Agent For
     Combined Lenders and the Documentation Agent shall have no duty or
     responsibility, either initially or on a continuing basis, to provide any
     Lender with any credit or other information with respect thereto, whether
     coming into its possession before the consummation of the transactions
     contemplated herein or at any time or times thereafter.

          (b) Agents Not Responsible.  The Administrative Agent, the
     Administrative Agent For Combined Lenders and the Documentation Agent shall
     not be responsible to any Lender for any recitals, statements, information,
     representations or warranties herein or in any document, certificate or
     other writing delivered in connection herewith or for the execution,
     effectiveness, genuineness, validity, enforceability, collectibility,
     priority or sufficiency of this Agreement, the Notes or the other Financing
     Documents or the financial condition of the Company or be required to make
     any inquiry concerning either the performance or observance of any of the
     terms, provisions or conditions of this Agreement, the Notes or the other
     Financing Documents, or the financial condition of the Company, or the
     existence or possible existence of any Default or Event of Default.

     Section 7.04 Certain Rights of the Administrative Agent. If the
Administrative Agent or the Administrative Agent For Combined Lenders shall
request instructions from the Required Lenders with respect 

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<PAGE>
 
to any act or action (including the failure to act) in connection with this
Agreement, the Notes and the other Financing Documents, the Administrative Agent
or the Administrative Agent For Combined Lenders shall be entitled to refrain
from such act or taking such action unless and until the Administrative Agent or
the Administrative Agent For Combined Lenders, as applicable, shall have
received instructions from the Required Lenders; and neither the Administrative
Agent nor the Administrative Agent For Combined Lenders shall incur liability to
any Person by reason of so refraining. Without limiting the foregoing, no Lender
shall have any right of action whatsoever against the Administrative Agent or
the Administrative Agent For Combined Lenders as a result of the Administrative
Agent or the Administrative Agent For Combined Lenders acting or refraining from
acting under this Agreement, the Notes and the other Financing Documents in
accordance with the instructions of the Required Lenders, or to the extent
required by Section 8.02, all of the Lenders.

     Section 7.05 Reliance by Administrative Agent. The Administrative Agent and
the Administrative Agent For Combined Lenders shall be entitled to rely, and
shall be fully protected in relying, upon any note, writing, resolution, notice,
statement, certificate, telex, teletype or telecopier message, cablegram,
radiogram, order or other documentary teletransmission or telephone message
believed by it to be genuine and correct and to have been signed, sent or made
by the proper Person. The Administrative Agent and the Administrative Agent For
Combined Lenders may consult with legal counsel (including counsel for the
Company), independent public accountants and other experts selected by it and
shall not be liable for any action taken or omitted to be taken by it in good
faith in accordance with the advice of such counsel, accountants or experts.

     Section 7.06  INDEMNIFICATION OF ADMINISTRATIVE AGENT, ADMINISTRATIVE AGENT
FOR COMBINED LENDERS AND DOCUMENTATION AGENT. TO THE EXTENT THE ADMINISTRATIVE
AGENT OR THE DOCUMENTATION AGENT IS NOT REIMBURSED AND INDEMNIFIED BY THE
COMPANY, EACH LENDER WILL REIMBURSE AND INDEMNIFY THE ADMINISTRATIVE AGENT, THE
ADMINISTRATIVE AGENT FOR COMBINED LENDERS OR THE DOCUMENTATION AGENT, AS
APPLICABLE, IN PROPORTION TO ITS TOTAL CREDIT PERCENTAGE, FOR AND AGAINST ANY
AND ALL LIABILITIES, OBLIGATIONS, LOSSES, DAMAGES, PENALTIES, ACTIONS,
JUDGMENTS, SUITS, COSTS, EXPENSES (INCLUDING REASONABLE COUNSEL FEES AND
DISBURSEMENTS) OR DISBURSEMENTS OF ANY KIND OR NATURE WHATSOEVER WHICH MAY BE
IMPOSED ON, INCURRED BY OR ASSERTED AGAINST THE ADMINISTRATIVE AGENT, THE
ADMINISTRATIVE AGENT FOR COMBINED LENDERS OR THE DOCUMENTATION AGENT IN
PERFORMING ITS DUTIES HEREUNDER, IN ANY WAY RELATING TO OR ARISING OUT OF THIS
AGREEMENT AND BY REASON OF THE ORDINARY NEGLIGENCE OF THE ADMINISTRATIVE AGENT,
THE ADMINISTRATIVE AGENT FOR COMBINED LENDERS AND THE DOCUMENTATION AGENT;
PROVIDED THAT NO LENDER SHALL BE LIABLE TO THE ADMINISTRATIVE AGENT, THE
ADMINISTRATIVE AGENT FOR COMBINED LENDERS OR THE DOCUMENTATION AGENT FOR ANY
PORTION OF SUCH LIABILITIES, OBLIGATIONS, LOSSES, DAMAGES, PENALTIES, ACTIONS,
JUDGMENTS, SUITS, COSTS, EXPENSES OR DISBURSEMENTS RESULTING FROM, AS TO THE
ADMINISTRATIVE AGENT, THE ADMINISTRATIVE AGENT'S GROSS NEGLIGENCE OR WILLFUL
MISCONDUCT , AS TO THE ADMINISTRATIVE AGENT FOR COMBINED LENDERS, THE GROSS
NEGLIGENCE OR WILLFUL MISCONDUCT OF THE ADMINISTRATIVE AGENT FOR COMBINED
LENDERS OR, AS TO THE DOCUMENTATION AGENT, THE DOCUMENTATION AGENT'S GROSS
NEGLIGENCE OR WILLFUL MISCONDUCT.

     Section 7.07  The Administrative Agent, the Administrative Agent For
Combined Lenders and Documentation Agent in their Individual Capacity. With
respect to their obligations under this Agreement, the Loans made by it and the
Notes issued to it, the Administrative Agent, the Administrative Agent For

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Combined Lenders and Documentation Agent shall have the same rights and powers
hereunder as any other Lender or holder of a Note and may exercise the same as
though it were not performing the duties, if any, specified herein; and the
terms "Lenders," "Required Lenders," "Tranche A Term Loan Lenders," "Tranche B
Term Loan Lenders," "holders of Notes" or any similar terms shall, unless the
context clearly otherwise indicates, include the Administrative Agent, the
Administrative Agent For Combined Lenders and Documentation Agent in their
individual capacity. The Administrative Agent, the Administrative Agent For
Combined Lenders and Documentation Agent may accept deposits from, lend money
to, and generally engage in any kind of banking, trust, financial advisory or
other business with the Company or any affiliate of the Company as if it were
not performing the duties, if any, specified herein, and may accept fees and
other consideration from the Company for services in connection with this
Agreement and otherwise without having to account for the same to the Lenders.

     Section 7.08 May Treat Lender as Owner. The Company, the Administrative
Agent and the Administrative Agent For Combined Lenders may deem and treat each
Lender as the owner of such Lender's Note for all purposes hereof unless and
until a written notice of the assignment or transfer thereof shall have been
filed with the Administrative Agent. Any request, authority or consent of any
Person who at the time of making such request or giving such authority or
consent is the owner of a Note shall be conclusive and binding on any subsequent
owner, transferee or assignee of such Note or any promissory note or notes
issued in exchange therefor.

     Section 7.09  Successor Administrative Agent or Administrative Agent For
Combined Lenders.

          (a) Administrative Agent or Administrative Agent For Combined Lenders
     Resignation.  The Administrative Agent or the Administrative Agent For
     Combined Lenders may resign at any time by giving written notice thereof to
     the Lenders and the Company and may be removed at any time with or without
     cause by the Required Lenders.  Upon any such resignation or removal, the
     Required Lenders shall have the right, upon five days' notice to the
     Company, to appoint a successor Administrative Agent or Administrative
     Agent For Combined Lenders, subject to the approval of the Company, such
     approval not to be unreasonably withheld.  If no successor Administrative
     Agent or the Administrative Agent For Combined Lenders shall have been so
     appointed by the Required Lenders, and shall have accepted such
     appointment, within 30 days after the retiring Administrative Agent's
     giving of notice of resignation or the Required Lenders' removal of the
     retiring Administrative Agent or, in the case of the Administrative Agent
     For Combined Lenders, within 30 days after its giving of notice of
     resignation or of the Required Lenders' removal of the retiring
     Administrative Agent For Combined Lenders, then, upon five days' notice to
     the Company, the retiring Administrative Agent or the retiring
     Administrative Agent For Combined Lenders, as applicable, may, on behalf of
     the Lenders, appoint a successor Administrative Agent or successor
     Administrative Agent For Combined Lenders, as applicable, (subject to
     approval of the Company, such approval not to be unreasonably withheld),
     which shall be a bank which maintains an office in the United States, or a
     commercial bank organized under the laws of the United States of America or
     of any State thereof, or any Affiliate of such bank, having a combined
     capital and surplus of at least $250,000,000.

          (b) Rights, Powers, etc.  Upon the acceptance of any appointment as
     Administrative Agent or the Administrative Agent For Combined Lenders
     hereunder by a successor Administrative 

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<PAGE>
 
     Agent or successor Administrative Agent For Combined Lenders, as
     applicable, such successor Administrative Agent or successor Administrative
     Agent For Combined Lenders, as applicable, shall thereupon succeed to and
     become vested with all the rights, powers, privileges and duties of the
     retiring Administrative Agent or the retiring Administrative Agent For
     Combined Lenders, as applicable, and the retiring Administrative Agent and
     the retiring Administrative Agent For Combined Lenders, as applicable,
     shall be discharged from its duties and obligations under this Agreement
     and the other Financing Documents. After any retiring Administrative
     Agent's resignation or removal hereunder as Administrative Agent or the
     resignation or removal of any Administrative Agent For Combined Lenders as
     Administrative Agent For Combined Lenders, the provisions of this Article
     VII shall inure to its benefit as to any actions taken or omitted to be
     taken by it while it was Administrative Agent or the Administrative Agent
     For Combined Lenders, as applicable, under this Agreement.

     Section 7.10 Documentation Agent. The Documentation Agent has no duties
hereunder in its capacity as Documentation Agent.

     Section 7.11 The Administrative Agent For Combined Lenders. The resignation
or removal of the Administrative Agent For Combined Lenders shall not affect the
rights, duties and obligations of the Administrative Agent For Combined Lenders
as "Administrative Agent" under the Original Credit Agreement.


                                 ARTICLE VIII

                                 MISCELLANEOUS

     Section 8.01 Notices. All notices, requests and other communications to any
party hereunder shall be in writing (including, telecopy or similar
teletransmission or writing) and shall be given to such party at its address or
telecopy number set forth on the signature pages hereof or such other address or
telecopy number as such party may hereafter specify by notice to the
Administrative Agent and the Company. Each such notice, request or other
communication shall be effective (i) if given by mail, 72 hours after such
communication is deposited in the mails with first class postage prepaid,
addressed as aforesaid, or (ii) if given by any other means (including, but not
limited to, by air courier), when delivered at the address specified in this
Section; provided that notices to the Administrative Agent shall not be
effective until actually and physically received.

     Section 8.02 Amendments and Waivers. Neither this Agreement nor any other
Financing Document, nor any terms hereof or thereof, may be amended,
supplemented or modified except in accordance with the provisions of this
Section. The Required Lenders may, or, with the written consent of the Required
Lenders, the Administrative Agent shall, from time to time, (x) enter into with
the Company, written amendments, supplements or modifications hereto and to the
other Financing Documents for the purpose of adding any provisions to this
Agreement or to the other Financing Documents or changing in any manner the
rights or obligations of the Lenders or the Company hereunder or thereunder or
(y) waive at the Company's request, on such terms and conditions as the Required
Lenders or the Administrative Agent, as the case may be, may specify in such
instrument, any of the requirements of this Agreement or the other Financing
Documents or any Default and its consequences; provided, however, that no such
waiver and no such amendment, supplement or modification shall:

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<PAGE>
 
               (a) reduce the amount or extend the scheduled date of maturity of
          any Loan or any scheduled installment thereof or reduce the stated
          rate of any interest or fee payable hereunder or extend the scheduled
          date of any payment thereof  or modify any provision that provides for
          the ratable sharing by the Lenders of any payment or prepayment of
          Lender Indebtedness to provide for a non-ratable sharing thereof or
          the right of the Term Lenders to decline acceptance of prepayment or
          increase the amount or extend the expiration date of any Lender's
          Commitments or amend, modify or waive any provision of Section 2.19,
          in each case without the prior written consent of each Lender directly
          affected thereby;

               (b) change the currency in which any Loan is payable or amend,
          modify or waive any provision of this Section 8.02 or reduce the
          percentage specified in the definition of Required Lenders, in each
          case without the written consent of all of the Lenders;

               (c) release (A) any Subsidiary Guarantor from its obligations
          under the Subsidiary Guaranty or (B) any of the Collateral, without
          the written consent of all of the Lenders, except as expressly
          permitted hereby, provided that the Administrative Agent shall release
          (without consent from the Lenders) any Collateral sold, transferred or
          otherwise disposed of as permitted by Section 5.04(c); or

               (d) amend, modify or waive any provision of Article VII without
          the written consent of the Administrative Agent, and of the
          Documentation Agent, if affected thereby.

     Any waiver and any amendment, supplement or modification pursuant to this
     Section 8.02 shall apply to each of the Lenders and shall be binding upon
     the Company, the Lenders, the Administrative Agent and all future holders
     of the Loans.  In the case of any waiver, the Company, the Lenders and the
     Administrative Agent shall be restored to their former position and rights
     hereunder and under the other Financing Documents, and any Default waived
     shall be deemed to be cured and not continuing; but no such waiver shall
     extend to any subsequent or other Default, or impair any right consequent
     thereon.

     Section 8.03 No Waiver; Remedies Cumulative. No failure or delay on the
part of the Company or the Administrative Agent or any Lender or any holder of
any Note in exercising any right or remedy under this Agreement or any other
Financing Document and no course of dealing between the Company and the
Administrative Agent or any Lender or any holder of any Note shall operate as a
waiver thereof, nor shall any single or partial exercise of any right or remedy
under the Notes, this Agreement or any other Financing Document preclude any
other or further exercise thereof or the exercise of any other right or remedy
under the Notes, this Agreement or any other Financing Document. The rights and
remedies herein expressly provided are cumulative and not exclusive of any
rights or remedies which the Company, the Administrative Agent or any Lender
would otherwise have. No notice to or demand on the Company not required under
the Notes, this Agreement or any other Financing Document in any case shall
entitle the Company to any other or further notice or demand in similar or other
circumstances or constitute a waiver of the rights of the Administrative Agent
or the Lenders to any other or further action in any circumstances without
notice or demand.

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<PAGE>
 
     Section 8.04 Payment of Expenses, Indemnities, etc. The Company agrees to
(and shall be liable for):

          (a) Expenses.  Whether or not the transactions hereby contemplated are
     consummated, pay all reasonable out-of-pocket costs and expenses of the
     Agents in the administration (both before and after the execution hereof
     and including advice of counsel for the Administrative Agent and the
     Administrative Agent For Combined Lenders as to the rights and duties of
     the Administrative Agent or the Administrative Agent For Combined Lenders,
     as applicable, and the Lenders with respect thereto) of, and in connection
     with the preparation, execution and delivery of, recording or filing of,
     preservation of rights under, enforcement of, and, after a Default,
     refinancing, renegotiation or restructuring of, this Agreement, the Notes,
     and the other Financing Documents and any amendment, waiver or consent
     relating thereto (including, but not limited to, the reasonable fees and
     disbursements of counsel for the Administrative Agent or the Administrative
     Agent For Combined Lenders, as applicable, and in the case of enforcement
     for any of the Lenders) and promptly reimburse the Administrative Agent or
     the Administrative Agent For Combined Lenders, as applicable, for all
     amounts expended, advanced, or incurred by the Administrative Agent or the
     Administrative Agent For Combined Lenders, as applicable, or the Lenders to
     satisfy any obligation of the Company, Holdco, or the Subsidiary Guarantors
     under this Agreement or any other Financing Document;

          (B) INDEMNIFICATION.  INDEMNIFY THE AGENTS AND EACH LENDER, EACH OF
     THEIR RESPECTIVE OFFICERS, DIRECTORS, EMPLOYEES, REPRESENTATIVES, AGENTS
     AND AFFILIATES FROM, HOLD EACH OF THEM HARMLESS AGAINST, AND PROMPTLY UPON
     DEMAND PAY OR REIMBURSE EACH OF THEM FOR, ANY AND ALL ACTIONS, SUITS,
     PROCEEDINGS (INCLUDING ANY INVESTIGATIONS, LITIGATION OR INQUIRIES),
     CLAIMS, COSTS, LOSSES, LIABILITIES, DAMAGES OR EXPENSES OF ANY KIND OR
     NATURE WHATSOEVER WHICH MAY BE INCURRED BY OR ASSERTED AGAINST OR INVOLVE
     ANY OF THEM (WHETHER OR NOT ANY OF THEM IS DESIGNATED A PARTY THERETO) AS A
     RESULT OF, ARISING OUT OF OR IN ANY WAY RELATED TO (I) ANY ACTUAL OR
     PROPOSED USE BY THE COMPANY OR ANY SUBSIDIARY OF THE COMPANY OF THE
     PROCEEDS OF ANY OF THE LOANS; OR (II) ANY OTHER ASPECT OF THIS AGREEMENT,
     THE NOTES, AND THE FINANCING DOCUMENTS, INCLUDING BUT NOT LIMITED TO THE
     REASONABLE FEES AND DISBURSEMENTS OF COUNSEL (INCLUDING ALLOCATED COSTS OF
     INTERNAL COUNSEL) AND ALL OTHER EXPENSES INCURRED IN CONNECTION WITH
     INVESTIGATING, DEFENDING OR PREPARING TO DEFEND ANY SUCH ACTION, SUIT,
     PROCEEDING (INCLUDING ANY INVESTIGATIONS, LITIGATION OR INQUIRIES) OR
     CLAIM, AND INCLUDING ALL ACTIONS, SUITS, PROCEEDINGS (INCLUDING ANY
     INVESTIGATIONS, LITIGATION OR INQUIRIES), CLAIMS, COSTS, LOSSES,
     LIABILITIES, DAMAGES OR EXPENSES ARISING BY REASON OF ORDINARY NEGLIGENCE
     OF ANY OF THE ADMINISTRATIVE AGENT, THE ADMINISTRATIVE AGENT FOR COMBINED
     LENDERS, THE DOCUMENTATION AGENT AND EACH LENDER, EACH OF THEIR RESPECTIVE
     OFFICERS, DIRECTORS, EMPLOYEES, REPRESENTATIVES, AGENTS AND AFFILIATES;
     PROVIDED, HOWEVER, THE PROVISIONS OF THIS SECTION 8.04(B) SHALL NOT APPLY
     TO ANY ACTION, SUITS, PROCEEDINGS, CLAIMS, COSTS, LOSSES, LIABILITIES,
     DAMAGES, OR EXPENSES TO THE EXTENT, BUT ONLY TO THE EXTENT, CAUSED BY THE
     GROSS NEGLIGENCE OR WILLFUL MISCONDUCT OF THE PARTY SEEKING
     INDEMNIFICATION;

