ISOLYSER CO INC /GA/
424B3, 1996-08-05
ORTHOPEDIC, PROSTHETIC & SURGICAL APPLIANCES & SUPPLIES
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<PAGE>
                                     FILED PURSUANT TO RULE 424(b)(3)
                                     REGISTRATION STATEMENT ON FORM S-4 FILE NO.
                                     333-07977
 
                             MICROTEK MEDICAL, INC.
                               512 LEHMBERG ROAD
                          COLUMBUS, MISSISSIPPI 39702
                                 (601) 327-1863
                            ------------------------
 
                                                                  August 1, 1996
Dear Stockholder:
 
    You  are cordially  invited to attend  a Special Meeting  of Stockholders of
Microtek Medical, Inc.  ("Microtek") at 10:00  a.m., local time,  on August  30,
1996,  at  the  executive  offices of  Microtek,  512  Lehmberg  Road, Columbus,
Mississippi (together  with  any  adjournments  or  postponements  thereof,  the
"Microtek Special Meeting") .
 
    At the Microtek Special Meeting, you will be asked to consider and vote upon
a  proposed merger (the "Merger") of MMI Merger Corp., a wholly-owned subsidiary
of Isolyser Company, Inc. ("Isoloyser"), into Microtek. The Merger is  described
in  the attached Notice of Special Meeting and Joint Proxy Statement/Prospectus.
Upon consummation of the Merger, Microtek will become a wholly owned  subsidiary
of  Isolyser, and holders of shares of Microtek Common Stock will be entitled to
receive 1.65 shares of Isolyser Common  Stock for each share of Microtek  Common
Stock.
 
    At  the  meeting,  you will  also  be  asked to  approve  an  amendment (the
"Microtek Option Proposal") to Microtek's 1990 Incentive Stock Option Plan  (the
"Option  Plan")  to  increase the  number  of  shares of  Microtek  Common Stock
issuable upon exercise of  stock options under the  Option Plan from 883,302  to
1,083,302  shares.  Such  stock options  will  be  converted into  the  right to
purchase Isolyser Common Stock if the Merger is consummated.
 
    The  enclosed   Joint  Proxy   Statement/Prospectus  provides   a   detailed
description of the matters to be considered at the Special Meeting and extensive
information  concerning Microtek and Isolyser. A  copy of the Agreement and Plan
of Merger pertaining to  the Merger is  attached as Annex A  to the Joint  Proxy
Statement/Prospectus.   Please  carefully  review  and   consider  all  of  this
information.
 
    Also enclosed is Microtek's Annual Report on Form 10-K/A for the year  ended
November  30, 1995, and  Quarterly Reports on  Form 10-Q for  the quarters ended
February 29, 1996 and May 31, 1996.
 
    AFTER  CAREFUL  CONSIDERATION,  THE  BOARD  OF  DIRECTORS  OF  MICROTEK  HAS
UNANIMOUSLY APPROVED THE MERGER AGREEMENT AND THE OPTION PROPOSAL AND RECOMMENDS
THAT  STOCKHOLDERS  VOTE  "FOR" APPROVAL  AND  ADOPTION OF  THE  PROPOSED MERGER
AGREEMENT AND  "FOR"  THE  MICROTEK  OPTION PROPOSAL  AT  THE  MICROTEK  SPECIAL
MEETING.
 
    It is important that your shares be present at the Microtek Special Meeting,
regardless  of the number of  shares you hold. Therefore,  please sign, date and
return your proxy card as soon as  possible, whether or not you plan to  attend.
This  will not prevent you from voting your shares in person if you subsequently
choose to attend.
 
                                          Very truly yours,
 
                                          /s/ KIMBER L. VOUGHT
                                          Kimber L. Vought
                                          PRESIDENT AND CHIEF EXECUTIVE OFFICER
<PAGE>
                                     [LOGO]
                             ISOLYSER COMPANY, INC.
                       4320 INTERNATIONAL BOULEVARD, N.W.
                            NORCROSS, GEORGIA 30093
                            ------------------------
                                                                  August 1, 1996
Dear Shareholder:
 
    You are cordially invited to attend a Special Meeting of the Shareholders of
Isolyser Company, Inc.  ("Isolyser") at 10:00  a.m., local time,  on August  30,
1996,  at the executive offices of Isolyser, 4320 International Boulevard, N.W.,
Norcross, Georgia (together with any adjournments or postponements thereof,  the
"Isolyser Special Meeting").
 
    At the Isolyser Special Meeting, you will be asked to consider and vote upon
the  proposed  acquisition by  Isolyser of  Microtek Medical,  Inc. ("Microtek")
through a  proposed  merger  (the  "Merger") of  a  wholly-owned  subsidiary  of
Isolyser into Microtek. In the event of the consummation of the Merger, Microtek
would  become a wholly-owned  subsidiary of Isolyser.  To accomplish the Merger,
Isolyser would issue 1.65 shares of Isolyser common stock per share of  Microtek
common  stock. Approval of the  issuance of such Isolyser  common stock is being
sought in compliance with certain rules of The Nasdaq Stock Market.
 
    At the meeting, you will also be asked to approve a proposed amendment  (the
"Isolyser  Option Proposal")  to Isolyser's  Stock Option  Plan (the  "Plan") to
increase the  number  of shares  of  Isolyser  Common Stock  issuable  upon  the
exercise  of stock options under the Plan from 3,600,000 to 4,400,000 shares and
to make certain other technical amendments to the Plan.
 
    The  attached   Joint  Proxy   Statement/Prospectus  provides   a   detailed
description  of the matters to be considered at the Isolyser Special Meeting and
extensive information concerning Microtek and Isolyser. A copy of the  Agreement
and  Plan of Merger pertaining to the Merger is attached as Annex A to the Joint
Proxy Statement/Prospectus. Please  carefully review  and consider  all of  this
information.
 
    YOUR  BOARD OF DIRECTORS BELIEVES THAT THE MERGER IS IN THE BEST INTEREST OF
ISOLYSER AND ITS SHAREHOLDERS. THE BOARD HAS UNANIMOUSLY APPROVED THE MERGER AND
RECOMMENDS THAT YOU VOTE IN FAVOR OF  THE PROPOSAL TO ISSUE THE ISOLYSER  COMMON
STOCK TO CONSUMMATE THE MERGER.
 
    It  is important that your  shares be present at  the meeting, regardless of
the number of  shares you  hold. Therefore, please  sign, date  and return  your
proxy  card as soon as  possible, whether or not you  plan to attend. This shall
not prevent you from voting your shares in person if you subsequently choose  to
attend.
 
                                          Sincerely,
 
                                          /s/ ROBERT L. TAYLOR
                                          Robert L. Taylor,
                                          PRESIDENT, CHIEF EXECUTIVE OFFICER AND
                                          CHAIRMAN OF THE BOARD
<PAGE>
                             MICROTEK MEDICAL, INC.
                   NOTICE OF SPECIAL MEETING OF STOCKHOLDERS
                                 TO BE HELD ON
                                AUGUST 30, 1996
 
To The Stockholders of
Microtek Medical, Inc.:
 
    Notice  is hereby given  that a Special Meeting  of Stockholders of Microtek
Medical, Inc., a Delaware corporation ("Microtek"),  will be held on August  30,
1996,  beginning at 10:00 a.m. local time, at Microtek's offices at 512 Lehmberg
Road, Columbus,  Mississippi (together  with any  adjournments or  postponements
thereof, the "Special Meeting"), for the following purposes:
 
    1.   To consider and vote upon  a proposal to approve that certain Agreement
       and Plan of Merger, dated March 15, 1996 and amended as of June 23,  1996
       and  July  29,  1996 (the  "Merger  Agreement"), by  and  among Microtek,
       Isolyser Company,  Inc.,  a  Georgia corporation  ("Isolyser"),  and  MMI
       Merger  Corp. (the "Isolyser Subsidiary"), pursuant to which, among other
       things, the Isolyser Subsidiary will be merged with and into Microtek and
       Microtek will  become a  wholly owned  subsidiary of  Isolyser, and  each
       issued share of Common Stock of Microtek will be converted into the right
       to receive 1.65 shares of Common Stock of Isolyser;
 
    2.    To consider  and  act upon  a  proposed amendment  to  Microtek's 1990
       Incentive Stock Option Plan (the "Option Plan") to increase the number of
       shares of  Common  Stock of  Microtek  issuable upon  exercise  of  stock
       options  under the Option Plan from 883,302 to 1,083,302 shares of Common
       Stock; and
 
    3.  To transact any other business  as may properly come before the  meeting
       or any adjournment thereof.
 
    Stockholders of record at the close of business on July 8, 1996 are entitled
to notice of and to vote at the meeting or any adjournment thereof.
 
    WHETHER  OR NOT YOU PLAN TO ATTEND THIS MEETING, PLEASE MARK, SIGN, DATE AND
RETURN THE ENCLOSED PROXY CARD AS  PROMPTLY AS POSSIBLE IN THE ENCLOSED  POSTAGE
PAID ENVELOPE.
 
                                          By Order of the Board of Directors
 
                                          /s/ DAN LEE
                                          Dan Lee
                                          SECRETARY
 
Columbus, Mississippi
August 1, 1996
<PAGE>
                                     [LOGO]
                             ISOLYSER COMPANY, INC.
 
                   NOTICE OF SPECIAL MEETING OF SHAREHOLDERS
                                 TO BE HELD ON
                                AUGUST 30, 1996
 
To the Shareholders:
 
    Notice  is  hereby  given that  a  Special  Meeting of  the  Shareholders of
Isolyser Company,  Inc., a  Georgia corporation  ("Isolyser"), will  be held  on
August  30, 1996, beginning at  10:00 a.m. local time,  at Isolyser's offices at
4320 International Boulevard, N.W., Norcross,  Georgia 30093 (together with  any
adjournments or postponements thereof, the "Special Meeting"), for the following
purposes, all as set forth in the attached Joint Proxy Statement/Prospectus:
 
    1.   To consider and vote  upon a proposal to approve  the issuance of up to
       8,758,720 shares of Isolyser common stock, $.001 par value per share,  in
       connection with the merger (the "Merger") of a wholly-owned subsidiary of
       Isolyser  with and into Microtek Medical, Inc. ("Microtek") in accordance
       with that certain Agreement and  Plan of Merger (the "Merger  Agreement")
       dated  as of March 15, 1996 and amended as of June 23, 1996, by and among
       Microtek, Isolyser and MMI Merger Corp. (the "Isolyser Subsidiary"). As a
       result of the Merger, Microtek  will become a wholly-owned subsidiary  of
       Isolyser,  and each share of Microtek common stock will be converted into
       the right to receive 1.65 shares of Isolyser common stock.
 
    2.  To consider and act upon a proposed amendment to Isolyser's Stock Option
       Plan.
 
    3.  To transact any other business  as may properly come before the  meeting
       or any adjournment thereof. No other business is expected to be addressed
       at the meeting.
 
    Shareholders of record at the close of business on July 8, 1996 are entitled
to notice of and to vote at the meeting and any adjournment thereof.
 
    Shareholders are cordially invited to attend the meeting in person. However,
whether  or not you expect to attend, we urge you to read the accompanying Joint
Proxy Statement/Prospectus and then complete, sign, date and return the enclosed
proxy card in the enclosed postage pre-paid envelope. It is important that  your
shares  be represented  at the  meeting, and your  promptness will  assist us to
prepare for the meeting  and to avoid  the cost of a  follow-up mailing. If  you
receive  more than one proxy card because you own shares registered in different
names or  at  different addresses,  each  proxy  card should  be  completed  and
returned.
 
                                          By order of the Board of Directors,
 
                                          /s/ TRAVIS W. HONEYCUTT
                                          Travis W. Honeycutt,
                                          SECRETARY
 
Norcross, Georgia
August 1, 1996
<PAGE>
JOINT PROXY STATEMENT/PROSPECTUS
 
                             JOINT PROXY STATEMENT
                             ISOLYSER COMPANY, INC.
                             MICROTEK MEDICAL, INC.
                SPECIAL MEETINGS OF STOCKHOLDERS OF MICROTEK AND
                         SHAREHOLDERS OF ISOLYSER TO BE
                            HELD ON AUGUST 30, 1996
                            ------------------------
 
                                   PROSPECTUS
                             ISOLYSER COMPANY, INC.
                                  COMMON STOCK
                            ------------------------
 
    This Joint Proxy Statement/Prospectus is being furnished to the shareholders
of  Isolyser Company,  Inc., a  Georgia corporation  ("Isolyser"), in connection
with the solicitation of proxies by the  Board of Directors of Isolyser for  use
at  the Special Meeting of Shareholders  of Isolyser (the "Isolyser Meeting") to
be held at 10:00  a.m., local time,  on August 30,  1996, at 4320  International
Boulevard,  N.W., Norcross, Georgia 30093. At the Isolyser Meeting, the Isolyser
shareholders will be asked to consider and vote upon (i) a proposal (the "Merger
Proposal") to approve the issuance of up to 8,758,720 shares of Isolyser  Common
Stock  in  connection  with  an  Agreement  and  Plan  of  Merger  (the  "Merger
Agreement") dated as of March 15, 1996 and amended as of June 23, 1996 and  July
29,  1996, by and among Isolyser, MMI Merger Corp., a Delaware corporation and a
newly  organized,   wholly-owned   subsidiary   of   Isolyser   (the   "Isolyser
Subsidiary"),  and Microtek Medical, Inc.,  a Delaware corporation ("Microtek"),
pursuant to which Microtek  will become a  wholly-owned subsidiary of  Isolyser,
and  (ii) the approval of  a proposed amendment to  Isolyser's Stock Option Plan
(the "Plan")  to  increase, contingent  upon  consummation of  the  transactions
contemplated  by the Merger Agreement,  the number of shares  of Common Stock of
Isolyser issuable upon exercise of stock  options under the Plan from  3,600,000
to  4,400,000 shares of Common Stock and to make certain technical amendments to
the Plan.
 
    This  Joint   Proxy  Statement/Prospectus   is  also   being  furnished   to
stockholders  of Microtek in connection with  the solicitation of proxies by the
Board of Directors of Microtek for use at the Special Meeting of Stockholders of
Microtek (the  "Microtek Meeting")  to be  held at  10:00 a.m.,  local time,  on
August  30, 1996, at  512 Lehmberg Road, Columbus,  Mississippi. At the Microtek
Meeting, the Microtek stockholders will be asked to consider and vote upon (i) a
proposal to  approve  and adopt  the  Merger  Agreement pursuant  to  which  the
Isolyser  Subsidiary will be merged (the "Merger") with and into Microtek, which
will be  the surviving  corporation,  and Microtek  will become  a  wholly-owned
subsidiary  of  Isolyser,  and (ii)  the  approval  of a  proposed  amendment to
Microtek's 1990 Incentive Stock Option Plan (the "Option Plan") to increase  the
number  of shares of  Common Stock of  Microtek issuable upon  exercise of stock
options under the Option Plan from 883,302 to 1,083,302 shares of Common Stock.
 
    Under the Merger Agreement, Microtek  will become a wholly-owned  subsidiary
of  Isolyser, and holders of  Microtek Common Stock will  be entitled to receive
1.65 shares of Isolyser Common Stock for each share of Microtek Common Stock.
 
    A  copy  of  the   Merger  Agreement  is  attached   to  this  Joint   Proxy
Statement/Prospectus  as Annex  A and is  incorporated herein  by reference. All
capitalized  terms  not  otherwise  defined  in  this  Joint  Proxy   Statement/
Prospectus shall have the meanings given to such terms in the Merger Agreement.
 
    Under   the   rules  of   the  Securities   and  Exchange   Commission  (the
"Commission"), the solicitation of proxies from the stockholders of Microtek  to
approve  and adopt the Merger Agreement  constitutes an offering to stockholders
of Microtek of shares of Isolyser Common Stock. Isolyser has filed  registration
statements  on Form  S-4 (File  Nos. 333-3436  and 333-7977)  (together with any
amendments thereto, the "Registration  Statement") with the Commission  relating
to   such   offering.   All   information   contained   in   this   Joint  Proxy
Statement/Prospectus relating to Isolyser and  the Isolyser Subsidiary has  been
supplied  by Isolyser and all information relating to Microtek has been supplied
by Microtek.
 
    The  principal  executive   offices  of   Isolyser  are   located  at   4320
International  Boulevard, Norcross,  Georgia 30093  and its  telephone number is
(770) 381-7566. The principal executive offices  of Microtek are located at  512
Lehmberg  Road, Columbus,  Mississippi 39702 and  its telephone  number is (601)
327-1863.
 
    This Joint Proxy Statement/Prospectus and the enclosed proxy card are  first
being  mailed to  stockholders of  Isolyser and Microtek  on or  about August 1,
1996.
 
THESE SECURITIES  HAVE  NOT  BEEN  APPROVED OR  DISAPPROVED  BY  THE  SECURITIES
AND  EXCHANGE COMMISSION NOR HAS THE COMMISSION PASSED UPON THE ACCURACY OR
     ADEQUACY   OF   THIS   JOINT   PROXY   STATEMENT/PROSPECTUS.   ANY
         REPRESENTATION  TO THE                      CONTRARY IS A
                               CRIMINAL OFFENSE.
 
                           --------------------------
 
      THE DATE OF THIS JOINT PROXY STATEMENT/PROSPECTUS IS AUGUST 1, 1996.
<PAGE>
                             AVAILABLE INFORMATION
 
    This  Joint  Proxy  Statement/Prospectus  does   not  contain  all  of   the
information  set forth in the Registration  Statement and exhibits thereto which
Isolyser has filed  with the  Commission under the  Securities Act  of 1933,  as
amended (the "Securities Act"). As permitted by the rules and regulations of the
Commission,  this  Joint Proxy  Statement/Prospectus omits  certain information,
exhibits and undertakings contained in the Registration Statement. Reference  is
made  to  the Registration  Statement and  to the  exhibits thereto  for further
information, which  may  be  inspected  without charge  at  the  office  of  the
Commission  at 450 Fifth Street, Washington, D.C. 20549, and copies of which may
be obtained from  the Commission  at prescribed rates.  Statements contained  in
this  Joint Proxy Statement/Prospectus relating to  the contents of any contract
or other document referred  to herein or therein  are not necessarily  complete,
and in each instance, reference is made to the copy of such document filed as an
exhibit  to the Registration Statement. Each  such statement is qualified in its
entirety by such reference.
 
    In addition, both Isolyser (File No. 0-24866) and Microtek (File No.0-20346)
are subject to the informational requirements of the Securities Exchange Act  of
1934, as amended (the "Exchange Act"), and in accordance therewith file reports,
proxy  statements and other information with the Commission. Such reports, proxy
statements and other information filed with the Commission can be inspected  and
copied  at the public reference facilities  maintained by the Commission at Room
1024, 450 Fifth Street, N.W., Washington, D.C. 20549 or at the Regional  Offices
of  the Commission which are located as follows: Northwestern Atrium Center, 500
West Madison Street, Suite 1400, Chicago,  Illinois 60661 and Seven World  Trade
Center,  13th Floor, New York, New York  10048. Copies of such material can also
be obtained from the Commission at  prescribed rates. Written requests for  such
material  should be  addressed to the  Public Reference  Section, Securities and
Exchange Commission, 450 Fifth Street, N.W., Washington, D.C. 20549.
 
               INCORPORATION OF CERTAIN INFORMATION BY REFERENCE
 
    THIS JOINT PROXY  STATEMENT/PROSPECTUS INCORPORATES  BY REFERENCE  DOCUMENTS
RELATING  TO ISOLYSER AND  MICROTEK. DOCUMENTS RELATING  TO ISOLYSER (OTHER THAN
EXHIBITS TO SUCH  DOCUMENTS UNLESS SUCH  EXHIBITS ARE SPECIFICALLY  INCORPORATED
HEREIN  BY  REFERENCE) ARE  AVAILABLE TO  ANY  PERSON, INCLUDING  ANY BENEFICIAL
OWNER, TO WHOM THIS JOINT PROXY STATEMENT/PROSPECTUS IS DELIVERED, ON WRITTEN OR
ORAL REQUEST, WITHOUT  CHARGE, FROM ISOLYSER  COMPANY, INC., 4320  INTERNATIONAL
BOULEVARD, NORCROSS, GEORGIA ATTENTION: C. FRED HARLOW, CHIEF FINANCIAL OFFICER,
TELEPHONE (770) 381-7566. DOCUMENTS RELATING TO MICROTEK (OTHER THAN EXHIBITS TO
SUCH  DOCUMENTS UNLESS  SUCH EXHIBITS  ARE SPECIFICALLY  INCORPORATED THEREIN BY
REFERENCE) ARE AVAILABLE TO ANY PERSON, INCLUDING ANY BENEFICIAL OWNER, TO  WHOM
THIS  JOINT PROXY STATEMENT/PROSPECTUS IS DELIVERED, ON WRITTEN OR ORAL REQUEST,
WITHOUT CHARGE,  FROM  MICROTEK  MEDICAL, INC.,  512  LEHMBERG  ROAD,  COLUMBUS,
MISSISSIPPI 39702, ATTENTION: DAN LEE, CHIEF FINANCIAL OFFICER, TELEPHONE: (601)
327-1863.  IN ORDER TO ENSURE TIMELY DELIVERY OF THE DOCUMENTS, ANY SUCH REQUEST
SHOULD BE MADE BY AUGUST 23, 1996. COPIES OF DOCUMENTS SO REQUESTED WILL BE SENT
BY FIRST CLASS MAIL, POSTAGE PAID WITHIN ONE BUSINESS DAY OF THE RECEIPT OF SUCH
REQUEST.
 
    The following Isolyser documents are incorporated by reference herein:
 
        A.  Annual  Report on Form  10-K for  the year ended  December 31,  1995
    filed with the Commission on April 1, 1996.
 
        B.   Quarterly Report on Form 10-Q  for the quarter ended March 31, 1996
    filed with the Commission on May 15, 1996.
 
        C.  Current Report  on Form 8-K  filed with the  Commission on June  15,
    1995,  as amended by Current Report on  Form 8-K/A filed with the Commission
    on July 17, 1995.
 
        D.  Current Report on Form 8-K  filed with the Commission on October  3,
    1995.
 
        E.   Current Report  on Form 8-K  filed with the  Commission on July 29,
    1996.
 
                                       2
<PAGE>
        F.  The  description of Isolyser  Common Stock set  forth in  Isolyser's
    Registration Statement filed pursuant to Section 12 of the Exchange Act, and
    any amendment or report filed for the purpose of updating such description.
 
    The following Microtek documents are incorporated by reference herein:
 
        1.   Annual Report on Form 10-K for the year ended November 30, 1995, as
    amended and  restated  by  Annual  Report on  Form  10-K/A  filed  with  the
    Commission on May 23, 1996 (as so amended, the "1995 Microtek 10-K").
 
        2.   Quarterly Reports on Form 10-Q  for the quarters ended February 29,
    1996 and May 31, 1996 filed with  the Commission on April 12, 1996 and  July
    15, 1996, respectively (collectively, the "Microtek 10-Qs").
 
        3.   Current  Report on Form  8-K filed  with the Commission  on May 15,
    1996.
 
        All documents filed by Isolyser or Microtek with the Commission pursuant
    to Sections 13(a), 13(c),  14 or 15(d)  of the Exchange  Act after the  date
    hereof  and  prior to  the date  of  the Isolyser  Meeting and  the Microtek
    Meeting shall be deemed to be incorporated by reference herein and shall  be
    a  part hereof  from the  date of filing  of such  documents. Any statements
    contained in a  document incorporated  by reference herein  or contained  in
    this  Joint Proxy  Statement/Prospectus shall  be deemed  to be  modified or
    superseded for  purposes hereof  to the  extent that  a statement  contained
    herein   (or  in  any  other  subsequently  filed  document  which  also  is
    incorporated by reference herein) modifies or supersedes such statement. Any
    statement so modified or superseded shall not be deemed to constitute a part
    hereof except as so modified or superseded.
 
                            ------------------------
 
    The 1995 Microtek 10-K and the  Microtek 10-Qs are delivered in  conjunction
with this Joint Proxy Statement/Prospectus.
 
    NO  PERSON  HAS BEEN  AUTHORIZED  TO GIVE  ANY  INFORMATION OR  TO  MAKE ANY
REPRESENTATION  NOT  CONTAINED  IN  THIS  JOINT  PROXY  STATEMENT/PROSPECTUS  IN
CONNECTION  WITH THE OFFERS MADE HEREBY, AND, IF GIVEN OR MADE, SUCH INFORMATION
OR REPRESENTATION MUST NOT BE RELIED UPON AS HAVING BEEN AUTHORIZED BY  ISOLYSER
OR  MICROTEK. THIS JOINT PROXY STATEMENT/PROSPECTUS DOES NOT CONSTITUTE AN OFFER
TO SELL OR A SOLICITATION OF AN OFFER TO BUY ANY SECURITIES OTHER THAN THOSE  TO
WHICH IT RELATES OR AN OFFER TO SELL OR A SOLICITATION OF AN OFFER TO BUY ANY OF
THE  SECURITIES OFFERED HEREBY TO ANY PERSON TO WHOM IT IS UNLAWFUL TO MAKE SUCH
OFFER IN SUCH PERSON'S  JURISDICTION. NEITHER THE DELIVERY  OF THIS JOINT  PROXY
STATEMENT/PROSPECTUS NOR ANY SALE MADE HEREUNDER SHALL, UNDER ANY CIRCUMSTANCES,
CREATE   AN   IMPLICATION   THAT,   SINCE  THE   DATE   OF   THIS   JOINT  PROXY
STATEMENT/PROSPECTUS, THERE HAS  BEEN NO CHANGE  IN THE AFFAIRS  OF ISOLYSER  OR
MICROTEK.
 
                                       3
<PAGE>
                               TABLE OF CONTENTS
 
<TABLE>
<CAPTION>
                                                                            PAGE
                                                                            ----
<S>                                                                         <C>
Available Information.....................................................     2
Incorporation of Certain Information by Reference.........................     2
Summary of Joint Proxy Statement/Prospectus...............................     5
The Meetings..............................................................    16
The Merger................................................................    17
Isolyser and Microtek Pro Forma Combined Financial Information............    40
Isolyser Pro Forma Combined Financial Information.........................    47
Microtek Pro Forma Combined Financial Information.........................    49
Comparative Rights of Isolyser Shareholders and Microtek Stockholders.....    54
Option Proposals..........................................................    61
Legal Matters.............................................................    66
Experts...................................................................    66
Stockholder's Proposals...................................................    66
Annex A Agreement and Plan of Merger......................................   A-1
Annex B Opinion of Morgan Keegan & Company, Inc...........................   B-1
Annex C Opinion of Goldman, Sachs & Co....................................   C-1
</TABLE>
 
                                       4
<PAGE>
                  SUMMARY OF JOINT PROXY STATEMENT/PROSPECTUS
 
    THE  FOLLOWING IS  A SUMMARY OF  CERTAIN INFORMATION  CONTAINED ELSEWHERE IN
THIS JOINT PROXY STATEMENT/PROSPECTUS. THE SUMMARY IS NECESSARILY INCOMPLETE AND
SELECTIVE AND IS  QUALIFIED IN  ITS ENTIRETY  BY THE  MORE DETAILED  INFORMATION
CONTAINED  IN  THIS  JOINT  PROXY  STATEMENT/PROSPECTUS,  INCLUDING  THE ANNEXES
HERETO. THE  TERMS  "MICROTEK" AND  "ISOLYSER"  REFER RESPECTIVELY  TO  MICROTEK
MEDICAL,   INC.  AND  ITS  SUBSIDIARIES  AND  ISOLYSER  COMPANY,  INC.  AND  ITS
SUBSIDIARIES, UNLESS THE CONTEXT OTHERWISE REQUIRES.
 
                                    GENERAL
 
    This Joint Proxy  Statement/Prospectus relates to  the proposed merger  (the
"Merger")  of  MMI  Merger Corp.,  a  wholly-owned subsidiary  of  Isolyser (the
"Isolyser Subsidiary"),  into Microtek  pursuant  to an  Agreement and  Plan  of
Merger  dated March  15, 1996 (the  "Original Merger Agreement"),  as amended on
June 23, 1996 and July 29, 1996 (and as amended, the "Merger Agreeement"). Under
the Merger Agreement, Microtek will become a wholly-owned subsidiary of Isolyser
and holders of shares of Microtek Common Stock will be entitled to receive  1.65
shares  of Isolyser Common  Stock for each  share of Microtek  Common Stock (the
"Exchange Ratio"). See "The Merger." This Joint Proxy Statement/Prospectus  also
relates  to  (i)  a  proposed  amendment  (the  "Isolyser  Option  Proposal") to
Isolyser's  Stock  Option  Plan  (the  "Plan")  to  increase,  contingent   upon
consummation  of  the transactions  contemplated  by the  Merger  Agreement, the
number of  shares of  Isolyser  Common Stock  issuable  upon exercise  of  stock
options  under the Plan from  3,600,000 to 4,400,000 shares  and to make certain
technical amendments to the Plan, and  (ii) a proposed amendment (the  "Microtek
Option  Proposal") to Microtek's  1990 Incentive Stock  Option Plan (the "Option
Plan") to increase  the number  of shares  Microtek Common  Stock issuable  upon
exercise  of  stock options  under  the Option  Plan  from 883,302  to 1,083,302
shares. See "Option Proposals."
 
                                  THE PARTIES
 
    ISOLYSER.   Isolyser develops  and manufactures  OREX-Registered  Trademark-
Degradables-TM-,  a  series of  products made  from  a thermoplastic,  hot water
soluble polymer that can be configured into  an array of products such as  woven
and  non-woven fabrics, film and thermoformed and extruded items. These products
can  be  dissolved   after  use,   in  hot   water  in   a  specially   designed
OREX-Registered  Trademark- processor  similar to a  commercial washing machine,
for safe disposal through municipal  sewer systems. Isolyser believes that  this
line  of  products  provides  protection  to  the  hospital  staff,  patient and
environment while providing cost-effective solutions to the problems  associated
with waste reduction and disposal.
 
    MICROTEK.    Microtek  designs,  manufactures and  sells  a  broad  range of
surgical and medical supplies  for use in targeted  niche markets in the  health
care  industry.  Its principal  product lines  are  infection and  fluid control
products, including  disposable drapes  for  covering operating  room  equipment
during  surgical procedures  and pouches that  attach to the  surgical drapes to
collect and contain fluids during surgical procedures.
 
                                  THE MEETINGS
 
    ISOLYSER MEETING.  The Isolyser Meeting will be held on August 30, 1996,  at
10:00  a.m.,  local  time,  at  Isolyser's  executive  offices  located  at 4320
International Boulevard, N.W., Norcross, Georgia 30093. At the Isolyser Meeting,
the Isolyser shareholders will be asked to consider and vote upon (i) a proposal
(the "Merger Proposal")  to approve the  issuance of up  to 8,758,720 shares  of
Isolyser  Common  Stock in  connection with  the Merger,  and (ii)  the Isolyser
Option Proposal.
 
    The close of business on July 8, 1996, has been fixed as the record date for
the determination of Isolyser shareholders entitled to receive notice of and  to
vote at the Isolyser meeting. As of the close of business on such date, Isolyser
had outstanding and entitled to vote 31,072,545 shares of Isolyser Common Stock.
 
                                       5
<PAGE>
    A  majority of the outstanding shares of Isolyser Common Stock on the record
date must be represented in person or by proxy at the Isolyser Meeting in  order
to  constitute a quorum  for the transaction  of business. The  record holder of
each share of  Isolyser Common Stock  entitled to vote  at the Isolyser  Meeting
will  have  one vote  for each  share so  held. Abstentions  will be  treated as
Isolyser Common Stock present and entitled  to vote for purposes of  determining
the presence of a quorum. If a broker indicates on a proxy that it does not have
the  discretionary  authority as  to certain  Isolyser  Common Stock  (a "Broker
Non-Vote"), those shares  will be considered  in determining the  presence of  a
quorum  but will have  no effect on  the Merger Proposal  or the Isolyser Option
Proposal. The affirmative vote  of the holders  of a majority  of the shares  of
Isolyser  Common Stock voting at the Isolyser meeting is required to approve the
Merger Proposal. The  affirmative vote  of the holders  of the  majority of  the
shares  represented at the Isolyser Meeting will be required for the approval of
the Isolyser Option Proposal and any other proposal submitted for a vote at  the
Isolyser Meeting.
 
    As  of July 8, 1996, the directors  and executive officers of Isolyser owned
of record approximately 20% of the  shares of Isolyser Common Stock entitled  to
vote at the Isolyser Meeting. Of those shares, Messrs. Taylor and Honeycutt have
granted to Microtek a proxy to vote all of their shares of Isolyser Common Stock
in  favor of the Merger Proposal  representing approximately 19% of the Isolyser
Common Stock outstanding on such date. See "The Meetings -- Isolyser Meeting".
 
    MICROTEK MEETING.  The Microtek Meeting will be held on August 30, 1996,  at
10:00  a.m., local time, at Microtek's executive offices located at 512 Lehmberg
Road, Columbus,  Mississippi  39702.  At  the  Microtek  Meeting,  the  Microtek
stockholders  will  be asked  to consider  and  vote upon  (i) the  approval and
adoption of the Merger Agreement, and  (ii) the approval of the Microtek  Option
Proposal.
 
    The close of business on July 8, 1996, has been fixed as the record date for
the  determination of stockholders entitled to receive  notice of and to vote at
the Microtek Meeting. As  of the close  of business on  such date, Microtek  had
outstanding  and entitled to  vote 4,680,585 shares of  Microtek Common Stock. A
majority of the outstanding shares of  Microtek Common Stock on the record  date
must  be represented in person  or by proxy at the  Microtek Meeting in order to
constitute a quorum for the transaction  of business. The record holder of  each
share  of Microtek Common  Stock entitled to  vote at the  Microtek Meeting will
have one vote for each  share so held. Abstentions  will be treated as  Microtek
Common  Stock  present and  entitled  to vote  for  purposes of  determining the
presence of a quorum. In the event  of any Broker Non-Votes with respect to  any
proposal,  such vote will be considered in  determining the presence of a quorum
but will have no effect  with respect to that  proposal. Approval of the  Merger
Agreement requires the affirmative vote of holders of the majority of the issued
and  outstanding Microtek Common Stock. The affirmative vote of the holders of a
majority of the shares represented at the Microtek Meeting will be required  for
the  approval of the Microtek Option  Proposal and any other proposals submitted
for a vote at the Microtek Meeting.
 
    Certain stockholders of  Microtek who at  the record date  for the  Microtek
Meeting  collectively owned approximately 46% of the outstanding Microtek Common
Stock have granted Isolyser an irrevocable  proxy to vote all of their  Microtek
Common  Stock  in favor  of the  proposed Merger.  In addition,  those officers,
directors and affiliates of  Microtek who have not  granted proxies to  Isolyser
own  of record approximately 2% of the  shares of Microtek Common Stock entitled
to vote at the Microtek Meeting. See "The Meetings -- Microtek Meeting".
 
                                   THE MERGER
 
    GENERAL.  Pursuant to the proposed  Merger, the Isolyser Subsidiary will  be
merged  into Microtek,  and Microtek  will become  a wholly-owned  subsidiary of
Isolyser. Upon completion  of the Merger,  each share of  Microtek Common  Stock
will  be converted  into the  right to  receive 1.65  shares of  Isolyser Common
Stock. See "The Merger -- General."
 
    ISOLYSER'S REASONS FOR THE  MERGER AND RECOMMENDATION  OF ISOLYSER BOARD  OF
DIRECTORS.    Upon  consultation  with its  legal  and  financial  advisors, and
following consideration of a number of business
 
                                       6
<PAGE>
issues and factors, the Board of  Directors of Isolyser has determined that  the
Merger  is  in the  best interest  of  Isolyser. See  "The Merger  -- Isolyser's
Reasons for  the Merger"  for a  discussion  of the  factors considered  by  the
Isolyser Board in reaching such determination. The Isolyser Board has determined
that  the terms  of the Merger  Agreement, which were  established through arms'
length bargaining with  Microtek, are  fair to, and  in the  best interests  of,
Isolyser's   shareholders.  ACCORDINGLY,  THE  ISOLYSER  BOARD  HAS  UNANIMOUSLY
APPROVED THE  MERGER  AGREEMENT AND  UNANIMOUSLY  RECOMMENDS THAT  THE  ISOLYSER
SHAREHOLDERS VOTE FOR THE MERGER PROPOSAL.
 
    MICROTEK'S  REASONS FOR THE  MERGER AND RECOMMENDATION  OF MICROTEK BOARD OF
DIRECTORS.  In reaching its determination to recommend the Merger, the  Microtek
Board consulted with Microtek's management and its financial and legal advisors.
See "The Merger -- Microtek's Reasons for the Merger" regarding the factors that
the  Microtek Board considered in reaching  its decision. The Microtek Board has
determined that  the  terms of  the  Merger Agreement,  which  were  established
through  arms' length  bargaining with  Isolyser, are fair  to, and  in the best
interests of, Microtek and its stockholders. ACCORDINGLY, THE MICROTEK BOARD HAS
UNANIMOUSLY APPROVED THE  MERGER AGREEMENT AND  UNANIMOUSLY RECOMMENDS THAT  THE
MICROTEK STOCKHOLDERS VOTE FOR APPROVAL AND ADOPTION OF THE MERGER AGREEMENT.
 
    OPINION  OF ISOLYSER'S  FINANCIAL ADVISOR.   Morgan  Keegan &  Company, Inc.
("Morgan Keegan") has  delivered its written  opinion to the  Isolyser Board  of
Directors,  dated  June 21,  1996,  to the  effect that,  as  of such  date, the
"Transaction Consideration" (as  defined in  Morgan Keegan's  Opinion) is  fair,
from a financial point of view, to the shareholders of Isolyser. For purposes of
such  opinion, the  "Transaction Consideration"  was defined  as such  number of
shares of Isolyser Common Stock as is equal to the quotient obtained by dividing
$16.50 by the average closing price per share of Isolyser Common Stock (but  not
lower  than $10.00 or higher than $15.00)  on The Nasdaq Stock Market ("Nasdaq")
for the 20 trading days immediately  preceding the fifth trading day before  the
consummation  of the Merger. A copy of  the opinion of Morgan Keegan, which sets
forth the  assumptions  made,  matters considered  and  limitations  on  reviews
undertaken, is attached to this Joint Proxy Statement/ Prospectus as Annex B and
is  incorporated herein by reference. Shareholders of Isolyser are urged to, and
should, read  such  opinion in  its  entirety. See  "The  Merger --  Opinion  of
Isolyser's Financial Advisor."
 
    OPINION OF MICROTEK'S FINANCIAL ADVISOR.  On July 29, 1996, Goldman, Sachs &
Co.  ("Goldman  Sachs")  delivered its  opinion  to  the Board  of  Directors of
Microtek that, as of the  date of such opinion,  the Exchange Ratio pursuant  to
the  Merger Agreement is fair to the holders of shares of Microtek Common Stock.
The full  text  of  the written  opinion  of  Goldman Sachs,  which  sets  forth
assumptions made, matters considered and limitations on the review undertaken in
connection  with the opinion, is attached hereto  as Annex C and is incorporated
herein by reference. HOLDERS  OF SHARES OF MICROTEK  COMMON STOCK ARE URGED  TO,
AND  SHOULD, READ SUCH  OPINION IN ITS  ENTIRETY. See "The  Merger -- Opinion of
Microtek's Financial Advisor."
 
    RISK FACTORS.  An investment in  shares of Isolyser Common Stock involves  a
high  degree of risk. Isolyser's future performance will depend to a substantial
degree  upon  market  acceptance  of  and  Isolyser's  ability  to  successfully
manufacture,  market, deliver and expand its  OREX Degradables line of products.
Isolyser only recently began to sell  OREX Degradables in material amounts,  and
incurred operating and net losses for the years ended December 31, 1994 and 1995
and  the three-month  and six-month  periods ended  June 30,  1996. Accordingly,
Microtek stockholders should  carefully consider the  risk factors beginning  on
page 16 of Isolyser's Annual Report on Form 10-K for the year ended December 31,
1995  incorporated herein by reference  including, without limitation, such risk
factors captioned  "Limited  Operating  History;  Net  Losses,"  "Risks  of  New
Products" and "Manufacturing and Supply Risks."
 
                                       7
<PAGE>
    EFFECTIVE  DATE OF THE MERGER.  It is currently contemplated that the Merger
will be  consummated as  soon as  practicable after  the Isolyser  and  Microtek
Meetings.  The Merger  will be  effective upon  the filing  of a  Certificate of
Merger with the Secretary of State of Delaware (the "Effective Date").
 
    EXCHANGE OF MICROTEK STOCK CERTIFICATES.   As soon as practicable after  the
Effective  Date, instructions and  a letter of transmittal  will be furnished to
all Microtek stockholders  for use  in exchanging their  stock certificates  for
certificates  evidencing  the  shares  of Isolyser  Common  Stock  they  will be
entitled to receive as a result  of the Merger. STOCKHOLDERS OF MICROTEK  SHOULD
NOT  SUBMIT THEIR  STOCK CERTIFICATES FOR  EXCHANGE UNTIL  SUCH INSTRUCTIONS AND
LETTER OF TRANSMITTAL ARE RECEIVED. See "The Merger -- Exchange of  Certificates
Representing Microtek Shares."
 
    OPERATIONS  OF MICROTEK  AFTER THE MERGER.   Following  the Merger, Microtek
will be  operated as  a  wholly-owned subsidiary  of  Isolyser. Although  it  is
anticipated that the current executive officers of Microtek will continue as the
executive  officers of Microtek following the  consummation of the Merger, it is
not anticipated that  employment agreements  will be entered  into between  such
executive  officers, on  the one  hand, and either  Microtek or  Isolyser on the
other. See "The Merger -- Interests of Certain Persons in the Merger."
 
    NO SOLICITATION.   The  Merger Agreement  provides that  Microtek will  not,
directly  or indirectly, (i) solicit or  initiate discussions with or (ii) enter
into any negotiations or agreements with, or furnish any information that is not
publicly available to,  any third party  concerning any proposal  for a  merger,
sale  of substantial  assets, sale  of shares  of stock  or securities  or other
takeover or  business  combination transaction  (collectively,  an  "Acquisition
Proposal"),  subject to  the fiduciary  duties of  the Microtek  Board. See "The
Merger -- Certain Covenants."
 
    NO APPRAISAL  RIGHTS.   Microtek  stockholders will  not have  appraisal  or
dissenters' rights with respect to the Merger.
 
    CERTAIN  FEDERAL INCOME TAX CONSEQUENCES.  Neither Microtek nor Isolyser has
requested, nor will they  receive, an advance ruling  from the Internal  Revenue
Service  as to the tax consequences of the Merger. As contemplated by the Merger
Agreement, it is  a condition  to the  closing of  the Merger  that counsel  for
Isolyser  deliver an opinion, subject  to certain qualifications and conditions,
with respect to certain federal income tax consequences of the Merger  including
(i)  that  the Merger  will constitute  a reorganization  within the  meaning of
Section 368(a) of the  Internal Revenue Code of  1986, as amended (the  "Code"),
and  (ii) that no gain or loss will be recognized by a Microtek stockholder as a
result of the Merger with respect  to shares of Microtek Common Stock  converted
solely  into  Isolyser  Common  Stock.  All  Microtek  stockholders  should read
carefully  the  discussion  in  "The  Merger  --  Certain  Federal  Income   Tax
Consequences"  and other sections of this Joint Proxy Statement/Prospectus. They
are urged to consult their own tax  advisors as to the specific consequences  to
them  of the  Merger under  federal, state, local  and any  other applicable tax
laws. See "The Merger -- Certain Federal Income Tax Consequences."
 
    ACCOUNTING TREATMENT.  It is a condition to the Merger that it shall qualify
as a pooling-of-interests for accounting  and financial reporting purposes.  See
"The Merger -- Accounting Treatment."
 
    CONDITIONS  OF THE MERGER.   In addition to approval  by the stockholders of
Isolyser and Microtek, consummation of the Merger is subject to the satisfaction
or waiver of  a number of  conditions and to  certain regulatory matters.  Other
than  approval  of the  Merger  by the  Isolyser  shareholders and  the Microtek
stockholders, substantially all of the conditions  to the Merger may be  waived,
in  whole or in part,  by the parties for whose  benefit they have been created,
without the approval of their  respective stockholders. However, after  approval
by  the stockholders of Isolyser and  Microtek, no amendment or modification may
be made which by law requires further approval by such stockholders unless  such
approval  is obtained.  In addition, the  Merger may be  abandoned under certain
circumstances, and such abandonment will  not require stockholder approval.  See
"The Merger -- Conditions to the Merger," "-- Amendment of the Merger Agreement;
Waiver of Conditions" and "-- Certain Regulatory Matters."
 
                                       8
<PAGE>
    TERMINATION.    The  Merger  Agreement  may  be  terminated  and  the Merger
abandoned, at any time prior to the Effective Date, whether before or after  the
approval  by the Isolyser or Microtek stockholders, (i) by the mutual consent of
Isolyser  and  Microtek;  (ii)  by  Isolyser  if  there  has  been  a   material
misrepresentation or breach of warranty in the representations and warranties of
Microtek  made in the Merger Agreement, or  there has been a material failure by
Microtek to comply with its obligations  under the Merger Agreement, subject  to
certain   exceptions;  (iii)   by  Microtek  if   there  has   been  a  material
misrepresentation or breach of warranty in the representations and warranties of
Isolyser made in the Merger Agreement, or  there has been a material failure  by
Isolyser  to comply with its obligations  under the Merger Agreement, subject to
certain exceptions; (iv)  by either Isolyser  or Microtek if  all conditions  to
that  party's obligation  to consummate  the Merger  have not  been satisfied or
waived by September 30, 1996, unless such failure of consummation is due to  the
failure   of  the  terminating  party  to  perform  or  observe  the  covenants,
agreements, and conditions  to be  performed or observed  by it;  (v) by  either
Isolyser  or  Microtek  if the  consummation  of  the Merger  would  violate any
nonappealable final order, decree or judgment of any court or governmental  body
or  agency having competent jurisdiction; (vi) by Microtek if in the exercise of
the good faith judgment of its Board of Directors (which judgment is based  upon
the  advice of independent, outside legal counsel) as to its fiduciary duties to
its stockholders  such  termination is  required  by reason  of  an  Acquisition
Proposal;  or (vii) by Isolyser, if the Microtek Board of Directors withdraws or
materially modifies  or  changes  its  recommendation  to  the  stockholders  of
Microtek  to approve  the Merger  Agreement and the  Merger. See  "The Merger --
Termination of  Merger Agreement"  and "--  Amendment of  the Merger  Agreement;
Waiver of Conditions."
 
    TERMINATION  FEE.  Whether or  not the Merger is  consummated, all costs and
expenses incurred in connection with  the Merger Agreement and the  transactions
contemplated thereby will be paid by the party incurring such costs or expenses.
Notwithstanding  the foregoing, if (a)  Microtek terminates the Merger Agreement
because its  Board of  Directors, in  the exercise  of its  good faith  judgment
(based  upon advice of independent, outside  counsel) as to its fiduciary duties
to its stockholders  determines such  termination is  required by  reason of  an
Acquisition Proposal; (b) the Merger Agreement is terminated by Isolyser because
the  Microtek Board of Directors withdraws or materially modifies or changes its
recommendation to the stockholders of  Microtek to approve the Merger  Agreement
and  the Merger;  or (c) on  or before September  30, 1996 and  while the Merger
Agreement remains in effect,  Microtek enters into  a definitive agreement  with
respect  to an Acquisition Proposal with any corporation, partnership, person or
other entity or group  (other than Isolyser or  any affiliate of Isolyser),  and
such  transaction (including any revised  transaction based upon the Acquisition
Proposal) is  thereafter  consummated (whether  before  or after  September  30,
1996),  then Microtek  shall pay  to Isolyser  a fee  of $2.5  million. See "The
Merger -- Fees and Expenses."
 
    COMPARATIVE RIGHTS OF ISOLYSER SHAREHOLDERS AND MICROTEK
STOCKHOLDERS.  Isolyser is incorporated under  the laws of the State of  Georgia
and  Microtek  is  incorporated  under  the  laws  of  the  State  of  Delaware.
Stockholders of Microtek will, upon consummation of the Merger and to the extent
they receive Isolyser Common Stock,  become stockholders of Isolyser, and  their
rights  as  such will  be governed  by  Georgia law  and Isolyser's  Articles of
Incorporation and Bylaws. See "Comparative  Rights of Isolyser Shareholders  and
Microtek Stockholders."
 
                              THE OPTION PROPOSALS
 
    ISOLYSER  OPTION PROPOSAL.  The Board of Directors of Isolyser has approved,
adopted and  recommended  to  the  shareholders  of  Isolyser  an  amendment  to
Isolyser's  Plan to increase,  contingent upon consummation  of the transactions
contemplated by the Merger  Agreement, the number of  shares of Isolyser  Common
Stock  subject  to the  Plan from  3,600,000  to 4,400,000  shares, and  to make
certain technical amendments to  the Plan. The consummation  of the Merger  will
result  in  the issued  and  outstanding Microtek  options  at July  1,  1996 to
purchase a total of 627,730 shares of Microtek Common Stock being converted into
stock  options   to  purchase   a  total   of  1,035,755   shares  of   Isolyser
 
                                       9
<PAGE>
Common Stock. The affirmative vote of the holders of a majority of the shares of
Isolyser  Common Stock represented at the  Isolyser Meeting will be required for
the  approval  of  the  Isolyser  Option  Proposal.  See  "Option  Proposals  --
Isolyser's Option Proposal."
 
    MICROTEK  OPTION PROPOSAL.  The Board of Directors of Microtek has approved,
subject to stockholder approval  by the Microtek  stockholders, the increase  of
the  number of shares of  Microtek Common Stock subject  to the Option Plan from
883,302 shares to  1,083,302 shares,  in order that  the Option  Plan will  have
enough available shares to cover option grants made by the Board of Directors in
November  and December  1995, which  option grants  exceeded the  number of then
authorized shares available for grant pursuant to the Option Plan and were  made
subject  to and contingent upon stockholder approval. If the Merger Agreement is
approved by  the  Microtek  stockholders  and  the  Merger  is  consummated,  no
additional  options  will be  granted under  the Option  Plan. In  addition, the
Merger Agreement prohibits the further grant of options by Microtek prior to the
Merger. The affirmative  vote of  the holders  of a  majority of  the shares  of
Microtek  Common Stock represented at the  Microtek Meeting will be required for
the  approval  of  the  Microtek  Option  Proposal.  See  "Option  Proposals  --
Microtek's Option Proposal."
 
        SUMMARY HISTORICAL AND PRO FORMA SELECTED FINANCIAL INFORMATION
 
    The   following  tables  set  forth   (i)  selected  consolidated  financial
information for Isolyser  for and as  of each of  the five years  in the  period
ended  December 31, 1995, and  the three-month periods ended  March 31, 1995 and
1996, (ii) selected financial information for Microtek for and as of each of the
five years in the  period ended November 30,  1995, and the three-month  periods
ended  February 28, 1995 and February 29, 1996, and (iii) selected unaudited pro
forma combined information  giving effect  to the  Merger under  the pooling  of
interests  method  of  accounting.  The selected  unaudited  pro  forma combined
balance sheet information as  of March 31,  1996 gives effect  to the Merger  as
though  it had been consummated  on that date. The  selected unaudited pro forma
combined balance sheet  information as of  March 31, 1996  also gives effect  to
Microtek's  acquisition  of Venodyne  a division  of Advanced  Instruments, Inc.
("Venodyne") on April 27,  1996 as if such  acquisition had ocurred on  February
29,  1996. The  selected unaudited pro  forma combined  statements of operations
information for  the  years ended  December  31, 1993,  1994  and 1995  and  the
three-month period ended March 31, 1996, gives effect to the Merger as if it had
occurred  at the beginning  of the earliest  year presented. For  the year ended
December 31,  1995, the  selected unaudited  pro forma  statement of  operations
information   also  gives   effect  to  Isolyser's   acquisitions  of  SafeWaste
Corporation ("SafeWaste")  on May  31, 1995  and White  Knight Healthcare,  Inc.
("White  Knight")  effective September  1,  1995 and  Microtek's  acquisition of
Medi-Plast International, Inc. ("Medi-Plast") on November 30, 1995, and Venodyne
on April 27,  1996 as  if such  acquisitions had  occurred at  the beginning  of
Isolyser's  and Microtek's fiscal  years, January 1, 1995  and December 1, 1994,
respectively. For the three-months ended March 31, 1996, the selected  unaudited
pro  forma statement of  operations information also  gives effect to Microtek's
acquisition of Venodyne as if such acquisition had occurred at December 1, 1994.
For purposes of this selected  unaudited pro forma combined financial  statement
information,  the balance sheet and statements of operations information combine
Microtek's balance  sheet  as  of  February  29,  1996  and  its  statements  of
operations  for  the years  ended  November 30,  1993,  1994 and  1995,  and the
three-month period ended February 29,  1996, respectively, as Microtek's  fiscal
year ends on November 30.
 
    The selected pro forma combined information is not necessarily indicative of
the  operating results and financial position  that would have been reported had
the Merger and the SafeWaste, White Knight, Medi-Plast and Venodyne acquisitions
occurred at the pro forma dates  specified, nor is it necessarily indicative  of
future results.
 
    The  selected information set forth below should be read in conjunction with
(i) the pro forma combined financial information included elsewhere herein, (ii)
the historical consolidated  financial statements  and notes  thereto and  other
financial  information  included in  Isolyser's  and Microtek's  separate Annual
Reports on Form  10-K for the  years ended  December 31, 1995  and November  30,
1995,  respectively, and  Quarterly Reports  on Form  10-Q for  the three-months
ended March 31, 1996
 
                                       10
<PAGE>
and February 29, 1996, respectively, incorporated by reference herein, (iii) the
historical financial  statements  of  SafeWaste and  White  Knight  included  in
Isolyser's  Current Reports on  Form 8-K filed  with the Commission  on June 15,
1995 and October  3, 1995,  respectively, incorporated by  reference herein  and
(iv)  the historical financial statements of Medi-Plast and Venodyne included in
Microtek's Annual  Report on  Form 10-K  for the  year ended  November 30,  1995
incorporated by reference herein.
 
                             ISOLYSER -- HISTORICAL
 
<TABLE>
<CAPTION>
                                                                                                    THREE MONTHS
                                                        YEAR ENDED DECEMBER 31,                   ENDED MARCH 31,
                                         -----------------------------------------------------  --------------------
                                           1991       1992       1993       1994       1995       1995       1996
                                         ---------  ---------  ---------  ---------  ---------  ---------  ---------
                                                            (IN THOUSANDS, EXCEPT PER SHARE DATA)
<S>                                      <C>        <C>        <C>        <C>        <C>        <C>        <C>
STATEMENT OF OPERATIONS DATA:
  Net sales............................  $   2,587  $   5,502  $  11,831  $  46,625  $  75,414  $  12,155  $  31,008
  Gross profit.........................      1,264      3,001      4,860     11,508     16,138      2,625      7,128
  Income (loss) from operations........         88        513        261     (2,329)    (5,523)    (1,204)      (988)
  Income (loss) before extraordinary
   item and cumulative effect of change
   in accounting principle (1).........        162        532        636     (1,919)    (2,851)      (146)      (377)
  Net income (loss)....................        266        748        636     (1,862)    (2,851)      (146)      (377)
  Income (loss) per common and common
   equivalent share:
    Income (loss) before extraordinary
     item and cumulative effect of
     change in accounting principle....       0.01       0.04       0.04      (0.11)     (0.11)     (0.01)     (0.01)
    Net income (loss)..................       0.02       0.06       0.04      (0.10)     (0.11)     (0.01)     (0.01)
  Weighted average number of common and
   common equivalent shares
   outstanding.........................     12,162     13,486     16,053     18,684     25,575     24,468     30,500
BALANCE SHEET DATA:
  Working capital......................  $   4,935  $   6,656  $  24,461  $  80,743  $  90,766  $  79,613  $  88,634
  Total assets.........................      5,263      8,058     47,911    105,985    208,712    116,447    208,155
  Long-term debt.......................                                       6,732      9,821     16,481      9,899
  Redeemable common stock..............                           26,150      1,717
  Total shareholders' equity...........      5,047      7,419     11,281     90,779    174,179     92,073    174,407
</TABLE>
 
- ------------------------
(1)   Isolyser  recognized  extraordinary  benefits   from  net  operating  loss
    carryforwards of $104,000 and $216,000  in 1991 and 1992, respectively,  and
    recognized  a $57,000 cumulative effect benefit in 1994 from the adoption on
    January 1, 1994 of Statement of Financial Accounting Standards ("SFAS")  No.
    115, "Accounting for Certain Investments in Debt and Equity Securities".
 
                                       11
<PAGE>
                             MICROTEK -- HISTORICAL
 
<TABLE>
<CAPTION>
                                                                                                THREE        THREE
                                                                                               MONTHS       MONTHS
                                                                                                ENDED        ENDED
                                                     YEAR ENDED NOVEMBER 30,                  FEBRUARY     FEBRUARY
                                      -----------------------------------------------------      28,          29,
                                        1991       1992       1993       1994       1995        1995         1996
                                      ---------  ---------  ---------  ---------  ---------  -----------  -----------
                                                           (IN THOUSANDS, EXCEPT PER SHARE DATA)
<S>                                   <C>        <C>        <C>        <C>        <C>        <C>          <C>
STATEMENT OF OPERATIONS DATA:
  Net sales.........................  $  20,416  $  25,753  $  26,939  $  26,894  $  30,059   $   7,107    $   9,067
  Gross profit......................     10,398     13,442     13,072     11,947     13,783       2,877        4,352
  Income from operations............      1,171      3,705      2,108      1,402      4,385         677        1,587
  Income (loss) before extraordinary
   items and cumulative effect of
   change in accounting principle
   (1)..............................       (654)     1,287      1,007        585      2,308         337          730
  Net income (loss).................     (1,472)       775      1,031        580      2,308         337          730
  Income (loss) per common and
   common equivalent share:
    Income (loss) before
     extraordinary item and
     cumulative effect of change in
     accounting principle...........      (0.46)      0.28       0.20       0.11       0.47        0.07         0.15
    Net income (loss)...............      (0.87)      0.15       0.20       0.11       0.47        0.07         0.15
  Weighted average number of common
   and common equivalent shares
   outstanding......................      2,016      3,827      5,059      5,058      4,927       5,036        4,991
 
BALANCE SHEET DATA:
  Working capital...................  $   4,335  $   7,829  $  10,784  $   7,784  $  10,283   $   7,695    $  12,905
  Total assets......................     22,634     23,114     27,084     26,988     45,227      26,581       46,659
  Long-term debt....................     14,044      2,958      4,436         47     16,591          62       18,209
  Redeemable preferred stock........      2,279
  Total stockholders' equity........      2,580     17,749     19,117     19,883     21,119      20,220       21,862
</TABLE>
 
- ------------------------
(1) Microtek  recognized  extraordinary  charges from  the  early  retirement of
    long-term debt of $817,000 and $741,000  in 1991 and 1992 respectively,  and
    extraordinary benefits from net operating loss carryforwards of $229,000 and
    $24,000  in  1992  and  1993,  respectively.  Microtek  recognized  a $5,000
    cumulative effect charge in  1994 from the adoption  on December 1, 1993  of
    SFAS No. 109, "Accounting for Income Taxes".
 
                                       12
<PAGE>
                  ISOLYSER/MICROTEK -- PRO FORMA COMBINED (1)
 
<TABLE>
<CAPTION>
                                                                  YEAR ENDED DECEMBER 31,         THREE MONTHS
                                                             ---------------------------------  ENDED MARCH 31,
                                                               1993       1994        1995            1996
                                                             ---------  ---------  -----------  ----------------
                                                                    (IN THOUSANDS, EXCEPT PER SHARE DATA)
<S>                                                          <C>        <C>        <C>          <C>
STATEMENT OF OPERATIONS DATA:
  Net sales................................................  $  38,769  $  73,383  $   151,744    $     41,053
  Gross profit.............................................     17,932     23,455       45,398          12,156
  Income (loss) from operations............................      2,369       (927)         942             567
  Income (loss) before extraordinary item and cumulative
   effect of change in accounting principle................      1,643       (720)      (1,179)            353
  Income (loss) before extraordinary item and cumulative
   effect of change in accounting principle per common and
   common equivalent share.................................       0.07      (0.03)       (0.03)           0.01
  Weighted average number of common and common equivalent
   shares outstanding......................................     24,400     27,030       34,014          38,735
BALANCE SHEET DATA:
  Working capital..........................................                                       $     99,552
  Total assets.............................................                                            260,703
  Long-term debt...........................................                                             33,858
  Total shareholders' equity...............................                                            193,272
</TABLE>
 
- ------------------------
(1)  The selected unaudited  pro forma combined  financial statement information
    gives effect to  the Merger of  Isolyser and Microtek  under the pooling  of
    interests  method of accounting.  The selected unaudited  pro forma combined
    statement of operations  information for  the year ended  December 31,  1995
    also  gives effect to  Isolyser's acquisitions of SafeWaste  on May 31, 1995
    and White Knight effective September  1, 1995 and Microtek's acquisition  of
    Medi-Plast  on November 30, 1995  and Venodyne on April  27, 1996 as if such
    acquisitions had  occurred at  the beginning  of Isolyser's  and  Microtek's
    fiscal  years, January 1,  1995 and December 1,  1994, respectively. For the
    three-months  ended  March  31,  1996,  the  selected  unaudited  pro  forma
    statement   of  operations  information  also  gives  effect  to  Microtek's
    acquisition of Venodyne as if such  acquisition had occurred at December  1,
    1994. The selected unaudited pro forma combined balance sheet information as
    of March 31, 1996 also gives effect to Microtek's acquisition of Venodyne on
    April 27, 1996 as if such acquisition had occurred on February 29, 1996. For
    purposes  of this selected unaudited  pro forma combined financial statement
    information, the  balance  sheet  and statement  of  operations  information
    combine  Microtek's balance sheet as of February 29, 1996 and its statements
    of operations for the years ended November 30, 1993, 1994 and 1995, and  the
    three  month  period ended  February 29,  1996, respectively,  as Microtek's
    fiscal year ends on November 30.
 
   Pro forma per share amounts are based on the Exchange Ratio of 1.65 shares of
    Isolyser Common Stock for each share of Microtek Common Stock. The  selected
    unaudited  combined  balance  sheet  information  reflects  estimated Merger
    expenses of $2,750,000.  These expenses include  investment banking,  legal,
    accounting  and  miscellaneous  transaction  costs of  the  Merger,  and are
    excluded from  the  pro  forma  statements  of  operations.  Plans  for  the
    integration  and consolidation  of the  companies' operations  are currently
    being developed,  but  associated costs  are  not presently  estimable.  The
    accounting  policies utilized by  Isolyser and Microtek  are currently being
    studied from a conformity perspective; however, the impact of any  potential
    adjustment is not presently expected to be material.
 
                                       13
<PAGE>
                           COMPARATIVE PER SHARE DATA
 
    The  following table  sets forth  certain per  common share  information for
Isolyser and Microtek on  both historical and pro  forma combined bases.  Income
(loss)  per common share  information represents income  (loss) per common share
before extraordinary items and  the cumulative effect  of changes in  accounting
principles.  Pro forma combined income (loss) per  share is derived from the pro
forma combined  financial information  presented elsewhere  herein, which  gives
effect  to the Merger under the pooling  of interests method of accounting as if
the Merger had occurred at the beginning of the earliest year presented. For the
year ended December 31, 1995, pro forma combined income (loss) per common  share
also  gives effect to Isolyser's  acquisitions of SafeWaste on  May 31, 1995 and
White  Knight  effective  September  1,  1995  and  Microtek's  acquisitions  of
Medi-Plast  on November  30, 1995, and  Venodyne on  April 27, 1996,  as if such
acquisitions had occurred at  the beginning of  Isolyer's and Microtek's  fiscal
years,  January 1, 1995 and December 1, 1994, respectively. For the three-months
ended March  31, 1996  pro forma  combined  income (loss)  per common  share  of
Isolyser and Microtek, respectively, also gives effect to Microtek's acquisition
of Venodyne as if such acquisition had occurred at December 1, 1994.
 
    Historical  book value per common  share as of the end  of each year and the
three-month period presented  is computed by  dividing historical  shareholders'
equity  by the  number of common  shares outstanding  at the end  of each period
presented. Pro forma combined book value per common share as of March 31,  1996,
is computed by dividing pro forma combined shareholders' equity on such dates by
the  corresponding number of shares of Isolyser Common Stock outstanding on such
dates, adjusted for  the shares of  Isolyser Common  Stock to be  issued in  the
Merger.
 
    The  equivalent pro  forma combined  per share  information for  Microtek is
determined by multiplying the Isolyser pro forma combined per share  information
by  the Exchange Ratio of 1.65 shares of Isolyser Common Stock for each share of
Microtek Common Stock.
 
<TABLE>
<CAPTION>
                                                                                           PER SHARE OF COMMON STOCK
                                                                                       ---------------------------------
                                                                                        INCOME       CASH        BOOK
                                                                                        (LOSS)     DIVIDEND      VALUE
                                                                                       ---------  -----------  ---------
<S>                                                                                    <C>        <C>          <C>
Isolyser -- Historical
  Year Ended December 31:
    1993.............................................................................  $    0.04   $  --       $    0.82
    1994.............................................................................      (0.11)     --            3.78
    1995.............................................................................      (0.11)     --            5.72
    Three-months ended March 31, 1996................................................      (0.01)     --            5.70
Isolyser -- Pro Forma Combined
  Year Ended December 31:
    1993.............................................................................  $    0.07   $  --       $  --
    1994.............................................................................      (0.03)     --          --
    1995.............................................................................      (0.03)     --          --
    Three-months ended March 31, 1996................................................       0.01      --            5.07
Microtek -- Historical
  Year Ended November 30:
    1993.............................................................................  $    0.20   $  --       $    4.06
    1994.............................................................................       0.11      --            4.17
    1995.............................................................................       0.47      --            4.60
    Three-months ended February 29, 1996.............................................       0.15      --            4.76
Microtek -- Equivalent Pro Forma Combined
  Year Ended December 31:
    1993.............................................................................  $    0.12   $  --       $  --
    1994.............................................................................      (0.05)     --          --
    1995.............................................................................      (0.05)     --          --
    Three-months ended February 29, 1996.............................................       0.02      --            8.36
</TABLE>
 
                                       14
<PAGE>
                         COMPARATIVE MARKET PRICE DATA
 
    The Isolyser  Common Stock  and the  Microtek Common  Stock are  traded  and
quoted  on  Nasdaq.  The  table  below sets  forth,  for  the  calendar quarters
indicated, the reported high  and low sale prices  of the Isolyser Common  Stock
and  of the Microtek  Common Stock as reported  on Nasdaq, which  in the case of
Isolyser Common Stock is  for the period since  the Isolyser Common Stock  began
trading publicly on October 21, 1994. Neither Isolyser nor Microtek has declared
or  paid any cash dividends  on their respective Common  Stock. Each of Isolyser
and Microtek currently  intends to  retain any  future earnings  to finance  the
growth  and development of its business and therefore does not anticipate paying
any cash dividends in the foreseeable  future. In addition, the credit  facility
maintained by each of Isolyser and Microtek prohibits the declaration or payment
of cash dividends without the prior written consent of their respective lenders.
 
<TABLE>
<CAPTION>
                                                          ISOLYSER              MICROTEK
                                                      COMMON STOCK (1)        COMMON STOCK
                                                    --------------------  --------------------
CALENDAR YEAR                                         HIGH        LOW       HIGH        LOW
- --------------------------------------------------  ---------  ---------  ---------  ---------
<S>                                                 <C>        <C>        <C>        <C>
1994
First Quarter.....................................     --         --      $    6.50  $    5.25
Second Quarter....................................     --         --           6.50       5.50
Third Quarter.....................................     --         --           7.75       5.50
Fourth Quarter....................................  $   12.00  $    6.44       7.00       4.13
 
1995
First Quarter.....................................       9.63       8.13       6.00       4.25
Second Quarter....................................      17.88       8.38       5.88       4.50
Third Quarter.....................................      21.06      15.38       7.50       5.50
Fourth Quarter....................................      23.00      10.00       9.25       5.75
 
1996
First Quarter.....................................      18.25      11.50      16.00       8.50
Second Quarter....................................      21.00      10.50      18.00      11.25
Third Quarter (through July 29, 1996).............      12.88       8.63      15.38       9.38
</TABLE>
 
- ------------------------
(1) On September 1, 1995, Isolyser declared a two-for-one stock split. The stock
    split  was effected in the form of a  share dividend paid on October 2, 1995
    to Isolyser shareholders of record on  September 15, 1995. The high and  low
    prices  per share of Isolyser common  stock have been retroactively adjusted
    to reflect the stock split.
 