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<PAGE>
 
          (C) ENVIRONMENTAL INDEMNIFICATION.  INDEMNIFY AND HOLD HARMLESS FROM
     TIME TO TIME THE AGENTS AND THE LENDERS, EACH PERSON CLAIMING BY, THROUGH,
     UNDER OR ON ACCOUNT OF ANY OF THE FOREGOING AND THE RESPECTIVE DIRECTORS,
     OFFICERS, COUNSEL, EMPLOYEES, AGENTS, SUCCESSORS AND ASSIGNS OF EACH OF THE
     FOREGOING FROM AND AGAINST ANY AND ALL LOSSES, CLAIMS, COST RECOVERY
     ACTIONS, ADMINISTRATIVE ORDERS OR PROCEEDINGS, DAMAGES AND LIABILITIES
     (WHICH RELATE TO OR ARISE AS A RESULT OF THE LOANS OR ANY FINANCING
     DOCUMENT) TO WHICH ANY SUCH PERSON MAY BECOME SUBJECT AND INCLUDING ANY AND
     ALL LOSSES, CLAIMS, COST RECOVERY ACTIONS, ADMINISTRATIVE ORDERS OR
     PROCEEDINGS, DAMAGES AND LIABILITIES (WHICH RELATE TO OR ARISE AS A RESULT
     OF THE LOANS OR ANY FINANCING DOCUMENT) ARISING BY REASON OF THE ORDINARY
     NEGLIGENCE OF THE ADMINISTRATIVE AGENT, THE ADMINISTRATIVE AGENT FOR
     COMBINED LENDERS, THE DOCUMENTATION AGENT AND THE LENDERS, EACH PERSON
     CLAIMING BY, THROUGH, UNDER OR ON ACCOUNT OF ANY OF THE FOREGOING AND THE
     RESPECTIVE DIRECTORS, OFFICERS, COUNSEL, EMPLOYEES, AGENTS, SUCCESSORS AND
     ASSIGNS OF EACH OF THE FOREGOING (1) UNDER ANY ENVIRONMENTAL LAW APPLICABLE
     TO THE COMPANY OR ANY OF ITS SUBSIDIARIES OR ANY OF THEIR RESPECTIVE
     PROPERTIES, INCLUDING WITHOUT LIMITATION, THE TREATMENT OR DISPOSAL OF
     HAZARDOUS SUBSTANCES ON ANY OF THEIR RESPECTIVE PROPERTIES, (2) AS A RESULT
     OF THE BREACH OR NON-COMPLIANCE BY THE COMPANY OR ANY OF ITS SUBSIDIARIES
     WITH ANY ENVIRONMENTAL LAW APPLICABLE TO THE COMPANY OR ANY OF ITS
     SUBSIDIARIES, (3) DUE TO PAST OWNERSHIP BY THE COMPANY OR ANY OF ITS
     SUBSIDIARIES OF ANY OF THEIR RESPECTIVE PROPERTIES OR PAST ACTIVITY ON ANY
     OF THEIR RESPECTIVE PROPERTIES OR PAST ACTIVITY ON ANY OF THEIR RESPECTIVE
     PROPERTIES WHICH, THOUGH LAWFUL AND FULLY PERMISSIBLE AT THE TIME, COULD
     RESULT IN PRESENT LIABILITY, (4) THE PRESENCE, USE, RELEASE, STORAGE,
     TREATMENT OR DISPOSAL OF HAZARDOUS SUBSTANCES ON OR AT ANY OF THE
     PROPERTIES OWNED OR OPERATED BY THE COMPANY OR ANY OF ITS SUBSIDIARIES, OR
     (5) ANY OTHER ENVIRONMENTAL, HEALTH OR SAFETY CONDITION IN CONNECTION WITH
     THIS AGREEMENT, THE NOTES OR ANY OTHER FINANCING DOCUMENT; PROVIDED,
     HOWEVER, NO INDEMNITY SHALL BE AFFORDED UNDER THIS SECTION 8.04(C) IN
     RESPECT OF ANY PROPERTY FOR ANY OCCURRENCE ARISING PRIMARILY FROM THE ACTS
     OR OMISSIONS OF THE ADMINISTRATIVE AGENT, THE ADMINISTRATIVE AGENT FOR
     COMBINED LENDERS, THE DOCUMENTATION AGENT OR ANY LENDER DURING THE PERIOD
     AFTER WHICH SUCH PERSON, ITS SUCCESSORS OR ASSIGNS SHALL HAVE OBTAINED
     ACTUAL PHYSICAL POSSESSION OF SUCH PROPERTY (WHETHER BY FORECLOSURE OR DEED
     IN LIEU OF FORECLOSURE, AS MORTGAGEE-IN-POSSESSION OR OTHERWISE); AND

          (D) ENVIRONMENTAL WAIVER.  WITHOUT LIMITING THE FOREGOING PROVISIONS,
     THE COMPANY HEREBY DOES WAIVE, RELEASE AND COVENANT NOT TO BRING AGAINST
     ANY OF THE PERSONS INDEMNIFIED IN THIS SECTION 8.04 ANY DEMAND, CLAIM, COST
     RECOVERY ACTION OR LAWSUIT THEY MAY NOW OR HEREAFTER HAVE OR ACCRUE (WHICH
     RELATE TO OR ARISE AS A RESULT OF THE LOANS OR ANY FINANCING DOCUMENT)
     ARISING FROM (1) ANY ENVIRONMENTAL LAW NOW OR HEREAFTER ENACTED (INCLUDING
     THOSE APPLICABLE TO THE COMPANY OR ANY OF ITS SUBSIDIARIES) UNLESS THE ACTS
     OR OMISSIONS OF ANY SUCH PERSON OR THEIR RESPECTIVE SUCCESSORS AND ASSIGNS
     ARE THE PRIMARY CAUSE OF THE CIRCUMSTANCES GIVING RISE TO SUCH DEMAND, COST
     RECOVERY ACTION OR LAWSUIT, (2) THE PRESENCE, USE, RELEASE, STORAGE,
     TREATMENT OR DISPOSAL OF HAZARDOUS SUBSTANCES ON OR AT ANY OF THE
     PROPERTIES OWNED 

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<PAGE>
 
     OR OPERATED BY THE COMPANY OR ANY OF ITS SUBSIDIARIES, OR (3) THE BREACH OR
     NON-COMPLIANCE BY THE COMPANY WITH ANY ENVIRONMENTAL LAW OR ENVIRONMENTAL
     COVENANT APPLICABLE TO THE COMPANY OR ANY OF ITS SUBSIDIARIES, UNLESS THE
     ACTS OR OMISSIONS OF SUCH PERSON, ITS SUCCESSORS AND ASSIGNS ARE THE
     PRIMARY CAUSE OF THE CIRCUMSTANCES GIVING RISE TO SUCH DEMAND, CLAIM, COST
     RECOVERY ACTION OR LAWSUIT.

If and to the extent that the obligations of the Company under this Section are
unenforceable for any reason, the Company hereby agrees to make the maximum
contribution to the payment and satisfaction of such obligations which is
permissible under applicable law.  The Company's obligations under this Section
shall survive any termination of this Agreement and the payment of the Notes.

     Section 8.05 Right of Setoff. In addition to and not in limitation of all
rights of offset that any Lender may have under applicable law, each Lender or
other holder of a Note, or any other Lender Indebtedness shall, upon the
occurrence of any Event of Default and at any time during the continuance
thereof and whether or not such Lender or such holder has made any demand or the
Company's obligations are matured, have the right at any time and from time to
time, without notice to the Company (any such notice being expressly waived by
the Company) to set-off and apply any and all deposits (general or special, time
or demand, provisional or final) at any time held and other indebtedness at any
time owing by any Lender to or for the credit or the account of the Company
against any and all of the Lender Indebtedness owing to such Lender then
outstanding, subject to the provisions of Section 2.19.

     Section 8.06 Benefit of Agreement. The Notes, this Agreement and the other
Financing Documents shall be binding upon and inure to the benefit of and be
enforceable by the respective successors and assigns of the parties hereto,
provided that the Company may not assign or transfer any of its interest
hereunder or thereunder without the prior written consent of the Lenders.

     Section 8.07  Successors and Assigns; Participations and Assignments.

          (a) Any Lender may, in the ordinary course of its business and in
     accordance with applicable law, at any time sell to one or more banks,
     financial institutions, or investment funds ("Participants") participating
     interests in any Loan owing to such Lender, any Note held by such Lender,
     or any other interest of such Lender hereunder and under the other
     Financing Documents.  In the event of any such sale by a Lender of a
     participating interest to a Participant, such Lender's obligations under
     this Agreement to the other parties to this Agreement shall remain
     unchanged, such Lender shall remain solely responsible for the performance
     thereof, such Lender shall remain the holder of any such Loan (and any Note
     evidencing such Loan) for all purposes under this Agreement and the other
     Financing Documents and the Company and the Administrative Agent shall
     continue to deal solely and directly with such Lender in connection with
     such Lender's rights and obligations under this Agreement and the other
     Financing Documents.  Any agreement pursuant to which any Lender shall sell
     any such participating interest shall provide that such Lender shall retain
     the sole right and responsibility to exercise such Lender's rights and
     enforce the Company's obligations hereunder, including the right to consent
     to any amendment, supplement, modification or waiver of any provision of
     this Agreement or any of the other Financing Documents, provided that such
     participation agreement may provide that such Lender will not agree to any
     amendment, supplement, 

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<PAGE>
 
     modification or waiver described in clause (i) or (ii) of the proviso to
     the second sentence of Section 8.02(a) without the consent of the
     Participant. The Company agrees that each Lender shall be entitled to the
     benefits of Sections 2.15, 2.16, 2.18, 2.20 and 8.04 without regard to
     whether it has granted any participating interests, and that all amounts
     payable to a Lender under such Sections shall be determined as if such
     Lender had not granted any such participating interests. Each Participant
     shall have the rights of set-off against the Lender Indebtedness and
     similar rights or Liens to the same extent as may be available to the
     Administrative Agent or the Lenders.

          (b) Branch Offices, Affiliates,  Any Lender may make, carry or
     transfer Loans at, to or for the account of, any of its branch offices or
     the office of an Affiliate of such Lender.

          (c) Any Lender may, in the ordinary course of its business and in
     accordance with applicable law, at any time and from time to time assign to
     any Lender or any Affiliate thereof, or, with the prior written consent of
     the Company and the Administrative Agent (which in each case shall not be
     unreasonably withheld), to an additional bank, financial institution or
     investment fund (an "Assignee") all or any part of its rights and
     obligations under this Agreement and any Notes, including, without
     limitation, its Loans pursuant to an Assignment and Acceptance,
     substantially in the form of Exhibit F (each an "Assignment and
     Acceptance"), executed by such Assignee, such assigning Lender (and, in the
     case of any Assignee that is not then a Lender or an Affiliate thereof, by
     the Company and the Administrative Agent) and delivered to the
     Administrative Agent for its acceptance and recording in the Register;
     provided that (i) (unless the Company and the Administrative Agent
     otherwise consent in writing) no such transfer to an Assignee (other than a
     Lender, Original Lender or any Affiliate thereof) shall be in a principal
     amount less than (A) $5,000,000 for a transfer by any Tranche B Term Loan
     Lender, and (B) $10,000,000 in the aggregate for a transfer by any Tranche
     A Term Loan Lender (or, if less than the applicable amount required by
     clause (A) or (B), the full amount of such assigning Lender's Loans) and
     (ii) if any Lender assigns all or any part of its rights and obligations
     under this Agreement to one of its Affiliates in connection with or in
     contemplation of the sale or other disposition of its interest in such
     Affiliate, the Company's and the Administrative Agent's prior written
     consent shall be required for such assignment.  Upon such execution,
     delivery, acceptance and recording, from and after the effective date
     determined pursuant to such Assignment and Acceptance, (x) the Assignee
     thereunder shall be a party hereto and, to the extent provided in such
     Assignment and Acceptance, have the rights and obligations of a Lender
     hereunder with Loans, as set forth therein, and (y) the assigning Lender
     thereunder shall be released from its obligations under this Agreement to
     the extent that such obligations shall have been expressly assumed by the
     Assignee pursuant to such Assignment and Acceptance (and, in the case of an
     Assignment and Acceptance covering all or the remaining portion of an
     assigning Lender's rights and obligations under this Agreement, such
     assigning Lender shall cease to be a party hereto but shall nevertheless
     continue to be entitled to the benefits of Sections 2.16, 2.18, 2.20 and
     8.04).  Notwithstanding the foregoing, no Assignee, which as of the date of
     any assignment to it pursuant to this Section 8.07(c) would be entitled to
     receive any greater payment under Section 2.16 or 2.20 than the assigning
     Lender would have been entitled to receive as of such date under such
     Sections with respect to the rights assigned, shall be entitled to receive
     such payments unless the Company has expressly consented in writing to
     waive the benefit of this provision at the time of the Assignment.

                                       89
<PAGE>
 
          (d) The Administrative Agent, on behalf of the Company, shall maintain
     at its address referred to in Section 8.01 a copy of each Assignment and
     Acceptance delivered to it and a register (the "Register") for the
     recordation of the names and addresses of the Lenders and the principal
     amount of the Loans owing to, and any Notes evidencing such Loans owned by,
     each Lender from time to time.  Notwithstanding anything in this Agreement
     to the contrary, the Company, the Administrative Agent, the Administrative
     Agent For Combined Lenders and the Lenders shall treat each Person whose
     name is recorded in the Register as the owner of any Loan and any Notes
     recorded therein for all purposes of this Agreement.  The Register shall be
     available for inspection by the Company or any Lender at any reasonable
     time and from time to time upon reasonable prior notice.

          (e) Notwithstanding anything in this Agreement to the contrary, no
     assignment under Section 8.07(c) of any rights or obligations under or in
     respect of the Loans or the Notes evidencing such Loans shall be effective
     unless and until the Administrative Agent shall have recorded the
     assignment in the Register pursuant to this Section 8.07(e).  Upon its
     receipt of an Assignment and Acceptance executed by an assigning Lender and
     an Assignee (and, in the case of an Assignee that is not then a Lender or
     an Affiliate thereof, by the Company and the Administrative Agent),
     together with payment to the Administrative Agent of a registration and
     processing fee of $3,500 (which fee need not be paid in the case of any
     assignment to an Affiliate of the assigning Lender and which shall not be a
     cost subject to reimbursement under Section 8.04 or otherwise hereunder),
     the Administrative Agent shall (i) promptly accept such Assignment and
     Acceptance and (ii) on the effective date determined pursuant thereto
     record the information contained therein in the Register and give prompt
     notice of such acceptance and recordation to the Lenders and the Company.
     On or prior to such effective date, the assigning Lender shall surrender
     any outstanding Notes held by it, all or a portion of which are being
     assigned, and the Company, shall, upon the request to the Administrative
     Agent by the assigning Lender or the Assignee, as applicable, execute and
     deliver to the Administrative Agent (in exchange for the outstanding Notes
     of the assigning Lender) a new Tranche A Term Note and/or Tranche B Term
     Note, as the case may be, to the order of such Assignee in an amount equal
     to (i) in the case of a Tranche A Term Note, the amount of such Assignee's
     Tranche A Term Loans and (ii) in the case of a Tranche B Term Note, the
     amount of such Assignee's Tranche B Term Loans, in each case with respect
     to the relevant Loan after giving effect to such Assignment and Acceptance
     and, if the assigning Lender has retained a Loan hereunder, a new Tranche A
     Term Note and/or Tranche B Term Note, as the case may be, to the order of
     the assigning Lender in an amount equal to (i) in the case of a Tranche A
     Term Note,  the amount of such Lender's Tranche A Term Loans and (ii) in
     the case of a Tranche B Term Note, the amount of such Assignee's Tranche B
     Term Loans, in each case with respect to the relevant Loan after giving
     effect to such Assignment and Acceptance.  Any such new Notes shall be
     dated such effective date and shall otherwise be in the form of the Note
     replaced thereby.  Any Notes surrendered by the assigning Lender shall be
     returned by the Administrative Agent to the Company marked "canceled".

          (f) The Company authorizes each Lender to disclose to any participant
     or Assignee (each, a "Transferee") and any prospective Transferee,
     provided, that, any such Transferee or potential Transferee has signed a
     confidentiality agreement substantially similar to the provisions of
     Section 8.13, any and all information in such Lender's possession
     concerning the Company and its Affiliates which has been delivered to such
     Lender by or on behalf of the Company pursuant to this Agreement 

                                       90
<PAGE>
 
     or which has been delivered to such Lender by or on behalf of the Company
     in connection with such Lender's credit evaluation of the Company and its
     Affiliates prior to becoming a party to this Agreement. No assignment or
     participation made or purported to be made to any Transferee shall be
     effective without the prior written consent of the Company if it would
     require it to make any filing with any Governmental Authority or qualify
     any Loan or Note under the laws of any jurisdiction, and the Company shall
     be entitled to request and receive such information and assurances as it
     may reasonably request from any Lender or any Transferee to determine
     whether any such filing or qualification is required or whether any
     assignment or participation is otherwise in accordance with applicable law.

          (g) Any Lender may at any time grant, pledge or assign a security
     interest in all or a portion of its rights under this Agreement to secure
     obligations of such Lender, including any such grant, pledge or assignment
     to a Federal Reserve Bank, and this Section 8.07 shall not apply to any
     such grant, pledge or assignment of a security interest; provided that no
     such grant, pledge or assignment of a security interest shall release a
     Lender from any of its obligations hereunder or substitute any such
     assignee for such Lender as a party hereto.

     Section 8.08  Governing Law; Submission to Jurisdiction; Etc.
 
          (A) GOVERNING LAW.  THIS AGREEMENT AND THE RIGHTS AND OBLIGATIONS OF
     THE PARTIES HEREUNDER AND UNDER THE NOTES SHALL BE CONSTRUED IN ACCORDANCE
     WITH AND BE GOVERNED BY THE LAWS OF THE STATE OF NEW YORK (INCLUDING
     SECTION 5-1401 OF THE NEW YORK GENERAL OBLIGATIONS LAW, OR ANY SIMILAR
     SUCCESSOR PROVISION THERETO, BUT EXCLUDING ALL OTHER CONFLICT-OF-LAWS
     RULES)AND TO THE EXTENT CONTROLLING, LAWS OF THE UNITED STATES OF AMERICA.