    On  March  15,  1996,  the  last  full  trading  day  prior  to  the  public
announcement  of the  execution and delivery  of the Merger  Agreement, the last
reported sale price of the Isolyser Common Stock on Nasdaq was $16.88 per  share
and  the last  reported sale price  of the  Microtek Common Stock  on Nasdaq was
$11.25 per share.
 
    On July 29, 1996, the most recent practicable date prior to the date of this
Joint Proxy Statement/ Prospectus, the last reported sale price of the  Isolyser
Common  Stock on Nasdaq was $9.38 per share  and the last reported sale price of
the Microtek Common Stock on Nasdaq was $12.75 per share.
 
    Because the market price of Isolyser Common Stock may fluctuate, the  market
value  of the shares  of Isolyser Common  Stock that holders  of Microtek Common
Stock will  receive in  the Merger  cannot  be determined  until the  Merger  is
consummated. Microtek stockholders are urged to obtain current market quotations
for  the Isolyser Common Stock and the Microtek Common Stock. See "The Merger --
General."
 
                                       15
<PAGE>
                                  THE MEETINGS
 
ISOLYSER MEETING
 
    This  Joint  Proxy  Statement/Prospectus  is  furnished  to  shareholders of
Isolyser in  connection  with the  solicitation  of  proxies on  behalf  of  the
Isolyser Board of Directors for use at the Isolyser Meeting to be held on August
30, 1996. Proxies in the form enclosed will be voted at the Isolyser Meeting, if
properly  executed, returned to Isolyser prior to the meeting and not revoked. A
proxy may be revoked at any time before it is voted by giving written notice  to
the  secretary  of Isolyser.  The  approximate date  on  which this  Joint Proxy
Statement/Prospectus and the enclosed proxy card will be first sent to  Isolyser
shareholders is August 1, 1996.
 
    OUTSTANDING   CAPITAL  SHARES  AND  RECORD  DATE.     The  record  date  for
shareholders of Isolyser  entitled to vote  at the Isolyser  Meeting is July  8,
1996.  At the  close of business  on that  day, there were  31,072,545 shares of
Isolyser Common Stock outstanding and entitled to vote at the Isolyser Meeting.
 
    QUORUM AND VOTING.  The presence, in person or by proxy, of the holders of a
majority of the  outstanding shares  of Isolyser  Common Stock  is necessary  to
constitute  a quorum  at the  meeting. In  deciding all  questions, a  holder of
Isolyser Common Stock is entitled to one  vote, in person or by proxy, for  each
share held in his or her name on the record date. Abstentions will be treated as
Isolyser  Common Stock present and entitled  to vote for purposes of determining
the presence of a quorum. The affirmative  vote of the holders of a majority  of
the  shares of Isolyser Common Stock voting  at the Isolyser Meeting is required
to approve the Merger Proposal. Abstentions  and Broker Non-Votes, if any,  will
not  be included in vote totals and, as  such, will have no effect on the Merger
Proposal. The  affirmative vote  of the  holders  of a  majority of  the  shares
represented  at the Isolyser  Meeting will be  required for the  approval of the
Isolyser Option Proposal  and any other  proposals submitted for  a vote at  the
Isolyser  Meeting.  As  of  July  8,  1996,  Isolyser's  executive  officers and
directors had the  right to vote  an aggregate of  6,092,764 shares of  Isolyser
Common  Stock, representing approximately  20% of the  shares of Isolyser Common
Stock then  outstanding. Of  these  shares, Messrs.  Taylor and  Honeycutt  have
granted Microtek an irrevocable proxy to vote all of their Isolyser Common Stock
in  favor of the Merger Proposal representing approximately 19% of the shares of
Isolyser Common Stock outstanding on the record date.
 
    ACTION TO BE TAKEN  AT THE ISOLYSER  MEETING.  At  the Isolyser Meeting  the
shareholder of Isolyser will be asked to consider and vote upon (i) the proposal
to  approve the issuance of  up to 8,758,720 shares  of Isolyser Common Stock in
connection with the Merger (i.e., the Merger Proposal), and (ii) the proposal to
increase, contingent upon consummation of  the transactions contemplated by  the
Merger  Agreement, the number  of shares of Isolyser  Common Stock issuable upon
exercise of stock options under the Plan from 3,600,000 to 4,400,000 shares  and
to  make certain  technical amendments  to the  Plan (i.e.,  the Isolyser Option
Proposal). The accompanying proxy, unless the shareholder otherwise specifies in
the proxy,  will be  voted for  the  Merger Proposal,  for the  Isolyser  Option
Proposal  and at the discretion of the proxy holder on any other matter that may
properly come before the meeting or any adjournment thereof. Where  shareholders
have appropriately specified how the proxies are to be voted, they will be voted
accordingly.  If any other matter of business is brought before the meeting, the
proxy holders  may  vote the  proxies  at  their discretion.  The  directors  of
Isolyser do not know of any such other matter of business.
 
MICROTEK MEETING
 
    This  Joint  Proxy  Statement/Prospectus  is  furnished  to  stockholders of
Microtek in  connection  with the  solicitation  of  proxies on  behalf  of  the
Microtek Board of Directors for use at the Microtek Meeting to be held on August
30, 1996. Proxies in the form enclosed will be voted at the Microtek Meeting, if
properly  executed, returned to Microtek prior to the meeting and not revoked. A
proxy may be revoked at any time before it is voted by giving written notice  to
the  Secretary  of Microtek.  The  approximate date  on  which this  Joint Proxy
Statement/Prospectus and the enclosed proxy card will first be sent to  Microtek
stockholders is August 1, 1996.
 
                                       16
<PAGE>
    OUTSTANDING CAPITAL STOCK AND RECORD DATE.  The record date for stockholders
of  Microtek entitled to  vote at the Microtek  Meeting is July  8, 1996. At the
close of business on  that day, there were  4,680,585 shares of Microtek  Common
Stock outstanding and entitled to vote at the Microtek Meeting.
 
    QUORUM AND VOTING.  The presence, in person or by proxy, of the holders of a
majority  of the  outstanding shares  of Microtek  Common Stock  is necessary to
constitute a  quorum at  the meeting.  In deciding  all questions,  a holder  of
Microtek  Common Stock is entitled to one vote,  in person or by proxy, for each
share held in his or her name on the record date. An abstention will be included
in vote totals and,  as such, will have  the same effect on  each proposal as  a
negative  vote. Broker non-votes,  if any, will  not be included  in vote totals
and, as  such, will  have no  effect on  any proposal.  Approval of  the  Merger
Agreement  requires the affirmative vote of holders  of a majority of the issued
and outstanding Microtek Common Stock.  Certain stockholders of Microtek who  at
the record date collectively owned approximately 46% of the outstanding Microtek
Common  Stock have granted  Isolyser an irrevocable  proxy to vote  all of their
Microtek Common Stock in favor of  the proposed Merger. The affirmative vote  of
the holders of a majority of the shares represented at the Microtek Meeting will
be  required for  the approval  of the  Microtek Option  Proposal and  all other
proposals submitted for a vote at the Microtek Meeting.
 
    ACTION TO BE TAKEN AT THE MICROTEK MEETING.  The accompanying proxy,  unless
the  stockholder otherwise specifies in the proxy, will be voted at the Microtek
Meeting (i)  for approval  of the  Merger Agreement,  (ii) for  approval of  the
Microtek Option Proposal and (iii) at the discretion of the proxy holders on any
other  matter  that may  properly  come before  the  meeting or  any adjournment
thereof. Where stockholders have appropriately  specified how their proxies  are
to  be voted, they will be voted accordingly. If any other matter of business is
brought before the  meeting, the  proxy holders may  vote the  proxies at  their
discretion.  The directors of Microtek  do not know of  any such other matter of
business. A  representative of  KPMG Peat  Marwick LLP,  Microtek's  independent
auditors, is expected to be present at the Special Meeting and will be available
to answer questions.
 
SOLICITATION OF PROXIES
 
    Isolyser  and Microtek  will each bear  the cost of  solicitation of proxies
from their respective stockholders. In  addition to soliciting proxies by  mail,
directors,  officers and employees  of Isolyser and  Microtek, without receiving
additional compensation  therefor, may  solicit proxies  by personal  interview,
telephone  and telegram. Arrangements have also been made with brokerage houses,
banks and  other custodians,  nominees  and fiduciaries  for the  forwarding  of
soliciting  material to the  beneficial owners of the  shares of Isolyser Common
Stock and Microtek Common Stock held of record by such persons, and Isolyser and
Microtek will respectively reimburse them for reasonable out-of-pocket  expenses
incurred by them in connection therewith.
 
                                   THE MERGER
 
GENERAL
 
    The  terms  and  conditions  of  the Merger  are  set  forth  in  the Merger
Agreement,   the   text   of   which   is   attached   to   this   Joint   Proxy
Statement/Prospectus  as Annex A. The summary  of the Merger Agreement contained
in this Joint Proxy Statement/Prospectus does not purport to be complete and  is
qualified in its entirety by reference to the complete text of such document.
 
    At  the time the  Merger becomes effective, the  Isolyser Subsidiary will be
merged with and into Microtek  in accordance with Delaware  law. As a result  of
the  Merger, the separate corporate existence  of the Isolyser Subsidiary (which
was formed solely  for the purposes  of the Merger  and has not  engaged in  any
operations  or businesses) will cease, and  Microtek will continue its existence
as a wholly-owned subsidiary of Isolyser.
 
    Upon the consummation  of the Merger,  each share of  Microtek Common  Stock
outstanding  immediately prior  to the  time the  Merger becomes  effective (the
"Microtek Shares") will be  converted into the right  to receive 1.65 shares  of
Isolyser    Common    Stock    (the   "Isolyser    Shares").    Any   fractional
 
                                       17
<PAGE>
shares resulting from such conversion will  entitle the holder to receive  cash.
See  "--  No  Fractional  Shares."  The  shares  of  capital  stock  of Isolyser
outstanding immediately prior to the Merger will not be affected as a result  of
the Merger.
 
    Isolyser  will  treat the  Merger  as a  pooling-of-interests  for financial
reporting purposes. See "-- Accounting Treatment." The Merger is intended to  be
a  tax-free reorganization under the  federal income tax laws,  and, as such, no
gain or  loss will  be recognized  by the  stockholders of  Microtek upon  their
receipt  of the Isolyser Shares  in exchange for their  Microtek Shares. Gain or
loss will be recognized, however, by holders of Microtek Shares to the extent of
any cash received by the Microtek stockholders for any fractional share  amount.
See "-- Certain Federal Income Tax Consequences."
 
BACKGROUND OF THE MERGER
 
    Microtek completed an initial public offering of its Common Stock in October
1992.  During 1993, Baxter  International ("Baxter"), which  was then Microtek's
largest customer, resumed the internal manufacturing of surgical drape  products
previously  purchased  from Microtek.  Primarily  as a  result  of this  loss of
business, Microtek's net earnings per share declined from $.15 in fiscal 1992 to
$.11 in  fiscal 1994.  Microtek management  responded to  the loss  of  Baxter's
business  by  implementing  a  strategic  plan  to  reduce  operating  costs and
diversify its customer base. Nevertheless, the price of Microtek's Common  Stock
as  reported on Nasdaq dropped from a high of  $14.50 in fiscal 1992 to a low of
$4.13 in fiscal 1994.
 
    In April  1994, Microtek  engaged the  firm of  Goldman, Sachs  to  evaluate
various  strategic  alternatives  to  enhance  stockholder  value,  including  a
possible sale  of  Microtek.  During  the course  of  this  engagement,  several
companies  were  approached  by Goldman  Sachs  to determine  their  interest in
purchasing Microtek. Microtek's  management was familiar  with Isolyser and  had
previously  discussed with Isolyser management  Isolyser's potential interest in
making a strategic investment in Microtek. On this basis, Goldman Sachs included
Isolyser among  the third  parties it  contacted regarding  a proposed  sale  of
Microtek.  After several months, the Microtek Board of Directors determined that
no third party  had demonstrated  sufficient interest in  acquiring Microtek  to
merit  further  negotiations, and  on  March 3,  1995,  Microtek issued  a press
release indicating that any  discussions regarding a sale  of Microtek had  been
terminated.
 
    During  fiscal 1995,  Microtek achieved net  sales and  net income exceeding
that reported for  any year  since its initial  public offering.  Also in  1995,
Microtek  completed  several acquisitions  and  increased its  international net
sales. In April  1995, Isolyser  and Microtek entered  into a  joint venture  to
facilitate  the manufacture  in the Dominican  Republic of  certain Isolyser raw
materials into  finished  products. As  a  result  of this  joint  venture,  the
management of Isolyser and Microtek maintained contact with one another.
 
    On  February  8, 1996,  Robert  L. Taylor,  under  his general  authority as
Isolyser's Chairman and  Chief Executive Officer,  telephoned Kimber L.  Vought,
the Chief Executive Officer of Microtek, to indicate that Isolyser might have an
interest in acquiring Microtek. Mr. Vought responded by indicating that Microtek
would  not be willing to enter  into any negotiations regarding such acquisition
unless Isolyser were to provide Microtek with  a written offer at a price  level
sufficient  to warrant Microtek's hiring of  a financial advisor to evaluate the
offer. At a teleconference meeting of  the Microtek Board on February 13,  1996,
Mr.  Vought advised the directors  of the contact from  Mr. Taylor. The Microtek
Board, after discussing such matters in detail, requested further  presentations
from management regarding such a proposed transaction at its scheduled quarterly
meeting  on February 20, 1996. At the meeting on February 20, 1996, the Microtek
Board decided to permit Isolyser to clarify its interest in purchasing  Microtek
at  a sufficiently high price to  warrant allowing Isolyser due diligence access
to Microtek.
 
    In order to be responsive to  Microtek's request to provide a written  offer
at  a  specific  price level  to  acquire  Microtek, Mr.  Taylor  requested that
Microtek provide certain  non-public information  in order  that Isolyser  might
complete its evaluation of Microtek. On February 21, 1996, Microtek entered into
 
                                       18
<PAGE>
a  confidentiality agreement  with Isolyser  relating to  Microtek furnishing to
Isolyser certain  non-public information  regarding Microtek.  As part  of  that
confidentiality  agreement,  Isolyser  agreed that,  without  the  prior written
consent of Microtek, it would not, for a period of three years, seek control  of
Microtek.  On  February 29,  1996, informal  meetings  were held  among Isolyser
representatives  and   Microtek   representatives  regarding   such   non-public
information.
 
    On  March 1,  1996, Isolyser  engaged Morgan  Keegan to  serve as Isolyser's
financial advisor in connection with  the proposed acquisition of Microtek  and,
in  that capacity, to  assist Isolyser in developing  an appropriate value range
for such acquisition, negotiate  with Microtek and  its representatives and,  if
requested  by  Isolyser's Board  of  Directors, provide  its  opinion as  to the
fairness,  from  a  financial  point  of  view,  of  the  Merger  to  Isolyser's
shareholders.  On March 4, 1996, Isolyser sent  to Microtek a proposed letter of
intent to acquire the Common Stock of Microtek in a merger transaction providing
for a fixed  exchange ratio of  .965 shares  of Isolyser Common  Stock for  each
outstanding  share  of  Microtek Common  Stock.  Based on  then  current trading
prices, this ratio resulted in an acquisition consideration of $16.50 per  share
of  Microtek Common Stock. The  Microtek Board met on  March 4, 1996 to consider
the letter of intent. The Microtek Board determined that a fixed exchange  ratio
would  not be in the best interest of Microtek stockholders due to the perceived
volatility of the Isolyser  Common Stock sale price  (which on Friday, March  1,
1996  closed in Nasdaq trading  at $16.50). At such  meeting, the Microtek Board
decided to  retain  Goldman Sachs  as  its  financial advisor  to  evaluate  the
proposed  offer and  to assist  Microtek in  its due  diligence investigation of
Isolyser and  in  its negotiation  of  improved  terms for  the  proposed  fixed
exchange  ratio. Goldman Sachs thereafter contacted Isolyser's financial advisor
to discuss certain adjustments to the exchange ratio and a termination right  in
favor of Microtek in the event that the Isolyser Common Stock price traded below
a  specified  level.  Goldman  Sachs and  Microtek  management  reported  to the
Microtek Board  the proposed  resolution  of these  issues at  a  teleconference
meeting on March 8, 1996. Based upon the proposed resolution, Microtek furnished
to Isolyser a proposed draft of the Merger Agreement on March 10, 1996. Also, on
March  8,  1996, Microtek  executed  a confidentiality  agreement  with Isolyser
(substantially identical  to the  agreement  executed by  Isolyser in  favor  of
Microtek)  relating  to  Isolyser  furnishing  to  Microtek  certain  non-public
information and  Microtek  requested certain  non-public  information  regarding
Isolyser.
 
    During  the  week  of March  11,  representatives of  Isolyser  and Microtek
negotiated the terms  of the Merger  Agreement, subject to  the approval of  the
Boards of Directors of Isolyser and Microtek. During the week of March 11, 1996,
Isolyser's   legal  counsel,  financial  advisors  and  independent  accountants
conducted various limited due diligence investigations of Microtek. At a meeting
on March  12,  1996, Isolyser  representatives  gave a  detailed  due  diligence
presentation  to  the  Microtek Board.  The  respective Boards  of  Directors of
Isolyser and Microtek,  together with  their respective  financial advisors  and
legal  counsel, met on Friday,  March 15, 1996, to  consider the proposed Merger
and Merger  Agreement,  at  which  time the  Boards  of  Isolyser  and  Microtek
respectively  authorized  their execution  and delivery  of the  Original Merger
Agreement. After the close of the market on Friday, March 15, 1996, the Original
Merger  Agreement  was  executed  by   Microtek  and  Isolyser,  and  a   public
announcement  of the Original Merger Agreement  and the proposed Merger was made
before the commencement  of trading on  Monday, March 18,  1996. As executed  on
March  15, 1996,  the Original Merger  Agreement provided that  (i) the Exchange
Ratio would  be equal  to $16.50  divided by  an average  of closing  prices  of
Isolyser Common Stock on Nasdaq over a specified time period (the "Determination
Price),  (ii)  if the  average  closing price  was  below $14.50  (the "Collar's
Floor"), the  Determination Price  would nevertheless  be $14.50,  (iii) if  the
average   closing  price  was   above  $18.50  (the   "Collar's  Ceiling"),  the
Determination Price would nevertheless be  $18.50 and (iv) Microtek could  elect
to  terminate the  Original Merger  Agreement if  the average  closing price was
below $13.00 (the "Termination Price"), with  the average closing price in  each
case being calculated based upon the average closing price per share of Isolyser
Common  Stock  as  reported  on  Nasdaq over  the  20  trading  days immediately
preceding the second trading day prior to the Effective Date.
 
                                       19
<PAGE>
    Following the  execution  and delivery  of  the Original  Merger  Agreement,
Isolyser  filed  with  the  Commission  a  registration  statement  on  Form S-4
containing a  proxy  statement/  prospectus  for  use  in  connection  with  the
transactions  contemplated by  the Original Merger  Agreement. That registration
statement was declared effective by the Commission on May 24, 1996 and the proxy
statement/ prospectus included therein was  mailed to the Microtek  stockholders
on  May 28, 1996 for a proposed meeting of the Microtek stockholders on June 28,
1996. The parties therefore anticipated that the average closing price would  be
calculated  based on the closing sale prices  of Isolyser Common Stock on Nasdaq
for those trading days beginning May 29, 1996 and ending June 25, 1996.
 
    The average  closing price  of Isolyser  Common Stock  on Nasdaq  for  those
trading  days from May  29, 1996 through June  25, 1996 was  $12.29, with a high
closing price on May 30, 1996 of $13.88 and a low closing price on June 21, 1996
of $11.00. In recognition of the  possibility that the average closing price  of
Isolyser  Common Stock could  fall below $13.00 per  share, Mr. Vought contacted
Mr. Taylor on June 6, 1996 to advise Mr. Taylor of Microtek's continuing support
of the Merger  and Microtek's  objective to reduce  the Collar's  Floor and  the
Termination  Price. Mr. Taylor confirmed to Mr. Vought Isolyser's support of the
Merger, and  referred  any  discussions  relative  to  the  Exchange  Ratio  and
Termination  Price to Morgan Keegan as  Isolyser's financial advisor. During the
week of  June  10, 1996,  the  respective  financial advisors  of  Isolyser  and
Microtek  discussed  possible  modifications  of  the  Collar's  Floor, Collar's
Ceiling and the Termination  Price. After consideration  of the Isolyser  Common
Stock  trading prices during the week of  June 10, 1996, the parties' respective
counsel was  requested to  prepare draft  modifications to  the Original  Merger
Agreement  for  consideration  by  the  parties,  and  the  parties'  respective
financial advisors  were  requested to  analyze  proposed modifications  to  the
Exchange  Ratio from a financial point of view to respectively advise the Boards
of Isolyser  and Microtek  on such  modifications. The  Boards of  Isolyser  and
Microtek,  together with their respective  financial advisors and legal counsel,
separately met on Friday, June 21, 1996 and Sunday, June 23, 1996, respectively,
to consider the proposed amendments to  the Original Merger Agreement, at  which
time the Boards of Isolyser and Microtek respectively authorized their execution
and  delivery  of an  amendment  to the  Original  Merger Agreement  (the "First
Amended Merger  Agreement"). Following  the Board  meetings, the  First  Amended
Merger   Agreement  was  executed  by  Microtek   and  Isolyser,  and  a  public
announcement thereof was made  on Monday, June 24,  1996, before the opening  of
the Nasdaq market trading.
 
   
    As  executed  on  June  23,  1996, the  First  Amended  Merger  Agreement in
pertinent part provided for  (i) a Collar's Ceiling  of $15.00, (ii) a  Collar's
Floor  of  $10.00,  and  (iii)  a Termination  Price  of  $10.00.  Following the
execution and delivery  of the  First Amended Merger  Agreement, Isolyser  filed
with  the Commission a new registration statement on Form S-4 containing a joint
proxy  statement/prospectus  for  use   in  connection  with  the   transactions
contemplated  by  the First  Amended Merger  Agreement. The  parties anticipated
mailing the joint proxy statement/prospectus during  late July for a meeting  in
late August. During the first three weeks of July, the closing price of Isolyser
Common Stock on Nasdaq ranged from $8.88 to $12.50.
    
 
    Following Isolyser's announcement on July 24, 1996, of its operating results
for the three-month and six-month periods ended June 30, 1996, the closing price
of  the Isolyser Common Stock fell from $9.50  on July 23, 1996 to $8.88 on July
24, 1996. On July  25, 1996, Mr.  Taylor and Mr.  Vought discussed by  telephone
proposed modifications of the First Amended Merger Agreement to fix the Exchange
Ratio  at an unspecified amount  and delete the provisions  of the First Amended
Merger Agreement permitting either Isolyser  or Microtek to terminate the  First
Amended  Merger Agreement  if the average  closing price of  the Isolyser Common
Stock as reported by Nasdaq for the 20 trading days preceding the fifth  trading
day  prior to the Effective  Date was less than  $10.00. The parties' respective
counsel was requested to prepare draft modifications of the First Amended Merger
Agreement  for  consideration  by  the  parties,  and  the  parties'  respective
financial  advisors were requested to analyze  the proposed modifications to the
Exchange Ratio from a financial point of view to respectively advise the  Boards
of  Isolyser  and Microtek  on such  modifications. The  Boards of  Isolyser and
Microtek, together with their financial  advisors and legal counsel,  separately
met on Monday, July 29,
 
                                       20
<PAGE>
1996, to consider the proposed amendments to the First Amended Merger Agreement,
at  which time the Boards of Isolyser and Microtek respectively authorized their
execution and delivery of  the Merger Agreement.  Following the Board  meetings,
the  Merger  Agreement  was executed  by  Microtek  and Isolyser,  and  a public
announcement thereof was made  on Tuesday, July 30,  1996 before the opening  of
the Nasdaq market trading.
 
ISOLYSER'S REASONS FOR THE MERGER
 
    In  approving  the  Original  Merger  Agreement,  the  First  Amended Merger
Agreement and the Merger Agreement, the Isolyser Board considered the  following
business  issues which had been  the subject of negotiations  during the week of
March 11, 1996, June 11 to June 21, 1996 and the days preceding the execution of
the Merger Agreement: (i) the  method of establishing the consideration  payable
in  respect of  the Merger  and the  historical trading  prices of  Isolyser and
Microtek Common  Stock; (ii)  the amount  of debt  payable by  Microtek and  the
potential increase in such debt to the extent permitted by the Merger Agreement;
(iii)  the accounting  treatment for  the transaction  and estimated transaction
costs; (iv)  the various  representations  and warranties  of Microtek  and  the
disclosures of Microtek contained in the Merger Agreement and related disclosure
schedules;  (v) the  covenants of  Isolyser, including,  without limitation, the
indemnification provisions contained  in the Merger  Agreement to indemnify  the
directors  and officers  of Microtek  and restrictions  on the  number of shares
issuable by  Isolyser  without the  consent  of Microtek;  (vi)  the  respective
termination  rights contained in  the Merger Agreement;  (vii) the provisions in
the Merger Agreement limiting Microtek's Board in negotiating with third parties
in  the  event  of  an  unsolicited  Acquisition  Proposal  and  the  contingent
obligation  of Microtek to pay Isolyser $2.5 million under certain circumstances
related to  such  an  Acquisition  Proposal;  and  (viii)  the  absence  of  any
indemnification provisions by the shareholders of Microtek in favor of Isolyser.
After  consideration of these  and other issues,  the Isolyser Board unanimously
determined at its special  meetings held on  March 15, 1996,  June 21, 1996  and
July  29, 1996, that the Merger and the Merger Agreement (or the Original Merger
Agreement and First Amended Merger  Agreement, as the case  may be) were in  the
best  interests of Isolyser and Isolyser's shareholders and, therefore, approved
the Merger Agreement. At its special meetings held on June 21, 1996 and July 29,
1996, the  Isolyser Board  further unanimously  determined to  recommend to  the
Isolyser shareholders that they approve the Merger Proposal.
 
    Isolyser  considered a number of factors  in the course of its deliberations
at its Board meetings held on March 15,  1996, June 21, 1996 and July 29,  1996,
but  did not assign any relative or specific weight to the factors considered or
give prominence to any specific factor or  group of factors. In addition to  the
business  issues  described in  the  preceding paragraph,  the  material factors
considered were  as  follows:  (i)  the  conversion  expertise  of  Microtek  in
manufacturing  its infection and fluid control products, and related benefits to
Isolyser in Isolyser's growth strategy to vertically integrate its  capabilities
in  manufacturing OREX-Registered Trademark-  Degradables-TM-; (ii) the relative
market position of  Microtek as  a low cost  manufacturer and  supplier of  film
products  used in the health care marketplace; (iii) the expertise of Microtek's
personnel in selling and marketing its products in the health care  marketplace;
(iv)  the gross margins  enjoyed by Microtek  on its products  and the volume of
such products which  might be included  in Isolyser's procedure  trays; (v)  the
international  sales generated by Microtek and potential improved access to such
international markets  which could  be  afforded Isolyser  as  a result  of  the
Merger;  (vi) the  complementary nature  of Microtek's  management to Isolyser's
management; (vii)  Microtek's sales  increased  12% in  1995 over  1994;  (viii)
Microtek's  operating income  increased 213%  in 1995  over 1994;  (ix) Microtek
would be expected to contribute  positively to Isolyser's net operating  results
following consummation of the Merger; (x) the stockholders and option holders of
Microtek  would hold up  to approximately 26%  of the shares  of common stock of
Isolyser outstanding immediately following the  Merger assuming the exercise  of
all  outstanding options to  purchase shares of Isolyser  Common Stock; (xi) the
historical trading price of  Microtek's and Isolyser's  Common Stock; and  (xii)
the presentation of Isolyser's financial advisor, Morgan Keegan, and its written
opinion  (summarized below under  "-- Opinion of  Isolyser's Financial Advisor")
delivered in  connection with  Isolyser's Board  approval of  the First  Amended
Merger Agreement and verbally confirmed
 
                                       21
<PAGE>
in  connection with the Board's  approval of the Merger  Agreement to the effect
that, subject to the assumptions made,  matters considered and limits of  review
as  set forth in such opinion, the number of Isolyser shares to be issued in the
Merger was fair to the shareholders of Isolyser from a financial point of view.
 
    The Isolyser Board of Directors believes that each of these factors supports
its recommendation that the Isolyser shareholders authorize consummation of  the
Merger by approving the Merger Proposal.
 
MICROTEK'S REASONS FOR THE MERGER
 
    At  meetings held on  March 15, 1996, June  23, 1996 and  July 29, 1996, the
Microtek Board discussed with Goldman Sachs and reviewed with legal counsel  the
terms  of the Original Merger Agreement,  the First Amended Merger Agreement and
the Merger Agreement, respectively,  including the representations,  warranties,
covenants  and closing conditions contained therein. At the meeting of the Board
held on March 15, 1996, Goldman Sachs made a presentation to the Microtek  Board
and  delivered  its opinion  that,  as of  March  15, 1996,  the  exchange ratio
pursuant to the Original Merger Agreement was fair to the holders of the  shares
of  Microtek Common Stock.  At the meeting of  the Board held  on June 23, 1996,
Goldman Sachs  made a  presentation  to the  Microtek  Board and  delivered  its
opinion  that, as  of June 23,  1996, the  exchange ratio pursuant  to the First
Amended Merger  Agreement was  fair to  the holders  of the  shares of  Microtek
Common  Stock. At the meeting of the Board  held on July 29, 1996, Goldman Sachs
made a presentation to the Microtek Board and delivered its opinion that, as  of
July  29, 1996, the Exchange Ratio pursuant  to the Merger Agreement was fair to
the holders of the shares of Microtek Common Stock.
 
    At the  March 15,  1996,  June 23,  1996 and  July  29, 1996  meetings,  the
Microtek  Board unanimously determined that the  Merger was advisable and in the
best interests  of  Microtek  stockholders  and  approved  the  Original  Merger
Agreement,   the   First  Amended   Merger   Agreement  and   Merger  Agreement,
respectively.
 
    In reaching  its  conclusion to  enter  into  the Merger  Agreement  and  to
recommend  adoption of  the Merger Agreement  by the  Microtek stockholders, the
Microtek Board considered the following factors:
 
        (i) An assessment of  Microtek's strategic alternatives, which  included
    remaining a publicly owned independent company. In this regard, the Microtek
    Board  of Directors  concluded, following extensive  analysis and discussion
    with its legal  and financial  advisors and  among the  directors, that  the
    terms  of  the  Merger Agreement  provided  the  best means  for  holders of
    Microtek Common Stock to maximize the value of their holdings;
 
        (ii) The belief that the Merger will result in a strong combined  entity
    with complementary businesses, corporate goals and management philosophies;
 
       (iii)  Information relating  to the financial  performance, prospects and
    business operations  of each  of Microtek  and Isolyser  (which  information
    included  the  historical financial  information  contained in  the periodic
    public reports of Microtek and Isolyser and the descriptions of their  lines
    of business contained in such reports);
 
       (iv)  The terms  and conditions  of the  Merger Agreement,  including the
    right of Microtek to negotiate with and provide information to third parties
    and  terminate  the  Merger  Agreement  in  the  event  of  an   unsolicited
    Acquisition  Proposal, if  such action  is required  in the  exercise of the
    fiduciary duties  of  the Microtek  Board  of Directors  (if  the  foregoing
    termination  provision  is exercised,  Microtek  would be  obligated  to pay
    Isolyser $2.5 million (see " -- Fees and Expenses") which the Microtek Board
    of Directors did not  view as unreasonably precluding  any third party  from
    proposing an alternative transaction);
 
        (v)  The presentations  of Microtek's financial  advisor, Goldman Sachs,
    and its written  opinions to  the effect  that, as  of March  15, 1996,  the
    exchange  ratio pursuant  to the Original  Merger Agreement was  fair to the
    holders of  shares of  Microtek Common  Stock;  that as  of June  23,  1996,
 
                                       22
<PAGE>
    the  exchange ratio pursuant to the  First Amended Merger Agreement was fair
    to the holders of shares of Microtek  Common Stock; and that as of July  29,
    1996,  the Exchange Ratio pursuant  to the Merger Agreement  was fair to the
    holders of the  shares of Microtek  Common Stock (for  a summary of  Goldman
    Sachs'  written opinion dated July 29, 1996, including the assumptions made,
    matters considered  and limits  of  review, see  "-- Opinion  of  Microtek's
    Financial  Advisor"). The  full text of  the opinion of  Goldman Sachs dated
    July 29, 1996 is attached  as Annex C hereto  and is incorporated herein  by
    reference;
 
       (vi)  The trading price of the  Microtek Common Stock since completion of
    Microtek's  initial  public  offering  and  that  the  Merger  consideration
    represents  a premium of approximately 78%  over the highest price in fiscal
    1995 and approximately  59% over the  closing sale price  of $10.38 for  the
    Microtek Common Stock on Nasdaq on February 7, 1996, the day before Microtek
    became  aware  of  Isolyser's  possible interest  in  pursuing  the proposed
    Merger; and
 
       (vii)  The   prices  paid   in   other  recent   comparable   acquisition
    transactions.
 
    The Microtek Board of Directors believes that each of these factors supports
its  recommendation that the Microtek stockholders  approve and adopt the Merger
Agreement and approve the terms of the Merger.
 
    The Microtek Board believes that Microtek and the Microtek stockholders will
receive reasonable  protection  from  a  change  in  circumstances  relating  to
Isolyser  between  the  date of  the  Joint Proxy  Statement/Prospectus  and the
Effective Date through the inclusion in  the Merger Agreement of a condition  to
the  closing of the Merger to the effect that, since December 31, 1995, no event
shall have occurred which would have a material adverse effect on the  business,
operations, assets or financial condition of Isolyser or its subsidiaries, taken
as a whole.
 
    In  view of the  wide variety of  factors considered in  connection with its
evaluation of  the Merger,  the Microtek  Board  of Directors  did not  find  it
practicable  to, and did  not, quantify or otherwise  attempt to assign relative
weights to the specific  factors considered in  reaching its determination  that
the  terms of the  Merger Agreement are fair  to, and in  the best interests of,
Microtek and its stockholders.
 
    THE  MICROTEK  BOARD  OF  DIRECTORS  UNANIMOUSLY  RECOMMENDS  THAT  MICROTEK
STOCKHOLDERS VOTE TO APPROVE AND ADOPT THE MERGER AGREEMENT AND THE TRANSACTIONS
CONTEMPLATED THEREBY.
 
OPINION OF ISOLYSER'S FINANCIAL ADVISOR
 
    Morgan  Keegan was retained by  Isolyser to act as  its financial advisor in
connection with the Merger and to render an opinion to the Board of Directors of
Isolyser as to the fairness, from a financial point of view, to the shareholders
of Isolyser of the consideration to be  paid by Isolyser pursuant to the  Merger
Agreement.  Morgan  Keegan was  selected by  Isolyser  based on  Morgan Keegan's
experience, expertise and familiarity with Isolyser and its business.
 
    Morgan Keegan  is a  nationally recognized  investment banking  firm and  is
regularly  engaged in the  valuation of businesses  and securities in connection
with mergers and acquisitions, competitive biddings, secondary distributions  of
listed  and unlisted securities,  private placements and  valuations for various
purposes. Morgan Keegan has previously  rendered investment banking services  to
Isolyser,  including advising Isolyser with respect  to the acquisition of White
Knight Healthcare, Inc. in  1995, acting as  managing underwriter of  Isolyser's
initial  public offering  in 1994  and lead manager  of a  follow-on offering of
Isolyser Common Stock in  1995. On March 15,  1996, Morgan Keegan delivered  its
written  opinion dated March 15, 1996, to the Isolyser Board of Directors to the
effect that, as of that date, the consideration to be paid by Isolyser  pursuant
to  the Original Merger Agreement  was fair, from a  financial point of view, to
the   shareholders   of   Isolyser.   On   June   21,   1996,   Morgan    Keegan
 
                                       23
<PAGE>
delivered  its written opinion dated June 21, 1996, to the Isolyser Board to the
effect that, as of that date, the consideration to be paid by Isolyser  pursuant
to  the First Amended Merger Agreement was fair, from a financial point of view,
to the shareholders of Isolyser.
 
    On July 29, 1996, at a meeting  called to consider the Merger Agreement  and
the  Merger, representatives of  Morgan Keegan made an  oral presentation to the
Isolyser Board  of Directors  with respect  to various  aspects of  the  Merger,
including  the financial terms and conditions of the Merger. In addition, Morgan
Keegan orally (i) reviewed  with the Isolyser Board  its written opinion,  dated
June  21, 1996, to the Isolyser  Board to the effect that,  as of such date, the
consideration to  be paid  by  Isolyser pursuant  to  the First  Amended  Merger
Agreement (which included an Exchange Ratio of up to 1.65, which is the Exchange
Ratio  provided by  the Merger  Agreement) was fair,  from a  financial point of
view, to the shareholders of Isolyser and (ii) confirmed that the Isolyser Board
could rely upon such opinion in connection with its consideration of the  Merger
Agreement.
 
    THE  FULL TEXT OF THE JUNE 21,  1996 WRITTEN OPINION OF MORGAN KEEGAN, WHICH
SETS FORTH  THE ASSUMPTIONS  MADE, GENERAL  PROCEDURES FOLLOWED,  OTHER  MATTERS
CONSIDERED AND LIMITATIONS ON THE REVIEW UNDERTAKEN IN ARRIVING AT SUCH OPINION,
IS  ATTACHED  TO  THIS JOINT  PROXY  STATEMENT/PROSPECTUS AS  ANNEX  B. ISOLYSER
STOCKHOLDERS ARE URGED TO READ SUCH OPINION  IN ITS ENTIRETY AND THE SUMMARY  OF
SUCH  OPINION SET FORTH HEREIN IS QUALIFIED  IN ITS ENTIRETY BY REFERENCE TO THE
FULL TEXT  OF SUCH  OPINION. MORGAN  KEEGAN'S OPINION  IS DIRECTED  ONLY TO  THE
FAIRNESS,  FROM A FINANCIAL POINT  OF VIEW, TO THE  ISOLYSER SHAREHOLDERS OF THE
CONSIDERATION TO  BE PAID  BY  ISOLYSER PURSUANT  TO  THE FIRST  AMENDED  MERGER
AGREEMENT,  DOES NOT  ADDRESS ANY  OTHER ASPECT  OF THE  PROPOSED MERGER  OR ANY
RELATED TRANSACTION AND DOES NOT CONSTITUTE A RECOMMENDATION TO ANY  STOCKHOLDER
OF MICROTEK AS TO HOW SUCH STOCKHOLDER SHOULD VOTE OR OTHERWISE.
 
    In  arriving at its  opinion, Morgan Keegan reviewed  an unexecuted draft of
the First Amended Merger Agreement dated  June 20, 1996 (which, for purposes  of
its analysis, it assumed that any further revisions, including the filling in of
blank  spaces and  the attachment  of final  exhibits and  appendices, would not
materially alter  the terms  and  provisions of  such  documents and  that  such
documents would be executed as finalized); held discussions with various members
of  management  and representatives  of  Isolyser and  Microtek  concerning each
company's historical and current operations, financial condition and  prospects;
reviewed  historical consolidated financial and operating data that was publicly
available or  furnished  to  it  by Isolyser  and  Microtek;  reviewed  internal
financial  analyses,  financial  and  operating  forecasts,  reports  and  other
information prepared by officers and  representatives of Isolyser and  Microtek;
reviewed  certain publicly available  information with respect  to certain other
companies that it believed to be comparable to Microtek and the trading  markets
for  such  other  companies'  securities;  reviewed  certain  publicly available
information concerning the terms  of certain other  transactions that it  deemed
relevant  to its inquiry;  and conducted such  other financial studies, analyses
and investigations as it deemed appropriate for the purposes of its opinion.
 
    In connection with its review and  analysis and in arriving at its  opinion,
Morgan  Keegan did not assume responsibility for independent verification of any
of the information provided to or otherwise reviewed by Morgan Keegan and relied
upon its being complete and accurate in all respects. Morgan Keegan also assumed
the correctness  of  and  relied  upon the  representations  and  warranties  of
Isolyser  and Microtek contained  in the First  Amended Merger Agreement. Morgan
Keegan also  relied upon  the managements  of Isolyser  and Microtek  as to  the
reasonableness  and achievability of the financial and operating projections and
the assumptions  and bases  therefore  provided to  it,  and assumed  that  such
projections,  including without limitation, cost savings and operating synergies
from the Merger, reflected the best currently available estimates and  judgments
of  the  managements  of  Isolyser and  Microtek,  respectively,  and  that such
projections and forecasts would be realized in the amounts and time periods then
estimated by the  managements of Isolyser  and Microtek. Morgan  Keegan was  not
engaged  to assess the  achievability of such projections  or the assumptions on
which they  were  based  and  expressed  no  view  as  to  such  projections  or
assumptions.  Morgan Keegan was not  engaged to, and did  not conduct a physical
inspection or appraisal of any of the assets, properties or facilities of either
Isolyser or  Microtek,  nor  was  it  furnished  with  any  such  evaluation  or
appraisal.  Morgan Keegan assumed that the conditions to the Merger as set forth
in the First Amended Merger Agreement would
 
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<PAGE>
be satisfied; and that the Merger would be consummated on a timely basis in  the
manner  contemplated  by  the  First  Amended  Merger  Agreement  and  that,  as
contemplated by  the  First  Amended  Merger  Agreement,  the  Merger  would  be
accounted  for as a pooling of interests.  Morgan Keegan expressed no opinion as
to the price  or trading range  at which  shares of Isolyser  Common Stock  will
trade after the date of its opinion, or upon completion of the Merger.
 
    In  connection with its presentations to  the Isolyser Board of Directors on
June 21, 1996 and July 29, 1996, and in preparing its opinions for the  Isolyser
Board  of  Directors,  Morgan  Keegan  performed  a  variety  of  financial  and
comparative analyses, including those described below.
 
    CONTRIBUTION ANALYSIS.  Morgan Keegan analyzed the pro forma contribution of
each of Isolyser and Microtek to the 1995 and projected 1996 and 1997  operating
results  of  a combined  Isolyser and  Microtek.  Morgan Keegan  calculated that
Microtek would have  contributed 25.7%, 21.6%  and 16.3% to  pro forma  combined
1995,  1996 and 1997 sales;  41.6%, 33.4% and 23.0%  to pro forma combined 1995,
1996, and 1997 gross profit; 100.6%, 40.7% and 23.6% to pro forma combined 1995,
1996 and 1997 operating cash flow; 260.4%, 52.5% and 24.1% to pro forma combined
1995, 1996 and 1997 operating income; and  381.4%, 47.7% and 21.3% to pro  forma
combined  1995,  1996 and  1997 net  income. Morgan  Keegan then  calculated the
percentage ownership by Microtek shareholders  of the combined company based  on
the   1.65  Exchange  Ratio   as  21.3%  and   concluded  that  from  Isolyser's
shareholders' perspective, Microtek's  percentage contribution  to sales,  gross
profit,  operating cash  flow, operating income  and net income  of the combined
company compares favorably with the percentage ownership of the combined company
proposed as transaction consideration.
 
    COMPARABLE COMPANY ANALYSIS.   Morgan Keegan  reviewed and compared  certain
actual  and  forecasted financial,  operating  and stock  market  information of
Microtek  to  seven  publicly  traded  companies  in  the  healthcare   industry
considered  by  Morgan  Keegan to  be  comparable to  Microtek.  These companies
included Arrow International, Inc., Hosposable Products, Inc., Isolyser,  Maxxim
Medical,  Inc., Medex, Inc., Medical Action Industries, Inc., and Tecnol Medical
Products, Inc. Morgan  Keegan calculated  a range  of market  multiples for  the
comparable  companies by  dividing adjusted market  value (market capitalization
based on the closing price  per share on June 20,  1996 plus debt less cash)  by
each  such  company's  sales,  operating cash  flow,  operating  income;  and by
dividing market value by  each such company's net  income, tangible book  value,
and  projected 1996 earnings per share.  This analysis indicated that the median
multiple for sales  was .83x, for  operating cash flow  was 9.9x, for  operating
income was 15.0x, for net income was 31.8x, for tangible book value was 1.9x and
for  earnings per share was 28.9x.  This compared to corresponding multiples for
Microtek for sales  of 2.44x, for  operating cash flow  of 11.5x, for  operating
income  of 14.9x, for net income of 21.6x  and for tangible book value being not
meaningful. Morgan Keegan also calculated ranges of indicative equity values for
Microtek based upon the comparable company multiples, and for Microtek  assuming
a 30% control premium. The median indicative equity values were $14.5 million in
respect of sales, $68.0 million in respect of operating cash flow, $82.3 million
in  respect of operating  income, $111.5 million  in respect of  net income, and
$96.6 million in respect of projected  1996 net income. Morgan Keegan  concluded
that,  based on this analysis, Microtek had an implied equity value range of $68
to $97 million.
 
    MERGERS AND  ACQUISITIONS  TRANSACTION  ANALYSIS.   Morgan  Keegan  reviewed
overall  merger and acquisition activity in the healthcare industry and selected
ten transactions occurring between 1992  and June, 1996 with publicly  available
financial  information  to  analyze on  the  basis  of the  purchase  prices and
multiples paid or  proposed consideration  to be paid.  Such analysis  indicated
median  adjusted market values as multiples of latest 12 months sales, operating
cash flow  and operating  income of  0.96x, 9.2x  and 11.3x,  respectively;  and
median market values as multiples of net income and tangible book value of 20.1x
and  3.1x, respectively. Morgan  Keegan applied these  multiples to Microtek and
calculated median indicative equity values of $10.7 million in respect of sales,
$42.8 million in  respect of operating  cash flow, $39.5  million in respect  of
operating  income, $54.3 million in respect of net income, and for tangible book
value being not meaningful. Morgan Keegan also reviewed the premiums paid in the
selected  transactions.   Such   analysis   indicated   that   the   per   share
 
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<PAGE>
value  of the consideration paid represented a  median premium of 48.8% over the
market price of  the acquired  company's common stock  four weeks  prior to  the
first  trading  day following  announcement  of the  transaction.  Applying this
median premium to Microtek yielded an indicative equity value of $86.6  million.
Morgan  Keegan concluded  that, based upon  this analysis,  Microtek had implied
equity value in the range  of $40 to $54  million. In Morgan Keegan's  judgment,
the application of merger and acquisition transaction multiples to the pro forma
results  of  Microtek's latest  12 months  ended  February 29,  1996 understates
value.
 
    No company or transaction  used in the  comparable companies and  comparable
transactions  analyses  for  comparative  purposes  is  identical  to  Microtek.
Accordingly, an analysis of  the results of  the foregoing necessarily  involves
complex considerations and judgments concerning the differences in financial and
operating  characteristics  of  the companies  and  other  factors. Mathematical
analysis (such  as determining  the average  or  median) is  not, in  itself,  a
meaningful method of using comparable company or transaction data.
 
    DISCOUNTED CASH FLOW ANALYSIS  Morgan Keegan prepared a discounted cash flow
analysis  of the projected free cash flow of Microtek for the years 1996 through
2000, based upon five year projections provided by Microtek's management.  Using
this  information, Morgan Keegan  estimated the net  present value of Microtek's
projected cash flows  by applying discount  rates ranging from  13.0% to  17.0%.
Morgan Keegan also determined the residual value of Microtek by applying a range
of  terminal operating cash flow  multiples of from 7.5x  to 10.5x to Microtek's
projected cash flows and discounting these terminal values using discount  rates
ranging from 13.0% to 17.0%. The sum of the present value of the free cash flows
and  terminal values yielded an implied equity  value range for Microtek of $104
million to $174 million.
 
    PRO FORMA EARNINGS  PER SHARE  ANALYSIS.   Morgan Keegan  also analyzed  the
effect  of the Merger on the financial projections of Isolyser assuming a $16.50
price per share for  Microtek Common Stock.  Isolyser's stand alone  projections
for  1996 and 1997 were compared with the pro forma combined company projections
for earnings per share  and other measures of  profitability. The pro forma  net
income per share figures were then compared to Isolyser's projected earnings per
share  to determine  the degree  of dilution,  if any,  to Isolyser shareholders
subsequent to the Merger. This analysis indicated that the Merger was  accretive
to earnings per share.
 
    The  foregoing summary of Morgan Keegan's presentation and analyses does not
purport to be a complete description of such presentation to the Isolyser  Board
of Directors or of the analyses performed by Morgan Keegan. The preparation of a
fairness  opinion is not necessarily susceptible  to partial analysis or summary
description. Morgan Keegan believes that its analyses and the summary set  forth
above must be considered as a whole and that selecting portions of its analyses,
without  considering all analyses, or of  the above summary, without considering
all factors  and  analyses, would  create  an  incomplete view  of  the  process
underlying  the analyses  presented to the  Isolyser Board of  Directors and its
opinion. In addition, Morgan Keegan may have deemed various assumptions more  or
less probable than other assumptions, so that the ranges of valuations resulting
from  any particular analysis  described above should not  be taken to represent
the actual value of Microtek or the combined company.
 
    In performing its  analyses, Morgan  Keegan made  numerous assumptions  with
respect  to industry performance,  general business and  economic conditions and
other matters, many of which are beyond the control of Isolyser or Microtek. The
analyses performed by  Morgan Keegan  are not necessarily  indicative of  actual
values  or  actual  future results,  which  may  be significantly  more  or less
favorable than suggested by such analyses. Such analyses were prepared solely as
part of Morgan  Keegan's analysis  of the fairness,  from a  financial point  of
view,  to  the shareholders  of  Isolyser of  the  consideration to  be  paid by
Isolyser pursuant to the First Amended Merger Agreement and the Merger Agreement
and were discussed with Isolyser's Board of  Directors at the June 21, 1996  and
July  29, 1996  meetings. The  analyses do  not purport  to be  appraisals or to
reflect prices at which a company might actually be sold or the prices at  which
any    securities    may   trade    at   the    present    time   or    at   any
 
                                       26
<PAGE>
time  in  the  future.  In   addition,  as  described  above,  Morgan   Keegan's
presentation  to  Isolyser's Board  of  Directors and  opinion  was one  of many
factors taken into consideration  by the Isolyser Board  of Directors in  making
its determination to approve the Merger Agreement and the Merger.
 
    In  addition to rendering its opinions, as noted above, Morgan Keegan has in
the past provided investment banking services to Isolyser, for which it received
customary fees. Morgan Keegan was also engaged by Isolyser in February, 1996  to
perform investment banking services and act as financial advisor with respect to
other possible acquisition transactions. In the ordinary course of its business,
Morgan  Keegan  makes a  market  in Isolyser  Common  Stock and  may  trade such
securities for its own account and for  the account of its customers and may  at
any time hold a short or long position in such securities.
 
    Pursuant to an engagement letter with Isolyser, Morgan Keegan has received a
fee  of $300,000 for rendering its opinions with respect to the Merger, and will
receive a fee of $350,000 upon consumation of the Merger in connection with  its
advisory  service. Isolyser has  also agreed to reimburse  Morgan Keegan for its
reasonable out-of-pocket expenses and to indemnify Morgan Keegan against certain
liabilities, including liabilities under the federal securities laws.
 
OPINION OF MICROTEK'S FINANCIAL ADVISOR
 
    On March 15, 1996, Goldman Sachs delivered its written opinion to the  Board
of  Directors of  Microtek that, as  of the  date of such  opinion, the Exchange
Ratio pursuant  to the  Original Merger  Agreement was  fair to  the holders  of
shares  of Microtek Common Stock. On June  23, 1996, Goldman Sachs delivered its
written opinion to the Board  of Directors of Microtek that,  as of the date  of
such  opinion, the exchange ratio pursuant to the First Amended Merger Agreement
was fair to the holders  of shares of Microtek Common  Stock. On July 29,  1996,
Goldman  Sachs  delivered  its written  opinion  to  the Board  of  Directors of
Microtek that, as of the  date of such opinion,  the Exchange Ratio pursuant  to
the Merger Agreement is fair to the holders of the Microtek Common Stock.
 
    THE  FULL TEXT OF THE WRITTEN OPINION  OF GOLDMAN SACHS DATED JULY 29, 1996,
WHICH SETS FORTH  ASSUMPTIONS MADE,  MATTERS CONSIDERED AND  LIMITATIONS ON  THE
REVIEW UNDERTAKEN IN CONNECTION WITH THE OPINION, IS ATTACHED AS ANNEX C TO THIS
PROXY STATEMENT/PROSPECTUS AND IS INCORPORATED HEREIN BY REFERENCE. STOCKHOLDERS
OF MICROTEK ARE URGED TO, AND SHOULD, READ SUCH OPINION IN ITS ENTIRETY.
 
    In  connection with its opinion, Goldman Sachs reviewed, among other things,
(i) the Merger Agreement; (ii) the  Registration Statement on Form S-4 of  which
this  Joint Proxy Statement/Prospectus forms a part; (iii) the Annual Reports to
Stockholders and Annual  Reports on Form  10-K of Microtek  for the four  fiscal
years  ended November 30, 1995 and for  Isolyser for the year ended December 31,
1995; Forms S-1, effective October 20, 1994, and November 17, 1995, of  Isolyser
and  the  Prospectus  utilized  in connection  therewith;  (iv)  certain interim
reports to stockholders and  Quarterly Reports on Form  10-Q of Microtek and  of
Isolyser;  (v) certain other communications from  Microtek and Isolyser to their
respective stockholders;  and  (vi)  certain  internal  financial  analyses  and
forecasts  for Microtek and  Isolyser prepared by  their respective managements.
Goldman Sachs also  held discussions with  members of the  senior management  of
Microtek  and of  Isolyser regarding the  past and  current business operations,
financial condition,  and future  prospects of  their respective  companies.  In
addition, Goldman Sachs reviewed the reported price and trading activity for the
shares  of  Microtek  Common Stock  and  the  shares of  Isolyser  Common Stock,
compared certain financial  and stock  market information for  Microtek and  for
Isolyser  with similar information for certain other companies the securities of
which are  publicly  traded, reviewed  the  financial terms  of  certain  recent
business  combinations  in  the  medical  device  and  hospital  supply industry
specifically and in other industries generally and performed such other  studies
and analyses as it considered appropriate.
 
    Goldman  Sachs relied without independent verification upon the accuracy and
completeness of all of  the financial and other  information reviewed by it  for
purposes of its opinion. In that regard, Goldman Sachs assumed, with the consent
of  Microtek,  that  the  financial  forecasts  for  the  Company  and Isolyser,
including, without limitation,  projected cost savings  and operating  synergies
resulting
 
                                       27
<PAGE>
from  the Merger have  been reasonably prepared  on a basis  reflecting the best
currently available judgments and estimates of Microtek and of Isolyser and that
such financial  forecasts will  be realized  in  the amounts  and at  the  times
contemplated  thereby. In  addition, Goldman Sachs  has not  made an independent
evaluation or appraisal of the assets and liabilities of Microtek or of Isolyser
or any of their subsidiaries and Goldman  Sachs has not been furnished with  any
such  evaluation  or  appraisal.  Goldman Sachs  assumed,  with  the  consent of
Microtek, that the consummation of the Merger will be accounted for as a pooling
of interests under generally accepted accounting principles.
 
    The following is  a summary  of certain of  the financial  analyses used  by
Goldman  Sachs in  connection with providing  its written  opinion to Microtek's
Board of Directors on  July 29, 1996. Goldman  Sachs utilized substantially  the
same  type  of  financial  analyses in  connection  with  providing  its written
opinions dated March 15, 1996 and June 23, 1996.
 
        (i) INDEXED  COMMON  STOCK PRICE  HISTORY.  Goldman Sachs  reviewed  the
    indexed  historical trading prices  for the shares  of Microtek Common Stock
    during the period since the initial  public offering of Microtek on  October
    6,  1992 as  compared to  the Standard  & Poor's  500 index,  the Standard &
    Poor's Healthcare  index,  the indexed  historical  trading prices  for  the
    shares  of Isolyser  Common Stock  and a  composite index  comprised of five
    other comparable publicly  traded corporations:  Circon Corporation,  CONMED
    Corporation,  MAXXIM  Medical,  Inc., Sterile  Concepts  Holdings,  Inc. and
    Tecnol Medical  Products,  Inc.  (the "Selected  Companies").  The  Selected
    Companies  were  chosen  because  they  are  publicly-traded  companies with
    operations that  for  purposes of  analysis  may be  considered  similar  to
    Microtek.
 
        (ii)  SELECTED COMPANIES  ANALYSIS. Goldman Sachs  reviewed and compared
    certain  financial  information  relating   to  Microtek  and  Isolyser   to
    corresponding  financial information, ratios and public market multiples for
    the Selected  Companies.  Goldman  Sachs  calculated  and  compared  various
    financial  multiples and ratios. The multiples of Microtek and Isolyser were
    calculated using a price  of $13.25 per share  of Microtek Common Stock  and
    $10.13 per share of Isolyser Common Stock, the closing prices of such shares
    on  Nasdaq on July 26, 1996  (the last trading day prior  to the date of the
    fairness opinion). The multiples and ratios  for Microtek were based on  the
    most  recently  available  public information  and  information  provided by
    Microtek's management, and the multiples and ratios for Isolyser were  based
    on  the most recently available  public information and information provided
    by Isolyser's  management  and  the  multiples  for  each  of  the  Selected
    Companies were based on the most recent publicly available information. With
    respect  to the Selected Companies,  Goldman Sachs considered levered market
    capitalization (i.e., market  value of common  equity plus estimated  market
    value of debt less cash) as a multiple of last twelve months' ("LTM") sales,
    as  a  multiple of  LTM earnings  before  interest, taxes,  depreciation and
    amortization ("EBITDA") and as  a multiple of  LTM earnings before  interest
    and  taxes ("EBIT"). For fiscal 1995 results, Goldman Sachs' analyses of the
    Selected Companies indicated  levered multiples of  LTM sales, which  ranged
    from  0.7x to 2.7x,  with a mean of  1.5x and a median  of 1.1x, LTM EBITDA,
    which ranged from 6.1x to 11.2x, with a  mean of 9.0x and a median of  9.4x,
    and  LTM EBIT, which ranged from  9.2x to 14.6x, with a  mean of 12.2x and a
    median of 11.9x,  compared to levered  multiples of 2.5x,  11.9x and  15.4x,
    respectively, for Microtek and a levered multiple of 2.3x sales for Isolyser
    (with  Isolyser's EBITDA  and EBIT  being not  meaningful). For  fiscal 1995
    results, Goldman Sachs also considered for the Selected Companies LTM price/
    earnings multiples ("P/E"), which ranged from 14.5x to 23.6x, with a mean of
    18.0x and a median of 17.0x, compared to 28.2x for Microtek (with Isolyser's
    LTM P/E being  not meaningful); estimated  calendar year 1996  and 1997  P/E
    (provided  by Institutional Brokers Estimate  System ("IBES")), which ranged
    from 12.3x to 17.9x for estimated calendar  year 1996, with a mean of  15.2x
    and  a median of 15.3x, and 10.6x to 14.0x for estimated calendar year 1997,
    with a mean  and a median  of 12.2x,  compared, for Microtek,  to 20.4x  for
    estimated  calendar year 1996 and 9.8x for estimated calendar year 1997 and,
    for Isolyser,  to 168.8x  for estimated  calendar year  1996 and  18.8x  for
    estimated calendar year 1997 based on Isolyser's management's estimates; LTM
    EBITDA  margins, LTM EBIT  margins and LTM net  income margins, which ranged
    from 8.7% to
 
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<PAGE>
    24.8% for LTM EBITDA margins,  with a mean of 16.4%  and a median of  13.5%,
    compared to 21.3% for Microtek (with Isolyser's LTM EBITDA margins being not
    meaningful),  7.1 to 19.7% for LTM EBIT margins,  with a mean of 12.2% and a
    median of 8.5%,  compared to 16.4%  for Microtek (with  Isolyser's LTM  EBIT
    margins being not meaningful), and 3.3% to 11.3% for LTM net income margins,
    with  a mean  of 6.6% and  a median of  3.9%, compared to  8.4% for Microtek
    (with Isolyser's LTM net income  margins being not meaningful); a  five-year
    compound  annual  growth rate  of earnings  per share  ("EPS") for  the five
    fiscal years ending in 2000  (provided by IBES in  the case of the  Selected
    Companies  and Isolyser, and Microtek management  in the case of Microtek as
    no public estimates were available) ranging from 14.0% to 20.0%, with a mean
    of 17.4% and a median of 18.0%, compared to 42.9% for Microtek and 50.0% for
    Isolyser; net debt to net capitalization ratios, which ranged from (6.0)% to
    48.8%, with a mean  of 26.8% and  a median of 36.1%,  compared to 47.8%  for
    Microtek  and (11.3%) for  Isolyser; and a  ratio of the  1997 estimated P/E
    compared to the IBES  estimated EPS growth rate  ranging from 0.6x to  0.8x,
    with a mean and a median of 0.7x, compared to 0.2x for Microtek and 0.4x for
    Isolyser.
 
       (iii)  PRO  FORMA  MERGER  ANALYSIS.  Goldman  Sachs  prepared  pro forma
    analyses of the financial impact of the Merger. Using earnings estimates for
    Microtek and Isolyser prepared by their respective managements for the years
    1996 and 1997, Goldman Sachs compared the EPS of Isolyser Common Stock, on a
    stand alone basis, to the EPS of the common stock of the combined  companies
    on a pro forma basis. Goldman Sachs performed this analysis based on a fixed
    exchange  ratio of  1.65 and on  a range of  per share prices  from $8.75 to
    $16.25 of Isolyser Common Stock under the following two scenarios: The first
    scenario  relied  on  the  Isolyser  managements'  estimates  (and  Microtek
    managements'  estimates of  Microtek net  income) and  combined Microtek and
    Isolyser as  currently  existing; the  second  scenario relied  on  Isolyser
    management's  estimates (and Microtek managements' estimates of Microtek net
    income) and  combined  Microtek  and Isolyser  as  currently  existing,  but
    included  the  realization  of  $3.5 million  in  pre-tax  cost  savings and
    operating synergies achieved in 1997. Based  on such analyses, in the  first
    scenario   the  proposed  transaction  would   be  accretive  to  Isolyser's
    stockholders on  an EPS  basis in  the estimated  year 1996  and  marginally
    dilutive  to Isolyser's stockholders on an EPS basis in estimated year 1997,
    and in the second  scenario the proposed transaction  would be accretive  to
    Isolyser's stockholders on an EPS basis in estimated years 1996 and 1997.
 
       (iv) CONTRIBUTION ANALYSIS. Goldman Sachs reviewed certain historical and
    estimated future operating and financial information (including, among other
    things,  revenues;  gross profit;  EBIT; net  income; selling,  general, and
    administration expenses; net debt; and total assets) for Microtek,  Isolyser
    and  the  pro  forma combined  entity  resulting  from the  Merger  based on
    Microtek's managements'  financial  forecasts for  Microtek  and  Isolyser's
    managements'  financial forecasts  for Isolyser. Goldman  Sachs analyzed the
    relative income  statement  contribution of  Microtek  and Isolyser  to  the
    combined  companies  on  a pro  forma  basis. This  analysis  indicated that
    Microtek would have contributed  28.5% to combined revenues  in 1995 and  an
    estimated  24.1% in 1996 decreasing  to an estimated 9.9%  in 2000, 46.1% to
    combined gross profit in 1995 and  an estimated 39.8% in 1996 decreasing  to
    an  estimated 13.5%  in 2000, (385.2)%  to combined  EBIT (such contribution
    being negative because Isolyser had negative  EBIT for 1995) in 1995 and  an
    estimated  91.6% in 1996 decreasing to  an estimated 12.7% in 2000, (424.0)%
    to combined net  income (such contribution  being negative because  Isolyser
    had  negative net  income in 1995)  in 1995  and an estimated  84.5% in 1996
    decreasing to an  estimated 12.4% in  2000, and 32.3%  to combined  selling,
    general  and administration expenses in 1995  and an estimated 25.6% in 1996
    decreasing to an estimated  13.2% in 2000. Goldman  Sachs also analyzed  the
    relative balance sheet contribution of Microtek and Isolyser to the combined
    companies  on  a pro  forma basis.  This analysis  indicated that,  based on
    fiscal year 1995, Microtek would  have contributed (239.3)% to combined  net
    cash  (such contribution  being negative  because Isolyser  had net  cash in
    1995) and 17.8% of the total assets to the combined entity.
 
                                       29
<PAGE>
        (v)  SELECTED  TRANSACTIONS  ANALYSIS.  Goldman  Sachs  analyzed certain
    information relating  to selected  transactions in  the medical  device  and
    hospital  supply  industry since  1988  (the "Selected  Transactions"). Such
    analysis indicated that for the Selected Transactions (i) levered  aggregate
    consideration  as a multiple of  LTM sales ranged from  0.4x to 2.7x, with a
    mean of 1.3x and a median of 1.1x, (ii) aggregate equity consideration as  a
    multiple  of LTM net income ranged from 20.8x to 50.0x, with a mean of 36.1x
    and a median of 35.3x, (iii)  levered aggregate consideration as a  multiple
    of  LTM EBIT ranged from 7.2x to 32.9x, with a mean of 15.3x and a median of
    13.2x, and (iv)  the percentage premium  paid ranged from  15.7% to  100.0%,
    with a mean of 52.3% and a median of 45.2%.
 
       (vi)  ANALYSIS AT  VARIOUS PRICES.  Goldman Sachs  calculated alternative
    values for  the levered  aggregate consideration  and the  aggregate  equity
    consideration  based upon  per share values  of Isolyser  Stock ranging from
    $8.75 to $16.25 per share of Isolyser Common Stock.
 
        Those  calculations  yielded  levered  aggregate  consideration   values
    ranging  from $76.6 million  to $142.3 million  for Microtek, assuming $22.9
    million in net debt, and total  values delivered for each share of  Microtek
    Common Stock ranging from $14.44 to $26.81 per such share. The multiples and
    ratios  for  Microtek  for  actual  1995 were  based  on  public  filings of
    Microtek; for estimated fiscal year 1996, on Microtek's management or, where
    noted, IBES  estimates; and  for estimated  fiscal year  1997 on  Microtek's
    management estimates.
 
        Goldman  Sachs  considered  the  levered  aggregate  consideration  as a
    multiple of actual 1995, LTM through May 31, 1996 and estimated fiscal  1996
    and  1997 net  sales, EBITDA and  EBIT of Microtek.  Goldman Sachs' analyses
    indicated levered aggregate consideration multiples of actual 1995 net sales
    that ranged from 3.3x to 5.5x, actual 1995 EBITDA that ranged from 17.6x  to
    29.2x and actual 1995 EBIT that ranged from 22.7x to 37.7x; of LTM net sales
    that  ranged from 2.8x to  4.7x, LTM EBITDA that  ranged from 11.3x to 18.7x
    and LTM EBIT that ranged from 16.4x  to 27.3x; of estimated fiscal 1996  net
    sales  that  ranged from  2.3x to  3.8x, estimated  fiscal 1996  EBITDA that
    ranged from 9.2x to  15.3x and estimated fiscal  1996 EBIT that ranged  from
    11.9x to 19.8x; and of estimated fiscal 1997 net sales that ranged from 1.9x
    to  3.2x, estimated fiscal  1997 EBITDA that  ranged from 6.6x  to 11.0x and
    estimated fiscal 1997 EBIT that ranged from 8.0x to 13.2x.
 
        Goldman Sachs also  considered the aggregate  equity consideration as  a
    multiple  of actual 1995, LTM through February 29, 1996 and estimated fiscal
    1996 and 1997 net income  (based on management estimates), estimated  fiscal
    1996  net income (based  on IBES estimates)  and actual 1995  book value per
    share of Microtek Common Stock. Goldman Sachs' analyses indicated  aggregate
    equity  consideration multiples of  actual 1995 net  income of Microtek that
    ranged from 33.2x  to 61.7x; of  LTM net  income that ranged  from 24.6x  to
    45.7x;  of management estimated 1996 net income of Microtek that ranged from
    19.3x to 35.8x; of  IBES estimated 1996 net  income of Microtek that  ranged
    from  25.6x to  47.6x; of management  estimated 1997 net  income of Microtek
    that ranged from 11.4x  to 21.2x; and of  Microtek's actual 1995 book  value
    per share that ranged from 3.7x to 6.8x.
 
       (vii) DISCOUNTED CASH FLOW ANALYSIS. Goldman Sachs performed a discounted
    cash flow analysis based on the Microtek management's estimates for Microtek
    as  currently existing. Goldman Sachs calculated a net present value of free
    cash flows for the years 1996 through 2000 using discount rates ranging from
    14% to 24%. Goldman Sachs calculated Microtek's terminal values in the  year
    2000  based  on multiples  ranging from  2.00x sales  to 3.00x  sales. These
    terminal values were then discounted  to present value using discount  rates
    from 14% to 24%.
 