          (B) SUBMISSION TO JURISDICTION.  ANY LEGAL ACTION OR PROCEEDING WITH
     RESPECT TO THIS AGREEMENT, THE NOTES OR THE OTHER FINANCING DOCUMENTS MAY
     BE BROUGHT IN THE COURTS OF THE STATE OF NEW YORK OR OF THE UNITED STATES
     OF AMERICA FOR THE SOUTHERN DISTRICT OF NEW YORK, AND, BY EXECUTION AND
     DELIVERY OF THIS AGREEMENT, THE COMPANY HEREBY ACCEPTS FOR ITSELF AND IN
     RESPECT OF ITS PROPERTY, GENERALLY AND UNCONDITIONALLY, THE JURISDICTION OF
     THE AFORESAID COURTS.  THE COMPANY HEREBY IRREVOCABLY WAIVES ANY OBJECTION,
     INCLUDING, BUT NOT LIMITED TO, ANY OBJECTION TO THE LAYING OF VENUE OR
     BASED ON THE GROUNDS OF FORUM NON CONVENIENS, WHICH IT MAY NOW OR HEREAFTER
     HAVE TO THE BRINGING OF ANY SUCH ACTION OR PROCEEDING IN SUCH RESPECTIVE
     JURISDICTIONS.

          (C) WAIVER OF JURY TRIAL.  TO THE MAXIMUM EXTENT ALLOWED BY APPLICABLE
     LAW, EACH OF THE COMPANY, THE AGENTS AND THE LENDERS (i) IRREVOCABLY AND
     UNCONDITIONALLY WAIVE TRIAL BY JURY IN ANY LEGAL ACTION OR PROCEEDING
     RELATING TO ANY FINANCING DOCUMENT AND FOR ANY COUNTERCLAIM THEREIN; (ii)
     IRREVOCABLY WAIVE ANY RIGHT IT MAY HAVE TO CLAIM OR RECOVER IN ANY SUCH
     LITIGATION ANY SPECIAL, EXEMPLARY, PUNITIVE OR CONSEQUENTIAL DAMAGES, OR
     DAMAGES OTHER THAN, OR IN ADDITION TO, ACTUAL DAMAGES; (iii) CERTIFY THAT
     NO PARTY HERETO NOR ANY REPRESENTATIVE OR COUNSEL FOR ANY 

                                       91
<PAGE>
 
     PARTY HERETO HAS REPRESENTED, EXPRESSLY OR OTHERWISE, OR IMPLIED THAT SUCH
     PARTY WOULD NOT, IN THE EVENT OF LITIGATION, SEEK TO ENFORCE THE FOREGOING
     WAIVERS; AND (IV) ACKNOWLEDGE THAT IT HAS BEEN INDUCED TO ENTER INTO THIS
     AGREEMENT, THE OTHER FINANCING DOCUMENTS AND THE TRANSACTIONS CONTEMPLATED
     HEREBY AND THEREBY BASED UPON, AMONG OTHER THINGS, THE MUTUAL WAIVERS AND
     CERTIFICATIONS CONTAINED IN THIS SECTION.

          (d) Designation of Process Agent.  The Company hereby irrevocably
     designates CT Corporation System, with an office on the date hereof at 1633
     Broadway, New York, New York, 10019, as the designee, appointee and process
     agent of the Company to receive, for and on behalf of the Company, service
     of process in such respective jurisdictions in any legal action or
     proceeding with respect to this Agreement, the Notes, or the other
     Financing Documents.  It is understood that a copy of such process served
     on such agent will be promptly forwarded by mail to the Company at its
     address set forth opposite its signature below, but the failure of the
     Company to receive such copy shall not affect in any way the service of
     such process.  The Company further irrevocably consents to the service of
     process of any of the aforementioned courts in any such action or
     proceeding by the mailing of copies thereof by registered or certified
     mail, postage prepaid, to the Company at its said address, such service to
     become effective 30 days after such mailing.

          (e) Service of Process.  Nothing herein shall affect the right of the
     Administrative Agent or any Lender or any holder of a Note to serve process
     in any other manner permitted by law or to commence legal proceedings or
     otherwise proceed against the Company in any other jurisdiction.

     Section 8.09 Independent Nature of Lenders' Rights. The amounts payable at
any time hereunder to each Lender shall be a separate and independent debt, and
each Lender shall be entitled to protect and enforce its rights arising out of
this Agreement, and it shall not be necessary for any other Lender to be joined
as an additional party in any proceeding for such purpose.

     Section 8.10 Invalidity. In the event that any one or more of the
provisions contained in the Notes, this Agreement or in any other Financing
Document shall, for any reason, be held invalid, illegal or unenforceable in any
respect, (i) the Company agrees that such invalidity, illegality or
unenforceability shall not affect any other provision of the Notes, this
Agreement or any other Financing Document and (ii) the Company and the
Administrative Agent (acting on behalf and at the direction of the Lenders) will
negotiate in good faith to amend such provision so as to be legal, valid, and
enforceable.

     Section 8.11 Renewal, Extension or Rearrangement. All provisions of this
Agreement and of any other Financing Documents relating to the Notes or other
Lender Indebtedness shall apply with equal force and effect to each and all
promissory notes hereafter executed which in whole or in part represent a
renewal, extension for any period, increase or rearrangement of any part of the
Lender Indebtedness originally represented by the Notes, or of any part of such
other Lender Indebtedness.

     Section 8.12 Interest. It is the intention of the parties hereto to conform
strictly to usury laws applicable to the Administrative Agent, the Documentation
Agent and the Lenders (collectively, the "Financing Parties") and the
Transactions. Accordingly, if the Transactions would be usurious as to any
Financing Party 

                                       92
<PAGE>
 
under laws applicable to it, then, notwithstanding anything to the contrary in
the Notes, this Agreement or in any other Financing Document or agreement
entered into in connection with the Transactions or as security for the Notes,
it is agreed as follows: (i) the aggregate of all consideration which
constitutes interest under law applicable to any Financing Party that is
contracted for, taken, reserved, charged or received by such Financing Party
under the Notes, this Agreement or under any of such other Financing Documents
or agreements or otherwise in connection with the Transactions shall under no
circumstances exceed the maximum amount allowed by such applicable law, (ii) in
the event that the maturity of the Notes is accelerated for any reason, or in
the event of any required or permitted prepayment, then such consideration that
constitutes interest under law applicable to any Financing Party may never
include more than the maximum amount allowed by such applicable law, and (iii)
excess interest, if any, provided for in this Agreement or otherwise in
connection with the Transactions shall be cancelled automatically by such
Financing Party and, if theretofore paid, shall be credited by such Financing
Party on the principal amount of the Company's Indebtedness to such Financing
Party (or, to the extent that the principal amount of the Company's Indebtedness
to such Financing Party shall have been or would thereby be paid in full,
refunded by such Financing Party to the Company). The right to accelerate the
maturity of the Notes does not include the right to accelerate any interest
which has not otherwise accrued on the date of such acceleration, and the
Financing Parties do not intend to collect any unearned interest in the event of
acceleration. All sums paid or agreed to be paid to the Financing Parties for
the use, forbearance or detention of sums included in the Lender Indebtedness
shall, to the extent permitted by law applicable to such Financing Party, be
amortized, prorated, allocated and spread throughout the full term of the Notes
until payment in full so that the rate or amount of interest on account of the
Lender Indebtedness does not exceed the applicable usury ceiling, if any. As
used in this Section, the terms "applicable law" or "laws applicable to any
Financing Party" shall mean the law of any jurisdiction whose laws may be
mandatorily applicable notwithstanding other provisions of this Agreement, or
law of the United States of America applicable to any Financing Party and the
Transactions which would permit such Financing Party to contract for, charge,
take, reserve or receive a greater amount of interest than under such
jurisdiction's law. To the extent that Article 5069-1.04 of the Texas Revised
Civil Statutes is relevant to any Financing Party for the purpose of determining
the Highest Lawful Rate, such Financing Party hereby elects to determine the
applicable rate ceiling under such Article by the indicated (weekly) rate
ceiling from time to time in effect, subject to such Financing Party's right
subsequently to change such method in accordance with applicable law.

     Section 8.13 Confidential Information. The Administrative Agent and each
Lender agree that all documentation and other information made available by the
Company to the Administrative Agent or such Lender under the terms of this
Agreement shall (except to the extent such documentation or other information is
publicly available or hereafter becomes publicly available other than by action
of the Administrative Agent or such Lender, or was theretofore known or
hereinafter becomes known to the Administrative Agent or such Lender independent
of any disclosure thereto by the Company) be held in the strictest confidence by
the Administrative Agent or such Lender and used solely in the administration
and enforcement of the Loans from time to time outstanding from such Lender to
the Company and in the prosecution of defense of legal proceedings arising in
connection herewith; provided that (i) the Administrative Agent or such Lender
may disclose documentation and information to the Administrative Agent and/or to
any other Lender which is a party to this Agreement or any Affiliates thereof or
to any party to the Original Credit Agreement or any Affiliates thereof, and
(ii) the Administrative Agent or such Lender may disclose such documentation or
other information to any other bank or other Person to which such Lender sells
or proposes to make an assignment or sell a participation in its Loans hereunder
if such other bank or Person, prior to such disclosure, agrees in 

                                       93
<PAGE>
 
writing to be bound by the terms of a confidentiality agreement substantially
similar to the provisions of this Section 8.13. Notwithstanding the foregoing,
nothing contained herein shall be construed to prevent the Administrative Agent
or a Lender from (a) making disclosure of any information (i) if required to do
so by applicable law or regulation, (ii) to any governmental agency or
regulatory body (including any self-regulatory agency or body) having or
claiming to have authority to regulate or oversee any aspect of such Lender's
business or that of such Lender's corporate parent or affiliates in connection
with the exercise of such authority or claimed authority, (iii) pursuant to any
subpoena or if otherwise compelled in connection with any litigation or
administrative proceeding, (iv) to correct any false or misleading information
which may become public concerning such Person's relationship to the Company, or
(v) to the extent the Administrative Agent or such Lender or its counsel deems
necessary or appropriate to effect or preserve its security for any Lender
Indebtedness or to enforce any remedy provided in the Financing Documents, the
Notes or this Agreement or otherwise available by law; or (b) making, on a
confidential basis, such disclosures as such Lender reasonably deems necessary
or appropriate to its legal counsel or accountants (including outside auditors).
If the Administrative Agent or such Lender is compelled to disclose such
confidential information in a proceeding requesting such disclosure, the
Administrative Agent or such Lender shall seek to obtain assurance that such
confidential treatment will be accorded such information; provided, however,
that the Lender shall have no liability for the failure to obtain such
treatment.

     Section 8.14 ENTIRE AGREEMENT. THE NOTES, THIS AGREEMENT AND THE OTHER
FINANCING DOCUMENTS EMBODY THE ENTIRE AGREEMENT AND UNDERSTANDING BETWEEN THE
AGENTS OR THE LENDERS AND THE OTHER RESPECTIVE PARTIES HERETO AND THERETO AND
SUPERSEDE ALL PRIOR AGREEMENTS AND UNDERSTANDINGS BETWEEN SUCH PARTIES RELATING
TO THE SUBJECT MATTER HEREOF AND THEREOF AND MAY NOT BE CONTRADICTED BY EVIDENCE
OF PRIOR, CONTEMPORANEOUS AGREEMENTS OF THE PARTIES. THERE ARE NO UNWRITTEN ORAL
AGREEMENTS BETWEEN THE PARTIES.

     Section 8.15 Attachments. The exhibits, schedules and annexes attached to
this Agreement are incorporated herein and shall be considered a part of this
Agreement for the purposes stated herein, except that in the event of any
conflict between any of the provisions of such exhibits and the provisions of
this Agreement, the provisions of this Agreement shall prevail.

     Section 8.16 Counterparts. This Agreement may be executed in any number of
counterparts and by the different parties hereto on separate counterparts, each
of which when so executed and delivered shall be an original but all of which
shall together constitute one and the same instrument.

     Section 8.17 Survival of Indemnities. The Company's obligations under
Sections 2.16, 2.18, 2.20 and 8.04 shall survive the payment in full of the
Loans.

     Section 8.18 Headings Descriptive. The headings of the several sections and
subsections of this Agreement, and the Table of Contents, are inserted for
convenience only and shall not in any way affect the meaning or construction of
any provision of this Agreement.

     Section 8.19 Satisfaction Requirement. If any agreement, certificate,
instrument or other writing, or any action taken or to be taken, is by the terms
of this Agreement required to be satisfactory to any party, 

                                       94
<PAGE>
 
the determination of such satisfaction shall be made by such party in its sole
and exclusive judgment exercised reasonably and in good faith.

     SECTION 8.20 EXCULPATION PROVISIONS. EACH OF THE PARTIES HERETO
SPECIFICALLY AGREES THAT IT HAS A DUTY TO READ THIS AGREEMENT AND THE OTHER
FINANCING DOCUMENTS AND AGREES THAT IT IS CHARGED WITH NOTICE AND KNOWLEDGE OF
THE TERMS OF THIS AGREEMENT AND THE OTHER FINANCING DOCUMENTS; THAT IT HAS IN
FACT READ THIS AGREEMENT AND IS FULLY INFORMED AND HAS FULL NOTICE AND KNOWLEDGE
OF THE TERMS, CONDITIONS AND EFFECTS OF THIS AGREEMENT; THAT IT HAS BEEN
REPRESENTED BY LEGAL COUNSEL OF ITS CHOICE THROUGHOUT THE NEGOTIATIONS PRECEDING
ITS EXECUTION OF THIS AGREEMENT AND THE OTHER FINANCING DOCUMENTS; AND HAS
RECEIVED THE ADVICE OF ITS ATTORNEYS IN ENTERING INTO THIS AGREEMENT AND THE
OTHER FINANCING DOCUMENTS; AND THAT IT RECOGNIZES THAT CERTAIN OF THE TERMS OF
THIS AGREEMENT AND THE OTHER FINANCING DOCUMENTS RESULT IN ONE PARTY ASSUMING
THE LIABILITY INHERENT IN SOME ASPECTS OF THE TRANSACTION AND RELIEVING THE
OTHER PARTY OF ITS RESPONSIBILITY FOR SUCH LIABILITY. EACH PARTY HERETO AGREES
AND COVENANTS THAT IT WILL NOT CONTEST THE VALIDITY OR ENFORCEABILITY OF ANY
EXCULPATORY PROVISION OF THIS AGREEMENT AND THE OTHER FINANCING DOCUMENTS ON THE
BASIS THAT THE PARTY HAD NO NOTICE OR KNOWLEDGE OF SUCH PROVISION OR THAT THE
PROVISION IS NOT "CONSPICUOUS."

     Section 8.21 Secured Affiliate. For purposes of this Agreement and all
other Financing Documents (other than applicable Hedge Agreements), if a Secured
Affiliate of a Lender has entered into one or more Hedge Agreements with the
Company or any its Subsidiaries, then to the extent that such Secured Affiliate
has rights or obligations (or if the affiliated Lender, rather than the Secured
Affiliate, were the counter-party to the applicable Hedge Agreement, such rights
or obligations that such Lender has) hereunder or under any other Financing
Document (other than applicable Hedge Agreements), such affiliated Lender shall
be the agent and attorney-in-fact for such Secured Affiliate with regard to any
such rights and obligations, or deemed rights and obligations, as if such Lender
were the counter-party to the applicable Hedge Agreement including, but not
limited to, the following: (a) all distributions or payments in respect of
Collateral owing to such Secured Affiliate shall be distributed or paid to such
Lender, (b) all representations, statements or disclaimers made herein or in any
Financing Document by or to such Lender shall be deemed to have been made by or
to such Secured Affiliate, (c) all obligations incurred by such Lender that
would have been incurred by the Secured Affiliate if it were a party hereto
(including, but not limited to, obligations under Section 7.06) shall be the
obligations of such Lender, and such Lender, as the agent and attorney-in-fact
of its Secured Affiliate, will make any and all payments owing to the
Administrative Agent with respect to such obligations or deemed obligations of
its Secured Affiliate. Each such Lender represents, warrants and covenants to
and with the Administrative Agent that such Lender has, or at all applicable
times will have, full power and authority to act as agent and attorney-in-fact
for its Secured Affiliates. Under no circumstance shall any Secured Affiliate
have any voting rights hereunder and the voting rights of any affiliated Lender
shall not be increased by virtue of the obligations owing to any such Secured
Affiliate.

     Section 8.22 Intercreditor Agreement. The Administrative Agent is hereby
authorized and directed to execute and deliver on behalf of the Lenders an
intercreditor agreement of even date herewith (as amended, modified or
supplemented, the "Intercreditor Agreement") in the form of Exhibit G. Until the
Original Lender Indebtedness has been indefeasibly paid in full, to the extent
the Intercreditor Agreement modifies or 

                                       95
<PAGE>
 
supplements any terms or provisions hereof, it shall constitute an amendment and
modification to, and supplement of, this Agreement. Each Lender that is now, or
hereafter becomes, a party to this Agreement agrees to be bound by the terms and
provisions of the Intercreditor Agreement.

     Section 8.23 Merger of Credit Agreement. The Lenders agree that this
Agreement and the Original Credit Agreement may be combined into one agreement,
subject to the Required Lenders approving the documentation to be executed in
connection therewith.

                                       96
<PAGE>
 
     IN WITNESS WHEREOF, the parties hereto have caused this instrument to be
duly executed as of the date first above written.


COMPANY:                      STERLING CHEMICALS, INC.