        Using  the  foregoing  terminal  values and  discounted  cash  flows for
    Microtek, the implied per share values ranged from $9.68 to $23.53.
 
    The preparation  of a  fairness opinion  is  a complex  process and  is  not
necessarily  susceptible to  partial analysis or  summary description. Selecting
portions of the analyses or of the summary set forth
 
                                       30
<PAGE>
above, without considering the analyses as  a whole, could create an  incomplete
view  of the  processes underlying  Goldman Sachs'  opinion. In  arriving at its
fairness determination,  Goldman  Sachs  considered  the  results  of  all  such
analyses.  No company or transaction used in  the above analyses as a comparison
is identical  to  Microtek or  Isolyser  or the  contemplated  transaction.  The
analyses  were  prepared solely  for purposes  of  Goldman Sachs'  providing its
opinion to Microtek's  Board of  Directors as to  the fairness  of the  Exchange
Ratio  pursuant to  the Merger  Agreement to the  holders of  shares of Microtek
Common Stock and  do not  purport to be  appraisals or  necessarily reflect  the
prices  at which businesses  or securities actually may  be sold. Analyses based
upon forecasts of future results are not necessarily indicative of actual future
results, which may  be significantly more  or less favorable  than suggested  by
such  analyses.  Because such  analyses are  inherently subject  to uncertainty,
being based upon numerous  factors or events beyond  the control the parties  or
their  respective advisors,  none of  Microtek, Isolyser,  Goldman Sachs  or any
other person assumes responsibility if  future results are materially  different
from those forecast.
 
    As  described above,  Goldman Sachs'  opinion to  the Board  of Directors of
Microtek was one of many factors taken into consideration by the Microtek  Board
of  Directors in making  its determination to approve  the Merger Agreement. The
foregoing summary does not purport to be a complete description of the  analyses
performed  by Goldman Sachs and is qualified by reference to the written opinion
of Goldman Sachs set forth in Annex C hereto.
 
    Goldman Sachs, as part  of its investment  banking business, is  continually
engaged  in the valuation of businesses  and their securities in connection with
mergers  and  acquisitions,  negotiated  underwritings,  competitive   biddings,
secondary  distributions of listed and  unlisted securities, private placements,
and valuations  for  estate, corporate  and  other purposes.  Microtek  selected
Goldman  Sachs as  its financial advisor  because it is  a nationally recognized
investment banking firm that has substantial experience in transactions  similar
to the Merger.
 
    Goldman  Sachs provides  a full range  of financial,  advisory and brokerage
services and in the  course of its  normal trading activities  may from time  to
time  effect transactions  and hold  positions in  the securities  or options on
securities of Microtek and/or Isolyser for  its own account and for the  account
of customers.
 
    Pursuant  to a letter agreement dated  April 15, 1994 (the "First Engagement
Letter"), Microtek engaged  Goldman Sachs  to act  as its  financial advisor  in
connection  with the possible  sale of Microtek. Pursuant  to a letter agreement
dated March  14,  1996  (the  "Second Engagement  Letter"),  which  amended  and
supplemented  the First Engagement Letter, Microtek engaged Goldman Sachs to act
as its financial advisor in connection with the Merger. Pursuant to the terms of
the Second Engagement  Letter, Microtek  has agreed  to pay  Goldman Sachs  upon
consummation  of  the Merger  a transaction  fee of  $1.5 million.  Microtek has
agreed to reimburse  Goldman Sachs  for its  reasonable out-of-pocket  expenses,
including  attorney's  fees,  and  to indemnify  Goldman  Sachs  against certain
liabilities, including certain liabilities under the federal securities laws.
 
INTEREST OF CERTAIN PERSONS IN THE MERGER
 
    MICROTEK STOCK OPTIONS.  Each of  Messrs. Lester J. Berry, Kimber L.  Vought
and  Dan R. Lee (directors and/or executive  officers of Microtek) is a party to
option agreements with  Microtek pursuant  to which  he has  options to  acquire
shares   of  Microtek  Common  Stock.   See  "Option  Proposal"  for  additional
information regarding  options  held  by  such individuals.  If  the  Merger  is
consummated,  Isolyser will assume  all outstanding options  granted by Microtek
(including those described above) and such  optionees will then have options  to
purchase  Isolyser Common Stock. The result of  such assumption will be that the
exercise price for each of the above-referenced options will likely be less than
the market price of Isolyser Common  Stock, and that the options, if  exercised,
would  likely  be more  valuable  immediately after  the  Merger than  they were
immediately prior to  the announcement of  the Merger. In  addition, the  option
agreements  pursuant to which each of the officers, employees and consultants of
Microtek is a party  contain change of  control provisions and,  as a result  of
those
 
                                       31
<PAGE>
provisions,  all of the options  held by the officers  and employees of Microtek
(including Messrs. Berry,  Vought and  Lee) will become  fully exercisable  upon
consummation of the Merger. See "-- Treatment of Outstanding Microtek Options."
 
    EMPLOYMENT  OF MICROTEK  DIRECTORS AND  EXECUTIVE OFFICERS.   Messrs. Berry,
Vought and Lee are expected to remain as employees of Microtek after the Merger.
None of these individuals, however, has  entered into, and none are expected  to
enter  into, an  employment agreement with  Isolyser. After the  Merger, each of
these individuals will be eligible to participate in benefit plans provided  for
the officers of Isolyser and its subsidiaries.
 
    INDEMNIFICATION.    The Merger  Agreement  provides that  (i)  Isolyser will
indemnify the present and former officers  and directors of Microtek in  certain
circumstances;  (ii) Isolyser  will not  amend or  repeal any  provisions of the
Certificate of Incorporation  or Bylaws of  Microtek in any  manner which  would
adversely   affect  the  indemnification  provisions  contained  in  the  Merger
Agreement; and (iii) for a period of two years from the Effective Date, Microtek
shall  maintain  directors'  and  officers'  liability  insurance  covering  the
directors and officers covered on the date of the Merger Agreement by Microtek's
directors'   and  officers'  liability  insurance  policy  or  cause  Isolyser's
directors' and  officers'  liability insurance  policy  to cover  such  persons,
except  that neither Microtek nor Isolyser  shall be required, in the aggregate,
to expend in premiums for such insurance an amount greater than double the  rate
paid  by  Microtek  for the  policy  period  immediately preceding  the  date of
execution of  the  Merger Agreement  and  except  that Isolyser  shall  have  no
liability  or obligation to maintain such insurance  to the extent that any such
policy is  not  reasonably  available  on  the  terms  required  by  the  Merger
Agreement. See "-- Certain Covenants."
 
    CHANGE  OF  CONTROL  PROVISIONS.    Employment  agreements  entered  into by
Microtek with  Mr.  Berry, John  N.  Jordan,  the president  of  the  Medi-Plast
division  of Microtek, and  Joe Prince, the  executive vice president, corporate
development of Microtek, contain certain change of control provisions which will
come into  effect upon  consummation  of the  Merger.  In consideration  of  Mr.
Berry's  agreement  to delete  certain  provisions in  his  employment agreement
providing for  certain cash  payments  upon a  change  of control,  Mr.  Berry's
employment  agreement was amended in January 1994 to provide that Microtek would
pay to Mr. Berry a bonus to the  extent he did not receive a profit of  $300,000
before  taxes on his stock  option to purchase 40,000  shares of Microtek Common
Stock at an exercise price of $5.25  per share in the event of the  consummation
of  certain  defined  change of  control  transactions which  would  include the
Merger. Accordingly, it  would be anticipated  that Mr. Berry  would realize  in
excess of $300,000 of profit before taxes if he were able to liquidate his stock
options  concurrently with the consummation of  the Merger. Mr. Berry has agreed
that the relevant  time to calculate  his profit  on his stock  options for  the
purpose of said provisions of his employment agreement is the date of closing of
the Merger, regardless of when he liquidates his options. Each of Messrs. Jordan
and  Prince  are parties  to employment  agreements  with Microtek  entered into
concurrently with Microtek's acquisition of  substantially all of the assets  of
Medi-Plast  on November 30,  1995, providing for  a base salary  of $140,000 per
year, bonuses  in such  amounts as  may be  established by  Microtek's Board  of
Directors  from time  to time in  its discretion,  insurance (including, without
limitation, major  medical,  life and  disability  insurance) and  other  fringe
benefits   in  accordance  with  Microtek's  standard  insurance  practices  for
executives and as may be authorized and  adopted from time to time by  Microtek.
In the event either of Messrs. Jordan or Prince elect to resign their employment
within  six  months following  the Effective  Date, they  are entitled  to their
respective salary, bonus  and other benefits  over the remaining  term of  their
respective employment agreements, which expire on November 29, 1998. Microtek is
currently  completing separation  agreements with  Messrs. Jordan  and Prince by
means of which Microtek and Isolyser anticipate incurring compensation  expenses
in   connection  with  the  Merger  approximating  amounts  payable  under  such
employment agreements.
 
                                       32
<PAGE>
EFFECTIVE DATE AND CONSEQUENCES OF THE MERGER
 
    If approved  by the  requisite  vote of  the  stockholders of  Microtek  and
Isolyser,  and if  all other  conditions to the  consummation of  the Merger are
satisfied or  waived,  the  Merger  will become  effective,  unless  the  Merger
Agreement  is terminated as provided therein, upon the making of certain filings
with the Secretary of State  of the State of  Delaware pursuant to the  Delaware
General  Corporation  Law  (the "DGCL").  At  the Effective  Date,  the Isolyser
Subsidiary will be merged  with and into Microtek,  which will be the  surviving
corporation  in the Merger, and the separate corporate existence and identity of
the Isolyser  Subsidiary will  cease. The  corporate existence  and identity  of
Microtek  will  continue unaffected  by the  Merger, although  it will  become a
wholly-owned subsidiary of Isolyser.
 
    It is currently  contemplated that  the Effective  Date of  the Merger  will
occur  as  promptly as  practicable  after the  approval  of the  Merger  by the
Isolyser and  Microtek  stockholders  at  the  Isolyser  and  Microteck  Special
Meetings,  subject to the conditions described  under "-- Conditions to Merger."
Upon completion of the  Merger, each Microtek Share  will be converted into  the
right  to  receive  the number  of  Isolyser  Shares described  above  under "--
General." The directors  of the  Isolyser Subsidiary  will be  the directors  of
Microtek after the Effective Date. The current officers of Microtek are expected
to remain as the officers of Microtek.
 
    In  the  event that  either the  Microtek or  Isolyser stockholders  fail to
approve the  Merger Agreement,  Microtek will  continue to  pursue its  business
strategy,  including seeking suitable acquisition candidates to provide Microtek
with access to new markets and customers.
 
EXCHANGE OF CERTIFICATES REPRESENTING MICROTEK SHARES
 
    Instructions with regard  to the surrender  of Microtek stock  certificates,
together  with a  letter of  transmittal to  be used  for this  purpose, will be
mailed to Microtek stockholders as  promptly as practicable after the  Effective
Date.  In  order to  receive certificates  evidencing  the Isolyser  Shares, the
stockholders of Microtek will be required to surrender their stock  certificates
after  the Effective Date, together with a duly completed and executed letter of
transmittal, to SunTrust Bank, which will  act as Exchange Agent (the  "Exchange
Agent")  in  connection  with the  Merger.  Promptly after  the  Effective Date,
Isolyser will deposit in trust with the Exchange Agent certificates representing
the number of whole Isolyser Shares to which the holders of Microtek Shares  are
entitled  to receive  in the  Merger together  with cash  sufficient to  pay for
fractional shares.  Upon  receipt  of  such stock  certificates  and  letter  of
transmittal,  the Exchange Agent  will issue a  stock certificate evidencing the
Isolyser Shares to  the registered holder  or his transferee  for the number  of
Isolyser  Shares such person is  entitled to receive as  a result of the Merger,
together with cash in lieu of any fractional share. No interest will be paid  or
accrued   on  the  amounts   payable  upon  the   surrender  of  Microtek  stock
certificates.
 
    STOCKHOLDERS OF  MICROTEK SHOULD  NOT SUBMIT  THEIR STOCK  CERTIFICATES  FOR
EXCHANGE UNTIL THE INSTRUCTIONS AND LETTER OF TRANSMITTAL ARE RECEIVED.
 
    If  any certificate  for the  Isolyser Shares  is to  be issued  or any cash
payment for a fractional share is to be  made to a person other than the  person
in  whose name the  certificate for the Microtek  Shares surrendered in exchange
therefor is registered, it will be a condition of such issuance or payment  that
the  stock  certificate so  surrendered be  properly  endorsed and  otherwise in
proper form  for transfer,  and  that the  person  requesting such  issuance  or
payment (i) pay in advance any transfer or other taxes required by reason of the
issuance  of certificates for  the Isolyser Shares or  a check representing cash
for a fractional  share to  a person  other than  the registered  holder of  the
Microtek  stock certificate surrendered or (ii) establish to the satisfaction of
the Exchange Agent that such tax has been paid or is not applicable.
 
    After the Effective Date,  there will be no  further transfers on the  stock
transfer  books  of  Microtek  of  the  Microtek  Shares  that  were outstanding
immediately   prior    to    the    Effective    Date.    If    a    certificate
 
                                       33
<PAGE>
representing  such shares is presented for  transfer, subject to compliance with
the requisite transmittal procedures, it will be cancelled and exchanged for the
applicable number of Isolyser Shares and cash for any fractional share amount.
 
    Each certificate  representing  Microtek  Shares immediately  prior  to  the
Effective  Date  will, at  the Effective  Date,  be deemed  for all  purposes to
represent only the right to receive the  number of whole shares of the  Isolyser
Shares  (and the right  to receive cash in  lieu of any  fraction of an Isolyser
Share) into  which the  Microtek  Shares represented  by such  certificate  were
converted in the Merger.
 
    Until  a certificate which formerly  represented Microtek Shares is actually
surrendered for exchange and received by the Exchange Agent, the holder  thereof
will  not be entitled to  vote in the holder's name  or receive any dividends or
other distributions with respect to Isolyser Common Stock payable to holders  of
record  after the Effective  Date. Subject to applicable  law, upon surrender of
Microtek stock  certificates  such  dividends or  other  distributions  will  be
remitted  (without  interest)  to  the record  holder  of  certificates  for the
Isolyser Shares issued in exchange therefor.
 
    Any certificates for  the Isolyser  Shares and  cash sufficient  to pay  for
fractional  shares delivered  or made  available to  the Exchange  Agent and not
exchanged for Microtek stock certificates within six months after the  Effective
Date  will be returned by the Exchange  Agent to Isolyser, which will thereafter
act as Exchange Agent. None of Isolyser, Microtek or the Exchange Agent will  be
liable  to a holder of Microtek Shares for any of the Isolyser Shares, dividends
or other distributions thereon or cash in lieu of fractional shares delivered to
a public official pursuant to applicable abandoned property, escheat or  similar
laws.
 
NO FRACTIONAL SHARES
 
    No  fractional shares of Isolyser Common  Stock will be issued in connection
with the  Merger. All  fractional shares  of Isolyser  Common Stock  to which  a
holder  of  Microtek  Shares  immediately  prior  to  the  Effective  Date would
otherwise be entitled at the Effective Date will be aggregated. If a  fractional
share  results from such aggregation, the  Microtek stockholder will be entitled
to receive from Isolyser  an amount in  cash equal to  $10.00 multiplied by  the
fraction  of a  share of  Isolyser Common  Stock which  the Microtek stockholder
would otherwise have received. Except for such payment, no Microtek  stockholder
will  be entitled  to any  dividends or other  distributions or  other rights of
stockholders with respect to any fractional interest.
 
TREATMENT OF OUTSTANDING MICROTEK OPTIONS
 
    At March 15, 1996, a total of  711,429 shares of Microtek Common Stock  were
reserved  for issuance upon the exercise of options outstanding under the Option
Plan. Isolyser has  agreed to  assume all  of Microtek's  obligations under  the
Option  Plan in  accordance with its  terms and  conditions as in  effect at the
Effective Date, except that (i) all actions to be taken thereunder by the  Board
of  Directors of Microtek or a committee thereof  shall be taken by the Board of
Directors of Isolyser or a committee thereof, (ii) each option shall  thereafter
evidence  the right to purchase only the number of whole Isolyser Shares (to the
nearest whole  share)  which would  have  been  issued if  the  Microtek  Shares
represented  by the option had been outstanding at the Effective Date, (iii) the
exercise price for each share of Isolyser Common Stock issued upon the  exercise
of  options will be  equal to the  option price per  share in effect immediately
prior to the Effective  Date divided by the  Exchange Ratio. In accordance  with
the  terms  of options  outstanding under  the Option  Plan, such  options shall
become immediately exercisable upon the Effective Date.
 
CONDITIONS TO THE MERGER
 
    In addition to customary conditions,  the obligations of Isolyser,  Microtek
and  the  Isolyser  Subsidiary  to  consummate the  Merger  are  subject  to the
satisfaction, or where permitted, waiver of, certain other conditions, including
(a) the absence of any action, suit or proceeding to restrain, modify, enjoin or
prohibit the  carrying  out  of  the transactions  contemplated  by  the  Merger
Agreement; (b) receipt of certain governmental approvals; and (c) the receipt of
officer certificates.
 
                                       34
<PAGE>
    In  addition, Isolyser's obligation  to consummate the  Merger is subject to
various additional conditions, including (a) approval of the Merger Proposal  by
majority  vote of the shares of Isolyser Common Stock voting on such proposal at
the Isolyser  Meeting, (b)  the  absence of  any  material adverse  change  with
respect  to  Microtek,  (c) receipt  of  a satisfactory  letter  from Microtek's
independent  accountants  with  respect  to  certain  financial  information  of
Microtek,  and (d) the  receipt of a  letter from an  independent accountant for
Isolyser dated the Effective Date stating that such firm concurs that the Merger
will  qualify  as  a   pooling-of-interests  transaction,  subject  to   certain
assumptions.
 
    Microtek's  obligation  to  consummate  the  Merger  is  subject  to various
additional conditions,  including  (a)  approval  and  adoption  of  the  Merger
Agreement  by the affirmative vote of a majority of the Microtek Shares; (b) the
authorization for listing on Nasdaq of the  Isolyser Shares to be issued in  the
Merger  and upon the exercise of the Options;  (c) the absence of any stop order
suspending the effectiveness of the Registration Statement or preventing the use
thereof or of any related prospectus; (d) the receipt by Microtek of an  opinion
of  Arnall  Golden &  Gregory,  counsel for  Isolyser,  that subject  to certain
exceptions and assumptions, no gain or  loss will be recognized by the  Microtek
stockholders  as a  result of the  Merger; and  (e) the absence  of any material
adverse change with respect to Isolyser.
 
    Each of Microtek and Isolyser maintain credit facilities with Chemical  Bank
for certain revolving credit and term loans containing covenants prohibiting the
Merger  absent  obtaining the  prior written  consent  of Chemical  Bank. Unless
waived, the obligations of Microtek and Isolyser under the Merger Agreement  are
respectively  conditioned upon procuring such consent. Although each of Microtek
and  Isolyser  anticipate   obtaining  such  consent   based  upon   preliminary
conversations  with Chemical Bank,  there can be no  assurance that such consent
will be  obtained.  In addition,  the  credit facility  maintained  by  Microtek
includes  provisions for  a pre-payment penalty  in the amount  of $480,000 upon
termination of such credit facility at any time prior to November 30, 1996. Each
of Microtek and Isolyser will request that such pre-payment penalty be waived in
connection with this transaction, although there  can be no assurance that  such
pre-payment  penalty,  or other  amounts, will  not  be required  to be  paid in
connection with such credit facilities and the consummation of the Merger.
 
AMENDMENT OF THE MERGER AGREEMENT; WAIVER OF CONDITIONS
 
    The respective Boards of Directors of Isolyser, the Isolyser Subsidiary  and
Microtek  may, by written agreement, at any time before or after the approval of
the Merger Agreement by the Microtek  or Isolyser stockholders (or both),  amend
the Merger Agreement, provided that after such stockholder approval no amendment
or modification may be made that would adversely affect the Microtek or Isolyser
stockholders  or alter or change the number of Isolyser Shares to be received in
exchange  for  the  Microtek  Shares  without  the  further  approval  of   such
stockholders.  Each party may, to the  extent legally permitted, extend the time
for the performance of any of the  obligations of any other party to the  Merger
Agreement,  waive any inaccuracies  in the representations  or warranties of any
other party contained in the  Merger Agreement, waive compliance or  performance
by  any other party  with any covenants, agreements  or obligations contained in
the Merger  Agreement  or  waive  the satisfaction  of  any  condition  that  is
precedent to its performance under the Merger Agreement.
 
TERMINATION OF MERGER AGREEMENT
 
    The Merger Agreement may be terminated and the Merger abandoned, at any time
prior  to  the Effective  Date,  whether before  or  after the  approval  by the
Microtek or  Isolyser stockholders  (or  both), (i)  by  the mutual  consent  of
Isolyser   and  Microtek;  (ii)  by  Isolyser  if  there  has  been  a  material
misrepresentation or breach of warranty in the representations and warranties of
Microtek made in the Merger  Agreement or there has  been a material failure  by
Microtek  to comply with its obligations  under the Merger Agreement, subject to
certain  exceptions;  (iii)   by  Microtek   if  there  has   been  a   material
misrepresentation or breach of warranty in the representations and warranties of
Isolyser  made in the Merger  Agreement or there has  been a material failure by
Isolyser to comply with its obligations  under the Merger Agreement, subject  to
certain  exceptions; (iv)  by either Isolyser  or Microtek if  all conditions to
that party's  obligation  to  consummate  the Merger  have  not  been  satisfied
 
                                       35
<PAGE>
or  waived by September 30, 1996, unless  such failure of consummation is due to
the failure  of the  terminating  party to  perform  or observe  the  covenants,
agreements,  and conditions  hereof to  be performed or  observed by  it; (v) by
either Isolyser or Microtek if the consummation of the Merger would violate  any
nonappealable  final order, decree or judgment of any court or governmental body
or agency having competent jurisdiction; (vi) by Microtek, if in the exercise of
the good faith judgment of its Board of Directors (which judgment is based  upon
the  advice of independent, outside legal counsel) as to its fiduciary duties to
its stockholders  such  termination is  required  by reason  of  an  Acquisition
Proposal;  or (vii) by Isolyser, if the Microtek Board of Directors withdraws or
materially modifies  or  changes  its  recommendation  to  the  stockholders  of
Microtek to approve the Merger Agreement and the Merger.
 
    If  Isolyser or Microtek terminates the  Merger Agreement as provided above,
there will be no liability on the  part of any party or its officers,  directors
or stockholders, except as described in "-- Fees and Expenses" below.
 
FEES AND EXPENSES
 
    Whether or not the Merger is consummated, all costs and expenses incurred in
connection  with the Merger Agreement  and the transactions contemplated thereby
will be paid by the party incurring such costs or expenses. Notwithstanding  the
foregoing,  if (a) Microtek terminates the Merger Agreement because its Board of
Directors, in the  exercise of  its good faith  judgment (based  upon advice  of
independent,   outside  legal  counsel)  as  to  its  fiduciary  duties  to  its
stockholders determines such termination is required by reason of an Acquisition
Proposal; (b)  the  Merger  Agreement  is terminated  by  Isolyser  because  the
Microtek  Board of  Directors withdraws  or materially  modifies or  changes its
recommendation to the stockholders of  Microtek to approve the Merger  Agreement
and  the Merger; or (c) on or before  September 30, 1996, Microtek enters into a
definitive  agreement  with  respect  to  an  Acquisition  Proposal,  and   such
transaction  (including  any  revised  transaction  based  upon  the Acquisition
Proposal) is  thereafter  consummated (whether  before  or after  September  30,
1996), then, upon the occurrence of (a), (b) or (c) above, Microtek shall pay to
Isolyser a fee equal to the sum of $2.5 million.
 
CERTAIN COVENANTS
 
    The  Merger Agreement provides that Microtek will not directly or indirectly
(i) solicit or initiate discussions with or (ii) enter into any negotiations  or
agreements  with, or furnish any information  that is not publicly available to,
any third party concerning an Acquisition Proposal involving Microtek; provided,
however, that Microtek  may take the  actions prohibited by  (ii) above if  such
action is taken by, or upon the authority of, the Microtek Board in the exercise
of  its  good  faith  judgment  as  to  its  fiduciary  duties  to  the Microtek
stockholders, which judgment is  based upon the  written advice of  independent,
outside  legal  counsel.  Microtek has  agreed  to notify  Isolyser  promptly in
writing if  Microtek receives  any inquiries  or proposals  with respect  to  an
Acquisition Proposal.
 
    Under  the Merger  Agreement, Microtek is  generally obligated  prior to the
Effective Date to  conduct its operations  in the ordinary  and usual course  of
business  consistent  with past  and current  practices,  to notify  Isolyser of
changes in the normal course of its business and to refrain from taking  certain
actions without the consent of Isolyser, including, among other matters, issuing
stock  (subject to  certain exceptions),  declaring dividends,  or entering into
transactions outside the ordinary course of business.
 
    Microtek and Isolyser have agreed in the Merger Agreement to indemnify after
the Effective  Date Microtek's  current and  former officers  and directors  for
claims made against such persons because they were a director, officer, employee
or  agent of Microtek or its subsidiaries  or serving at the request of Microtek
or any subsidiary as a director,  officer, employee or agent of another  entity;
provided,  however, Microtek and  Isolyser will have  no obligation to indemnify
such a person (a)  if a court determines  (and such determination becomes  final
and  non-appealable) that  the indemnification  is prohibited  by law  or (b) if
Isolyser asserts  that Microtek  breached a  representation or  warranty in  the
Merger  Agreement with respect to the  same matters for which indemnification is
being sought, except if such person proves that he
 
                                       36
<PAGE>
or she had no actual  knowledge of such breach  at the Effective Date.  Isolyser
will  not amend or repeal any provisions  of the Certificate of Incorporation or
Bylaws  of   Microtek  in   any  manner   which  would   adversely  affect   the
indemnification  provisions contained in  the Merger Agreement.  For a period of
two years  from  the  Effective  Date, Microtek  shall  maintain  directors  and
officers  liability insurance covering the directors and officers covered on the
date of the Merger  Agreement by Microtek's  directors' and officers'  liability
insurance   policy  or  cause  Isolyser's  directors'  and  officers'  liability
insurance policy  to  cover  such  persons, except  that  neither  Microtek  nor
Isolyser,  shall be required to expend in  premiums for such insurance an amount
greater than  the  rate paid  by  Microtek  for the  policy  period  immediately
preceding the date of execution of the Merger Agreement and except that Isolyser
shall  have no liability or obligation to  maintain such insurance to the extent
that any such policy is  not reasonably available on  the terms required by  the
Merger Agreement.
 
CERTAIN REGULATORY MATTERS
 
    Consummation  of  the Merger  is conditioned  upon  receipt by  Isolyser and
Microtek of such regulatory and other approvals as are required under applicable
law, including certain approvals from the Commission. Other than these approvals
and the  matters  described  below,  Isolyser  and  Microtek  know  of  no  such
regulatory or other approvals required by law.
 
    Under  the Hart-Scott-Rodino  Antitrust Improvements  Act of  1976 (the "HSR
Act"), certain acquisition transactions, including the proposed Merger, may  not
be  consummated unless  certain information  has been  furnished to  the Federal
Trade  Commission  (the  "FTC")  and  the  Antitrust  Division  of  the  Justice
Department  (the "Antitrust  Division") and certain  waiting period requirements
have expired or been  terminated. In accordance with  the HSR Act, Isolyser  and
Microtek  have  filed Notification  and Report  Forms and  certain supplementary
materials with the Antitrust Division and the FTC for review in connection  with
the  proposed Merger, and all waiting period requirements under the HSR Act have
expired.
 
POTENTIAL RESALES OF ISOLYSER SHARES RECEIVED IN THE MERGER
 
    The Isolyser Shares to be issued to Microtek stockholders in connection with
the Merger will  be freely  transferable under  the Securities  Act, except  for
shares  issued  to any  person who,  at the  time of  the Isolyser  and Microtek
Special Meetings, may be  deemed to be an  "affiliate" of Microtek, Isolyser  or
the Isolyser Subsidiary within the meaning of Rule 145 under the Securities Act.
In  general, affiliates of Microtek, Isolyser or the Isolyser Subsidiary include
any person or entity who controls, is  controlled by or is under common  control
with  Microtek,  Isolyser  or the  Isolyser  Subsidiary. Rule  145,  among other
things, imposes certain restrictions upon  the resale of securities received  by
affiliates in connection with certain reclassifications, mergers, consolidations
or  asset transfers.  The Isolyser  Shares received  by affiliates  of Microtek,
Isolyser or  the  Isolyser Subsidiary  in  the Merger  will  be subject  to  the
applicable resale limitations of Rule 145.
 
    Additionally,  consistent  with the  requirements of  a pooling-of-interests
transaction, affiliates  of  Isolyser  and  Microtek  will  be  restricted  from
disposing of any Isolyser Common Stock for the period beginning 30 days prior to
the  Effective Date  until the publication  of financial  statements by Isolyser
which include at  least 30  days of  post-Merger operating  results. The  Merger
Agreement  provides that Isolyser  shall receive a  written undertaking from the
directors, executive officers and certain  stockholders of Microtek not to  sell
any  Microtek Shares (and Isolyser Shares acquired in the Merger) owned directly
or indirectly by them until after the publication of these post-Merger financial
statements.
 
NASDAQ LISTING OF THE ISOLYSER SHARES
 
    Isolyser will  apply for  listing on  Nasdaq of  the Isolyser  Shares to  be
issued  in connection with the Merger and  upon the exercise of Microtek options
assumed by Isolyser pursuant to the  Merger Agreement. It is expected that  such
shares  shall be approved for listing on  Nasdaq, subject to notice of issuance.
See "-- Conditions to Merger."
 
                                       37
<PAGE>
ACCOUNTING TREATMENT
 
    Isolyser intends to  account for  the business combination  of Isolyser  and
Microtek  in  its financial  statements  by the  pooling-of-interests  method of
accounting. Receipt  by Isolyser  of  a letter  from the  independent  certified
public   accountants  for  Isolyser  confirming   the  appropriateness  of  this
accounting treatment is a condition precedent  to the Merger. Under this  method
of  accounting, as of the Effective Date, the assets and liabilities of Microtek
would be  added to  those of  Isolyser at  their recorded  book values  and  the
stockholders'  equity accounts  of Isolyser  and Microtek  would be  combined in
Isolyser's consolidated balance  sheet. Additionally, all  prior period  balance
sheets  of Isolyser would be restated and combined with those of Microtek in the
same manner. Under  the pooling-of-interests basis  of accounting, revenues  and
expenses  of both Isolyser and  Microtek for all periods  prior to the Effective
Date and for all periods thereafter  are combined and reported as operations  of
the  combined enterprises as if the Merger  had taken place prior to the periods
covered by such consolidated financial statements and to reflect the  accounting
policies of Isolyser. See "-- Conditions to Merger."
 
    The   unaudited  pro  forma  condensed  consolidated  financial  information
contained in this Joint Proxy Statement/Prospectus has been prepared using:  (i)
the pooling-of-interests basis of accounting to account for the Merger, and (ii)
the  purchase accounting basis to  account for Isolyser's completed acquisitions
of White Knight and SafeWaste and Microtek's completed acquisition of Medi-Plast
and Venodyne. Under the  purchase basis of  accounting, an acquiring  enterprise
allocates  the cost  of an  acquired enterprise to  the assets  acquired and the
liabilities assumed based upon their fair values as of the effective date of the
acquisition. The excess, if any, of the cost of the acquired enterprise over the
sum of the amounts assigned to  identifiable assets less liabilities assumed  is
treated  as  goodwill.  Financial  statements issued  after  consummation  of an
acquisition accounted for  as a  purchase would  reflect such  values and  prior
period  financial statements would not be  restated retroactively to reflect the
historical financial position or results of operations of the acquired  company.
See "Summary" and "Pro Forma Condensed Consolidated Financial Information."
 
    The  terms of  the outstanding  Microtek options  provide that  such options
shall become fully exercisable without regard to any vesting criteria  specified
in  such options upon  the occurrence of  the Effective Date.  Such vesting will
result  in  the  elimination  of  certain  performance-based  vesting   criteria
contained  in stock  options issued to  each of  Messrs. Vought and  Lee for the
purchase of 25,000 shares of Microtek Common Stock at an exercise price of $5.75
per share. Applicable accounting standards require that the elimination of  such
vesting criteria be accounted for as compensation expense by Microtek to Messrs.
Vought  and Lee in an amount equal  to the difference between the aggregate fair
market value of  the shares underlying  such stock options  as of the  Effective
Date  and the  aggregate exercise  price set forth  in such  stock options. Such
charges in excess of amounts previously recognized by Microtek through  February
29,  1996 will be  reflected on Isolyser's  consolidated statement of operations
for the period in which the  Effective Date occurs. Other extraordinary  charges
are expected to be recognized and reflected on Isolyser's consolidated statement
of  operations for the period in which  the Effective Date occurs. See "Isolyser
and Microtek Pro Forma Combined Financial Information."
 
CERTAIN FEDERAL INCOME TAX CONSEQUENCES
 
    It is a  condition to the  obligation of Microtek  to consummate the  Merger
that  Microtek receive an opinion from Arnall, Golden & Gregory, tax counsel for
Isolyser, to the effect that the Merger  will be treated for federal income  tax
purposes  as a reorganization within  the meaning of Section  368(a) of the Code
and no gain or loss will be recognized by a Microtek stockholder as a result  of
the Merger with respect to shares of Microtek Common Stock converted solely into
Isolyser  Common Stock. The effects  of any cash received  in lieu of fractional
share interests are discussed below.
 
    Assuming that certain representations  to be made  by Microtek and  Isolyser
are  true as  of the  Effective Date, Arnall,  Golden &  Gregory will  be of the
opinion that the Merger will qualify as a reorganization under the Code with the
consequences   set   forth   above.   The    opinion   will   be   subject    to
 
                                       38
<PAGE>
the  qualification  that  there exists  no  plan  or intention  by  the Microtek
stockholders to sell or otherwise dispose of fifty percent (50%) or more of  the
Isolyser  Common  Stock  received by  all  former Microtek  stockholders  in the
Merger. Assuming that  the Merger so  qualifies, the tax  basis of the  Isolyser
Shares received by Microtek stockholders in the Merger will be the same, in each
instance,  as  the tax  basis  of the  Microtek  Shares surrendered  in exchange
therefor, excluding  any  basis  allocable  to  fractional  share  interests  in
Isolyser  Common  Stock for  which cash  is received.  In addition,  the holding
period of the Isolyser  Shares received in the  Merger by Microtek  stockholders
will  include  the period  during which  the shares  of Microtek  surrendered in
exchange therefor were held, provided that such shares of Microtek Common  Stock
were held as capital assets at the Effective Date.
 