                              By: /s/ JIM P. WISE
                                 -----------------------------------------
                                 Jim P. Wise
                                 Vice President, Finance and Chief 
                                  Financial Officer

                              Address:
                              1200 Smith Street, Suite 1900
                              Houston, Texas  77002
                              Attention:  Mr. Jim P. Wise
                              Telephone:  (713) 654-9599
                              Telecopy:   (713) 654-9552

                              With Copy To:
                              Attention:  Mr. Stewart H. Yonts
                              Telephone:  (713) 654-9547
                              Telecopy:   (713) 654-9552

ADMINISTRATIVE AGENT,         TEXAS COMMERCE BANK
DOCUMENTATION AGENT,          NATIONAL ASSOCIATION
AND THE LENDERS:              Individually, as a Lender and as
                              Administrative Agent


                              By: /s/ P. STAN BURGE
                                 -----------------------------------------
                                 P. Stan Burge
                                 Vice President

                              Address:
                              c/o Chase Securities Inc.
                              712 Main Street
                              Houston, Texas  77002
                              Attention:  Ms. Martha Gurwit
                              Telephone:  (713) 216-6387
                              Telecopy:   (713) 216-4986

                              With Copy To:
                              Attention:  Ms. Debra Harris
                              Telephone:  (713) 216-4117
                              Telecopy:   (713) 216-5733

                             [Signature Page - 1]
<PAGE>
 
                              CREDIT SUISSE FIRST BOSTON,
                              as Documentation Agent


                              By: /s/ JAMES P. MORAN
                                 -----------------------------------------
                                 Name:  James P. Moran
                                 Title: Director


                              By: /s/ J. SCOTT KARRO
                                 -----------------------------------------
                                 Name:  J. Scott Karro
                                 Title: Associate

                              Address:
                              11 Madison Avenue, 19th Floor
                              New York, New York  10010-3629
                              Attention:  Mr. James P. Moran
                              Telephone:  (212) 325-9176
                              Telecopy:   (212) 325-8350

                              CREDIT SUISSE FIRST BOSTON,
                              individually as a Lender


                              By: /s/ JAMES P. MORAN
                                 -----------------------------------------
                                 Name:  James P. Moran
                                 Title: Director


                              By: /s/ J. SCOTT KARRO
                                 -----------------------------------------
                                 Name:  J. Scott Karro
                                 Title: Associate

                              Address:
                              11 Madison Avenue, 19th Floor
                              New York, New York  10010-3629
                              Attention:  Ms. Yvette McQueen
                              Telephone:  (212) 325-9096
                              Telecopy:   (212) 325-8319

                             [Signature Page - 2]
<PAGE>
 
                              ABN AMRO BANK N.V.
                              Houston Agency


                              By:  ABN AMRO NORTH AMERICA, INC.
                                   as Agent


                                   By: /s/ GORDON CHANG
                                      ------------------------------------
                                      Name:  Gordon Chang
                                      Title: Vice President & Director


                                   By: /s/ MICHAEL W. DePRIEST
                                      ------------------------------------
                                      Name:  Michael W. DePriest
                                      Title: Vice President & Director

                              Address:
                              Three Riverway, Suite 1700
                              Houston, Texas  77056
                              Attention:  Mr. Gordon Chang
                              Telephone:  (713) 964-3322
                              Telecopy:   (713) 629-7533

                             [Signature Page - 3]
<PAGE>
 
                              THE BANK OF NOVA SCOTIA


                              By: /s/ M. D. SMITH
                                 -----------------------------------------
                                 Name:  M. D. Smith
                                 Title: Agent

                              Address:
                              Atlanta Agency
                              600 Peachtree Street Northeast
                              Suite 2700
                              Atlanta, Georgia  30308
                              Attention:  Mr. F.C.H. Ashby
                              Telephone:  (404) 877-1500
                              Telecopy:   (404) 888-8998

                              With Copy To:
                              1100 Louisiana Street, Suite 3000
                              Houston, Texas  77002
                              Attention:  Mr. Bryan Bulawa
                              Telephone:  (713) 759-3427
                              Telecopy:   (713) 752-2425

                             [Signature Page - 4]
<PAGE>
 
                              BANK OF SCOTLAND


                              By: /s/ CATHERINE M. ONIFFREY
                                 -----------------------------------------
                                Name:  Catherine M. Oniffrey
                                Title: Vice President
                                       Bank of Scotland

                              Address:
                              565 Fifth Avenue
                              New York, New York  10017
                              Attention:  Mr. John Kelly
                              Telephone:  (212) 450-0830
                              Telecopy:   (212) 682-5720

                             [Signature Page - 5]
<PAGE>
 
                              BHF-BANK AKTIENGESELLSCHAFT


                              By: /s/ JOHN SYKES
                                 -----------------------------------------
                                Name:  John Sykes
                                Title: Assistant Vice President


                              By: /s/ PERRY FORMAN
                                 -----------------------------------------
                                Name:  Perry Forman
                                Title: Vice President

                              Address:
                              590 Madison Avenue
                              New York , New York  10022-2540
                              Attention:   Ms. Linda Pace
                              Telephone:  (212) 756-5915
                              Telecopy:   (212) 756-5536

                             [Signature Page - 6]
<PAGE>
 
                              THE FIRST NATIONAL BANK OF CHICAGO


                              By: /s/ DIXON P. SCHULTZ
                                 -----------------------------------------
                                Name:  Dixon P. Schultz
                                Title: Vice President

                              Address:
                              One First National Plaza, MS 0634, 1-10
                              Chicago, Illinois  60670
                              Attention:  Mr. Mike Lorenzi
                              Telephone:  (312) 732-8573
                              Telecopy:   (312) 732-4840

                              With Copy To:
                              1100 Louisiana Street, Suite 3200
                              Houston, Texas  77002
                              Attention:  Ms. Dixon Schultz
                              Telephone:  (713) 654-7329
                              Telecopy:   (713) 654-7370

                             [Signature Page - 7]
<PAGE>
 
                              THE CIT GROUP/BUSINESS CREDIT, INC.


                              By: /s/ DAN HUGHES
                                 -----------------------------------------
                                Name:  Dan Hughes
                                Title: Vice President

                              Address:
                              5420 LBJ Freeway
                              Two Lincoln Centre, #200
                              Dallas, Texas  75240
                              Attention:  Mr. Dan Hughes
                              Telephone:  (972) 455-1665
                              Telecopy:   (972) 455-1690

                             [Signature Page - 8]
<PAGE>
 
                              HIBERNIA NATIONAL BANK


                              By: /s/ COLLEEN SMITH
                                 -----------------------------------------
                                Name:  Colleen Smith
                                Title: Vice President

                              Address:
                              313 Carondelet Street, 13th Floor
                              New Orleans, Louisiana  70130
                              Attention:  Ms. Trudy Nelson
                              Telephone:  (504) 533-3213
                              Telecopy:   (504) 533-5434

                             [Signature Page - 9]
<PAGE>
 
                              NATIONAL BANK OF CANADA


                              By: /s/ LARRY L. SEARS
                                 -----------------------------------------
                                Name:  Larry L. Sears
                                Title: Group Vice President


                              By: /s/ DOUG CLARK
                                 -----------------------------------------
                                Name:  Doug Clark
                                Title: Vice President

                              Address:
                              125 West 55th Street
                              23rd Floor
                              New York, New York  10019
                              Attention:  Ms. Eleanor Valentine
                              Telephone:  (212) 632-8820
                              Telecopy:   (212) 632-8736

                              With Copy To:
                              2121 San Jacinto, #1850
                              Dallas, Texas  75201
                              Attention:  Mr. Douglas Clark
                              Telephone:  (214) 871-1265
                              Telecopy:   (214) 871-2015

                             [Signature Page - 10]
<PAGE>
 
                              OCTAGON CREDIT INVESTORS LOAN PORTFOLIO
                              (a unit of The Chase Manhattan Bank)


                              By: /s/ JOYCE C. DeLUCCA
                                 -----------------------------------------
                                Name:  Joyce C. DeLucca
                                Title: Managing Director

                              Address:
                              380 Madison Avenue, 12th Floor
                              New York, New York  10017
                              Attention:  Ms. Joyce Delucca
                              Telephone:  (212) 622-3104
                              Telecopy:   (212) 622-3797

                              With Copy To:
                              One Chase Manhattan Plaza
                              New York, New York  10081
                              Attention:  Mr. Joseph Nerich
                              Telephone:  (212) 552-7247
                              Telecopy:  (212) 552-5642

                             [Signature Page - 11]
<PAGE>
 
                              VAN KAMPEN AMERICAN CAPITAL PRIME RATE INCOME
                              TRUST


                              By: /s/ JEFFREY W. MAILLET
                                 -----------------------------------------
                                Name:  Jeffrey W. Maillet
                                Title: Senior Vice President & Director

                              Address:
                              One Parkview Plaza
                              Oakbrook Terrace, Illinois  60181
                              Attention:  Mr. Jeffrey Maillet
                              Telephone:  (630) 684-6438
                              Telecopy:   (630) 684-6740/6741

                             [Signature Page - 12]
<PAGE>
 
                              PARIBAS CAPITAL FUNDING LLC


                              By: /s/ 
                                 -----------------------------------------
                                Name:
                                Title:

                              Address:
                              787 Seventh Avenue, 32nd Floor
                              New York, New York  10019
                              Attention:  Mr. Thomas Liu
                              Telephone:  (212) 841-2295
                              Telecopy:   (212) 841-2363

                             [Signature Page - 13]
<PAGE>
 
                              MERRILL LYNCH SENIOR FLOATING RATE FUND, INC.


                              By: /s/ ANTHONY R. CLEMENTE
                                 -----------------------------------------
                                Name:  Anthony R. Clemente
                                Title: Authorized Signatory

                              Address:
                              800 Scudders Mill Road - Area 2C
                              Plainsboro, New Jersey  08536
                              Attention:  Ms. Jill Montanye
                              Telephone:  (609) 282-3102
                              Telecopy:   (609) 282-2550

                              With Copy To:
                              Custodian Bank:
                              Bank of New York
                              90 Washington Street, 12th Floor
                              New York, New York  10286
                              Attention:  Ms. Michelle Moore
                              Telephone:  (212) 495-2929
                              Telecopy:   (212) 495-2935/2936/2937

                              MLAM Accounting
                              500 College Road - 4E
                              Plainsboro, New Jersey  08536
                              Attention:  Mr. John Dugan
                              Telephone:  (212) 282-7705
                              Telecopy:   (212) 282-7616

                             [Signature Page - 14]

<PAGE>
 

                                                                     EXHIBIT 4.4

                     SECOND AMENDMENT TO CREDIT AGREEMENT


     THIS SECOND AMENDMENT TO CREDIT AGREEMENT ("Second Amendment") dated as of
March 31, 1997 (the "Second Amendment Effective Date") is made and entered into
by and among STERLING CHEMICALS, INC., a Delaware corporation (the "Company"),
TEXAS COMMERCE BANK NATIONAL ASSOCIATION, individually, as an Issuing Bank and
as Administrative Agent and CREDIT SUISSE FIRST BOSTON (formerly known as Credit
Suisse), individually, as an Issuing Bank and as Documentation Agent and the
other financial institutions signatories hereto.


                             INTRODUCTORY STATEMENT
                             ----------------------

     The Company has entered into a credit agreement dated as of June 21, 1996,
among the Company, Texas Commerce Bank National Association, individually, as an
Issuing Bank and as Administrative Agent, Credit Suisse First Boston (formerly
known as Credit Suisse), individually, as an Issuing Bank and as Documentation
Agent, and the financial institutions parties thereto, as amended by the First
Amendment to Credit Agreement (the "First Amendment") dated as of 
January 31, 1997 (as amended by the First Amendment and this Second Amendment,
the "Credit Agreement").

     The parties to the Credit Agreement and the parties to that certain Credit
Agreement dated as of January 31, 1997, by and among the Company, Texas Commerce
Bank National Association, individually, and as Administrative Agent, Credit
Suisse First Boston, individually, and as Documentation Agent, and the financial
institutions parties thereto (the "AFB Acquisition Credit Agreement") have
entered into an Intercreditor Agreement dated as of January 31, 1997 (the
"Intercreditor Agreement") pursuant to which the parties thereto agreed to share
the proceeds of prepayments of term loans made by the Company in accordance with
the terms thereof.

     The Company intends to issue at least $150,000,000 of additional senior
subordinated notes and will use the proceeds of such senior subordinated notes
to voluntarily prepay Term Loans pursuant to Section 2.10(c) of the Credit
Agreement and Section 3.02(b) of the Intercreditor Agreement.

     The Company has requested an increase in the Revolving Credit Commitments
in an aggregate amount not to exceed $25,000,000.

     The Company has requested that certain covenants in the Credit Agreement be
modified and amended.

     The Company, the Administrative Agent, the Documentation Agent, the Issuing
Banks, the Subsidiary Guarantors and the Lenders have agreed, on the terms and
conditions herein set forth, that the Credit Agreement be amended.
<PAGE>
 
                                   AGREEMENT

     Section 1. Definitions.  Capitalized terms used but not otherwise
defined herein shall have the meaning assigned such terms in the Credit
Agreement.

     Section 2. Amendments to the Credit Agreement. On and after satisfaction of
the conditions set forth in Section 3 below, the Credit Agreement shall be
amended as follows:

     (a)  The following new definitions are hereby added to Section 1.01 of the
          Credit Agreement:

               "Additional Senior Subordinated Notes" shall mean the additional
          senior subordinated notes issued pursuant to the Additional Senior
          Subordinated Notes Indenture, as amended, in an amount of at least
          $150,000,000 issued by the Company.

               "Additional Senior Subordinated Notes Indenture" shall mean that
          certain Sterling Chemicals, Inc. $150,000,000 Senior Subordinated
          Notes Due 2007 Indenture with Fleet National Bank, as Trustee.

               "Second Amendment" shall mean the Second Amendment to Credit
          Agreement dated as of March 31, 1997, among the Company, the
          Administrative Agent, the Documentation Agent, the Issuing Banks and
          the Lenders.

               "Second Amendment Effective Date" shall mean March 31, 1997.

               "Senior Debt" shall mean, as to any Person, all Funded
          Indebtedness of such Person, less any subordinated Indebtedness with
          terms of subordination substantially similar to the terms of
          subordination of the Senior Subordinated Notes and the Additional
          Senior Subordinated Notes.

               "Senior Debt Leverage Ratio" shall mean, on any day, the ratio of
          (a) Senior Debt of the Company and its Subsidiaries on a consolidated
          basis as of the date of determination to (b) EBITDA for the Rolling
          Period ending on the most recent Quarterly Date as of the date of
          determination.

     (b) The following definitions set forth in Section 1.01 of the Credit
     Agreement are hereby amended in their entirety to read as follows:

               "Agreement" shall mean this Credit Agreement, as amended by the
          First Amendment to Credit Agreement and  the Second Amendment to
          Credit Agreement, and as further amended, modified or supplemented.

               "Cumulative Retained Cash Flow" shall mean an amount equal to the
          difference of (a) Retained Cash Flow for all then previous Fiscal
          Years, on a cumulative basis, minus (b) Designated Retained Cash Flow
          Usage, on a cumulative basis, in each case from the date that is the
          first day to occur after the next occurring principal payment required
          pursuant to Section 2.05(b) after giving effect to the application of
          the prepayment by the Company of the proceeds of the Additional Senior
          Subordinated Notes pursuant to Section 2.10(c).  For the period
          beginning on August 22, 1996 and ending on the date that is the first
          day to occur after the next occurring principal payment required
          pursuant to Section 2.05(b) after giving 

                                       2
<PAGE>
 
          effect to the application of the prepayment by the Company of the
          proceeds of the Additional Senior Subordinated Notes pursuant to
          Section 2.10(c), the Cumulative Retained Cash Flow shall equal zero.

     (c) Section 2.10(b) of the Credit Agreement is hereby amended by adding a
new clause (v) to read in its entirety as follows:

               (v) Prior to the date that is the first day to occur after the
         next occurring principal payment required pursuant to Section 2.05(b)
         after giving effect to the application of the prepayment by the Company
         of the proceeds of the Additional Senior Subordinated Notes pursuant to
         Section 2.10(c), the Company shall use its Retained Cash Flow to prepay
         or repay first the outstanding Revolving Credit Loans and second to
         prepay the Combined Term Loans, such prepayments to be applied as
         provided in Section 2.10(b)(iv).

     (d) Section 2.10(c) of the Credit Agreement is hereby amended by inserting
the following proviso in the fifth sentence of such Section immediately after
the words "respective installments of principal thereof" as they appear in
clause (i)(A)(y) of such sentence in such Section:

          "; provided, however, that with respect to the proceeds of the
          Additional Senior Subordinated Notes received by the Administrative
          Agent as a prepayment by the Company pursuant to this Section 2.10(c),
          50% of such proceeds shall be applied pro rata to scheduled
          amortization payments of the Tranche A Term Loans, the Tranche B Term
          Loans and the AFB Loans in the order of maturity thereof and the
          balance of such proceeds shall be applied pro rata to the respective
          remaining installments of principal thereof."

     (e) Section 5.03(a) of the Credit Agreement is hereby amended to read in
its entirety as follows:

          " (a)  Interest Coverage Ratio.  Maintain an Interest Coverage Ratio
     of not less than the ratio for each Rolling Period indicated below:

               Each Rolling Period ending                    Ratio

               December 31, 1996                              1.75
               March 31, 1997                                 1.75
               June 30, 1997                                  1.75
               September 30, 1997                             1.50
                                                                  
               Each Rolling Period during                         
               the Fiscal Year ending                        Ratio
                                                                  
               September 30, 1998                             1.35
                                                                  
               Each Rolling Period ending                    Ratio
                                                                  
               December 31, 1998                              1.50
               March 31, 1999                                 1.50
               June 30, 1999                                  2.25
               September 30, 1999                             2.25 

                                       3
<PAGE>
 
               Each Rolling Period                           Ratio
               thereafter                                     2.50"


     (f) Section 5.03(c) of the Credit Agreement is hereby amended to read in
its entirety as follows:

          "(c)  Fixed Charge Coverage Ratio.   Maintain a Fixed Charge Coverage
     Ratio of not less than the ratio for each Rolling Period indicated below:
 
               Each Rolling Period during
               the period beginning January 1, 1997          Ratio
               through September 30, 1997                     1.05
 
               The Rolling Period ending                     Ratio      
               December 31, 1997                              1.00      
                                                                        
               Each Rolling Period during                               
               the period beginning January 1,               Ratio      
               1998 through September 30, 1998                1.05      
                                                                        
               Each Rolling Period during                               
               the period beginning October 1, 1998          Ratio      
               through September 30, 1999                     1.10      
                                                                        
               Each Rolling Period during                    
               the Fiscal Years ending                       Ratio
               September 30, 2000                             1.15 
               September 30, 2001                             1.20 
                                                                        
               Each Rolling Period                           Ratio
               thereafter                                     1.20" 


     (g) Section 5.03(d) of the Credit Agreement is hereby amended to read in
its entirety as follows:

          "(d)  Leverage Ratio.  Maintain a Leverage Ratio of not greater than
     the ratio for each Rolling Period indicated below:

               Each Rolling Period ending                    Ratio

               December 31, 1996                              5.25 
               March 31, 1997                                 6.35
               June 30, 1997                                  7.00
               September 30, 1997                             7.00
               December 31, 1997                              7.00
               March 31, 1998                                 7.00
               June 30, 1998                                  7.00

                                       4
<PAGE>
 
               September 30, 1998                             7.00
               December 31, 1998                              6.50
               March 31, 1999                                 6.00
               June 30, 1999                                  4.50
               September 30, 1999                             4.50 
 
               Each Rolling Period during
               the Fiscal Years ending                       Ratio
 
               September 30, 2000                             4.00
               September 30, 2001                             3.50
               September 30, 2002                             3.00 

               Each Rolling Period                           Ratio
               thereafter                                     3.00"

     (h)  Section 5.03 of the Credit Agreement is hereby amended by adding a new
clause (e) to such Section to read in its entirety as follows:
 
          "(e) Senior Debt Leverage Ratio. Maintain a Senior Debt Leverage Ratio
     of not greater than the ratio for each Rolling Period indicated below:

 
               Each Rolling Period ending                    Ratio
 
               March 31, 1997                                 3.50
               June 30, 1997                                  3.50
               September 30, 1997                             3.50
               December 31, 1997                              3.50
               March 31, 1998                                 3.25
               June 30, 1998                                  3.25
               September 30, 1998                             3.25 
 
               Each Rolling Period during
               the Fiscal Years ending                       Ratio
 
               September 30, 1999                             3.00
               September 30, 2000                             3.00
               September 30, 2001                             3.00
               September 30, 2002                             3.00 

               Each Rolling Period                           Ratio
               thereafter                                     3.00"


     (i) Section 5.04(a) of the Credit Agreement is hereby amended:

          (i) by amending clause (i) of such Section to read in its entirety as
     follows:

                                       5
<PAGE>
 
               (i) the Lender Indebtedness in the principal amount not to exceed
          the outstanding Term Loans and the Revolving Credit Commitments less
          the aggregate amount of permanent reductions of the Revolving Credit
          Commitments and payments or prepayments of the Term Loans;

          (ii) by deleting the word "and" at the end of clause (x) of such
     Section, by changing the period at the end of clause (xi) to read "; and"
     and by adding the following new clause (xii) to read in its entirety as
     follows:

               (xii) Indebtedness evidenced by the Additional Senior
     Subordinated Notes.


     (j) Sections 5.04(p)(i), (ii) and (iii) of the Credit Agreement are hereby
amended in their entirety as follows:

          (i)   Amend, modify, or waive any covenant contained in the Senior
     Subordinated Notes, the Additional Senior Subordinated Notes, the Senior
     Subordinated Notes Indenture or the Additional Senior Subordinated Notes
     Indenture if the effect of such amendment, modification, or waiver would be
     to make the terms of the Senior Subordinated Notes, the Additional Senior
     Subordinated Notes, the Senior Subordinated Notes Indenture or the
     Additional Senior Subordinated Notes Indenture materially more onerous to
     the Company;

          (ii)  Amend, modify, or waive any provision of the Senior Subordinated
     Notes, the Additional Senior Subordinated Notes, the Senior Subordinated
     Notes Indenture or the Additional Senior Subordinated Notes Indenture which
     (A) subjects the Company to any additional material obligation, (B)
     increases the principal of or rate of interest on any Senior Subordinated
     Note or any Additional Senior Subordinated Note, (C) accelerates the date
     fixed for any payment of principal or interest on any Senior Subordinated
     Note or any Additional Senior Subordinated Note, (D) would change the
     percentage of holders of such Senior Subordinated Notes or such Additional
     Senior Subordinated Notes required for any such amendment, modification, or
     waiver from the percentage required on the Effective Date, or (E) relates
     to the subordination provisions thereof; or

          (iii) make any voluntary prepayment of, or optionally redeem, or make
     any payment in defeasance of, any part of the Senior Subordinated Notes or
     the Additional Senior Subordinated Notes.

     (k) Section 6.16 of the Credit Agreement is hereby amended to read in its
entirety as follows:

          Section 6.16  Senior Indebtedness. The Senior Subordinated Notes or
     the Additional Senior Subordinated Notes shall cease, for any reason, to be
     validly subordinated to the Lender Indebtedness, as provided in the Senior
     Subordinated Notes Indenture and the Additional Senior Subordinated
     Indenture or the Company, any Affiliate of the Company, the trustee in
     respect of the Senior Subordinated Notes or the Additional Senior
     Subordinated Notes or the holders of at least 25% in aggregate principal
     amount of the Senior Subordinated Notes or the Additional Senior
     Subordinated Notes shall so assert in writing;

                                       6
<PAGE>
 
     (l) Annex I to the Credit Agreement is hereby replaced in its entirety by
Annex I as attached to this Second Amendment to reflect an aggregate increase in
the Revolving Credit Commitments not to exceed $25,000,000.

       Section 3. Effectiveness of Amendments Contained in Section 2 of this
Second Amendment. If, but only if, the Administrative Agent has received as a
prepayment from the Company pursuant to the provisions of Section 2.10(c) of the
Credit Agreement the proceeds of the Additional Senior Subordinated Notes in an
aggregate principal amount equal to at least $150,000,000, then shall all the
amendments contained in Section 2 hereof become effective.  If the
Administrative Agent does not receive such prepayment from the Company then the
amendments contained in Section 2 of this Second Amendment shall be of no force
and effect whatsoever.

     Section 4.   Limitations.  The amendments set forth herein are limited
precisely as written and shall not be deemed to (a) be a consent to, or waiver
or modification of, any other term or condition of the Credit Agreement or any
of the other Financing Documents, or (b) except as expressly set forth herein,
prejudice any right or rights which the Lenders may now have or may have in the
future under or in connection with the Credit Agreement, the Financing Documents
or any of the other documents referred to therein.  Except as expressly modified
hereby or by express written amendments thereof, the terms and provisions of the
Credit Agreement, the Notes, and any other Financing Documents or any other
documents or instruments executed in connection with any of the foregoing are
and shall remain in full force and effect. In the event of a conflict between
this Second Amendment and any of the foregoing documents, the terms of this
Second Amendment shall be controlling.

       Section 5. Conditions Precedent and Effectiveness.  This Second
Amendment shall not be effective until: (a) this Second Amendment has been
executed and delivered by the Required Lenders; (b) a certified copy of the
resolutions of the Board of Directors of the Company dated as of the Second
Amendment Effective Date has been delivered to the Administrative Agent, such
resolutions approving, the $25,000,000 increase in the Revolving Credit
Commitment, the new Revolving Credit Notes evidencing the increase in the
Revolving Credit Commitment, the prepayment described in Section 3 of this
Second Amendment, the Additional Senior Subordinated Notes, this Second
Amendment, the First Amendment to AFB Acquisition Credit Agreement, and all
other documents, if any, to which the Company is a party and evidencing
corporate authorization with respect to such documents; (c) the delivery of the
new Revolving Credit Notes, as appropriate; (d) the delivery of an opinion of
counsel from Andrews & Kurth L.L.P., addressed to each of the Agents and the
Lenders and covering such other matters as any Administrative Agent or the
Lenders may reasonably request; and (e) the execution and delivery of this
Second Amendment by the Subsidiary Guarantors and the Company.

      Section 6.  Representations and Warranties.  Except as affected by the
transactions contemplated in the Credit Agreement and this Second Amendment,
each of the representations and warranties made by the Company and the
Subsidiary Guarantors in or pursuant to the Financing Documents, including the
Credit Agreement, shall be true and correct in all material respects as of the
Second Amendment Effective Date, as if made on and as of such date.

      Section 7.  No Default.  No Default or Event of Default shall have
occurred and be continuing as of the Second Amendment Effective Date.

      Section 8.  Adoption, Ratification and Confirmation of Credit Agreement.
Each of the Company, the Administrative Agent, the Documentation Agent, the
Issuing Banks and the Lenders signatories hereto does hereby adopt, ratify and
confirm the Credit Agreement, as amended hereby, and 

                                       7
<PAGE>
 
acknowledges and agrees that the Credit Agreement, as amended hereby, is and
remains in full force and effect.

      Section 9.  Ratification and Affirmation of Subsidiary Guaranty.  Each
of the Subsidiary Guarantors hereby expressly (i) acknowledges the terms of this
Second Amendment, (ii) acknowledges, renews and extends its continued liability
under the Guaranty Agreement dated as of January 31, 1997, in favor of the
Agents, the Issuing Banks, the Lenders, TCB as administrative agent under the
AFB Acquisition Credit Agreement, the Documentation Agent (as defined in the AFB
Acquisition Credit Agreement) and the AFB Lenders, as amended, supplemented or
otherwise modified, and agrees that such Guaranty Agreement remains in full
force and effect; and (iii)  agrees with the Administrative Agent, the
Documentation Agent, each Issuing Bank, each Lender, TCB as administrative agent
under the AFB Acquisition Credit Agreement, the Documentation Agent (as defined
in the AFB Acquisition Credit Agreement and each AFB Lender to promptly pay when
due all amounts owing or to be owing by it under such Guaranty Agreement
pursuant to the terms and conditions thereof.  Additionally, Sterling Fibers
hereby expressly (i) acknowledges the terms of this Second Amendment, (ii)
acknowledges, renews and extends its continued liability under the Limited
Guaranty Agreement (Santa Rosa) dated as of January 31, 1997, in favor of the
Agents, the Issuing Banks, the Lenders, TCB as administrative agent under the
AFB Acquisition Credit Agreement, the Documentation Agent (as defined in the AFB
Acquisition Credit Agreement) and the AFB Lenders, as amended, supplemented or
otherwise modified, and agrees that such Limited Guaranty Agreement remains in
full force and effect; and (iii)  agrees with the Administrative Agent, the
Documentation Agent, each Issuing Bank, each Lender, TCB as administrative agent
under the AFB Acquisition Credit Agreement, the Documentation Agent (as defined
in the AFB Acquisition Credit Agreement and each AFB Lender to promptly pay when
due all amounts owing or to be owing by it under such Limited Guaranty Agreement
pursuant to the terms and conditions thereof.

     Section 10.  Payment of Expenses.  The Company agrees, whether or not the
transactions hereby contemplated shall be consummated, to reimburse and save the
Administrative Agent and the Documentation Agent  harmless from and against
liability for the payment of all reasonable out-of-pocket costs and expenses
arising in connection with the preparation, execution, delivery, amendment,
modification, waiver and enforcement of, or the preservation of any rights under
this Second Amendment, including, without limitation, the reasonable fees and
expenses of any local or other counsel for the Administrative Agent, and all
stamp taxes (including interest and penalties, if any), recording taxes and
fees, filing taxes and fees, and other charges which may be payable in respect
of, or in respect of any modification of, the Credit Agreement and the other
Financing Documents.  The provisions of this Section shall survive the
termination of the Credit Agreement and the repayment of the Loans.

     Section 11.  Governing Law.  THIS SECOND AMENDMENT AND THE RIGHTS AND
OBLIGATIONS OF THE PARTIES HEREUNDER AND UNDER THE CREDIT AGREEMENT SHALL BE
CONSTRUED IN ACCORDANCE WITH AND BE GOVERNED BY THE LAWS OF THE STATE OF NEW
YORK (INCLUDING SECTION 5-1401 OF THE NEW YORK GENERAL OBLIGATIONS LAW, OR ANY
SIMILAR SUCCESSOR PROVISIONS THERETO, BUT EXCLUDING ALL OTHER CONFLICT-OF-LAWS
RULES) AND TO THE EXTENT CONTROLLING, LAWS OF THE UNITED STATES OF AMERICA.

     Section 12.  Descriptive Headings, etc.  The descriptive headings of the
several Sections of this Second Amendment are inserted for convenience only and
shall not be deemed to affect the meaning or construction of any of the
provisions hereof.

     Section 13.  Entire Agreement.  This Second Amendment and the documents
referred to herein represent the entire understanding of the parties hereto
regarding the subject matter hereof and supersede all 

                                       8
<PAGE>
 
prior and contemporaneous oral and written agreements of the parties hereto with
respect to the subject matter hereof, including, without limitation, any
commitment letters regarding the transactions contemplated by this Second
Amendment.

     Section 14.  Counterparts.  This Second Amendment may be executed in any
number of counterparts (including by telecopy) and by different parties on
separate counterparts and all of such counterparts shall together constitute one
and the same instrument.

     Section 15.  Amendment to Intercreditor Agreement.  The Administrative
Agent is hereby authorized and directed to execute and deliver on behalf of the
Lenders an amendment to the Intercreditor Agreement of even date herewith in the
form of Exhibit A to this Second Amendment.

                                       9
<PAGE>
 
     IN WITNESS WHEREOF, the parties hereto have caused this Second Amendment to
be duly executed and delivered by their respective duly authorized officers as
of the date first above written.


COMPANY:                      STERLING CHEMICALS, INC., formerly known as
                              STX CHEMICALS CORP.
 


                              By: __________________________________________
                                  Jim P. Wise
                                  Vice President and Chief Financial Officer



ADMINISTRATIVE AGENT          TEXAS COMMERCE BANK
DOCUMENTATION AGENT           NATIONAL ASSOCIATION
ISSUING BANKS                 Individually, as an Issuing Bank and as
Administrative                Agent
AND THE LENDERS:              



                              By: __________________________________________
                                  Name:
                                  Title:


                              CREDIT SUISSE FIRST BOSTON  (formerly known as
                              Credit Suisse) as Documentation Agent



                              By: __________________________________________
                                  Name:
                                  Title:


                              By: __________________________________________
                                  Name:
                                  Title:



                              [Signature Page-1]
<PAGE>
 
                              CREDIT SUISSE FIRST BOSTON (formerly known as
                              Credit Suisse) Individually, as an Issuing Bank
                              and as a Lender



                              By: __________________________________________
                                  Name:
                                  Title:


                              By: __________________________________________
                                  Name:
                                  Title:


                              ABN AMRO BANK N.V.
                              Houston Agency

                              By: ABN AMRO NORTH AMERICA, INC.
                                  as Agent


                                    By: ____________________________________
                                        Name:
                                        Title:

                                    By: ____________________________________
                                        Name:
                                        Title:


                              THE BANK OF NOVA SCOTIA


                              By: __________________________________________
                                  Name:
                                  Title:


                              BANK OF SCOTLAND


                              By: __________________________________________
                                  Name:
                                  Title:



                              [Signature Page-2]
<PAGE>
 
                              BANQUE PARIBAS


                              By: __________________________________________
                                  Name:
                                  Title:


                              By: __________________________________________
                                  Name:
                                  Title:


                              BHF-BANK AKTIENGESELLSCHAFT


                              By: __________________________________________
                                  Name:
                                  Title:


                              By: __________________________________________
                                  Name:
                                  Title:


                              CIBC INC.


                              By: __________________________________________
                                  Name:
                                  Title:


                              CREDIT LYONNAIS NEW YORK BRANCH


                              By: __________________________________________
                                  Name:
                                  Title:



                              [Signature Page-3]
<PAGE>
 
                              FIRST SOURCE FINANCIAL LLP

                              By: FIRST SOURCE FINANCIAL, INC.
                                  as its Agent/Manager


                                  By: ______________________________________
                                      Name:
                                      Title:


                              THE FIRST NATIONAL BANK OF CHICAGO


                              By: __________________________________________
                                  Name:
                                  Title:


                              THE CIT GROUP/BUSINESS CREDIT, INC.


                              By: __________________________________________
                                  Name:
                                  Title:


                              COMERICA BANK


                              By: __________________________________________
                                  Name:
                                  Title:


                              CREDITANSTALT CORPORATE FINANCE, INC.


                              By: __________________________________________
                                  Name:
                                  Title:


                              By: __________________________________________
                                  Name:
                                  Title:




                              [Signature Page-4]
<PAGE>
 
                              HIBERNIA NATIONAL BANK


                              By: __________________________________________
                                  Name:
                                  Title:


                              MERITA BANK LTD.
                              New York Branch


                              By: __________________________________________
                                  Name:
                                  Title:


                              By: __________________________________________
                                  Name:
                                  Title:


                              NATIONAL BANK OF CANADA


                              By: __________________________________________
                                  Name:
                                  Title:


                              By: __________________________________________
                                  Name:
                                  Title:


                              THE SANWA BANK, LIMITED, DALLAS AGENCY


                              By: __________________________________________
                                  Name:
                                  Title:


                              THE FUJI BANK, LIMITED


                              By: __________________________________________
                                  Name:
                                  Title:



                              [Signature Page-5]
<PAGE>
 
                              THE LONG-TERM CREDIT BANK OF JAPAN,
                               LIMITED, NEW YORK BRANCH


                              By: __________________________________________
                                  Name:
                                  Title:


                              OCTAGON CREDIT INVESTORS LOAN PORTFOLIO (a unit of
                              The Chase Manhattan Bank), (formerly known as CHL
                              HIGH YIELD LOAN PORTFOLIO (a unit of Chemical
                              Bank))


                              By: __________________________________________
                                  Name:
                                  Title:


                              MASSACHUSETTS MUTUAL LIFE INSURANCE COMPANY


                              By: __________________________________________
                                  Name:
                                  Title:


                              MERRILL LYNCH SENIOR FLOATING RATE FUND, INC.


                              By: __________________________________________
                                  Name:
                                  Title:


                              ML CBO IV (CAYMAN) LTD.

                                    By: PROTECTIVE ASSET MANAGEMENT L.L.C. 
                                        AS COLLATERAL MANAGER


                                    By: ____________________________________
                                        Name:
                                        Title:


                              [Signature Page-6]
<PAGE>
 
                              VAN KAMPEN AMERICAN CAPITAL PRIME RATE 
                              INCOME TRUST


                              By: __________________________________________
                                  Name:
                                  Title:


                              PARIBAS CAPITAL FUNDING LLC


                              By: __________________________________________
                                  Name:
                                  Title:


                              BANKERS TRUST COMPANY


                              By: __________________________________________
                                  Name:
                                  Title:


                              RESTRUCTURED OBLIGATIONS BACKED BY 
                              SENIOR ASSETS B.V.

                                    By its Managing Director
                                    ABN TRUSTCOMPANY (NEDERLAND) B.V.


                                    By: ____________________________________
                                        Name:
                                        Title:


                                    By: ____________________________________
                                        Name:
                                        Title:


                              AERIES FINANCE LTD.


                              By: __________________________________________
                                  Name:
                                  Title:



                              [Signature Page-7]
<PAGE>
 
                              CAPTIVA FINANCE LTD.


                              By: __________________________________________
                                  Name:
                                  Title:


                              CERES FINANCE LTD.


                              By: __________________________________________
                                  Name:
                                  Title:


                              MERRILL LYNCH PRIME RATE PORTFOLIO

                                    By:  Merrill Lynch Asset Management, L.P.
                                         as Investment Advisor


                                    By: ____________________________________
                                        Name:
                                        Title:


                              SENIOR DEBT PORTFOLIO

                                    By:  Boston Management and Research,
                                         as Investment Advisor


                                    By: ____________________________________
                                        Name:
                                        Title:



                              [Signature Page-8]
<PAGE>
 
SUBSIDIARY GUARANTORS:        STERLING CHEMICALS INTERNATIONAL, INC.
                              STERLING CHEMICALS ENERGY, INC.


                              By: __________________________________________
                                  Jim P. Wise
                                  Vice President



                              STERLING CANADA, INC.
                              STERLING PULP CHEMICALS US, INC.
                              STERLING PULP CHEMICALS, INC.
                              STERLING FIBERS, INC.