    Holders  of Microtek Common Stock who receive cash in the Merger as a result
of the rounding off of fractional share interests in Isolyser Common Stock  will
be  treated, in each instance, as having received the fractional share interests
and then as having  sold such interests  for the cash  received. This sale  will
result  in the  recognition of  gain or  loss for  federal income  tax purposes,
measured by the difference between the  amount of cash received and the  portion
of  the basis of the share of Microtek Common Stock allocable to such fractional
share interests. Such gain or loss will  be capital gain or loss, provided  that
such share of Microtek Common Stock was held as a capital asset at the Effective
Date,  and will  be long-term  capital gain  or loss  if such  share of Microtek
Common Stock has been held for more than one year.
 
    THE FOREGOING DISCUSSION IS  INTENDED ONLY AS A  SUMMARY OF CERTAIN  FEDERAL
INCOME  TAX CONSEQUENCES  OF THE MERGER  AND DOES  NOT PURPORT TO  BE A COMPLETE
ANALYSIS OR LISTING OF ALL POTENTIAL TAX EFFECTS RELEVANT TO A DECISION  WHETHER
TO  VOTE  IN  FAVOR  OF  APPROVAL AND  ADOPTION  OF  THE  MERGER  AGREEMENT. THE
DISCUSSION DOES  NOT ADDRESS  THE TAX  CONSEQUENCES THAT  MAY BE  RELEVANT TO  A
PARTICULAR  MICROTEK  STOCKHOLDER  SUBJECT TO  SPECIAL  TREATMENT  UNDER CERTAIN
FEDERAL INCOME  TAX  LAWS,  SUCH  AS DEALERS  IN  SECURITIES,  BANKS,  INSURANCE
COMPANIES,  TAX-EXEMPT ORGANIZATIONS, NON-UNITED STATES PERSONS AND STOCKHOLDERS
WHO ACQUIRED THEIR SHARES  AS COMPENSATION, NOR  ANY CONSEQUENCES ARISING  UNDER
THE LAWS OF ANY STATE, LOCALITY OR FOREIGN JURISDICTION. THE DISCUSSION IS BASED
UPON  THE CODE, TREASURY  REGULATIONS THEREUNDER AND  ADMINISTRATIVE RULINGS AND
COURT DECISIONS AS  OF THE  DATE HEREOF.  ALL OF  THE FOREGOING  ARE SUBJECT  TO
CHANGE  AND  ANY  SUCH  CHANGE  COULD AFFECT  THE  CONTINUING  VALIDITY  OF THIS
DISCUSSION. MICROTEK STOCKHOLDERS ARE  URGED TO CONSULT  THEIR OWN TAX  ADVISORS
CONCERNING  THE FEDERAL, STATE, LOCAL AND FOREIGN TAX CONSEQUENCES OF THE MERGER
TO THEM.
 
NO APPRAISAL RIGHTS
 
    Pursuant to Delaware  law, no holder  of record of  the Microtek Shares  who
objects  to the Merger shall have  appraisal or dissenters' rights in connection
with the Merger. Pursuant to Georgia law, no holder of record of Isolyser Common
Stock who objects  to the Merger  Proposal shall have  appraisal or  dissenters'
rights in connection with the Merger.
 
                                       39
<PAGE>
                             ISOLYSER AND MICROTEK
 
                    PRO FORMA COMBINED FINANCIAL INFORMATION
 
    The  following unaudited pro forma combined financial statements give effect
to the Merger of Isolyser and Microtek under the pooling of interests method  of
accounting.  The unaudited pro forma combined balance sheet as of March 31, 1996
gives effect to the Merger as though  it had been consummated on that date.  The
unaudited  pro forma  combined balance  sheet as  of March  31, 1996  also gives
effect to  Microtek's acquisition  of Venodyne  on  April 27,  1996 as  if  such
acquisition  had occurred on February 29, 1996. The unaudited pro forma combined
statements of operations for  the years ended December  31, 1993, 1994 and  1995
and for the three-months ended March 31, 1996 give effect to the Merger as if it
had occurred at the beginning of the earliest year presented. For the year ended
December  31, 1995, the  unaudited pro forma statement  of operations also gives
effect to Isolyser's acquisitions of SafeWaste on May 31, 1995 and White  Knight
effective  September  1,  1995  and  Microtek's  acquisitions  of  Medi-Plast on
November 30, 1995 and  Venodyne on April  27, 1996 as  if such acquisitions  had
occurred  at the beginning of Isolyser's and Microtek's fiscal years, January 1,
1995 and December 1,  1994, respectively. For the  three-months ended March  31,
1996,  the  unaudited pro  forma statement  of operations  also gives  effect to
Microtek's acquisition  of  Venodyne as  if  such acquisition  had  occurred  at
December  1, 1994. For purposes of  these unaudited pro forma combined financial
statements,  the  balance  sheet  and  statements  of  operations  data  combine
Microtek's  balance  sheet  as  of  February  29,  1996  and  its  statements of
operations for the years ended November  30, 1993, 1994 and 1995,  respectively,
as Microtek's fiscal year ends on November 30.
 
    The  unaudited combined pro forma financial statements have been prepared by
both Isolyser and  Microtek based upon  their respective consolidated  financial
statements and certain assumptions. Pro forma per share amounts are based on the
Exchange  Ratio  of 1.65  shares  of Isolyser  Common  Stock for  each  share of
Microtek Common Stock. The unaudited pro forma combined statements of operations
do not reflect estimated Merger expenses (estimated at approximately $2,750,000)
or any operating synergies or cost savings which may result from the Merger.  In
addition  to the  assumptions relating  to the  Merger, the  unaudited pro forma
combined statement of operations  for the year ended  December 31, 1995 and  for
the  three-months ended March 31, 1996  also includes assumptions related to the
amortization of intangibles, depreciation, financing costs, income taxes and the
issuance of common stock resulting from Isolyser's acquisitions of SafeWaste and
White Knight and  Microtek's acquisitions of  Medi-Plast and Venodyne  accounted
for using the purchase method of accounting. See "Isolyser -- Pro Forma Combined
Financial   Information"  and   "Microtek  --   Pro  Forma   Combined  Financial
Information."
 
    The unaudited pro forma combined financial statements also should be read in
conjunction with  the historical  consolidated  financial statements  and  notes
thereto  in Isolyser's and  Microtek's separate Annual Reports  on Form 10-K for
the year  ended December  31,  1995 and  November  30, 1995,  respectively,  and
Quarterly  Reports on Form  10-Q for the  three-months ended March  31, 1996 and
February  29,  1996,  respectively,   incorporated  by  reference  herein,   the
historical  financial  statements  of  SafeWaste and  White  Knight  included in
Isolyser's current reports  on Form 8-K  filed with the  Commission on June  15,
1995  and October 3,  1995, respectively, incorporated  by reference herein, and
the historical  financial  statements of  Medi-Plast  and Venodyne  included  in
Microtek's  Annual Report  on Form  10-K for the  year ended  November 30, 1995,
incorporated by reference herein.
 
    The pro forma  information is  not necessarily indicative  of the  operating
results  and financial position that would have been reported had the Merger and
the SafeWaste, White  Knight, Medi-Plast and  Venodyne acquisitions occurred  at
the  pro  forma dates  specified,  nor is  it  necessarily indicative  of future
results.
 
                                       40
<PAGE>
                             ISOLYSER AND MICROTEK
                   UNAUDITED COMBINED PRO FORMA BALANCE SHEET
                                 MARCH 31, 1996
 
                                     ASSETS
 
<TABLE>
<CAPTION>
                                                                              PRO FORMA
                                                                               MICROTEK
                                                                                 WITH            PRO FORMA             PRO FORMA
                                                           ISOLYSER            VENODYNE         ADJUSTMENTS            COMBINED
                                                         -------------       ------------       ------------         -------------
                                                                                      (IN THOUSANDS)
<S>                                                      <C>                 <C>                <C>                  <C>
Current assets:
  Cash and cash equivalents............................  $      45,755       $       667        $         3(2)       $     46,425
  Accounts receivable, net.............................         18,619             7,222                (89)(2)            25,691
                                                                                                        (61)(3)
  Inventories, net.....................................         38,551            11,905                 12(2)             50,468
  Prepaid inventories..................................            973                                                        973
  Deferred income taxes................................          2,393               208                                    2,601
  Prepaid expenses and other assets....................          2,194               544                                    2,738
                                                         -------------       ------------       ------------         -------------
    Total current assets...............................        108,485            20,546               (135)              128,896
                                                         -------------       ------------       ------------         -------------
Property and equipment, net............................         58,035             5,581                134(2)             63,750
Deposits on machinery and equipment....................          3,532                                                      3,532
Intangible assets, net.................................         37,102            26,382                240(2)             63,724
Investments in joint ventures..........................            404               100               (300)(2)               204
Other assets, net......................................            597                                                        597
                                                         -------------       ------------       ------------         -------------
    Total assets.......................................  $     208,155       $    52,609        $       (61)         $    260,703
                                                         -------------       ------------       ------------         -------------
                                                         -------------       ------------       ------------         -------------
 
                                               LIABILITIES AND SHAREHOLDERS' EQUITY
 
Current liabilities:
  Bank overdraft.......................................  $       1,889                                               $      1,889
  Accounts payable.....................................         12,455       $     2,887        $       (61)(3)            15,281
  Accrued compensation.................................          2,463               280                                    2,743
  Other accrued liabilities............................          1,531               890              2,750(5)              5,418
                                                                                                        247(4)
  Current portion of long term debt....................          1,513             2,500                                    4,013
                                                         -------------       ------------       ------------         -------------
    Total current liabilities..........................         19,851             6,557              2,936                29,344
                                                         -------------       ------------       ------------         -------------
Long term debt.........................................          9,899            23,959                                   33,858
Deferred income taxes..................................          3,728               231                                    3,959
Other liabilities......................................            270                                                        270
                                                         -------------       ------------       ------------         -------------
    Total liabilities..................................         33,748            30,747              2,936                67,431
                                                         -------------       ------------       ------------         -------------
Shareholders' equity:
  Common stock.........................................             31                48                (40)(6)                39
  Additional paid in capital...........................        181,202            20,214             (1,273)(6)           200,597
                                                                                                        454(4)
  Retained earnings (deficit)..........................         (4,429)            3,333             (2,750)(5)            (4,547)
                                                                                                       (701)(4)
  Unearned shares -- ESOP..............................                             (420)                                    (420)
                                                         -------------       ------------       ------------         -------------
                                                               176,804            23,175             (4,310)              195,669
  Less: shares held in treasury........................         (2,397)           (1,313)             1,313(6)             (2,397)
                                                         -------------       ------------       ------------         -------------
    Total shareholders' equity.........................        174,407            21,862             (2,997)              193,272
                                                         -------------       ------------       ------------         -------------
Total Liabilities and Shareholders' Equity.............  $     208,155       $    52,609        $       (61)         $    260,703
                                                         -------------       ------------       ------------         -------------
                                                         -------------       ------------       ------------         -------------
</TABLE>
 
                                       41
<PAGE>
                             ISOLYSER AND MICROTEK
              UNAUDITED PRO FORMA COMBINED STATEMENT OF OPERATIONS
                      FOR THE YEAR ENDED DECEMBER 31, 1993
 
<TABLE>
<CAPTION>
                                                                                                PRO FORMA            PRO FORMA
                                                           ISOLYSER           MICROTEK         ADJUSTMENTS            COMBINED
                                                         ------------       ------------       ------------         ------------
                                                                          (IN THOUSANDS, EXCEPT PER SHARE DATA)
<S>                                                      <C>                <C>                <C>                  <C>
Net sales..............................................  $     11,831       $     26,938                            $    38,769
Cost of goods sold.....................................         6,971             13,866                                 20,837
                                                         ------------       ------------       ------------         ------------
  Gross profit.........................................         4,860             13,072                                 17,932
                                                         ------------       ------------       ------------         ------------
Operating expenses:
  Selling and marketing expenses.......................         2,494              6,988                                  9,482
  General and administrative expenses..................         1,227              2,576                                  3,803
  Research and development.............................           587                333                                    920
  Amortization of intangibles..........................           291              1,067                                  1,358
                                                         ------------       ------------       ------------         ------------
    Total operating expenses...........................         4,599             10,964                                 15,563
                                                         ------------       ------------       ------------         ------------
Income from operations.................................           261              2,108                                  2,369
Interest income........................................           799                                                       799
Interest expense.......................................                             (348)                                  (348)
Other income...........................................                               22                                     22
                                                         ------------       ------------       ------------         ------------
Income before income tax provision and extraordinary
 item..................................................         1,060              1,782                                  2,842
Income tax provision...................................           424                775                                  1,199
                                                         ------------       ------------       ------------         ------------
Income before extraordinary item.......................  $        636       $      1,007                            $     1,643
                                                         ------------       ------------       ------------         ------------
                                                         ------------       ------------       ------------         ------------
Income before extraordinary item per common and common
 equivalent share......................................  $       0.04       $       0.20                            $      0.07
                                                         ------------       ------------                            ------------
                                                         ------------       ------------                            ------------
Weighted average number of common and common equivalent
 shares outstanding....................................        16,053              5,059             3,288(6)            24,400
                                                         ------------       ------------       ------------         ------------
                                                         ------------       ------------       ------------         ------------
</TABLE>
 
                                       42
<PAGE>
                             ISOLYSER AND MICROTEK
              UNAUDITED PRO FORMA COMBINED STATEMENT OF OPERATIONS
                      FOR THE YEAR ENDED DECEMBER 31, 1994
 
<TABLE>
<CAPTION>
                                                                                                PRO FORMA            PRO FORMA
                                                           ISOLYSER           MICROTEK         ADJUSTMENTS            COMBINED
                                                         ------------       ------------       ------------         ------------
                                                                          (IN THOUSANDS, EXCEPT PER SHARE DATA)
<S>                                                      <C>                <C>                <C>                  <C>
Net sales..............................................  $     46,625       $     26,894       $      (136)(3)      $    73,383
Cost of goods sold.....................................        35,117             14,947       $      (136)(3)           49,928
                                                         ------------       ------------       ------------         ------------
  Gross profit.........................................        11,508             11,947                                 23,455
                                                         ------------       ------------       ------------         ------------
Operating expenses:
  Selling and marketing expenses.......................         7,528              6,572                                 14,100
  General and administrative expenses..................         4,161              3,230                                  7,391
  Research and development.............................         1,045                201                                  1,246
  Amortization of intangibles..........................         1,103                402                                  1,505
  Restructuring charge.................................                              140                                    140
                                                         ------------       ------------       ------------         ------------
    Total operating expenses...........................        13,837             10,545                                 24,382
                                                         ------------       ------------       ------------         ------------
Income (loss) from operations..........................        (2,329)             1,402                                   (927)
Interest income........................................         1,356                                                     1,356
Interest expense.......................................          (321)              (373)                                  (694)
                                                         ------------       ------------       ------------         ------------
Income (loss) before income tax provision and
 cumulative effect of change in accounting principle...        (1,294)             1,029                                   (265)
Income tax provision...................................            11                444                                    455
                                                         ------------       ------------       ------------         ------------
Income (loss) before cumulative effect of change in
 accounting principle..................................  $     (1,305)      $        585       $                    $      (720)
                                                         ------------       ------------       ------------         ------------
                                                         ------------       ------------       ------------         ------------
Income (loss) before cumulative effect of change in
 accounting principle per common and common equivalent
 share.................................................  $      (0.11)      $       0.11                            $     (0.03)
                                                         ------------       ------------                            ------------
                                                         ------------       ------------                            ------------
Weighted average number of common and common equivalent
 shares outstanding....................................        18,684              5,058             3,288(6)            27,030
                                                         ------------       ------------       ------------         ------------
                                                         ------------       ------------       ------------         ------------
</TABLE>
 
                                       43
<PAGE>
                             ISOLYSER AND MICROTEK
              UNAUDITED PRO FORMA COMBINED STATEMENT OF OPERATIONS
                      FOR THE YEAR ENDED DECEMBER 31, 1995
 
<TABLE>
<CAPTION>
                                                                              PRO FORMA
                                                                               MICROTEK
                                                    PRO FORMA ISOLYSER           WITH
                                                    WITH SAFEWASTE AND        MEDI-PLAST         PRO FORMA            PRO FORMA
                                                       WHITE KNIGHT          AND VENODYNE       ADJUSTMENTS           COMBINED
                                                    ------------------       ------------       -----------         -------------
                                                                        (IN THOUSANDS, EXCEPT PER SHARE DATA)
<S>                                                 <C>                      <C>                <C>                 <C>
Net sales.........................................     $    113,179          $    39,164         $    (599)(3)      $     151,744
Cost of goods sold................................           86,678               20,267              (599)(3)            106,346
                                                         ----------          ------------       -----------         -------------
  Gross profit....................................           26,501               18,897                                   45,398
                                                         ----------          ------------       -----------         -------------
Operating expenses:
  Selling and marketing expenses..................           18,299                7,662                                   25,961
  General and administrative expenses.............            7,993                4,644               139(2)              12,776
  Research and development........................              959                  314                                    1,273
  Amortization of intangibles.....................            3,304                1,065                77(2)               4,446
                                                         ----------          ------------       -----------         -------------
    Total operating expenses......................           30,555               13,685               216                 44,456
                                                         ----------          ------------       -----------         -------------
Income (loss) from operations.....................           (4,054)               5,212              (216)                   942
Interest income...................................            2,050                   10                                    2,060
Interest expense..................................           (1,531)              (1,604)                                  (3,135)
Losses of joint ventures..........................             (214)                 (91)              216(2)                 (89)
Other income......................................                                     8                                        8
                                                         ----------          ------------       -----------         -------------
Income (loss) before income tax provision
 (benefit)........................................           (3,749)               3,535                                     (214)
Income tax provision (benefit)....................             (400)               1,365                                      965
                                                         ----------          ------------       -----------         -------------
Net income (loss).................................     $     (3,349)         $     2,170         $                  $      (1,179)
                                                         ----------          ------------       -----------         -------------
                                                         ----------          ------------       -----------         -------------
Net income (loss) per common and common equivalent
 share............................................     $      (0.13)         $      0.44                            $       (0.03)
                                                         ----------          ------------                           -------------
                                                         ----------          ------------                           -------------
Weighted average number of common and common
 equivalent shares outstanding....................           25,884                4,927             3,203(6)              34,014
                                                         ----------          ------------       -----------         -------------
                                                         ----------          ------------       -----------         -------------
</TABLE>
 
                                       44
<PAGE>
                             ISOLYSER AND MICROTEK
              UNAUDITED PRO FORMA COMBINED STATEMENT OF OPERATIONS
                   FOR THE THREE-MONTHS ENDED MARCH 31, 1996
 
<TABLE>
<CAPTION>
                                                                              PRO FORMA
                                                                               MICROTEK
                                                                                 WITH            PRO FORMA            PRO FORMA
                                                         ISOLYSER              VENODYNE         ADJUSTMENTS           COMBINED
                                                        ----------           ------------       -----------         -------------
                                                                        (IN THOUSANDS, EXCEPT PER SHARE DATA)
<S>                                                 <C>                      <C>                <C>                 <C>
Net sales.........................................     $        31,008       $    10,199         $    (154)(3)      $     41,053
Cost of goods sold................................              23,880             5,171              (154)(3)            28,897
                                                              --------       ------------       -----------         -------------
  Gross profit....................................               7,128             5,028                                  12,156
                                                              --------       ------------       -----------         -------------
Operating expenses:
  Selling and marketing expenses..................               4,963             1,874                                   6,837
  General and administrative expenses.............               2,049             1,164                64(2)              3,277
  Research and development........................                 297                34                                     331
  Amortization of intangibles.....................                 807               308                29(2)              1,144
                                                              --------       ------------       -----------         -------------
    Total operating expenses......................               8,116             3,380                93                11,589
                                                              --------       ------------       -----------         -------------
Income (loss) from operations.....................                (988)            1,648               (93)                  567
Interest income...................................                 641                                                       641
Interest expense..................................                (229)             (376)                                   (605)
Losses of joint ventures..........................                 (67)              (46)               93(2)                (20)
                                                              --------       ------------       -----------         -------------
Income (loss) before income tax provision
 (benefit)........................................                (643)            1,226                                     583
Income tax provision (benefit)....................                (266)              496                                     230
                                                              --------       ------------       -----------         -------------
Net income (loss).................................     $          (377)      $       730         $                  $        353
                                                              --------       ------------       -----------         -------------
                                                              --------       ------------       -----------         -------------
Net income (loss) per common and common equivalent
 share............................................     $         (0.01)      $      0.15                            $       0.01
                                                              --------       ------------                           -------------
                                                              --------       ------------                           -------------
Weighted average number of common and common
 equivalent shares outstanding....................              30,500             4,991             3,244(6)             38,735
                                                              --------       ------------       -----------         -------------
                                                              --------       ------------       -----------         -------------
</TABLE>
 
                                       45
<PAGE>
                             ISOLYSER AND MICROTEK
 
               NOTES TO PRO FORMA COMBINED FINANCIAL INFORMATION
 
(1)  The unaudited  pro forma combined  financial statements give  effect to the
    Merger of Isolyser  and Microtek under  the pooling of  interests method  of
    accounting. The unaudited pro forma combined statement of operations for the
    year ended December 31, 1995 also gives effect to Isolyser's acquisitions of
    SafeWaste  on May 31, 1995 and White  Knight effective September 1, 1995 and
    Microtek's acquisitions of Medi-Plast on  November 30, 1995 and Venodyne  on
    April  27, 1996, as  if such acquisitions  had occurred at  the beginning of
    Isolyser's and  Microtek's fiscal  years, January  1, 1995  and December  1,
    1994, respectively. The unaudited pro forma combined statement of operations
    for  the three months ended  March 31, 1996 also  gives effect to Microtek's
    acquisition of Venodyne as if such  acquisition had occurred at December  1,
    1994.  The unaudited pro  forma combined balance sheet  also gives effect to
    Microtek's acquisition of Venodyne on April 27, 1996 as if such  acquisition
    occurred  on February  29, 1996. For  purposes of these  unaudited pro forma
    combined financial statements, the balance sheet and statement of operations
    data combine  Microtek's balance  sheet  as of  February  29, 1996  and  its
    statements  of operations  for the years  ended November 30,  1993, 1994 and
    1995, and for  the three months  ended February 29,  1996, respectively,  as
    Microtek's fiscal year ends on November 30.
 
(2)  To  consolidate the  accounts  of the  joint  venture between  Isolyser and
    Microtek.
 
(3) To eliminate inter-company trade transactions and balances between  Isolyser
    and Microtek.
 
(4)  Reflects  additional compensation  expense of  $454,000, before  income tax
    benefit of  $173,000,  resulting from  the  accelerated vesting  of  certain
    performance  based stock options  held by certain  officers of Microtek. The
    related stock option agreements provide  for complete vesting upon a  change
    in  control  of  Microtek.  Also  reflects  currently  anticipated severance
    expense of $677,000, before income  tax benefit of $257,000, resulting  from
    the Merger.
 
(5)  Reflects estimated  Merger expenses  of $2,750,000.  These expenses include
    investment banking, legal, accounting and miscellaneous transaction costs of
    the Merger, and are  excluded from the pro  forma statements of  operations.
    Plans for the integration and consolidation of the companies' operations are
    currently being developed, but associated costs are not presently estimable.
    The  accounting  policies utilized  by Isolyser  and Microtek  are currently
    being studied  from a  conformity perspective;  however, the  impact of  any
    potential adjustment is not presently expected to be material.
 
(6) Reflects the assumed issuance of shares of Isolyser's $.001 par value common
    stock  in exchange for all outstanding common shares of Microtek as of March
    31, 1996,  utilizing the  Exchange Ratio  of 1.65-for-one,  and the  assumed
    cancellation  of Microtek common shares  held in treasury. Upon consummation
    of the Merger,  all rights to  shares of Microtek  common stock pursuant  to
    Microtek issued stock options shall immediately convert to equivalent rights
    with respect to Isolyser common stock utilizing the Exchange Ratio.
 
                                       46
<PAGE>
                                    ISOLYSER
 
                    PRO FORMA COMBINED FINANCIAL INFORMATION
 
    The  following unaudited pro forma combined  statement of operations for the
year ended December 31, 1995 gives effect to Isolyser's acquisition of SafeWaste
on May 31,  1995 and  of White  Knight effective September  1, 1995  as if  such
acquisitions  had occurred on  January 1, 1995. Both  of these acquisitions have
been accounted for using the purchase method of accounting.
 
    The pro forma  combined financial  statement should be  read in  conjunction
with  the historical consolidated  financial statements of  Isolyser included in
its  Annual  Report  on  Form  10-K  for  the  year  ended  December  31,  1995,
incorporated  by reference  herein, and  the historical  financial statements of
SafeWaste and White Knight  included in Isolyser's current  reports on Form  8-K
filed  with  the Commission  June 15,  1995, as  amended on  July 17,  1995, and
October 3, 1995, respectively, incorporated by reference herein.
 
    The pro forma information is not necessarily indicative of the results  that
would  have been reported had such transactions occurred on January 1, 1995, nor
is it necessarily indicative of future results.
 
              UNAUDITED PRO FORMA COMBINED STATEMENT OF OPERATIONS
 
                      FOR THE YEAR ENDED DECEMBER 31, 1995
 
<TABLE>
<CAPTION>
                                                                      INTER-COMPANY        PRO FORMA      PRO FORMA
                      ISOLYSER   SAFEWASTE (1)   WHITE KNIGHT (1)   ELIMINATIONS (2)    ADJUSTMENTS (3)   COMBINED
                      --------   -------------   ----------------   -----------------   ---------------   ---------
                                                  (IN THOUSANDS, EXCEPT PER SHARE DATA)
<S>                   <C>        <C>             <C>                <C>                 <C>               <C>
Net sales...........  $ 75,414       $ 260           $38,590             $(1,085)                         $113,179
Cost of goods
 sold...............    59,276         224            28,218              (1,085)           $    45(4)      86,678
                      --------      ------          --------             -------            -------       ---------
  Gross profit......    16,138          36            10,372                                    (45)        26,501
                      --------      ------          --------             -------            -------       ---------
Operating expenses:
  Selling and
   marketing
   expenses.........    12,763          67             5,469                                                18,299
  General and
   administrative
   expenses.........     6,038         187             2,019                                   (251)(5)      7,993
  Research and
   development......       959                                                                                 959
  Amortization of
   intangibles......     1,901          10                85                                  1,308(6)       3,304
                      --------      ------          --------             -------            -------       ---------
    Total operating
     expenses.......    21,661         264             7,573                                  1,057         30,555
                      --------      ------          --------             -------            -------       ---------
Income (loss) from
 operations.........    (5,523)       (228)            2,799                                 (1,102)        (4,054)
Interest income.....     3,205           3                                                   (1,158)(7)      2,050
Interest expense....      (830)         (3)           (1,153)                                   455(8)      (1,531)
Equity in losses of
 joint ventures.....      (169)        (28)                                                     (17)(9)       (214)
                      --------      ------          --------             -------            -------       ---------
Income (loss) before
 income tax
 provision
 (benefit)..........    (3,317)       (256)            1,646                                 (1,822)        (3,749)
Income tax provision
 (benefit)..........      (465)                          632                                   (567)(10)      (400)
                      --------      ------          --------             -------            -------       ---------
Net income (loss)...  $ (2,852)      $(256)          $ 1,014             $                  $(1,255)      $ (3,349)
                      --------      ------          --------             -------            -------       ---------
                      --------      ------          --------             -------            -------       ---------
Net loss per common
 and common
 equivalent share...  $   (.11)                                                                           $   (.13)
                      --------                                                                            ---------
                      --------                                                                            ---------
Weighted average
 number of common
 and common
 equivalent shares
 outstanding........    25,575                                                                              25,884(11)
                      --------                                                                            ---------
                      --------                                                                            ---------
</TABLE>
 
                                       47
<PAGE>
                                    ISOLYSER
          NOTES TO UNAUDITED PRO FORMA COMBINED FINANCIAL INFORMATION
 
 (1) Reflects for  the year ended  December 31, 1995,  the historical  operating
    results  of SafeWaste through May 31,  1995, and White Knight through August
    31, 1995.
 
 (2) Eliminates inter-company sales by SafeWaste and White Knight to Isolyser.
 
 (3) Effective September 1, 1995,  Isolyser acquired White Knight. The  purchase
    price  of White Knight included  the payment of $22,500,000  in cash and the
    issuance of $7,000,000 in Isolyser Common Stock to the shareholders of White
    Knight, and the payment  of approximately $1,388,000  in expenses. The  cash
    portion  of  the purchase  price  is also  subject  to certain  closing date
    adjustments, which Isolyser expects to resolve in 1996.
 
    Based on a  purchase price  allocation, White  Knight's historical  accounts
    were  adjusted to reflect  (i) a $1,468,000 increase  in inventories, (ii) a
    $2,943,000 increase in property and equipment, (iii) a $21,512,000  increase
    in  intangible assets, (iv) a net $2,592,000 increase in deferred income tax
    liabilities, resulting from the fact that the tax basis of the acquired  net
    assets  of White Knight will not be adjusted as a result of the acquisition,
    and (iv)  a net  $874,000  increase in  other liabilities.  The  $21,512,000
    adjustment  to  intangible  assets  consisted  of  $4,124,000  allocated  to
    customer lists and  $17,388,000 allocated  to goodwill.  Customer lists  and
    goodwill  are being amortized  using the straight-line method  over 7 and 20
    years, respectively.
 
    Through  borrowings  under  its  credit  facility  and  from  existing  cash
    balances,   Isolyser   repaid  $13,455,000   of  White   Knight's  long-term
    indebtedness, including  $9,276,000 of  revolving credit  borrowings from  a
    bank and $4,179,000 of subordinated notes payable.
 
 (4)  Reflects an increase in  depreciation expense as a  result of the purchase
    price adjustment to property and equipment.
 
 (5) Reflects the  elimination of  salaries and  benefits paid  to employees  of
    White Knight who were terminated and not replaced.
 
 (6) Reflects an increase in amortization expense as a result of the acquisition
    of  SafeWaste and  White Knight. Amortization  of goodwill  arising from the
    SafeWaste  and  White  Knight  acquisitions   is  over  10  and  20   years,
    respectively. Amortization of customer lists is over 5 to 7 years.
 
 (7)  Reflects a net  reduction in interest income  on cash equivalents assuming
    the acquisitions  had  occurred  on  January  1,  1995  and  that  the  cash
    equivalents had been used to fund the acquisitions.
 
 (8)  Reflects a reduction  in interest expense  for approximately $9,276,000 of
    White Knight indebtedness refinanced  under Isolyser's credit facilities  at
    lower effective interest rates.
 
 (9)  Reflects  an additional  expense for  the  amortization of  the difference
    between the value assigned to SafeWaste's investment in a joint venture over
    its share of the underlying equity. This difference is being amortized  over
    5 years.
 
(10)  Adjusts income tax benefit  to reflect the pro  forma effect on income tax
    benefit resulting from the  acquisition of SafeWaste  and White Knight.  The
    pro  forma effective tax  rate differs from the  federal and state statutory
    tax rates due to non-deductible  goodwill amortization expense arising  from
    Isolyser's acquisitions.
 
(11)  Weighted  average common  shares  outstanding is  calculated  assuming the
    acquisitions of SafeWaste and White Knight occurred on January 1, 1995.
 
                                       48
<PAGE>
                                    MICROTEK
                    PRO FORMA COMBINED FINANCIAL INFORMATION
 
    The following unaudited pro forma combined balance sheet as of February  29,
1996  gives effect to  Microtek's April 27,  1996 acquisition of  Venodyne as if
such acquisition had occurred on February 29, 1996. The following unaudited  pro
forma combined statements of operations for the year ended November 30, 1995 and
for  the  three-months  ended  February  29,  1996  gives  effect  to Microtek's
acquisitions of Venodyne on April 27,  1996 and Medi-Plast on November 30,  1995
as  if such  acquisitions had occurred  on December 1,  1994. These acquisitions
have been accounted for using the purchase method of accounting.
 
    The pro forma combined  financial statements should  be read in  conjunction
with  the  historical  consolidated  financial statements  of  Microtek  and the
historical  financial  statements  of   Medi-Plast  and  Venodyne  included   in
Microtek's  Annual Report  on Form  10-K for the  year ended  November 30, 1995,
incorporated by reference herein.
 
    The pro  forma combined  information is  not necessarily  indicative of  the
results  that would have been reported had  such transaction occurred on the pro
forma dates specified, nor is it necessarily indicative of future results.
 