                              By: __________________________________________
                                  Jim P. Wise
                                  Vice President - Finance



                              [Signature Page-9]
<PAGE>
 
                                    ANNEX I

                                  COMMITMENTS


                                                         REVOLVING
                                                          CREDIT
LENDERS                                                 COMMITMENTS
- -------                                                 -----------


Texas Commerce Bank National Association             $  9,759,380.11
                                                        
Credit Suisse First Boston                           $  9,759,380.12
                                                        
Credit Lyonnais New York Branch                      $  5,872,756.93
                                                        
ABN AMRO Bank N.V.                                   $  8,351,549.75
                                                        
The Bank of Nova Scotia                              $  6,872,756.93
                                                        
Bank of Scotland                                     $  9,372,756.93
                                                        
Banque Paribas                                       $  6,872,756.93
                                                        
BHF-Bank Aktiengesellschaft                          $  6,893,964.11
                                                        
CIBC, Inc.                                           $  2,610,114.19
                                                        
The First National Bank of Chicago                   $  7,372,756.93
                                                        
First Source Financial LLP                           $  7,372,756.93
                                                        
The CIT Group/Business Credit, Inc.                  $  6,893,964.11
                                                        
Hibernia National Bank                               $  8,893,964.11
                                                        
Comerica Bank                                        $  3,262,642.74
                                                        
Creditanstalt Corporate Finance, Inc.                $  4,262,642.74
                                                        
The Fuji Bank, Limited                               $  3,262,642.74

The Long Term Credit Bank of Japan, Limited,            
 New York Branch                                     $  3,262,642.74
                                                        
Merita Bank, Limited                                 $  4,893,964.11
                                                        
National Bank of Canada                              $  5,893,964.11
                                                        
The Sanwa Bank, Limited, Dallas Agency               $  3,262,642.74

TOTAL                                                $125,000,000.00
 
<PAGE>
 
                                   EXHIBIT A
                                       TO
                      SECOND AMENDMENT TO CREDIT AGREEMENT

                                   [FORM OF]
                  [FIRST AMENDMENT TO INTERCREDITOR AGREEMENT]


     THIS FIRST AMENDMENT TO INTERCREDITOR AGREEMENT ("First Amendment") dated
as of March 31, 1997 (the "First Amendment Effective Date") is made and entered
into by and among (i) the banks and other financial institutions (the "Original
Lenders") which are or may from time to time become parties to the Original
Credit Agreement (as hereinafter defined) , TEXAS COMMERCE BANK NATIONAL
ASSOCIATION, as their Administrative Agent (the "Original Administrative
Agent"); (ii) the banks and other financial institutions (the "AFB Lenders")
which are or may  from time to time become parties to the AFB Acquisition Credit
Agreement (as hereinafter defined), by TEXAS COMMERCE BANK NATIONAL ASSOCIATION,
as their administrative agent (the "AFB Administrative Agent") to the AFB
Acquisition Credit Agreement (as hereinafter defined) and STERLING CHEMICALS,
INC., a Delaware corporation (the "Company").


                             INTRODUCTORY STATEMENT
                             ----------------------

     The Company has entered into a credit agreement dated as of June 21, 1996,
among the Company, Texas Commerce Bank National Association, individually, as an
Issuing Bank and as Administrative Agent, Credit Suisse First Boston (formerly
known as Credit Suisse), individually, as an Issuing Bank and as Documentation
Agent, and the financial institutions parties thereto, as amended by the First
Amendment to Credit Agreement dated as of January 31, 1997 (as amended from time
to time, the "Original Credit Agreement").

     The parties to the Original Credit Agreement and the parties to that
certain Credit Agreement dated as of January 31, 1997, by and among the Company,
Texas Commerce Bank National Association, individually, and as Administrative
Agent, Credit Suisse First Boston, individually, and as Documentation Agent, and
the financial institutions parties thereto (as amended, the "AFB Acquisition
Credit Agreement") have entered into an Intercreditor Agreement dated as of
January 31, 1997 (the "Intercreditor Agreement") pursuant to which the parties
thereto agreed to share the proceeds of prepayments of term loans made by the
Company in accordance with the terms thereof.

     The Company intends to issue at least $150,000,000 of additional senior
subordinated notes and will use the proceeds of such senior subordinated notes
to voluntarily prepay the Combined Term Loans (as defined in the Intercreditor
Agreement) pursuant to Section 2.10(c) of the Original Credit Agreement, Section
2.10(b) of the AFB Acquisition Credit Agreement and Section 3.02(b) of the
Intercreditor Agreement.
<PAGE>
 
     The Company has requested that certain covenants in the AFB Acquisition
Credit Agreement be modified and amended and the Original Administrative Agent
and the Administrative Agents, acting on behalf of the Combined Lenders (as
defined in the Intercreditor Agreement) have determined that corresponding
changes and modifications need to be made in the Intercreditor Agreement..

     The Company, the AFB Administrative Agent, the Original Administrative
Agent and the Combined Lenders have agreed, on the terms and conditions herein
set forth, that the Intercreditor Agreement be amended.

                                   AGREEMENT

     Section 1.     Definitions.  Capitalized terms used but not otherwise
defined herein shall have the meaning assigned such terms in the Intercreditor
Agreement.

     Section 2.     Amendments to the Intercreditor Agreement.  On and after
satisfaction of the conditions set forth in Section 3 below, the Intercreditor
Agreement shall be amended as follows:

     (a)  The following new definitions are hereby added to Section 1.01 of the
          Intercreditor Agreement:

               "First Amendment to AFB Acquisition Credit Agreement" shall mean
          the First Amendment to Credit Agreement dated as of March 31, 1997,
          among the AFB Administrative Agent, the Documentation Agent under the
          AFB Acquisition Credit Agreement,  the AFB Lenders signatories thereto
          and the Company.

               "First Amendment to Intercreditor Agreement" shall mean the First
          Amendment to Intercreditor Agreement dated as of March 31, 1997, among
          the AFB Administrative Agent, the Original Administrative Agent, the
          Combined Lenders, and the Company.

               "First Amendment Effective Date" shall mean March 31, 1997.

               "Second Amendment to Original Credit Agreement" shall mean the
          Second Amendment to Credit Agreement dated as of March 31, 1997, among
          the Original Administrative Agent, the Original Lenders signatories
          thereto, the Documentation Agent under the Original Credit Agreement
          and the Company.

     (b) The following definitions set forth in Section 1.01 of the
     Intercreditor Agreement are hereby amended in their entirety to read as
     follows:

               "AFB Acquisition Credit Agreement" shall mean the credit
          agreement dated as of even date herewith by and among the Company, the
          AFB Lenders, the AFB Administrative Agent, and Credit Suisse First
          Boston, as documentation agent, as 

                                       2
<PAGE>
 
          amended by the First Amendment to AFB Acquisition Credit Agreement and
          as amended, supplemented or modified from time to time .

               "Intercreditor Agreement" shall mean this Intercreditor
          Agreement, as amended by the First Amendment to Intercreditor
          Agreement and as further amended, modified or supplemented.

               "Original Credit Agreement" shall mean the credit agreement dated
          as of June 21, 1996, by and among the Company, the Lenders, the
          Original Administrative Agent and Credit Suisse First Boston (formerly
          known as Credit Suisse), as documentation agent, as amended by the
          First Amendment to Original Credit Agreement, the Second Amendment to
          Original Credit Agreement, and as further amended, supplemented or
          modified from time to time.

     (c) Section 3.02(b) of the Intercreditor Agreement is hereby amended by
inserting the following proviso in the fifth sentence of such Section
immediately after the words "respective installments of principal thereof" as
they appear in clause (i)(A)(y) of such sentence in such Section:

     "; provided, however, that with respect to the proceeds of the Additional
     Senior Subordinated Notes received by the Administrative Agents as a
     prepayment by the Company pursuant to Section 2.10(b) of the AFB
     Acquisition Credit Agreement, Section 2.10(c) of the Original Credit
     Agreement and this Section 3.02.(b), 50% of such proceeds shall be applied
     pro rata to scheduled amortization payments of the Original Tranche A Term
     Loans, the Original Tranche B Term Loans and the AFB Loans in the order of
     maturity thereof and the balance of such proceeds shall be applied pro rata
     to the respective remaining installments of principal thereof."

       Section 3.   Effectiveness of Amendments Contained in Section 2 of this
First Amendment.  If, but only if, the Administrative Agents has received as a
prepayment from the Company pursuant to the provisions of  Section 2.10(b) of
the AFB Acquisition Credit Agreement, Section 2.10(c) of the Original Credit
Agreement and Section 3.02(b) of the Intercreditor Agreement the proceeds of the
Additional Senior Subordinated Notes in an aggregate principal amount equal to
at least $150,000,000, then shall all the amendments contained in Section 2
hereof become effective.  If the Administrative Agents do not receive such
prepayment from the Company then the amendments contained in Section 2 of this
First Amendment shall be of no force and effect whatsoever.

     Section 4.     Limitations.  The amendments set forth herein are limited
precisely as written and shall not be deemed to (a) be a consent to, or waiver
or modification of, any other term or condition of the Intercreditor Agreement
or any of the other Financing Documents, or (b) except as expressly set forth
herein, prejudice any right or rights which the Combined Lenders may now have or
may have in the future under or in connection with the Intercreditor Agreement,
the Financing Documents or any of the other documents referred to therein.
Except as expressly modified hereby or by express written amendments thereof,
the terms and provisions of the Intercreditor Agreement or any other documents
or instruments executed in connection therewith are and shall remain in full

                                       3
<PAGE>
 
force and effect.  In the event of a conflict between this First Amendment and
any of the foregoing documents, the terms of this First Amendment shall be
controlling.

       Section 5.   Conditions Precedent and Effectiveness.  This First
Amendment shall not be effective until: (a) the First Amendment to AFB
Acquisition Credit Agreement has been executed and delivered by the Required
Lenders thereof; (b) the Second Amendment to Original Credit Agreement has been
executed and delivered by the Required Lenders thereof; (c) this First Amendment
has been executed and delivered by Texas Commerce Bank National Association,
acting in its capacity as the Original Administrative Agent (and in such
capacity as Administrative Agent for the Combined Lenders) and on behalf of the
Original Lenders and as the AFB Administrative Agent and on behalf of the AFB
Lenders; and (d) this First Amendment has been joined and delivered by the
Company.

      Section 6.    No Default.  No Default or Event of Default under either of
the Original Credit Agreement or the AFB Acquisition Credit Agreement shall have
occurred and be continuing as of the First Amendment Effective Date.

      Section 7.    Adoption, Ratification and Confirmation of Intercreditor
Agreement.  Each of the Company, the Administrative Agents, the Documentation
Agents, and the Combined Lenders does hereby adopt, ratify and confirm the
Intercreditor Agreement, as amended hereby, and acknowledges and agrees that the
Intercreditor Agreement, as amended hereby, is and remains in full force and
effect.

     Section 8.     Payment of Expenses.  The Company agrees, whether or not the
transactions hereby contemplated shall be consummated, to reimburse and save the
Administrative Agents and the Documentation Agents  harmless from and against
liability for the payment of all reasonable out-of-pocket costs and expenses
arising in connection with the preparation, execution, delivery, amendment,
modification, waiver and enforcement of, or the preservation of any rights under
this First Amendment, including, without limitation, the reasonable fees and
expenses of any local or other counsel for the Administrative Agents, and all
stamp taxes (including interest and penalties, if any), recording taxes and
fees, filing taxes and fees, and other charges which may be payable in respect
of, or in respect of any modification of, the Intercreditor Agreement and the
other Financing Documents.  The provisions of this Section shall survive the
termination of the Intercreditor Agreement and the repayment of the Combined
Loans.

     Section 9.     Governing Law.  THIS FIRST AMENDMENT AND THE RIGHTS AND
OBLIGATIONS OF THE PARTIES HEREUNDER AND UNDER THE INTERCREDITOR AGREEMENT SHALL
BE CONSTRUED IN ACCORDANCE WITH AND BE GOVERNED BY THE LAWS OF THE STATE OF NEW
YORK (INCLUDING SECTION 5-1401 OF THE NEW YORK GENERAL OBLIGATIONS LAW, OR ANY
SIMILAR SUCCESSOR PROVISIONS THERETO, BUT EXCLUDING ALL OTHER CONFLICT-OF-LAWS
RULES) AND TO THE EXTENT CONTROLLING, LAWS OF THE UNITED STATES OF AMERICA.

     Section 10.    Descriptive Headings, etc.  The descriptive headings of the
several Sections of this First Amendment are inserted for convenience only and
shall not be deemed to affect the meaning or construction of any of the
provisions hereof.

                                       4
<PAGE>
 
     Section 11.    Entire Agreement.  This First Amendment and the documents
referred to herein represent the entire understanding of the parties hereto
regarding the subject matter hereof and supersede all prior and contemporaneous
oral and written agreements of the parties hereto with respect to the subject
matter hereof, including, without limitation, any commitment letters regarding
the transactions contemplated by this First Amendment.

     Section 12.    Counterparts.  This First Amendment may be executed in any
number of counterparts (including by telecopy) and by different parties on
separate counterparts and all of such counterparts shall together constitute one
and the same instrument.

                                       5
<PAGE>
 
     IN WITNESS WHEREOF, the parties hereto have caused this First Amendment to
be duly executed and delivered by their respective duly authorized officers as
of the date first above written.

                                    TEXAS COMMERCE BANK NATIONAL
                                    ASSOCIATION, as Administrative
                                    Agent under the Original Credit
                                    Agreement (and in such capacity, as
                                    Administrative Agent For Combined Lenders) 
                                    and on behalf of the Original Lenders and 
                                    as Administrative Agent under the AFB
                                    Acquisition Credit Agreement and on behalf 
                                    of the AFB Lenders



                                    By:_________________________________
                                          Name:
                                          Title:

JOINDER:

STERLING CHEMICALS, INC.
(as Company under the Original
Credit Agreement and under the
AFB Acquisition Credit Agreement)



By:______________________________
      Name:  Jim P. Wise
      Title:  Vice President and Chief Financial Officer


                             [Signature Page - 1]

<PAGE>
 


                                                                     EXHIBIT 4.5

                      FIRST AMENDMENT TO CREDIT AGREEMENT


     THIS FIRST AMENDMENT TO CREDIT AGREEMENT ("First Amendment") dated as of
March 31, 1997 (the "First Amendment Effective Date") is made and entered into
by and among STERLING CHEMICALS, INC., a Delaware corporation (the "Company"),
TEXAS COMMERCE BANK NATIONAL ASSOCIATION, individually, and as Administrative
Agent and CREDIT SUISSE FIRST BOSTON, individually, and as Documentation Agent
and the other financial institutions signatories hereto.


                             INTRODUCTORY STATEMENT
                             ----------------------

     The Company has entered into a credit agreement dated as of June 21, 1996,
among the Company, Texas Commerce Bank National Association, individually, as an
Issuing Bank and as Administrative Agent, Credit Suisse First Boston (formerly
known as Credit Suisse), individually, as an Issuing Bank and as Documentation
Agent, and the financial institutions parties thereto, as amended by the First
Amendment to Credit Agreement (the "First Amendment") dated as of 
January 31, 1997 (as amended by the First Amendment and otherwise, the "Original
Credit Agreement").

     The parties to the Original Credit Agreement and the parties to that
certain Credit Agreement dated as of January 31, 1997, by and among the Company,
Texas Commerce Bank National Association, individually, and as Administrative
Agent, Credit Suisse First Boston, individually, and as Documentation Agent, and
the financial institutions parties thereto (the "Credit Agreement") have entered
into an Intercreditor Agreement dated as of January 31, 1997 (the "Intercreditor
Agreement") pursuant to which the parties thereto agreed to share the proceeds
of prepayments of term loans made by the Company in accordance with the terms
thereof.

     The Company intends to issue at least $150,000,000 of additional senior
subordinated notes and will use the proceeds of such senior subordinated notes
to voluntarily prepay Loans pursuant to Section 2.10(b) of the Credit Agreement
and Section 3.02(b) of the Intercreditor Agreement.

     The Company has requested an increase in the Revolving Credit Commitments
under the Original Credit Agreement in an aggregate amount not to exceed
$25,000,000.

     The Company has requested that certain covenants in the Credit Agreement be
modified and amended.

     The Company, the Administrative Agent, the Documentation Agent, the
Subsidiary Guarantors and the Lenders have agreed, on the terms and conditions
herein set forth, that the Credit Agreement be amended.
<PAGE>
 
                                   AGREEMENT

     Section 1. Definitions.  Capitalized terms used but not otherwise
defined herein shall have the meaning assigned such terms in the Credit
Agreement.

     Section 2. Amendments to the Credit Agreement.  On and after
satisfaction of the conditions set forth in Section 3 below, the Credit
Agreement shall be amended as follows:

     (a)  The following new definitions are hereby added to Section 1.01 of the
          Credit Agreement:

                "Additional Senior Subordinated Notes" shall mean the additional
          senior subordinated notes issued pursuant to the Additional Senior
          Subordinated Notes Indenture, as amended, in an amount of at least
          $150,000,000 issued by the Company.

                "Additional Senior Subordinated Notes Indenture" shall mean that
          certain Sterling Chemicals, Inc. $150,000,000 Senior Subordinated
          Notes Due 2007 Indenture with Fleet National Bank, as Trustee.

                "First Amendment" shall mean the First Amendment to Credit
          Agreement dated as of March 31, 1997, among the Company, the
          Administrative Agent, the Documentation Agent and the Lenders.

                "First Amendment Effective Date" shall mean March 31, 1997.

                "Senior Debt" shall mean, as to any Person, all Funded
          Indebtedness of such Person, less any subordinated Indebtedness with
          terms of subordination substantially similar to the terms of
          subordination of the Senior Subordinated Notes and the Additional
          Senior Subordinated Notes.

                "Senior Debt Leverage Ratio" shall mean, on any day, the ratio
          of (a) Senior Debt of the Company and its Subsidiaries on a
          consolidated basis as of the date of determination to (b) EBITDA for
          the Rolling Period ending on the most recent Quarterly Date as of the
          date of determination.

     (b) The following definitions set forth in Section 1.01 of the Credit
     Agreement are hereby amended in their entirety to read as follows:

                "Agreement" shall mean this Credit Agreement, as amended by the
          First Amendment to Credit Agreement and as further amended, modified
          or supplemented.

                "Cumulative Retained Cash Flow" shall mean an amount equal to
          the difference of (a) Retained Cash Flow for all then previous Fiscal
          Years, on a cumulative basis, minus (b) Designated Retained Cash Flow
          Usage, on a cumulative 

                                       2
<PAGE>
 
          basis, in each case from the date that is the first day to occur after
          the next occurring principal payment required pursuant to Section
          2.05(a) after giving effect to the application of the prepayment by
          the Company of the proceeds of the Additional Senior Subordinated
          Notes pursuant to Section 2.10(b). For the period beginning on August
          22, 1996 and ending on the date that is the first day to occur after
          the next occurring principal payment required pursuant to Section
          2.05(a) after giving effect to the application of the prepayment by
          the Company of the proceeds of the Additional Senior Subordinated
          Notes pursuant to Section 2.10(b), the Cumulative Retained Cash Flow
          shall equal zero.

     (c) Section 2.10(a) of the Credit Agreement is hereby amended by adding a
new clause (v) to read in its entirety as follows:

               (v) Prior to the date that is the first day to occur after the
         next occurring principal payment required pursuant to Section 2.05(a)
         after giving effect to the application of the prepayment by the Company
         of the proceeds of the Additional Senior Subordinated Notes pursuant to
         Section 2.10(b), the Company shall use its Retained Cash Flow to prepay
         or repay first the outstanding Revolving Credit Loans and second to
         prepay the Combined Term Loans, such prepayments to be applied as
         provided in Section 2.10(a)(iv).