                                       49
<PAGE>
                                    MICROTEK
                   UNAUDITED COMBINED PRO FORMA BALANCE SHEET
                               FEBRUARY 29, 1996
 
                                     ASSETS
 
<TABLE>
<CAPTION>
                                                                                         PRO FORMA      PRO FORMA
                                                            MICROTEK   VENODYNE (1)   ADJUSTMENTS (2)   COMBINED
                                                            ---------  -------------  ---------------  -----------
                                                                                (IN THOUSANDS)
<S>                                                         <C>        <C>            <C>              <C>
Current assets:
  Cash....................................................  $     667                                   $     667
  Accounts receivable, net................................      6,269    $     953                          7,222
  Inventories, net........................................     11,595          310                         11,905
  Deferred income taxes...................................        208                                         208
  Prepaid expenses and other assets.......................        522           22                            544
                                                            ---------  -------------                   -----------
    Total current assets..................................     19,261        1,285                         20,546
                                                            ---------  -------------                   -----------
Property and equipment, net...............................      5,394          187                          5,581
Intangible assets, net....................................     21,904          180       $   4,298         26,382
Investment in joint venture...............................        100                                         100
                                                            ---------  -------------       -------     -----------
    Total assets..........................................  $  46,659    $   1,652       $   4,298      $  52,609
                                                            ---------  -------------       -------     -----------
                                                            ---------  -------------       -------     -----------
 
                                       LIABILITIES AND SHAREHOLDERS' EQUITY
 
Current liabilities:
  Accounts payable........................................  $   2,747    $     140                      $   2,887
  Accrued compensation....................................        280                                         280
  Other accrued liabilities...............................        830           60                            890
  Current portion of long term debt.......................      2,500                                       2,500
                                                            ---------  -------------                   -----------
    Total current liabilities.............................      6,357          200                          6,557
Long term debt............................................     18,209                    $   5,750         23,959
Deferred income taxes.....................................        231                                         231
                                                            ---------  -------------       -------     -----------
    Total liabilities.....................................     24,797          200           5,750         30,747
Shareholders' equity:
  Common stock............................................         48                                          48
  Additional paid in capital..............................     20,214                                      20,214
  Retained earnings.......................................      3,333                                       3,333
  Unearned shares -- ESOP.................................       (420)                                       (420)
  Parent's equity in division.............................                   1,452          (1,452)             0
                                                            ---------  -------------       -------     -----------
                                                               23,175        1,452          (1,452)        23,175
  Less: shares held in treasury...........................     (1,313)                                     (1,313)
                                                            ---------  -------------       -------     -----------
    Total shareholders' equity............................     21,862        1,452          (1,452)        21,862
                                                            ---------  -------------       -------     -----------
TOTAL LIABILITIES AND SHAREHOLDERS' EQUITY................  $  46,659    $   1,652       $   4,298      $  52,609
                                                            ---------  -------------       -------     -----------
                                                            ---------  -------------       -------     -----------
</TABLE>
 
                                       50
<PAGE>
                                    MICROTEK
              UNAUDITED PRO FORMA COMBINED STATEMENT OF OPERATIONS
 
                      FOR THE YEAR ENDED NOVEMBER 30, 1995
 
<TABLE>
<CAPTION>
                                                                                                     PRO FORMA    PRO FORMA
                                                         MICROTEK   MEDI-PLAST (1)   VENODYNE (1)   ADJUSTMENTS   COMBINED
                                                         --------   --------------   ------------   -----------   ---------
                                                                       (IN THOUSANDS, EXCEPT PER SHARE DATA)
<S>                                                      <C>        <C>              <C>            <C>           <C>
Net sales..............................................  $ 30,059       $5,144          $3,961                     $39,164
Cost of goods sold.....................................    16,276        2,780           1,594         $(383)(3)    20,267
                                                         --------      -------       ------------   -----------   ---------
  Gross profit.........................................    13,783        2,364           2,367           383        18,897
                                                         --------      -------       ------------   -----------   ---------
Operating expenses:
  Selling and marketing expenses.......................     5,471        1,377           1,611          (547)(4)     7,662
                                                                                                        (250)(5)
  General and administrative expenses..................     3,326          807             629          (118)(3)     4,644
  Research and development.............................       168                          146                         314
  Amortization of intangibles..........................       433                                        632(6)      1,065
                                                         --------      -------       ------------   -----------   ---------
    Total operating expenses...........................     9,398        2,184           2,386          (283)       13,685
                                                         --------      -------       ------------   -----------   ---------
Income (loss) from operations..........................     4,385          180             (19)          666         5,212
Interest income........................................                                     10                          10
Interest expense.......................................      (549)         (57)                         (998)(7)    (1,604)
Losses of joint venture................................       (91)                                                     (91)
Other income...........................................         8                                                        8
                                                         --------      -------       ------------   -----------   ---------
Income (loss) before income tax provision (benefit)....     3,753          123              (9)         (332)        3,535
Income tax provision (benefit).........................     1,445                           (3)          (77)(8)     1,365
                                                         --------      -------       ------------   -----------   ---------
Net income (loss)......................................  $  2,308       $  123          $   (6)        $(255)      $ 2,170
                                                         --------      -------       ------------   -----------   ---------
                                                         --------      -------       ------------   -----------   ---------
Net income per common and common equivalent share......  $   0.47                                                  $  0.44
                                                         --------                                                 ---------
                                                         --------                                                 ---------
Weighted average number of common and common equivalent
 shares outstanding....................................     4,927                                                    4,927
                                                         --------                                                 ---------
                                                         --------                                                 ---------
</TABLE>
 
                                       51
<PAGE>
                                    MICROTEK
              UNAUDITED PRO FORMA COMBINED STATEMENT OF OPERATIONS
 
                  FOR THE THREE MONTHS ENDED FEBRUARY 29, 1996
 
<TABLE>
<CAPTION>
                                                                                                 PRO FORMA           PRO FORMA
                                                           MICROTEK          VENODYNE (1)        ADJUSTMENTS          COMBINED
                                                         ------------       --------------       ----------         ------------
                                                                          (IN THOUSANDS, EXCEPT PER SHARE DATA)
<S>                                                      <C>                <C>                  <C>                <C>
Net sales..............................................  $     9,067          $    1,132                            $    10,199
Cost of goods sold.....................................        4,715                 456                                  5,171
                                                         ------------            -------                            ------------
  Gross profit.........................................        4,352                 676                                  5,028
                                                         ------------            -------                            ------------
Operating expenses:
  Selling and marketing expenses.......................        1,460                 469          $    (55)(5)            1,874
  General and administrative expenses..................        1,040                 124                                  1,164
  Research and development.............................                               34                                     34
  Amortization of intangibles..........................          265                                    43(6)               308
                                                         ------------            -------               ---          ------------
    Total operating expenses...........................        2,765                 627               (12)               3,380
                                                         ------------            -------               ---          ------------
Income from operations.................................        1,587                  49                12                1,648
Interest expense.......................................         (316)                                  (60)(7)             (376)
Losses of joint venture................................          (46)                                                       (46)
                                                         ------------            -------               ---          ------------
Income (loss) before income tax provision..............        1,225                  49               (48)               1,226
Income tax provision (benefit).........................          495                  19               (18)(8)              496
                                                         ------------            -------               ---          ------------
Net income (loss)......................................  $       730          $       30          $    (30)         $       730
                                                         ------------            -------               ---          ------------
                                                         ------------            -------               ---          ------------
Net income per common and common equivalent share......  $      0.15                                                $      0.15
                                                         ------------                                               ------------
                                                         ------------                                               ------------
Weighted average number of common and common equivalent
 shares outstanding....................................        4,991                                                      4,991
                                                         ------------                                               ------------
                                                         ------------                                               ------------
</TABLE>
 
                                       52
<PAGE>
                                    MICROTEK
          NOTES TO UNAUDITED PRO FORMA COMBINED FINANCIAL INFORMATION
 
(1) Reflects  the historical  operating  results of  Medi-Plast for  the  twelve
    months  ended October 30, 1995, the  historical balance sheet of Venodyne as
    of February 24, 1996  and the historical operating  results of Venodyne  for
    the  year ended November  30, 1995 and  the three months  ended February 24,
    1996.
 
(2) On April  27, 1996, Microtek  purchased Venodyne through  the issuance of  a
    $5.75  million  note  payable. The  purchase  price  may be  increased  by a
    contingent payment (not to exceed $1.0 million) based upon the future  gross
    margin  from  the  Company's sale  of  Venodyne products.  Goodwill  of $4.3
    million recorded  in conjunction  with the  acquisition is  being  amortized
    using the straight-line method over 25 years.
 
(3)  Reflects  a  reduction in  rent  expense  as a  result  of  new contractual
    arrangements for facilities leased from the previous owners of Medi-Plast.
 
(4) Reflects a reduction in compensation  expense as a result of new  employment
    contracts  entered into  with certain  Medi-Plast employees  on November 30,
    1995.
 
(5) Reflects  the  elimination of  sales  commissions associated  with  a  sales
    commission  agreement which was terminated  in conjunction with the Venodyne
    acquisition.
 
(6)  Reflects  an  increase  in  amortization   expense  as  a  result  of   the
    acquisitions.  Amortization  of  goodwill arising  from  the  Medi-Plast and
    Venodyne acquisitions is being amortized over 25 years.
 
(7) Reflects an  increase in  interest expense  associated with  debt issued  in
    conjunction with the acquisitions.
 
(8)  Adjusts income tax  expense to reflect  the pro forma  effect on income tax
    expense resulting from the acquisitions, and to record income tax expense on
    the pre-tax earnings  of Medi-Plast. Prior  to the acquisitions,  Medi-Plast
    was  an S Corporation and  accordingly was not subject  to federal and state
    income tax.
 
                                       53
<PAGE>
                  COMPARATIVE RIGHTS OF ISOLYSER SHAREHOLDERS
                           AND MICROTEK STOCKHOLDERS
 
GENERAL
 
    If  the Merger is consummated, holders  of Microtek Common Stock will become
holders of  Isolyser  Common Stock,  and  the  rights of  such  former  Microtek
shareholders  will be governed  by the laws of  the State of  Georgia and by the
Isolyser Articles  of  Incorporation,  as amended  (the  "Isolyser  Articles  of
Incorporation"),  and the Amended and Restated Bylaws of Isolyser (the "Isolyser
Bylaws"). The  rights  of  Isolyser  shareholders  under  the  Georgia  Business
Corporation  Code  ("GBCC"),  the  Isolyser Articles  of  Incorporation  and the
Isolyser  Bylaws  differ  in  certain  respects  from  the  rights  of  Microtek
stockholders  under  the DGCL,  the Microtek  Certificate of  Incorporation (the
"Microtek Certificate of Incorporation") and the Amended and Restated Bylaws  of
Microtek  (the "Microtek Bylaws").  Certain of these  differences are summarized
below. This summary is qualified in its  entirety by reference to the full  text
of  such documents. In addition, the following  summary does not purport to be a
complete statement  of  the rights  of  Isolyser shareholders  under  applicable
Georgia  law  as  compared  with  the  rights  of  Microtek  stockholders  under
applicable Delaware Law. This summary is qualified in its entirety by  reference
to the DGCL and the GBCC.
 
AUTHORIZED CAPITAL STOCK
 
    Isolyser  is authorized to issue up to 100,000,000 shares of Isolyser Common
Stock and  up  to  10,000,000  shares of  Isolyser  Preferred  Stock,  of  which
31,072,545  shares of Isolyser Common Stock  and no shares of Isolyser Preferred
Stock were issued and outstanding on July  8, 1996. As of July 8, 1996,  319,544
shares  of Isolyser Common Stock were held  in treasury. The holders of Isolyser
Common Stock are entitled to  one vote per share on  all matters submitted to  a
vote  of stockholders. Subject to the rights  of any holders of Preferred Stock,
the holders of  shares of  Isolyser Common Stock  are entitled  to receive  such
dividends  as may be declared from time to time by Isolyser's Board of Directors
and are  entitled to  share ratably  in  all assets  of Isolyser  available  for
distribution   to  shareholders  upon  liquidation.  The  Isolyser  Articles  of
Incorporation  authorizes  Isolyser's  Board   of  Directors,  without   further
stockholder approval, to issue Isolyser Preferred Stock and to fix, with respect
to  any  series of  Isolyser  Preferred Stock,  the  dividend rights  and terms,
conversion rights,  voting  rights,  redemption rights  and  terms,  liquidation
preferences,  sinking  funds  and  other  rights,  preferences,  privileges  and
restrictions applicable to each series of Isolyser Preferred Stock issued.
 
    Notwithstanding the foregoing, pursuant to Isolyser's acquisition of MedSurg
Industries, Inc. in December, 1993, certain shareholders of Isolyser holding  in
the aggregate approximately 20% of the outstanding Isolyser Common Stock entered
into  a voting  agreement with MedInvest  Enterprises, Inc.  providing that they
would vote their shares  in favor of Michael  Sahady's election to the  Isolyser
Board  of Directors for  so long as  Mr. Sahady remains  an executive officer of
Isolyser. Mr. Sahady resigned as an  executive officer and director of  Isolyser
on May 24, 1996, and such voting agreement has accordingly expired.
 
    Microtek  is authorized to issue up  to 15,000,000 shares of Microtek Common
Stock and up to 1,705,290 shares of Microtek Preferred Stock, of which 4,680,585
shares of Microtek Common Stock and  no shares of Microtek Preferred Stock  were
issued  and outstanding on July  8, 1996. Of the  authorized shares of Preferred
Stock, 705,290 shares are classified  as Redeemable Convertible Preferred  Stock
with  no par  value. The  remaining 1,000,000 shares  of Preferred  Stock may be
issued from time to time in one or more series. Each such series has such rights
as shall be stated in the resolutions providing for the issuance of such  series
of  Preferred Stock by  the Board of  Directors. The holders  of Microtek Common
Stock are entitled  to one  vote per  share on  all matters  to be  voted on  by
Microtek shareholders generally. The holders of Microtek Preferred stock are not
entitled  to  receive  dividends  unless  otherwise  provided  by  the  Board of
Directors. The holders  of Microtek Common  Stock are entitled  to receive  such
dividends  as may be declared from time to time by Microtek's Board of Directors
and are  entitled to  share ratably  in  all assets  of Microtek  available  for
distribution  to stockholders  upon liquidation,  subject to  the rights  of any
holders of Microtek Preferred Stock. Except
 
                                       54
<PAGE>
as otherwise  required  by  the  DGCL or  resolutions  of  Microtek's  Board  of
Directors  authorizing the issuance of any class or series of Microtek Preferred
Stock, all rights and all voting power  is vested exclusively in the holders  of
Microtek Common Stock.
 
ANTI-TAKEOVER PROTECTION
 
    The  GBCC generally requires the affirmative vote of a majority of all votes
entitled to be cast on the matter, voting as a single group, to approve  mergers
and  share exchanges. Shareholders of the surviving corporation need not approve
a merger if (i) the articles of incorporation of the surviving corporation  will
not  differ from its  articles before the  merger, (ii) each  shareholder of the
surviving corporation  whose  shares  were outstanding  immediately  before  the
effective  date  of the  merger will  hold the  same number  and type  of shares
immediately  after  the  merger,  and  (iii)  the  number  and  kind  of  shares
outstanding  immediately after  the merger, plus  the number and  kind of shares
issuable as a result of the merger, do  not exceed the total number and kind  of
shares  of the surviving corporation authorized by its articles of incorporation
immediately before the  merger. Neither the  Isolyser Articles of  Incorporation
nor  the  Isolyser  Bylaws contain  a  provision  which alters  the  GBCC voting
requirements with respect to mergers.
 
    Under the DGCL, a merger or consolidation generally must be approved by  the
affirmative  vote of the holders of a  majority of all of the outstanding shares
of each constituent corporation. Stockholders of the surviving corporation  need
not  authorize a merger  if: (i) the agreement  of merger does  not amend in any
respect the certificate of incorporation of the surviving corporation, (ii) each
share of stock of the surviving corporation outstanding immediately prior to the
effective date of the merger is to be an identical outstanding or treasury share
of the surviving corporation after the  effective date of the merger, and  (iii)
either  no shares of  common stock of  the surviving corporation  and no shares,
securities or  obligations convertible  into  such stock  are  to be  issued  or
delivered  under the plan  of merger, or  the authorized unissued  shares or the
treasury shares of  common stock of  the surviving corporation  to be issued  or
delivered under the plan of merger plus those initially issuable upon conversion
of  any other shares, securities or obligations  to be issued or delivered under
this plan do  not exceed  20% of  the shares of  common stock  of the  surviving
corporation  outstanding immediately prior to the  effective date of the merger.
Neither the Microtek Certificate Incorporation nor the Microtek Bylaws contain a
provision which alters the DGCL voting requirements with respect to mergers.
 
    The provision of the GBCC concerning "Business Combinations with  Interested
Shareholders"   (the  "Business  Combinations  Provision")  generally  prohibits
certain "resident domestic  (Georgia) corporations" from  entering into  certain
business  combination transactions with  any "interested shareholder" (generally
defined  as  any  person  other   than  the  corporation  or  its   subsidiaries
beneficially owning at least 10% of the voting stock of the corporation), unless
(a)  the corporation's board  of directors approves  the business combination or
the  transaction  that  resulted  in  the  interested  shareholder  becoming  an
interested  shareholder prior to  the date the  interested shareholder became an
interested shareholder; (b) the interested  shareholder acquired 90% or more  of
the  outstanding  voting stock  of the  corporation  (excluding shares  owned by
Isolyser's officers, directors,  affiliates, subsidiaries  and certain  employee
stock  plans)  as part  of  the transaction  in  which it  became  an interested
shareholder; or  (c)  after  the  date  the  interested  shareholder  became  an
interested  shareholder, it acquired 90% or more of the outstanding voting stock
of the corporation  (excluding shares owned  by Isolyser's officers,  directors,
affiliates, subsidiaries and certain employee stock plans) and a majority of the
remaining  outstanding  voting  stock  (excluding  shares  owned  by  Isolyser's
officers, directors, affiliates, subsidiaries and certain employee stock  plans)
approved  the business combination. A  Georgia corporation's bylaws must specify
that all  requirements  of the  Business  Combinations Provision  apply  to  the
corporation  in  order for  the Business  Combinations  Provision to  apply. The
Isolyser Bylaws do contain a provision  electing to be governed by the  Business
Combinations Provision.
 
                                       55
<PAGE>
    The GBCC also contains a provision concerning "Fair Price Requirements" (the
"Fair   Price  Provision")  which  imposes  certain  requirements  on  "business
combinations" of a  Georgia corporation with  any person who  is an  "interested
shareholder"  of  that corporation.  Under  the Fair  Price  Provision, business
combinations with  interested  shareholders  must meet  one  of  three  criteria
designed  to  protect the  minority shareholders:  (i)  the transaction  must be
unanimously approved by the "continuing directors" of the corporation (generally
directors who served prior to the  time the interested shareholder acquired  10%
ownership and who are unaffiliated with the interested shareholder); or (ii) the
transaction  must be  approved by two-thirds  of the continuing  directors and a
majority of shares held by  shareholders other than the interested  shareholder;
or (iii) the terms of the transactions must meet specified fair pricing criteria
and  certain other tests.  A Georgia corporation's bylaws  must specify that all
requirements of the Fair Price Provision  apply to the corporation in order  for
the  Fair Price Provision to  apply. The Isolyser Bylaws  do contain a provision
electing to be governed by the Fair Price Provision.
 
    In addition to  the DGCL's general  requirements, Section 203  of the  DGCL,
"Business  Combinations with  Interested Stockholders,"  prohibits a corporation
that does not  opt out  of its provisions  from entering  into certain  business
combination  transactions with  "interested stockholders"  (generally defined to
include persons beneficially owning 15% or more of the corporation's outstanding
capital stock) unless certain supermajority votes are obtained. Microtek has not
opted out of Section 203 in its Certificate of Incorporation and consequently is
subject to the restrictions contained  in Section 203. Microtek has  represented
to  Isolyser that the provisions  of Section 203 are  inapplicable to the Merger
and the transactions contemplated by the Merger Agreement.
 
APPRAISAL RIGHTS
 
    The GBCC grants shareholders the right to dissent and receive payment of the
fair value of their shares in the event of certain amendments or changes to  the
articles  of incorporation adversely affecting their shares, or certain business
transactions, including certain mergers.  This right is  not available when  the
affected  shares are listed on a national  securities exchange or held of record
by more than 2,000  shareholders unless (a) the  articles of incorporation or  a
resolution   of  the  board  of  directors  approving  the  transaction  provide
otherwise, or (b) in  a plan of  merger or share exchange,  the holders of  such
shares  are  required to  accept  anything other  than  shares of  the surviving
corporation or another publicly held corporation, except for payments in lieu of
fractional shares. The  Isolyser Articles  of Incorporation do  not modify  this
limitation on dissenters' appraisal rights.
 
    Under  the DGCL, stockholders have dissenters'  rights similar to the rights
of shareholders of Georgia corporations described above. In addition, under  the
DGCL,  stockholders of corporations being acquired pursuant to a merger have the
right to serve  upon the  corporation a written  demand for  appraisal of  their
shares  when the stockholders receive any form of consideration for their shares
other than (a)  shares of  the surviving corporation,  (b) shares  of any  other
corporation  listed on a national securities exchange  or held of record by more
than 2,000  shareholders,  or (c)  cash  in lieu  of  fractional shares  or  any
combination  thereof.  Stockholders  who  perfect  their  appraisal  rights  are
entitled to receive cash from the corporation equal to the value of their shares
as established by judicial appraisal.  Corporations may enlarge these  statutory
rights  by including in their certificate  of incorporation a provision allowing
appraisal rights  in  any merger  in  which  the corporation  is  a  constituent
corporation.  The Microtek  Certificate of  Incorporation contains  no provision
enlarging such appraisal rights.
 
AMENDMENTS TO CERTIFICATE OR ARTICLES OF INCORPORATION
 
    Under the GBCC, the board of  directors may adopt certain amendments to  the
articles of incorporation, including, among others, amendments to (a) delete the
names  and  addresses  of the  initial  directors, initial  registered  agent or
registered office, (b) change  each issued and unissued  authorized share of  an
outstanding  class  of  stock into  a  greater  number of  whole  shares  if the
corporation has only shares of that class outstanding, (c) change the  corporate
name, (d) extend the corporation's duration if it was incorporated at a time the
law required limited duration, or (e) change
 
                                       56
<PAGE>
or  eliminate the par value of each  issued and unissued share of an outstanding
class if the corporation  has only shares of  that class outstanding. All  other
amendments must be approved by the board of directors and by the shareholders by
a  majority of  the votes entitled  to be cast  on the amendment  by each voting
group entitled to vote on the amendment, with each class voting separately.  The
Isolyser Articles of Incorporation do not modify this voting requirement.
 
    The  DGCL permits a corporation to amend its certificate of incorporation so
long as the amended certificate of incorporation contains only provisions  which
would be lawful and proper to insert in an original certificate of incorporation
filed  at the time the amendment is filed. Without limiting the general power of
amendment, the DGCL specifically allows  a corporation to amend its  certificate
of  incorporation so as to (a) change  its corporate name, (b) change the nature
of its business or its corporate powers and purposes, (c) increase, decrease  or
reclassify  its authorized  capital stock,  (d) cancel  or otherwise  affect the
right of the holders of the shares  of any class to receive accrued,  undeclared
dividends,  (e) create a new  class of stock, or (f)  change the duration of the
corporate charter. All amendments must be approved by the board of directors and
the stockholders by the affirmative vote of a majority of the outstanding  stock
entitled  to vote thereon, and a majority of the outstanding stock of each class
entitled to vote  thereon as  a class. Microtek's  Certificate of  Incorporation
does  not provide for any super majority  voting requirement with respect to any
amendment to Microtek's Certificate of Incorporation.
 
AMENDMENTS TO BYLAWS
 
    The GBCC permits  a corporation's  board of  directors to  amend, repeal  or
adopt  bylaws,  unless  (a) the  articles  of incorporation  reserve  this power
exclusively to the shareholders  or (b) the  shareholders expressly reserve  the
power  to amend or repeal a particular  bylaw. The shareholders alone may amend,
repeal or  adopt bylaws  limiting the  authority of  the board  of directors  or
establishing  staggered terms for directors. In addition, the board of directors
may not amend, repeal or  adopt a bylaw fixing  a greater shareholder quorum  or
voting  requirement. The Isolyser Bylaws provide that the Board of Directors has
the power to alter, amend or repeal the  Bylaws or adopt new Bylaws, but any  of
such  Bylaws may be altered,  amended or repealed, or  new Bylaws adopted by the
Shareholders. The Shareholders  may prescribe  that any Bylaws  adopted by  them
shall not be changed by the Board of Directors. Action taken by the Shareholders
with  respect to the Bylaws shall be taken  by affirmative vote of a majority of
such Shareholders entitled  to elect Directors  and present at  a duly  convened
Shareholders'  meeting. Action taken  by the Board of  Directors with respect to
the Bylaws must  be by  affirmative vote  of a  majority of  all Directors  then
holding office.
 
    Under  the DGCL, the power to adopt, amend or repeal bylaws rests with those
stockholders entitled to  vote, provided that  any corporation's certificate  of
incorporation  may additionally confer such power upon the directors. Conferring
the power to adopt, amend  or repeal bylaws upon  the directors may not  divest,
nor  limit,  the  stockholders' power  to  adopt,  amend or  repeal  bylaws. The
Microtek Certificate of  Incorporation does  not authorize  Microtek's Board  of
Directors  to adopt, alter,  amend, or repeal the  Microtek Bylaws. The Microtek
Bylaws may be amended or repealed at any meeting of stockholders where a  quorum
is  present; however, notice  of such meeting of  stockholders must disclose the
substance of the proposed amendment or repeal.
 
PREEMPTIVE RIGHTS
 
    Under the GBCC, the shareholders of all corporations do not have  preemptive
rights  except  to the  extent  the articles  of  incorporation so  provide. The
shareholders  of  corporations  in  existence   on  July  1,  1989  whose:   (i)
shareholders  had such rights as of that date; or (ii) articles of incorporation
have been restated  or amended  on or  after July 1,  1989, with  notice to  the
shareholders  that such restatement or amendment would cause the shareholders of
the corporation to have preemptive  rights, shall have preemptive rights  unless
the   articles  of  incorporation  expressly  provide  otherwise.  Isolyser  was
incorporated  in  1987;  however,   its  articles  of  incorporation   expressly
eliminated preemptive rights. Consequently, holders of shares of Isolyser Common
Stock do not have preemptive rights.
 
                                       57
<PAGE>
    The  DGCL does not automatically  confer preemptive rights on stockholders',
therefore, stockholders  have no  preemptive  rights unless  and except  to  the
extent  the  corporation's certificate  of  incorporation expressly  grants such
rights. The Microtek Certificate of  Incorporation does not contain a  provision
expressly  granting  preemptive  rights.  Consequently,  holders  of  shares  of
Microtek capital stock do not have preemptive rights.
 
STOCKHOLDER ACTION WITHOUT MEETING
 
    Under the GBCC, any action required or permitted to be taken by vote may  be
taken  without a meeting by  written consent, setting forth  the action so taken
and signed by the holders of all of  the shares entitled to vote on the  action,
provided that the articles of incorporation may permit action by written consent
of  the holders of  less than all  outstanding shares. The  Isolyser Articles of
Incorporation do  not contain  a  provision that  permits  action by  less  than
unanimous written consent.
 
    Unless  a corporation's certificate of incorporation otherwise provides, the
DGCL permits any action required to be taken at an annual or special meeting  of
stockholders  to be taken without a meeting,  without prior notice and without a
vote, if a written consent or consents setting forth the action taken is  signed
by  the holders of outstanding stock having  not less than the minimum number of
votes necessary to authorize or take such  action at a meeting where all  shares
entitled  to vote thereon were present and  voted, and shall be delivered to the
corporation  in  accordance   with  the  DGCL.   Microtek's  Bylaws  allow   the
stockholders  to take action without a meeting if all the stockholders who would
have been entitled to vote, or less than all such stockholders but not less than
the holders of a majority of the stock entitled to vote thereon if such  meeting
were  held,  consent in  writing  to such  corporate  action; provided  that the
written consent shall be signed by the holders of stock having not less than the
minimum number of votes that would be necessary to take such action at a meeting
at which all  shares entitled  to vote thereon  were present  and provided  that
prompt  notice must  be given  to all  stockholders of  the taking  of corporate
action without a meeting and by less than unanimous consent.
 
STOCKHOLDER ACTION -- QUORUM REQUIREMENT
 
    According to the GBCC, shares entitled to vote as a separate group may  take
action  on a matter  at a meeting  only if a  quorum of those  shares exist with
respect to that matter. Unless a corporation's articles of incorporation or  the
GBCC  provides otherwise,  a majority of  the votes  entitled to be  cast on the
matter by the voting group constitutes a quorum of that voting group for  action
on  that matter. The GBCC further provides that  if a quorum exists, action on a
matter (other than the election of directors)  by a voting group is approved  if
the votes cast within the voting group favoring the action exceed the votes cast
opposing  the  action  unless the  GBCC,  the  articles of  incorporation,  or a
provision of the bylaws adopted by the shareholders in accordance with the  GBCC
or  any  successor  statute, requires  a  greater number  of  affirmative votes.
According  to  the  GBCC,   unless  otherwise  provided   in  the  articles   of
incorporation,  directors are elected by a plurality of votes cast by the shares
entitled to vote in the election at a meeting at which a quorum is present.  The
articles  of incorporation or a bylaw adopted  according to the GBCC may provide
for a  greater or  lesser  quorum (but  not less  than  one-third of  the  votes
entitled to be cast) or a greater voting requirement for shareholders (or voting
groups  of shareholders) than is provided for in the GBCC; however, an amendment
to the articles  of incorporation or  bylaws that changes  or deletes a  greater
quorum  or  voting requirement  must  meet the  same  quorum requirement  and be
adopted by the same  vote and voting  groups required to  take action under  the
quorum  and  voting  requirements  prescribed in  the  provision  being amended.
Neither the Isolyser Articles  of Incorporation nor  the Isolyser Bylaws  modify
the  GBCC's  quorum  or  voting requirements  for  shareholder  action.  See "--
Amendments to Certificate or  Articles of Incorporation"  and "-- Amendments  to
Bylaws."
 
    The  DGCL allows a  corporation's certificate of  incorporation or bylaws to
specify the number of shares and/or the amount of other securities having voting
power whose holders shall be present or  represented by proxy at any meeting  in
order to constitute a quorum for, and the votes that shall be necessary for, the
transaction  of any  business, but  requires the quorum  to consist  of at least
one-third
 
                                       58
<PAGE>
of the shares entitled to  a vote at the  meeting. Absent specifications in  the
certificate  of incorporation  or bylaws of  the corporation, a  majority of the
shares entitled to vote, present in person or represented by proxy,  constitutes
a  quorum at a stockholders' meeting, and in all matters other than the election
of directors, the affirmative vote of a majority of shares present in person  or
represented  by proxy at the meeting and entitled  to vote will be the action of
the stockholders.  Directors are  elected by  a plurality  of the  votes of  the
shares  present in person or represented by proxy at the meeting and entitled to
vote on the election. Where a separate  vote by class or classes is required,  a
majority  of the outstanding shares of such  class or classes, present in person
or represented  by proxy,  constitutes a  quorum entitled  to take  action  with
respect  to the vote on that matter, and the affirmative vote of the majority of
shares of the class or classes present in person or represented by proxy at  the
meeting  and entitled to vote is the  act of the class. The Microtek Certificate
of Incorporation contains  no provisions  modifying the DGCL  quorum and  voting
requirements  for  stockholder  action.  See "--  Amendments  to  Certificate of
Articles of Incorporation" and "-- Amendments to Bylaws".
 
ANNUAL MEETING OF STOCKHOLDERS
 
    The GBCC provides that the corporation shall hold a meeting of  shareholders
at  a time stated in or fixed in accordance with the bylaws. The Isolyser Bylaws
state that the annual meeting of  shareholders will be held following the  close
of  each fiscal year on the date and  at the time designated, from time to time,
by Isolyser's Board of Directors.
 
    The DGCL requires a corporation to hold an annual meeting of stockholders to
elect directors and transact any other proper business as the bylaws  designate.
The  Microtek Bylaws state that the annual  meeting of stockholders will be held
on the first Monday in August in each year if not a legal holiday and if a legal
holiday, then on the next full business  day at 11:00 a.m., unless the Board  of
Directors provides otherwise.
 
SPECIAL MEETINGS OF STOCKHOLDERS
 
    The  GBCC permits  the board  of directors  or any  person specified  in the
corporation's articles of incorporation  or bylaws to  call special meetings  of
shareholders.  A special meeting may  also be called by  the holders of at least
25%, or such greater or lesser  percentages as the articles of incorporation  or
bylaws provide, of all of the votes entitled to be cast on any issue proposed to
be  considered at a special meeting. The  Isolyser Bylaws provide that a special
meeting may be called only by (a) the Board of Directors; (b) the President; (c)
the Secretary; (d) two or more Directors; or (e) the holders of at least 25%  of
all  the votes entitled to be cast on any issue proposed to be considered at the
special meeting. The Isolyser  Bylaws require that written  notice of the  time,
place  and  specific purpose  or purposes  for  which the  meeting is  called be
delivered not less  than ten nor  more than sixty  days before the  date of  the
meeting,  either personally or by first class mail to each shareholder of record
entitled to vote at such meeting.
 
    Under the DGCL, special meetings of stockholders may be called by the  board
of  directors or  those persons authorized  by the  corporation's certificate of
incorporation or the bylaws. The  Microtek Bylaws authorize Microtek's Board  of
Directors  to call a special meeting and provide that a special meeting may also
be called by the President,  or by stockholders owning  a majority in amount  of
the  entire capital  stock of  Microtek. Such  request shall  state the specific
purpose or purposes of  the special meeting. Written  notice of the time,  place
and  specific purposes of such meeting must be given by mail to each stockholder
entitled to vote at the meeting not less than ten nor more than sixty days prior
to the scheduled date of the special meeting.
 
CUMULATIVE VOTING
 
    Neither the GBCC nor the DGCL grant shareholders the right to cumulate their
votes for  directors unless  the  certificate or  articles of  incorporation  so
provide.  Neither  the Microtek  Certificate of  Incorporation nor  the Isolyser
Articles of Incorporation authorize cumulative voting.
 
NUMBER AND ELECTION OF DIRECTORS
 
    Under  the  GBCC,  a  board  of  directors  must  consist  of  one  or  more
individuals,  with the  number specified  in or  affixed in  accordance with the
articles of incorporation or bylaws. The articles of
 
                                       59
<PAGE>
incorporation or bylaws may authorize the shareholders or the board of directors
to fix or change the number of  directors or may establish a variable range  for
the  size of the  board of directors by  fixing a minimum  and maximum number of
directors. The GBCC  further permits the  articles of incorporation  or a  bylaw
adopted  by the shareholders to divide the  directors into two or three classes,
with each class as nearly equal in number as possible. The term of office of one
class of directors shall expire each year,  and no two classes' terms of  office
shall  expire in the same year. The  Isolyser Bylaws set the number of directors
between three  and  twenty,  with  the  specific  number  to  be  determined  by
Isolyser's Board of Directors.
 
    Under  the DGCL, the number of directors shall be fixed or determined in the
manner the bylaws provide, unless the corporation's certificate of incorporation
fixes the number of directors, in which case the number of directors may only be
changed by  amending the  certificate  of incorporation.  The DGCL  permits  the
certificate  of incorporation or bylaws to divide the directors into one, two or
three classes, with the term of office of one class of directors to expire  each
year and the terms of office of no two classes to expire during the same year.
 
    The  Microtek Bylaws currently set the number  of directors at no fewer than
five and no more than nine, with Microtek's Board of Directors or  shareholders,
at any annual or special meeting, to fix the exact number. Moreover, any holders
of  Microtek  Preferred  Stock  issued  in the  future  will  have  those rights
regarding the  election  of  directors  as are  fixed  by  Microtek's  Board  of
Directors at that time. Currently, the Board consists of seven members.
 