     (d) Section 2.10(b) of the Credit Agreement is hereby amended by inserting
the following proviso in the fifth sentence of such Section immediately after
the words "respective installments of principal thereof" as they appear in
clause (i)(A)(y) of such sentence in such Section:

          "; provided, however, that with respect to the proceeds of the
          Additional Senior Subordinated Notes received by the Administrative
          Agent as a prepayment by the Company pursuant to this Section 2.10(b),
          50% of such proceeds shall be applied pro rata to scheduled
          amortization payments of the Original Tranche A Term Loans, the
          Original Tranche B Term Loans and the Loans in the order of maturity
          thereof and the balance of such proceeds shall be applied pro rata to
          the respective remaining installments of principal thereof."

     (e) Section 5.03(a) of the Credit Agreement is hereby amended to read in
its entirety as follows:

          "(a) Interest Coverage Ratio.  Maintain an Interest Coverage Ratio
     of not less than the ratio for each Rolling Period indicated below:

               Each Rolling Period ending                    Ratio

               December 31, 1996                              1.75
               March 31, 1997                                 1.75
               June 30, 1997                                  1.75
               September 30, 1997                             1.50 
 

                                       3
<PAGE>
 
               Each Rolling Period during
               the Fiscal Year ending                        Ratio
 
               September 30, 1998                             1.35
                                                                  
               Each Rolling Period ending                    Ratio
                                                                  
               December 31, 1998                              1.50
               March 31, 1999                                 1.50
               June 30, 1999                                  2.25
               September 30, 1999                             2.25 

               Each Rolling Period                           Ratio
               thereafter                                     2.50"

     (f) Section 5.03(c) of the Credit Agreement is hereby amended to read in
its entirety as follows:
 
          "(c) Fixed Charge Coverage Ratio. Maintain a Fixed Charge Coverage
     Ratio of not less than the ratio for each Rolling Period indicated below:
 
 
               Each Rolling Period during
               the period beginning January 1,               Ratio
               1997 through September 30, 1997                1.05
 
               The Rolling Period ending                     Ratio
               December 31, 1997                              1.00
 
               Each Rolling Period during
               the period beginning January 1,               Ratio
               1998 through September 30, 1998                1.05
 
               Each Rolling Period during
               the period beginning October 1,               Ratio
               1998 through September 30, 1999                1.10
 
               Each Rolling Period during
               the Fiscal Years ending                       Ratio
                          
               September 30, 2000                             1.15
               September 30, 2001                             1.20

               Each Rolling Period                           Ratio
               thereafter                                    1.20"

                                       4
<PAGE>
 
     (g) Section 5.03(d) of the Credit Agreement is hereby amended to read in
its entirety as follows:

          "(d)  Leverage Ratio.  Maintain a Leverage Ratio of not greater than
     the ratio for each Rolling Period indicated below:

               Each Rolling Period ending                    Ratio

               December 31, 1996                              5.25
               March 31, 1997                                 6.35
               June 30, 1997                                  7.00
               September 30, 1997                             7.00
               December 31, 1997                              7.00
               March 31, 1998                                 7.00
               June 30, 1998                                  7.00
               September 30, 1998                             7.00
               December 31, 1998                              6.50
               March 31, 1999                                 6.00
               June 30, 1999                                  4.50
               September 30, 1999                             4.50 
 
               Each Rolling Period during
               the Fiscal Years ending                       Ratio
 
               September 30, 2000                             4.00
               September 30, 2001                             3.50
               September 30, 2002                             3.00 

               Each Rolling Period                           Ratio
               thereafter                                     3.00"

     (h)  Section 5.03 of the Credit Agreement is hereby amended by adding a new
clause (e) to such Section to read in its entirety as follows:
 
          "(e) greater than the ratio for each Rolling Period indicated
     below:        
 
 
               Each Rolling Period ending                    Ratio
 
               March 31, 1997                                 3.50
               June 30, 1997                                  3.50
               September 30, 1997                             3.50
               December 31, 1997                              3.50
               March 31, 1998                                 3.25
               June 30, 1998                                  3.25
               September 30, 1998                             3.25 

                                       5
<PAGE>
 
               Each Rolling Period during
               the Fiscal Years ending                       Ratio
 
               September 30, 1999                             3.00
               September 30, 2000                             3.00
               September 30, 2001                             3.00
               September 30, 2002                             3.00 

               Each Rolling Period                           Ratio
               thereafter                                     3.00"


     (i)  Section 5.04(a) of the Credit Agreement is hereby amended:

          (i) by amending clause (xi) of such Section to read in its entirety as
     follows:

               (i) Indebtedness under the Original Credit Agreement in the
          principal amount not to exceed the sum of the outstanding Original
          Term Loans and the Revolving Credit Commitments (as defined in the
          Original Credit Agreement) less the aggregate amount of permanent
          reductions of the Revolving Credit Commitments and payments or
          prepayments of the Original Term Loans;

          (ii) by deleting the word "and" at the end of clause (x) of such
     Section, by changing the period at the end of clause (xi) to read "; and"
     and by adding the following new clause (xii) to read in its entirety as
     follows:

               (xii) Indebtedness evidenced by the Additional Senior
          Subordinated Notes.

     (j) Sections 5.04(p)(i), (ii) and (iii) of the Credit Agreement are hereby
amended in their entirety as follows:

          (i)  Amend, modify, or waive any covenant contained in the Senior
     Subordinated Notes, the Additional Senior Subordinated Notes, the Senior
     Subordinated Notes Indenture or the Additional Senior Subordinated Notes
     Indenture if the effect of such amendment, modification, or waiver would be
     to make the terms of the Senior Subordinated Notes, the Additional Senior
     Subordinated Notes, the Senior Subordinated Notes Indenture or the
     Additional Senior Subordinated Notes Indenture materially more onerous to
     the Company;

          (ii) Amend, modify, or waive any provision of the Senior Subordinated
     Notes, the Additional Senior Subordinated Notes, the Senior Subordinated
     Notes Indenture or the Additional Senior Subordinated Notes Indenture which
     (A) subjects the Company to any additional material obligation, (B)
     increases the principal of or rate of interest on any Senior Subordinated
     Note or any Additional Senior Subordinated Note, (C) accelerates the date

                                       6
<PAGE>
 
     fixed for any payment of principal or interest on any Senior Subordinated
     Note or any Additional Senior Subordinated Note, (D) would change the
     percentage of holders of such Senior Subordinated Notes or such Additional
     Senior Subordinated Notes required for any such amendment, modification, or
     waiver from the percentage required on the Effective Date, or (E) relates
     to the subordination provisions thereof; or

          (iii)  make any voluntary prepayment of, or optionally redeem, or make
     any payment in defeasance of, any part of the Senior Subordinated Notes or
     the Additional Senior Subordinated Notes.

     (k) Section 6.16 of the Credit Agreement is hereby amended to read in its
entirety as follows:

          Section 6.16  Senior Indebtedness. The Senior Subordinated Notes or
     the Additional Senior Subordinated Notes shall cease, for any reason, to be
     validly subordinated to the Lender Indebtedness, as provided in the Senior
     Subordinated Notes Indenture and Additional Senior Subordinated Notes
     Indenture or the Company, any Affiliate of the Company, the trustee in
     respect of the Senior Subordinated Notes or the Additional Senior
     Subordinated Notes or the holders of at least 25% in aggregate principal
     amount of the Senior Subordinated Notes or the Additional Senior
     Subordinated Notes shall so assert in writing;

       Section 3. Effectiveness of Amendments Contained in Section 2 of this
First Amendment.  If, but only if, the Administrative Agent has received as a
prepayment from the Company pursuant to the provisions of Section 2.10(b) of the
Credit Agreement the proceeds of the Additional Senior Subordinated Notes in an
aggregate principal amount equal to at least $150,000,000, then shall all the
amendments contained in Section 2 hereof become effective.  If the
Administrative Agent does not receive such prepayment from the Company then the
amendments contained in Section 2 of this First Amendment shall be of no force
and effect whatsoever.

     Section 4.   Limitations.  The amendments set forth herein are limited
precisely as written and shall not be deemed to (a) be a consent to, or waiver
or modification of, any other term or condition of the Credit Agreement or any
of the other Financing Documents, or (b) except as expressly set forth herein,
prejudice any right or rights which the Lenders may now have or may have in the
future under or in connection with the Credit Agreement, the Financing Documents
or any of the other documents referred to therein.  Except as expressly modified
hereby or by express written amendments thereof, the terms and provisions of the
Credit Agreement, the Notes, and any other Financing Documents or any other
documents or instruments executed in connection with any of the foregoing are
and shall remain in full force and effect.  In the event of a conflict between
this First Amendment and any of the foregoing documents, the terms of this First
Amendment shall be controlling.

       Section 5. Conditions Precedent and Effectiveness.  This First
Amendment shall not be effective until: (a) this First Amendment has been
executed and delivered by the Required Lenders; (b) a certified copy of the
resolutions of the Board of Directors of the Company dated as of the First
Amendment Effective Date has been delivered to the Administrative Agent, such
resolutions 

                                       7
<PAGE>
 
approving, the prepayment described in Section 3 of this First Amendment, the
Additional Senior Subordinated Notes, this First Amendment, the Second Amendment
to Original Credit Agreement, and all other documents, if any, to which the
Company is a party and evidencing corporate authorization with respect to such
documents; (c) the delivery of an opinion of counsel from Andrews & Kurth
L.L.P., addressed to each of the Agents and the Lenders and covering such other
matters as any Administrative Agent or the Lenders may reasonably request; and
(d) the execution and delivery of this First Amendment by the Subsidiary
Guarantors and the Company.

      Section 6.  Representations and Warranties.  Except as affected by the
transactions contemplated in the Credit Agreement and this First Amendment, each
of the representations and warranties made by the Company and the Subsidiary
Guarantors in or pursuant to the Financing Documents, including the Credit
Agreement, shall be true and correct in all material respects as of the First
Amendment Effective Date, as if made on and as of such date.

      Section 7.  No Default.  No Default or Event of Default shall have
occurred and be continuing as of the First Amendment Effective Date.

     Section 8.   Approval of Revolving Credit Commitment Increase under
Original Credit Agreement.  Each of the Company, the Administrative Agent, the
Documentation Agent and the Lenders signatories hereto hereby approve and
consent to the increase in the Original Lenders' Revolving Credit Commitment by
an aggregate amount not to exceed $25,000,000.

      Section 9.  Adoption, Ratification and Confirmation of Credit Agreement.
Each of the Company, the Administrative Agent, the Documentation Agent, and the
Lenders signatories hereto does hereby adopt, ratify and confirm the Credit
Agreement, as amended hereby, and acknowledges and agrees that the Credit
Agreement, as amended hereby, is and remains in full force and effect.

      Section 10. Ratification and Affirmation of Subsidiary Guaranty.  Each
of the Subsidiary Guarantors hereby expressly (i) acknowledges the terms of this
First Amendment, (ii) acknowledges, renews and extends its continued liability
under the Guaranty Agreement dated as of January 31, 1997, in favor of the
Agents, the Issuing Banks (as defined in the Original Credit Agreement), the
Lenders, TCB as administrative agent under the Original Credit Agreement, the
Documentation Agent (as defined in the Original Credit Agreement) and the
Original Lenders, as amended, supplemented or otherwise modified, and agrees
that such Guaranty Agreement remains in full force and effect; and (iii)  agrees
with the Administrative Agent, the Documentation Agent, each Lender, the Issuing
Banks (as defined in the Original Credit Agreement) TCB as administrative agent
under the Original Credit Agreement, the Documentation Agent (as defined in the
Original Credit Agreement and each Original Lender to promptly pay when due all
amounts owing or to be owing by it under such Guaranty Agreement pursuant to the
terms and conditions thereof.  Additionally, Sterling Fibers hereby expressly
(i) acknowledges the terms of this First Amendment, (ii) acknowledges, renews
and extends its continued liability under the Limited Guaranty Agreement (Santa
Rosa) dated as of January 31, 1997, in favor of the Agents, the Issuing Banks
(as defined in the Original Credit Agreement), the Lenders, TCB as
administrative agent under the Original Credit Agreement, the Documentation
Agent (as defined in the Original Credit Agreement) and the Original Lenders, as
amended, supplemented or otherwise modified, and agrees that such Limited
Guaranty 

                                       8
<PAGE>
 
Agreement remains in full force and effect; and (iii) agrees with the
Administrative Agent, the Documentation Agent, each Issuing Bank, each Lender,
TCB as administrative agent under the Original Credit Agreement, the
Documentation Agent (as defined in the Original Credit Agreement and each
Original Lender to promptly pay when due all amounts owing or to be owing by it
under such Limited Guaranty Agreement pursuant to the terms and conditions
thereof.

     Section 11.  Payment of Expenses.  The Company agrees, whether or not the
transactions hereby contemplated shall be consummated, to reimburse and save the
Administrative Agent and the Documentation Agent  harmless from and against
liability for the payment of all reasonable out-of-pocket costs and expenses
arising in connection with the preparation, execution, delivery, amendment,
modification, waiver and enforcement of, or the preservation of any rights under
this First Amendment, including, without limitation, the reasonable fees and
expenses of any local or other counsel for the Administrative Agent, and all
stamp taxes (including interest and penalties, if any), recording taxes and
fees, filing taxes and fees, and other charges which may be payable in respect
of, or in respect of any modification of, the Credit Agreement and the other
Financing Documents.  The provisions of this Section shall survive the
termination of the Credit Agreement and the repayment of the Loans.

     Section 12.    Governing Law.  THIS FIRST AMENDMENT AND THE RIGHTS AND
OBLIGATIONS OF THE PARTIES HEREUNDER AND UNDER THE CREDIT AGREEMENT SHALL BE
CONSTRUED IN ACCORDANCE WITH AND BE GOVERNED BY THE LAWS OF THE STATE OF NEW
YORK (INCLUDING SECTION 5-1401 OF THE NEW YORK GENERAL OBLIGATIONS LAW, OR ANY
SIMILAR SUCCESSOR PROVISIONS THERETO, BUT EXCLUDING ALL OTHER CONFLICT-OF-LAWS
RULES) AND TO THE EXTENT CONTROLLING, LAWS OF THE UNITED STATES OF AMERICA.

     Section 13.  Descriptive Headings, etc.  The descriptive headings of the
several Sections of this First Amendment are inserted for convenience only and
shall not be deemed to affect the meaning or construction of any of the
provisions hereof.

     Section 14.  Entire Agreement.  This First Amendment and the documents
referred to herein represent the entire understanding of the parties hereto
regarding the subject matter hereof and supersede all prior and contemporaneous
oral and written agreements of the parties hereto with respect to the subject
matter hereof, including, without limitation, any commitment letters regarding
the transactions contemplated by this First Amendment.

     Section 15.  Counterparts.  This First Amendment may be executed in any
number of counterparts (including by telecopy) and by different parties on
separate counterparts and all of such counterparts shall together constitute one
and the same instrument.

     Section 16.  Amendment to Intercreditor Agreement.  The Administrative
Agent is hereby authorized and directed to execute and deliver on behalf of the
Lenders an amendment to the Intercreditor Agreement of even date herewith in the
form of Exhibit A to this First Amendment.

                                       9
<PAGE>
 
     IN WITNESS WHEREOF, the parties hereto have caused this First Amendment to
be duly executed and delivered by their respective duly authorized officers as
of the date first above written.


COMPANY:                      STERLING CHEMICALS, INC.

 


                              By:__________________________________________
                                 Jim P. Wise
                                 Vice President and Chief Financial Officer



ADMINISTRATIVE AGENT          TEXAS COMMERCE BANK
DOCUMENTATION AGENT           NATIONAL ASSOCIATION,
AND THE LENDERS:              Individually and as Administrative Agent



                              By:__________________________________________
                                 Name:
                                 Title:


                              CREDIT SUISSE FIRST BOSTON,
                              Individually and as Documentation Agent



                              By:__________________________________________
                                 Name:
                                 Title:


                              By:__________________________________________
                                 Name:
                                 Title:



                              [Signature Page-1]
<PAGE>
 
                              ABN AMRO BANK N.V.
                              Houston Agency

                              By:   ABN AMRO NORTH AMERICA, INC.
                                    as Agent


                                    By: ___________________________________
                                         Name:
                                         Title:


                                    By: ___________________________________
                                         Name:
                                         Title:


                              THE BANK OF NOVA SCOTIA


                              By: _________________________________________
                                  Name:
                                  Title:


                              BANK OF SCOTLAND


                              By: _________________________________________
                                  Name:
                                  Title:
 

                              [Signature Page-2]
<PAGE>
 
                              BHF-BANK AKTIENGESELLSCHAFT


                              By: _________________________________________
                                  Name:
                                  Title:


                              By: _________________________________________
                                  Name:
                                  Title:


                              THE FIRST NATIONAL BANK OF CHICAGO


                              By: _________________________________________
                                  Name:
                                  Title:


                              THE CIT GROUP/BUSINESS CREDIT, INC.


                              By: _________________________________________
                                  Name:
                                  Title:


                              HIBERNIA NATIONAL BANK


                              By: _________________________________________
                                  Name:
                                  Title:



                              [Signature Page-3]
<PAGE>
 
                              NATIONAL BANK OF CANADA


                              By: _________________________________________
                                  Name:
                                  Title:


                              By: _________________________________________
                                  Name:
                                  Title:


                              OCTAGON CREDIT INVESTORS LOAN PORTFOLIO (a unit of
                              The Chase Manhattan Bank),


                              By: _________________________________________
                                  Name:
                                  Title:


                              MERRILL LYNCH SENIOR FLOATING RATE FUND, INC.


                              By: _________________________________________
                                  Name:
                                  Title:


                              ML CBO IV (CAYMAN) LTD.

                                     By: PROTECTIVE ASSET MANAGEMENT L.L.C. 
                                         AS COLLATERAL MANAGER


                                     By: __________________________________
                                         Name:
                                         Title:



                              [Signature Page-4]
<PAGE>
 
                              VAN KAMPEN AMERICAN CAPITAL PRIME 
                              RATE INCOME TRUST


                              By: _________________________________________
                                  Name:
                                  Title:


                              PARIBAS CAPITAL FUNDING LLC


                              By: _________________________________________
                                  Name:
                                  Title:


                              CAPTIVA II FINANCE LTD.


                              By: _________________________________________
                                  Name:
                                  Title:


                              MORGAN STANLEY SENIOR FUNDING, INC.


                              By: _________________________________________
                                  Name:
                                  Title:


                              MERRILL LYNCH PRIME RATE PORTFOLIO

                                    By:  Merrill Lynch Asset Management, L.P.
                                         as Investment Advisor


                                    By: ___________________________________
                                        Name:
                                        Title:




                              [Signature Page-5]
<PAGE>
 
                              SENIOR DEBT PORTFOLIO

                                    By:  Boston Management and Research,
                                         as Investment Advisor


                                    By: ___________________________________
                                        Name:
                                        Title:


                              SKANDINAVIKA ENSKILDA BANKEN
                              CORPORATION



                              By: _________________________________________
                                  Name:
                                  Title:


                              THE CHASE MANHATTAN BANK



                              By: _________________________________________
                                  Name:
                                  Title:



                              [Signature Page-6]
<PAGE>
 
SUBSIDIARY GUARANTORS:        STERLING CHEMICALS INTERNATIONAL, INC.
                              STERLING CHEMICALS ENERGY, INC.


                              By: _________________________________________
                                  Jim P. Wise
                                  Vice President



                              STERLING CANADA, INC.
                              STERLING PULP CHEMICALS US, INC.
                              STERLING PULP CHEMICALS, INC.
                              STERLING FIBERS, INC.


                              By: _________________________________________
                                  Jim P. Wise
                                  Vice President - Finance



                              [Signature Page-7]
<PAGE>
 
                                   EXHIBIT A
                                       TO
                      FIRST AMENDMENT TO CREDIT AGREEMENT

                                   [FORM OF]
                  [FIRST AMENDMENT TO INTERCREDITOR AGREEMENT]


     THIS FIRST AMENDMENT TO INTERCREDITOR AGREEMENT ("First Amendment") dated
as of March 31, 1997 (the "First Amendment Effective Date") is made and entered
into by and among (i) the banks and other financial institutions (the "Original
Lenders") which are or may from time to time become parties to the Original
Credit Agreement (as hereinafter defined) , TEXAS COMMERCE BANK NATIONAL
ASSOCIATION, as their Administrative Agent (the "Original Administrative
Agent"); (ii) the banks and other financial institutions (the "AFB Lenders")
which are or may  from time to time become parties to the AFB Acquisition Credit
Agreement (as hereinafter defined), by TEXAS COMMERCE BANK NATIONAL ASSOCIATION,
as their administrative agent (the "AFB Administrative Agent") to the AFB
Acquisition Credit Agreement (as hereinafter defined) and STERLING CHEMICALS,
INC., a Delaware corporation (the "Company").


                             INTRODUCTORY STATEMENT
                             ----------------------

     The Company has entered into a credit agreement dated as of June 21, 1996,
among the Company, Texas Commerce Bank National Association, individually, as an
Issuing Bank and as Administrative Agent, Credit Suisse First Boston (formerly
known as Credit Suisse), individually, as an Issuing Bank and as Documentation
Agent, and the financial institutions parties thereto, as amended by the First
Amendment to Credit Agreement dated as of January 31, 1997 (as amended from time
to time, the "Original Credit Agreement").

     The parties to the Original Credit Agreement and the parties to that
certain Credit Agreement dated as of January 31, 1997, by and among the Company,
Texas Commerce Bank National Association, individually, and as Administrative
Agent, Credit Suisse First Boston, individually, and as Documentation Agent, and
the financial institutions parties thereto (as amended, the "AFB Acquisition
Credit Agreement") have entered into an Intercreditor Agreement dated as of
January 31, 1997 (the "Intercreditor Agreement") pursuant to which the parties
thereto agreed to share the proceeds of prepayments of term loans made by the
Company in accordance with the terms thereof.

     The Company intends to issue at least $150,000,000 of additional senior
subordinated notes and will use the proceeds of such senior subordinated notes
to voluntarily prepay the Combined Term Loans (as defined in the Intercreditor
Agreement) pursuant to Section 2.10(c) of the Original Credit Agreement, Section
2.10(b) of the AFB Acquisition Credit Agreement and Section 3.02(b) of the
Intercreditor Agreement.
<PAGE>
 
     The Company has requested that certain covenants in the AFB Acquisition
Credit Agreement be modified and amended and the Original Administrative Agent
and the Administrative Agents, acting on behalf of the Combined Lenders (as
defined in the Intercreditor Agreement) have determined that corresponding
changes and modifications need to be made in the Intercreditor Agreement.

     The Company, the AFB Administrative Agent, the Original Administrative
Agent and the Combined Lenders have agreed, on the terms and conditions herein
set forth, that the Intercreditor Agreement be amended.

                                   AGREEMENT

     Section 1.     Definitions.  Capitalized terms used but not otherwise
defined herein shall have the meaning assigned such terms in the Intercreditor
Agreement.

     Section 2.     Amendments to the Intercreditor Agreement.  On and after
satisfaction of the conditions set forth in Section 3 below, the Intercreditor
Agreement shall be amended as follows:

     (a)  The following new definitions are hereby added to Section 1.01 of the
          Intercreditor Agreement:

               "First Amendment to AFB Acquisition Credit Agreement" shall mean
          the First Amendment to Credit Agreement dated as of March 31, 1997,
          among the AFB Administrative Agent, the Documentation Agent under the
          AFB Acquisition Credit Agreement,  the AFB Lenders signatories thereto
          and the Company.

               "First Amendment to Intercreditor Agreement" shall mean the First
          Amendment to Intercreditor Agreement dated as of March 31, 1997, among
          the AFB Administrative Agent, the Original Administrative Agent, the
          Combined Lenders, and the Company.

               "First Amendment Effective Date" shall mean March 31, 1997.

               "Second Amendment to Original Credit Agreement" shall mean the
          Second Amendment to Credit Agreement dated as of March 31, 1997, among
          the Original Adminstrative Agent, the Original Lenders signatories
          thereto, the Documentation Agent under the Original Credit Agreement
          and the Company.

     (b) The following definitions set forth in Section 1.01 of the
     Intercreditor Agreement are hereby amended in their entirety to read as
     follows:

               "AFB Acquisition Credit Agreement" shall mean the credit
          agreement dated as of even date herewith by and among the Company, the
          AFB Lenders, the AFB Administrative Agent, and Credit Suisse First
          Boston, as documentation agent, as 

                                       2
<PAGE>
 
          amended by the First Amendment to AFB Acquisition Credit Agreement and
          as amended, supplemented or modified from time to time.

               "Intercreditor Agreement" shall mean this Intercreditor
          Agreement, as amended by the First Amendment to Intercreditor
          Agreement and as further amended, modified or supplemented.

               "Original Credit Agreement" shall mean the credit agreement dated
          as of June 21, 1996, by and among the Company, the Lenders, the
          Original Administrative Agent and Credit Suisse First Boston (formerly
          known as Credit Suisse), as documentation agent, as amended by the
          First Amendment to Original Credit Agreement, the Second Amendment to
          Original Credit Agreement, and as further amended, supplemented or
          modified from time to time.

     (c) Section 3.02(b) of the Intercreditor Agreement is hereby amended by
inserting the following proviso in the fifth sentence of such Section
immediately after the words "respective installments of principal thereof" as
they appear in clause (i)(A)(y) of such sentence in such Section:

     "; provided, however, that with respect to the proceeds of the Additional
     Senior Subordinated Notes received by the Administrative Agents as a
     prepayment by the Company pursuant to Section 2.10(b) of the AFB
     Acquisition Credit Agreement, Section 2.10(c) of the Original Credit
     Agreement and this Section 3.02.(b), 50% of such proceeds shall be applied
     pro rata to scheduled amortization payments of the Original Tranche A Term
     Loans, the Original Tranche B Term Loans and the AFB Loans in the order of
     maturity thereof and the balance of such proceeds shall be applied pro rata
     to the respective remaining installments of principal thereof."

      Section 3.   Effectiveness of Amendments Contained in Section 2 of this
First Amendment.  If, but only if, the Administrative Agents has received as a
prepayment from the Company pursuant to the provisions of  Section 2.10(b) of
the AFB Acquisition Credit Agreement, Section 2.10(c) of the Original Credit
Agreement and Section 3.02(b) of the Intercreditor Agreement the proceeds of the
Additional Senior Subordinated Notes in an aggregate principal amount equal to
at least $150,000,000, then shall all the amendments contained in Section 2
hereof become effective.  If the Administrative Agents do not receive such
prepayment from the Company then the amendments contained in Section 2 of this
First Amendment shall be of no force and effect whatsoever.

     Section 4.     Limitations.  The amendments set forth herein are limited
precisely as written and shall not be deemed to (a) be a consent to, or waiver
or modification of, any other term or condition of the Intercreditor Agreement
or any of the other Financing Documents, or (b) except as expressly set forth
herein, prejudice any right or rights which the Combined Lenders may now have or
may have in the future under or in connection with the Intercreditor Agreement,
the Financing Documents or any of the other documents referred to therein.
Except as expressly modified hereby or by express written amendments thereof,
the terms and provisions of the Intercreditor Agreement or any other documents
or instruments executed in connection therewith are and shall remain in full

                                       3
<PAGE>
 
force and effect.  In the event of a conflict between this First Amendment and
any of the foregoing documents, the terms of this First Amendment shall be
controlling.

       Section 5.   Conditions Precedent and Effectiveness.  This First
Amendment shall not be effective until: (a) the First Amendment to AFB
Acquisition Credit Agreement has been executed and delivered by the Required
Lenders thereof; (b) the Second Amendment to Original Credit Agreement has been
executed and delivered by the Required Lenders thereof; (c) this First Amendment
has been executed and delivered by Texas Commerce Bank National Association,
acting in its capacity as the Original Administrative Agent (and in such
capacity as Administrative Agent for the Combined Lenders) and on behalf of the
Original Lenders and as the AFB Administrative Agent and on behalf of the AFB
Lenders; and (d) this First Amendment has been joined and delivered by the
Company.

      Section 6.    No Default.  No Default or Event of Default under either of
the Original Credit Agreement or the AFB Acquisition Credit Agreement shall have
occurred and be continuing as of the First Amendment Effective Date.

      Section 7.    Adoption, Ratification and Confirmation of Intercreditor
Agreement.  Each of the Company, the Administrative Agents, the Documentation
Agents, and the Combined Lenders does hereby adopt, ratify and confirm the
Intercreditor Agreement, as amended hereby, and acknowledges and agrees that the
Intercreditor Agreement, as amended hereby, is and remains in full force and
effect.

     Section 8.     Payment of Expenses.  The Company agrees, whether or not the
transactions hereby contemplated shall be consummated, to reimburse and save the
Administrative Agents and the Documentation Agents  harmless from and against
liability for the payment of all reasonable out-of-pocket costs and expenses
arising in connection with the preparation, execution, delivery, amendment,
modification, waiver and enforcement of, or the preservation of any rights under
this First Amendment, including, without limitation, the reasonable fees and
expenses of any local or other counsel for the Administrative Agents, and all
stamp taxes (including interest and penalties, if any), recording taxes and
fees, filing taxes and fees, and other charges which may be payable in respect
of, or in respect of any modification of, the Intercreditor Agreement and the
other Financing Documents.  The provisions of this Section shall survive the
termination of the Intercreditor Agreement and the repayment of the Combined
Loans.

     Section 9.     Governing Law.  THIS FIRST AMENDMENT AND THE RIGHTS AND
OBLIGATIONS OF THE PARTIES HEREUNDER AND UNDER THE INTERCREDITOR AGREEMENT SHALL
BE CONSTRUED IN ACCORDANCE WITH AND BE GOVERNED BY THE LAWS OF THE STATE OF NEW
YORK (INCLUDING SECTION 5-1401 OF THE NEW YORK GENERAL OBLIGATIONS LAW, OR ANY
SIMILAR SUCCESSOR PROVISIONS THERETO, BUT EXCLUDING ALL OTHER CONFLICT-OF-LAWS
RULES) AND TO THE EXTENT CONTROLLING, LAWS OF THE UNITED STATES OF AMERICA.

     Section 10.    Descriptive Headings, etc.  The descriptive headings of the
several Sections of this First Amendment are inserted for convenience only and
shall not be deemed to affect the meaning or construction of any of the
provisions hereof.

                                       4
<PAGE>
 
     Section 11.    Entire Agreement.  This First Amendment and the documents
referred to herein represent the entire understanding of the parties hereto
regarding the subject matter hereof and supersede all prior and contemporaneous
oral and written agreements of the parties hereto with respect to the subject
matter hereof, including, without limitation, any commitment letters regarding
the transactions contemplated by this First Amendment.

     Section 12.    Counterparts.  This First Amendment may be executed in any
number of counterparts (including by telecopy) and by different parties on
separate counterparts and all of such counterparts shall together constitute one
and the same instrument.

                                       5
<PAGE>
 
     IN WITNESS WHEREOF, the parties hereto have caused this First Amendment to
be duly executed and delivered by their respective duly authorized officers as
of the date first above written.

                                    TEXAS COMMERCE BANK NATIONAL
                                    ASSOCIATION, as Administrative
                                    Agent under the Original Credit
                                    Agreement (and in such capacity, as
                                    Administrative Agent For Combined Lenders) 
                                    and on behalf of the Original Lenders and 
                                    as Administrative Agent under the AFB
                                    Acquisition Credit Agreement and on behalf 
                                    of the AFB Lenders



                                    By:_________________________________
                                          Name:
                                          Title:

JOINDER:

STERLING CHEMICALS, INC.
(as Company under the Original
Credit Agreement and under the
AFB Acquisition Credit Agreement)



By:______________________________
      Name:  Jim P. Wise
      Title:  Vice President and Chief Financial Officer


                             [Signature Page - 1]

<PAGE>
                                                                    EXHIBIT 11.1

                       STERLING CHEMICALS HOLDINGS, INC.
                    COMPUTATION OF FULLY DILUTED NET INCOME
                  PER COMMON AND COMMON EQUIVALENT SHARE/(1)/


<TABLE> 
<CAPTION> 

                                                             THREE             THREE            SIX             SIX
                                                             MONTHS            MONTHS          MONTHS          MONTHS
                                                             ENDED             ENDED           ENDED           ENDED 
                                                            3/31/97           3/31/96         3/31/97         3/31/96 
                                                           --------          ---------       ---------        --------
<S>                                                         <C>               <C>             <C>             <C>
PRIMARY EARNINGS PER SHARE
Weighted average of common stock outstanding                 11,118            55,690           10,860         55,682
Total weighted average shares outstanding primary
 earnings per share computation                              11,118            55,690           10,860         55,682
                                                            =======           =======         ========        =======
Net earnings                                                $(7,811)          $ 6,427         $(15,009)       $19,214
Less: Preferred dividend requirements                          (162)               --             (162)            --
                                                            -------           -------         --------        -------
Net earnings used in primary earnings per share             $(7,973)          $ 6,427         $(15,171)       $19,214
                                                            =======           =======         ========        =======
     NET EARNINGS PER SHARE                                 $ (0.72)          $  0.12         $  (1.40)       $  0.35
                                                            =======           =======         ========        =======

FULLY DILUTED EARNINGS PER SHARE
Weighted average of common stock outstanding                 11,118            55,690           10,860         55,682
Total weighted average shares outstanding fully
 dilutive earnings per share computation                     11,118            55,690           10,860         55,682
                                                            =======           =======         ========        =======
Net earnings                                                $(7,811)          $ 6,427         $(15,009)       $19,214
Less: Preferred dividend requirements                          (162)               --             (162)            --
                                                            -------           -------         --------        -------
Net earnings used in fully dilutive earnings per share      $(7,973)          $ 6,427         $(15,171)       $19,214
                                                            =======           =======         ========        =======
     NET EARNINGS PER SHARE                                 $ (0.72)          $  0.12         $  (1.40)       $  0.35
                                                            =======           =======         ========        =======

</TABLE> 

/(1)/ This calculation is submitted in accordance with Regulation S-K item
      601(b)(11) although not required by footnote 2 to paragraph 14 of APB
      Opinion No. 15 because it results in dilution of less than 3%.



<TABLE> <S> <C>

<PAGE>
<ARTICLE> 5
<LEGEND> EXHIBIT 27.1
</LEGEND>
<CIK> 0000795662
<NAME> STERLING CHEMICAL HOLDINGS INC./TX/
<MULTIPLIER> 1,000
       
<S>                             <C>
<PERIOD-TYPE>                   6-MOS
<FISCAL-YEAR-END>                          SEP-30-1997
<PERIOD-START>                             OCT-01-1996
<PERIOD-END>                               MAR-31-1997
<CASH>                                           6,280
<SECURITIES>                                         0
<RECEIVABLES>                                  159,653
<ALLOWANCES>                                         0
<INVENTORY>                                     75,819
<CURRENT-ASSETS>                               265,114
<PP&E>                                         686,230
<DEPRECIATION>                                 246,665
<TOTAL-ASSETS>                                 831,845
<CURRENT-LIABILITIES>                          155,995
<BONDS>                                        808,576
                           10,162
                                          0
<COMMON>                                           113
<OTHER-SE>                                   (280,938)
<TOTAL-LIABILITY-AND-EQUITY>                   831,845
<SALES>                                        426,689
<TOTAL-REVENUES>                               426,689
<CGS>                                          394,779
<TOTAL-COSTS>                                  394,779
<OTHER-EXPENSES>                                13,349
<LOSS-PROVISION>                                     0
<INTEREST-EXPENSE>                              39,474
<INCOME-PRETAX>                               (20,913)
<INCOME-TAX>                                   (5,904)
<INCOME-CONTINUING>                           (15,009)
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                  (15,009)
<EPS-PRIMARY>                                   (1.40)
<EPS-DILUTED>                                        0
        

</TABLE>

<TABLE> <S> <C>

<PAGE>
<ARTICLE> 5
<LEGEND> EXHIBIT 27.2
</LEGEND>
<CIK> 0001014669
<NAME> STERLING CHEMICAL INC
<MULTIPLIER> 1,000
       
<S>                             <C>
<PERIOD-TYPE>                   6-MOS
<FISCAL-YEAR-END>                          SEP-30-1997
<PERIOD-START>                             OCT-01-1996
<PERIOD-END>                               MAR-31-1997
<CASH>                                           6,280
<SECURITIES>                                         0
<RECEIVABLES>                                  167,209
<ALLOWANCES>                                         0
<INVENTORY>                                     75,819
<CURRENT-ASSETS>                               270,663
<PP&E>                                         686,230
<DEPRECIATION>                                 246,665
<TOTAL-ASSETS>                                 831,200
<CURRENT-LIABILITIES>                          155,990
<BONDS>                                        709,312
                                0
                                          0
<COMMON>                                             0
<OTHER-SE>                                   (175,246)
<TOTAL-LIABILITY-AND-EQUITY>                   831,200
<SALES>                                        426,689
<TOTAL-REVENUES>                               426,689
<CGS>                                          394,779
<TOTAL-COSTS>                                  394,779
<OTHER-EXPENSES>                                12,783
<LOSS-PROVISION>                                     0
<INTEREST-EXPENSE>                              30,024
<INCOME-PRETAX>                               (10,897)
<INCOME-TAX>                                   (3,076)
<INCOME-CONTINUING>                            (7,821)
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                   (7,821)
<EPS-PRIMARY>                                        0
<EPS-DILUTED>                                        0
        

</TABLE>


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