REMOVAL OF DIRECTORS
 
    Under the GBCC, except as the articles of incorporation otherwise provide, a
corporation's  shareholders may remove  any director, with  or without cause, by
the vote  of  the  holders of  a  majority  of the  outstanding  shares  of  the
corporation  entitled to vote. The GBCC permits the articles of incorporation or
a bylaw  adopted  by  the  shareholders to  govern  the  removal  of  directors.
Directors  elected to staggered terms may be  removed only for cause, unless the
articles of  incorporation  or  a  bylaw adopted  by  the  shareholders  provide
otherwise.  Neither  the Isolyser  Articles  of Incorporation  nor  the Isolyser
Bylaws alter the provisions of the GBCC with respect to removal of directors.
 
    The DGCL  permits  any director  or  the entire  board  of directors  to  be
removed,  with  or without  cause, by  the holders  of a  majority of  the stock
entitled to  vote  for directors,  except  (a)  if the  corporation's  board  of
directors is classified, stockholders of the corporation may only effect removal
for  cause unless the certificate of incorporation otherwise provides; or (b) if
the corporation's board of directors is voted for cumulatively, if less than the
entire board is to be removed, no  director may be removed without cause if  the
votes  cast  against  his removal  would  be  sufficient to  elect  him  if then
cumulatively voted at an election of the entire board of directors, or, if there
be classes of directors, at an election of the class of directors of which he is
a part. The Microtek Bylaws allow for the removal of any director or the  entire
board  of directors, with  or without cause, at  any time by  the holders of the
majority of the shares then entitled to vote an election of directors.
 
INDEMNIFICATION OF DIRECTORS AND OFFICERS
 
    Under the GBCC, a corporation may  indemnify any director or officer made  a
party  to a proceeding if such director or officer acted in a manner he believed
in good faith to be in or not  opposed to the best interests of the  corporation
and,  in the case of any criminal proceeding, had no reasonable cause to believe
his conduct  was unlawful.  A corporation  may  not indemnify  a director  in  a
derivative proceeding, or in a proceeding by or in the right of the corporation,
in  which the director is  adjudged liable to the  corporation, or in connection
with any  other proceeding  in  which he  is adjudged  liable  on the  basis  he
improperly  received a  personal benefit.  The corporation  may not  indemnify a
director unless a determination is made that he has met the applicable  standard
of  conduct. The corporation is  required to indemnify a  director to the extent
that the  director has  been successful,  on  the merits  or otherwise,  in  the
defense  of any proceeding  to which he was  a party because of  his status as a
director of the corporation. The GBCC also provides that a company's Articles of
Incorporation or a  Bylaw or agreement  approved by shareholders  may provide  a
director with additional indemnification without
 
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<PAGE>
regard  to certain  of the aforementioned  limitations. The  Isolyser Bylaws, as
approved by  Isolyer's  shareholders,  provide  that  Isolyser's  directors  and
officers  will be indemnified to the fullest  extent permitted and in the manner
required under the GBCC.
 
    The DGCL  allows  corporations to  indemnify  their directors  and  officers
against  civil and criminal  liabilities incurred if  the directors and officers
acted in  good faith  and in  a  manner the  directors and  officers  reasonably
believed  to be in or not opposed to the best interests of the corporation, and,
with respect to any criminal action, if they had no reasonable cause to  believe
their  conduct was unlawful.  The Microtek Certificate  of Incorporation and the
Microtek  Bylaws  provide  that  Microtek's  directors  and  officers  will   be
indemnified  to the fullest extent  permitted and in the  manner required by the
DGCL.
 
LIMITATION OF PERSONAL LIABILITY OF DIRECTORS
 
    Under the  GBCC,  the  articles  of incorporation  may  limit  a  director's
personal  liability to the corporation or  its shareholders for monetary damages
for breach of the duty of care or  other duty as a director, except (a) for  any
appropriation,  in violation of  his duties, of any  business opportunity of the
corporation, (b)  for acts  or omissions  involving the  director's  intentional
misconduct  or a knowing violation of law, (c) for unlawful distributions of the
corporation's assets,  or  (d)  for  any transaction  from  which  the  director
received  an improper  personal benefit.  No such  provision shall  eliminate or
limit a director's liability for any act or omission occurring prior to the date
the provision becomes effective.
 
    The Isolyser Articles of Incorporation limit a director's personal liability
to Isolyser or its shareholders for monetary damages for breaches of the duty of
care or the director's other duties to the extent permissible under the GBCC.
 
    The DGCL allows a corporation's certificate of incorporation to eliminate or
limit a director's personal liability to the corporation or its stockholders for
monetary damages for the director's breach of his fiduciary duty as a  director.
However,  the corporation may not eliminate  or limit a director's liability (a)
for any breach  of the  director's duty  of loyalty  to the  corporation or  its
stockholders,  (b) for  acts or  omissions not  in good  faith or  which involve
intentional misconduct  or a  knowing  violation of  law,  (c) for  an  unlawful
payment  of dividends or an unlawful stock purchase or redemption or (d) for any
transaction from which the  director derived any  improper personal benefit.  No
provision may retroactively eliminate or limit a director's liability.
 
    The  Microtek  Certificate  of Incorporation  limits  a  director's personal
liability to  Microtek or  its stockholders  for monetary  damages to  the  full
extent  permitted by the DGCL, and states that any repeal or modification of the
DGCL provision  will be  prospective only,  and will  not adversely  affect  any
limitation  on the  personal liability  existing at or  before the  time of such
repeal or modification applicable to any Microtek director.
 
                                OPTION PROPOSALS
 
ISOLYSER'S OPTION PROPOSAL
 
    In April 1992, the Board of Directors and shareholders of Isolyser adopted a
Stock Option Plan (the "Plan"). The Plan currently provides for the issuance  of
options  to purchase up to 3,600,000 shares of Isolyser Common Stock (subject to
appropriate adjustments  in  the event  of  stock splits,  stock  dividends  and
similar  dilutive events). On July 17, 1996,  the Board of Directors of Isolyser
approved, adopted and recommended to the  shareholders an amendment to the  Plan
providing  for  an  increase, contingent  upon  consummation of  the  Merger, of
800,000 in the  number of shares  of Isolyser Common  Stock available under  the
Plan  for grant of options or alternate  rights to 4,400,000 shares, and certain
other technical amendments  to the  Plan (the "Isolyser  Option Proposal").  The
technical  amendments  to  the Plan  included  in the  Isolyser  Option Proposal
provide, consistent with the recent modifications to Rule 16 under the  Exchange
Act, for (i) authority of the Board of Directors or a committee thereof to grant
permission  to transfer options granted under  the Plan and (ii) dispensing with
the Plan's
 
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<PAGE>
requirement for  shareholder  approval  to  increase the  number  of  shares  of
Isolyser Common Stock available under the Plan. Options may be granted under the
Plan  to those employees, officers or directors of, and consultants and advisors
to, Isolyser, who, in  the opinion of  Isolyser's Board of  Directors, are in  a
position to contribute materially to Isolyser's continued growth and development
and  to its long-term financial success. Isolyser estimates that, as of the date
of  this  Joint  Proxy   Statement/Prospectus,  approximately  1,400   employees
(including  officers), six directors and 22 consultants and advisors of Isolyser
are eligible to participate in the Plan. The Plan is administered by a committee
of the Board appointed by Isolyser's Board of Directors, which may be the entire
Board of Directors. Isolyser's Compensation Committee has been designated by the
Board of Directors as the committee to administer the Plan. The purposes of  the
Plan  are to ensure the retention of existing executive personnel, key employees
and consultants of Isolyser, to attract and retain new executive personnel,  key
employees  and consultants  and to  provide additional  incentives by permitting
such individuals to participate in the ownership of Isolyser.
 
    Options granted  to employees  may  either be  incentive stock  options  (as
defined  in the Code) or  nonqualified stock options. The  exercise price of the
options shall  be determined  by  the Board  of  Directors or  the  Compensation
Committee at the time of grant, provided that the exercise price may not be less
than  the fair market value  of Isolyser's Common Stock on  the date of grant as
determined in accordance with the limitations  set forth in the Code. The  terms
of  each  option  and the  period  over which  it  vests are  determined  by the
Compensation Committee, although no option may be exercised more than ten  years
after  the date of grant and all  options become exercisable upon certain events
defined to constitute a change of control. To the extent that the aggregate fair
market value, as of the date of grant, of shares with respect to which incentive
stock options become exercisable  for the first time  by an optionee during  the
calendar year exceeds $100,000, the portion of such option which is in excess of
the  $100,000  limitation will  be treated  as a  nonqualified stock  option. In
addition, if an optionee  owns more than  10% of the total  voting power of  all
classes  of Isolyser's stock at the time  the individual is granted an incentive
stock option, the purchase price per share cannot be less than 110% of the  fair
market  value on the  date of grant and  the term of  the incentive stock option
cannot exceed five years from the date of grant. Upon the exercise of an option,
payment may be made by cash, check  or, if provided in the option agreement,  by
delivery  of shares of Isolyser's Common Stock  having a fair market value equal
to the exercise price of the options, or  any other means that the Board or  the
committee determines. Options are non-transferable during the life of the option
holder. The Plan also permits the grant of alternate rights defined as the right
to  receive  an amount  of cash  or shares  of Isolyser  Common Stock  having an
aggregate fair market value equal to  the appreciation in the fair market  value
of a stated number of shares of Isolyser Common Stock from the grant date to the
date of exercise. No alternate rights have been granted under the Plan.
 
    An  optionee will not be subject to tax at the time a nonqualified option is
granted; however, an optionee who  exercises a nonqualified option will  include
in  income as of the date of exercise the difference between (a) the fair market
value of Isolyser Common  Stock as of  the date of exercise  and (b) the  amount
paid  for  Isolyser Common  Stock upon  exercise of  the option.  The optionee's
federal income tax cost basis for the  Isolyser Common Stock will be the  amount
paid  for the Isolyser Common  Stock plus the income  recognized. If an optionee
uses Isolyser Common Stock in full or partial payment of the exercise price of a
nonqualified option, then the exchange should not affect the federal income  tax
treatment  of  the exercise.  The optionee  will  realize no  gain or  loss with
respect to  the Common  Stock so  used. The  net additional  shares of  Isolyser
Common  Stock received upon  such exercise by  the optionee will  have a federal
income tax cost basis equal to the ordinary income recognized as a result of the
option exercise (plus the amount of any cash used in the option exercise) and  a
holding  period commencing upon  the date such  income is recognized. Subsequent
sale of such Common  Stock will result in  a capital gain or  loss equal to  the
difference between the optionee's federal income tax cost basis for the Isolyser
Common  Stock and the sale price. Isolyser  will be entitled to a federal income
tax deduction, as of  the date the optionee  recognizes ordinary income, in  the
amount  of the ordinary income recognized by the optionee. In addition, Isolyser
may be required to withhold  income tax and employment  tax with respect to  the
ordinary income recognized by the
 
                                       62
<PAGE>
optionee  at the time  of exercise. The  federal income tax  consequences of the
issuance and exercise of incentive stock options are generally the same as those
for nonqualified  stock options,  except that  (subject to  the satisfaction  of
certain  holding period requirements) the  optionee generally does not recognize
ordinary income for  the difference between  the fair market  value of  Isolyser
Common  Stock at the time  of exercise and the  exercise price for such Isolyser
Common Stock (but the difference may be a preference for alternative minimum tax
purposes) and Isolyser receives no deduction therefor.
 
    Assuming  consummation  of  the  Merger,  additional  options  will   become
outstanding  under the Plan as a result  of the assumption of the Microtek stock
options. As of  July 1,  1996, Microtek had  outstanding under  its Option  Plan
options  to  purchase a  total of  627,730  shares (47,295  of which  shares are
subject to Microtek stockholder approval)  of Microtek Common Stock at  exercise
prices  ranging between  $1.36 and $6.25  per share.  Based on the  1.65 to 1.00
Exchange Ratio  under  the  Merger  Agreement such  Microtek  options  would  be
converted upon consummation of the Merger into options to purchase up to a total
of  1,035,755 shares of Isolyser Common Stock  under the Plan at exercise prices
ranging between $0.83  and $3.79 per  share; the current  executive officers  of
Microtek  would hold options to purchase up to an aggregate of 653,903 shares of
Isolyser Common  Stock (namely,  Kimber L.  Vought, chief  executive officer  of
Microtek, will hold options to purchase a total of 171,608 and 107,250 shares of
Common  Stock at exercise prices of $0.83 and $3.49 per share, respectively; Dan
R. Lee,  chief financial  officer of  Microtek, will  hold options  to  purchase
251,295  and 41,250 shares of Common Stock at exercise prices of $0.83 and $3.49
per share,  respectively;  and Lester  J.  Berry, executive  vice  president  of
Microtek, will hold options to purchase 66,000 and 16,500 shares of Common Stock
at  exercise prices of  $3.19 and $2.73  per share, respectively);  and the non-
executive officer employee group of Microtek  would hold options to purchase  up
to an aggregate of 381,852 shares of Isolyser Common Stock.
 
    As  of July 1, 1996, options to purchase 2,113,329 shares of Isolyser Common
Stock were  outstanding under  the Plan  and approximately  1,189,000 shares  of
Isolyser  Common Stock were available for  future grants of options or alternate
rights under  the Plan.  Options for  the purchase  of an  aggregate of  800,000
shares  of  Isolyser  Common Stock  have  been  granted under  the  Plan  to the
executive officers of Isolyser, as a group. The Chief Executive Officer and  the
other  four most highly compensated executive officers of Isolyser for 1995 hold
options under the Plan  to purchase an aggregate  of 559,000 shares of  Isolyser
Common Stock. No director who is not also an executive officer of Isolyser holds
options under the Plan.
 
    The  approval of  the Plan  amendment requires  the affirmative  vote of the
holders of  a  majority  of the  shares  of  Isolyser Common  Stock  present  or
represented by properly executed and delivered proxies at the Isolyser Meeting.
 
    THE  ISOLYSER BOARD  OF DIRECTORS  RECOMMENDS A  VOTE "FOR"  APPROVAL OF THE
AMENDMENT TO THE STOCK  OPTION PLAN DESCRIBED HEREIN.  PROXIES SOLICITED BY  THE
ISOLYSER  BOARD  OF  DIRECTORS  WILL BE  SO  VOTED  UNLESS  SHAREHOLDERS SPECIFY
OTHERWISE.
 
MICROTEK'S OPTION PROPOSAL
 
    In 1990, Microtek established the Option Plan to encourage the ownership  of
Microtek  Common  Stock by  Microtek employees.  All  employees are  eligible to
participate in  the Option  Plan, subject  to length  of service  criteria.  The
intention  of Microtek in administering the  Option Plan is to provide employees
with an ongoing incentive to increase earnings and productivity, to  acknowledge
superior  service  contributions by  employees  and to  recognize  promotions of
employees. Each option granted pursuant to  the Option Plan intended to  qualify
as an incentive stock option under Section 422 of the Code must have an exercise
price equal to the fair market value of the Microtek Common Stock on the date of
grant.  All other options  may be granted  at such exercise  prices as the Board
shall determine.  Pursuant to  the November  1995 recommendation  of  Microtek's
Compensation  Committee, the Microtek Board amended  the Option Plan, subject to
the approval of the Microtek stockholders,  to increase the number of shares  of
Microtek   Common   Stock  subject   to  the   plan   from  883,302   shares  to
 
                                       63
<PAGE>
1,083,302 shares (the  "Microtek Option Proposal").  Approval of this  amendment
requires  the affirmative  vote of the  holders of  a majority of  the shares of
Microtek Common  Stock  represented  at  the  Microtek  Meeting.  THE  BOARD  OF
DIRECTORS  RECOMMENDS A VOTE  "FOR" APPROVAL OF  THE OPTION PROPOSAL.  As of the
date of the Microtek Board resolution to recommend the Microtek Option  Proposal
to  the Microtek  Stockholders, the members  of the  Microtek Board beneficially
owned in excess of 50%  of the shares of Common  Stock to be represented at  the
Microtek  Meeting and have advised Microtek that  they will vote in favor of the
Microtek Option Proposal.
 
    As of  March  15,  1996  (and  provided  the  Microtek  Option  Proposal  is
approved), options to purchase an aggregate of 930,597 shares of Microtek Common
Stock  (net of options cancelled) had been  granted pursuant to the Option Plan,
options to purchase 219,168  shares had been exercised  and options to  purchase
711,429 shares remained outstanding. As a result, no shares remain available for
additional  option grants under the Option Plan; however, options to purchase an
additional 47,295 shares of Common Stock have been granted, subject to obtaining
stockholder approval of the Microtek Option Proposal. If the Merger Agreement is
approved by  the  Microtek  stockholders  and  the  Merger  is  consummated,  no
additional  options  will be  granted under  the Option  Plan. In  addition, the
Merger Agreement prohibits the further grant of options by Microtek prior to the
Merger.
 
    As of March  15, 1996,  the following  executive officers  had been  granted
options  under the Option Plan in the amounts indicated: Kimber L. Vought, Chief
Executive Officer, 204,005 shares (including  options to purchase 22,045  shares
granted  subject  to stockholder  approval);  Dan R.  Lee,  Vice President-Chief
Operating and Financial Officer, 208,300  shares and Lester J. Berry,  Executive
Vice President, 50,000 shares.
 
    The  following discussion  addresses certain anticipated  federal income tax
consequences to recipients of awards made under the Option Plan. It is based  on
the  Code and  interpretations thereof as  in effect  on the date  of this Proxy
Statement/Prospectus.
 
    An optionee  to  whom  a  nonqualified stock  option  is  granted  will  not
recognize  income as a result of the grant of the option. However, upon exercise
of the nonqualified stock option, the optionee will generally recognize ordinary
compensation income equal to the excess, if any, of the fair market value of the
shares received pursuant to  exercise of the option  (the "Option Shares")  over
the  exercise price. Taxation will  be deferred until the  date of exercise of a
nonqualified stock  option, subject  to certain  exceptions, if  either (i)  the
Option  Shares are subject to restrictions  imposed by the Committee which could
result in a substantial risk of their forfeiture or (ii) the optionee is subject
to the forfeiture provisions  of Section 16(b) of  the Exchange Act, unless,  in
either  event, the optionee makes  an election pursuant to  Section 83(b) of the
Code (an "83(b) Election"), within 30 days  of receipt of the Option Shares,  to
be  taxed on the date of  receipt of the Option Shares.  If no 83(b) Election is
made, the optionee will recognize ordinary  compensation income at the time  the
Option  Shares are no longer subject to  such restrictions or the optionee is no
longer subject to Section  16(b) liability as  a result of  the transfer of  the
Option  Shares, in  an amount  equal to the  excess of  the value  of the Option
Shares at such time over the amount paid for them. The optionee's tax basis  for
the  Option Shares will be equal to the exercise price paid by the optionee plus
the amount includable in  the optionee's gross income  as compensation, and  the
optionee's  holding period for  the Option Shares  will commence on  the date on
which the Option Shares are acquired.
 
    An optionee to whom an incentive stock option which qualifies under  Section
422  of the Code is  granted generally will not recognize  income at the time of
grant of the Incentive Stock Option or at the time of its exercise. However, the
excess of  the fair  market  value of  the Shares  subject  to the  option  (the
"Incentive  Shares") over the  exercise price of  the option at  the time of its
exercise is  an  adjustment  to  taxable income  in  determining  an  optionee's
alternative  minimum taxable income  and ultimately his  alternative minimum tax
(AMT). As a result, this  adjustment could cause the  optionee to be subject  to
AMT or increase the optionee's AMT liability.
 
    If an optionee who has exercised an incentive stock option does not sell the
Incentive Shares until more than one year after exercise and more than two years
after the date of grant, such optionee will
 
                                       64
<PAGE>
normally  recognize long term capital  gain or loss equal  to the difference, if
any, between the selling price of  the Incentive Shares and the exercise  price.
If  the optionee sells  the Incentive Shares  before the time  periods expire (a
"disqualifying disposition")  he or  she  will recognize  ordinary  compensation
income  equal to  the lesser  of (i)  the difference,  if any,  between the fair
market value of the Incentive  Shares on the date  of exercise and the  exercise
price  of the option, and (ii) the difference, if any, between the selling price
for the Incentive Shares and the exercise price of the option. Any other gain or
loss on such sale will  normally be capital gain or  loss. The tax basis of  the
Incentive  Shares to the optionee, for purposes  of computing such other gain or
loss, should be equal to the exercise price paid (plus, in the case of an  early
disposition,   the  amount  includable   in  the  optionee's   gross  income  as
compensation, if any).
 
    With respect  to  either nonqualified  or  incentive stock  options,  if  an
optionee  delivers shares of the issuing company's  common stock in part or full
payment of the option  price, the optionee generally  will be treated as  having
exchanged  such  shares for  an equivalent  number of  the shares  received upon
exercise of the  option (the "Exchange  Shares"), and  no gain or  loss will  be
recognized  with respect to the shares surrendered  to the company in payment of
the option price.  In such a  case, the optionee  will have a  tax basis in  the
Exchange  Shares which is the same as the  optionee's tax basis in the shares of
stock delivered in payment  of the option price.  The remaining Shares  received
upon  exercise of the option (other than  the Exchange Shares) will, in the case
of nonqualified stock options, have a  tax basis equal to the income  recognized
on  the exercise of the option plus  any cash consideration paid by the optionee
pursuant to the  exercise of  the option,  and in  the case  of incentive  stock
options,  will have  a tax  basis equal  to any  cash consideration  paid by the
optionee pursuant to the exercise of the option.
 
    The discussion set forth above  is intended only as  a summary and does  not
purport  to be a complete  enumeration or analysis of  all potential tax effects
relevant to  recipients  of  awards  under  the  Option  Plan.  It  is  strongly
recommended  that all award recipients consult their own tax advisors concerning
the federal, state  and local income  and other tax  considerations relating  to
such  awards and rights  thereunder. In particular, it  is recommended that each
award recipient consult his or her own tax advisor as to the AMT consequences of
an award, the special tax considerations  for an award recipient who is  subject
to  Section  16(b), whether  it  would be  beneficial  to make  a  Section 83(b)
Election, whether to exchange shares in order  to exercise an option, and as  to
any state tax consequences relating to awards under the Option Plan.
 
    The  Option Plan  may establish  for officers  and directors  of Microtek an
exemption from  the provisions  of Section  16(b) of  the Exchange  Act for  the
grants  of options. Section  16(b) provides for recovery  by Microtek of profits
made by officers and directors on  short-term trading in shares of common  stock
of Microtek. Grants of options to purchase common stock under the Option Plan by
officers and employee-directors of Microtek may be entitled to an exemption from
the  operation of Section  16(b), provided certain conditions  are met under the
rules and regulations of the Commission.
 
    The following table sets forth  certain information with respect to  options
which  have been granted subject to  stockholder approval pursuant to the Option
Plan to the following:
 
                             AMENDED PLAN BENEFITS
 
<TABLE>
<CAPTION>
NAME AND POSITION                                        NUMBER OF OPTIONS
- -------------------------------------------------------  ------------------
<S>                                                      <C>
Kimber L. Vought                                                 22,045
Dan R. Lee                                                            0
Lester J. Berry                                                       0
Executive Group                                                  22,045
Non-Executive Director Group                                          0
Non-Executive Officer Employee Group                             25,250
</TABLE>
 
    The exercise  price of  all options  referenced above  was set  at the  fair
market value of the Microtek Common Stock on the date of grant.
 
                                       65
<PAGE>
                                 LEGAL MATTERS
 
    The  validity  of  the shares  of  Isolyser  Common Stock  to  be  issued in
connection with the Merger is being passed upon for Isolyser by Arnall Golden  &
Gregory, Atlanta, Georgia.
 
                                    EXPERTS
 
    The  consolidated financial  statements and the  related financial statement
schedule of Isolyser as of December 31, 1994 and 1995 and for each of the  three
years  in the period  ended December 31,  1995 incorporated in  this joint proxy
statement/prospectus by reference from Isolyser's Annual Report on Form 10-K for
the year ended December  31, 1995 have  been audited by  Deloitte & Touche  LLP,
independent  auditors,  as  stated  in their  report  which  is  incorporated by
reference herein and have  been so incorporated in  reliance upon the report  of
such firm given upon their authority as experts in accounting and auditing.
 
    The  consolidated financial statements  of Microtek as  of November 30, 1994
and 1995, and for each of the years in the three-year period ended November  30,
1995  have been incorporated by reference herein  in reliance upon the report of
KPMG Peat Marwick LLP, independent certified public accountants, incorporated by
reference herein, and upon the authority  of such firm as experts in  accounting
and auditing.
 
    The  financial statements of Medi-Plast as of December 31, 1993 and 1994 and
for each of the years in the  two-year period ended December 31, 1994 have  been
incorporated  in this joint proxy  statement/prospectus by reference in reliance
upon  the  report  of  Olin  J.  Harrell,  CPA,  independent  certified   public
accountant,  incorporated by reference herein, in reliance upon the authority of
such accountant as an expert in accounting and auditing.
 
    The statement  of  divisional assets,  liabilities  and parent's  equity  of
Venodyne  as  of February  24, 1996,  and the  related statements  of divisional
income and cash flows for the 11 month period then ended, have been incorporated
in this  joint proxy  statement/prospectus  by reference  in reliance  upon  the
report  of Wolf & Company, P.C., independent auditors, incorporated by reference
herein, in reliance upon the authority of such firm as experts in accounting and
auditing.
 
    The consolidated financial  statements of  White Knight as  of December  31,
1993  and 1994 and for each of the years in the three-year period ended December
31, 1994, and  the statements  of operations  and accumulated  deficit and  cash
flows  of CliniTech (a former  division of Sterile Concepts)  for the year ended
September 30, 1992 and for the period from October 1, 1992 to February 8,  1993,
incorporated in this joint proxy statement/prospectus by reference to Isolyser's
Current  Report on Form 8-K  filed with the Commission  on October 3, 1995, have
been so incorporated  in reliance  upon the reports  of KPMG  Peat Marwick  LLP,
independent certified public accountants, and upon the authority of said firm as
experts in accounting and auditing.
 
    The  financial statements of SafeWaste  as of December 31,  1994 and for the
year then  ended  incorporated  in  this  joint  proxy  statement/prospectus  by
reference  from Isolyser's Current Report on  Form 8-K filed with the Commission
on June 15, 1995 have been audited  by Ernst & Young LLP, independent  auditors,
as  stated in their report, which is  incorporated by reference herein, and have
been so incorporated in reliance upon the  report of such firm given upon  their
authority as experts in accounting and auditing.
 
                            STOCKHOLDERS' PROPOSALS
 
    If  the  Merger does  not occur,  Microtek  will have  an annual  meeting of
stockholders in late 1996. If an  annual meeting of Microtek stockholders is  to
occur in 1996, any proposals from stockholders to be presented for consideration
for  inclusion in the proxy material in connection with such annual meeting must
be submitted in accordance with the rules of the Commission and received by  the
Secretary  of Microtek at  Microtek's principal executive  offices no later than
the close of business on September 30, 1996.
 
                                       66
<PAGE>
                                                                         ANNEX A
 
                          AGREEMENT AND PLAN OF MERGER
 
                                     AMONG
 
                             ISOLYSER COMPANY, INC.
                            (A GEORGIA CORPORATION)
 
                                MMI MERGER CORP.
                            (A DELAWARE CORPORATION)
 
                                      AND
 
                             MICROTEK MEDICAL, INC.
                            (A DELAWARE CORPORATION)
 
                             Dated: March 15, 1996
                           As Amended: June 23, 1996
                               and July 29, 1996
<PAGE>
    This  Agreement and Plan of Merger (the "Agreement") is made and dated as of
the 15th day of March, 1996, and is amended as of the 23rd day of June, 1996 and
the 29th day of July, 1996, among Isolyser Company, Inc., a Georgia  corporation
("ICI"); MMI Merger Corp., a Delaware corporation (the "Merger Corp."), which is
wholly  owned, directly  or indirectly,  by ICI;  and Microtek  Medical, Inc., a
Delaware corporation ("MMI").
 
    In consideration of  the mutual covenants  and agreements contained  herein,
the parties hereto covenant and agree as follows:
 
                                   ARTICLE 1.
                                   THE MERGER
 
    1.1.  MERGER.  In accordance with the provisions of the business corporation
laws  of the State of Delaware, at  the Effective Date (as hereinafter defined),
Merger Corp. shall  be merged  (the "Merger")  into MMI,  and MMI  shall be  the
surviving  corporation (the "Surviving Corporation")  and as such shall continue
to be governed by the laws of the State of Delaware.
 
    1.2.  CONTINUING  OF CORPORATE EXISTENCE.   Except as  may otherwise be  set
forth  herein,  the  corporate  existence  and identity  of  MMI,  with  all its
purposes, powers, franchises, privileges, rights and immunities, shall  continue
unaffected  and  unimpaired  by  the Merger,  and  the  corporate  existence and
identity of Merger Corp., with all its purposes, powers, franchises, privileges,
rights and immunities, at the Effective Date shall be merged with and into  that
of  MMI, and the Surviving  Corporation shall be vested  fully therewith and the
separate corporate existence and identity of Merger Corp. shall thereafter cease
except to the extent continued by statute.
 
    1.3.  EFFECTIVE DATE.  The Merger shall become effective upon the occurrence
of the  filing of  the certificate  of merger  (the "Effective  Date") with  the
Secretary  of State  of the State  of Delaware  on the Closing  Date (as defined
herein) pursuant  to the  provisions  of the  Delaware General  Corporation  Law
("DGCL").
 
    1.4.  CORPORATE GOVERNMENT.
 
        (a) The Certificate of Incorporation of Merger Corp, as in effect on the
    Effective  Date, shall continue  in full force  and effect and  shall be the
    Certificate of Incorporation of the Surviving Corporation.
 
        (b) The Bylaws of Merger Corp., as  in effect as of the Effective  Date,
    shall  continue in  full force  and effect  and shall  be the  Bylaws of the
    Surviving Corporation.
 
        (c) The members of the Board  of Directors of the Surviving  Corporation
    shall  be  the  persons holding  such  offices  in Merger  Corp.  as  of the
    Effective Date, and the officers of  the Surviving Corporation shall be  the
    persons holding such offices in MMI as of the Effective Date.
 
    1.5.   RIGHTS AND  LIABILITIES OF THE SURVIVING  CORPORATION.  The Surviving
Corporation shall have the following rights and obligations:
 
        (a) The  Surviving Corporation  shall have  all the  rights,  privileges
    immunities and powers and shall be subject to all the duties and liabilities
    of a corporation organized under the laws of the State of Delaware.
 
        (b)   The  Surviving  Corporation  shall  possess  all  of  the  rights,
    privileges immunities and franchises, of either a public or private  nature,
    of  MMI and Merger Corp. and all property, real, personal and mixed, and all
    debts due on  whatever account,  including subscription to  shares, and  all
    other  choses in action, and every other  interest of or belonging or due to
    MMI and Merger Corp. shall be taken and deemed to be transferred or invested
    in the Surviving Corporation without further act or deed.
 
                                      A-1
<PAGE>
        (c) At the Effective Date,  the Surviving Corporation shall  thenceforth
    be  responsible and  liable for all  liabilities and obligations  of MMI and
    Merger Corp. and any  claim existing or action  or proceeding pending by  or
    against  Merger Corp.  or MMI  may be  prosecuted as  if the  Merger had not
    occurred, or  the Surviving  Corporation may  be substituted  in its  place.
    Neither  the rights of creditors  nor any liens upon  the property of Merger
    Corp. or MMI shall be impaired by the Merger.
 
    1.6.   CLOSING.   Consummation  of  the transactions  contemplated  by  this
Agreement  (the "Closing") shall  take place at  the offices of  Arnall Golden &
Gregory in Atlanta, Georgia, commencing at  10:00 a.m., local time, on the  date
(i)  on which the Special Meetings of  MMI's and ICI's stockholders described in
Section 5.8 occur or (ii) as soon as possible thereafter when each of the  other
conditions  set forth  in Articles 6  and 7  have been satisfied  or waived, and
shall proceed promptly to conclusion, or at  such other place, time and date  as
shall  be fixed by  mutual agreement between ICI  and MMI. The  day on which the
Closing shall occur is referred to herein as the "Closing Date." Each party will
cause to be  prepared, executed and  delivered the Certificate  of Merger to  be
filed  with the  Secretary of  State of Delaware  and all  other appropriate and
customary documents as any party or  its counsel may reasonably request for  the
purpose  of consummating  the transactions  contemplated by  this Agreement. All
actions taken at the Closing shall  be deemed to have been taken  simultaneously
at the time the last of any such actions is taken or completed.
 
    1.7.   TAX CONSEQUENCES.  It is  intended that the Merger shall constitute a
reorganization within the meaning of Section 368(a)(1)(A), by virtue of  Section
368(a)(2)(E), of the Internal Revenue Code of 1986, as amended (the "Code"), and
that this Agreement shall constitute a "plan of reorganization" for the purposes
of Section 368 of the Code.
 
    1.8.   POOLING OF INTERESTS.  It is the intention of the parties hereto that
the Merger will  be treated  for financial reporting  purposes as  a pooling  of
interests.
 
                                   ARTICLE 2.
                   CONVERSION OF SHARES; TREATMENT OF OPTIONS
 
    2.1.   CONVERSION OF SHARES.   The manner and  basis of converting shares of
the common stock, $.01 par  value, of MMI (the  "MMI Common Stock") into  Common
Stock, $.001 par value, of ICI ("ICI Common Stock"), shall be as follows:
 
        (a)  Except as provided in  Section 2.3, each share  of MMI Common Stock
    which shall be outstanding immediately prior to the Effective Date shall  at
    the  Effective Date, by virtue  of the Merger and  without any action on the
    part of the  holder thereof,  be converted into  the right  to receive  1.65
    shares  of ICI  Common Stock  (such number being  referred to  herein as the
    "Exchange Ratio").
 
        (b) Each share of MMI Common Stock held in the treasury of MMI and  each
    share  of  MMI  Common  Stock  owned  by  ICI  or  any  direct  or  indirect
    wholly-owned subsidiary of ICI or of MMI shall automatically be canceled and
    extinguished without any conversion thereof and no payment will be made with
    respect thereto.
 
        (c) Each share of Common Stock,  $.001 par value, of Merger Corp.  which
    shall  be outstanding immediately  prior to the Effective  Date shall at the
    Effective Date, by virtue of the Merger  and without any action on the  part
    of  the holder  thereof, be  converted into  one share  of newly  issued MMI
    Common Stock.
 
    2.2.  FRACTIONAL SHARES.  No scrip or fractional shares of ICI Common  Stock
shall  be  issued  in the  Merger,  nor  will any  outstanding  fractional share
interest entitle the owner thereof to vote, to receive dividends or to  exercise
any  other right of  a stockholder of the  Surviving Corporation. All fractional
shares of ICI Common  Stock to which  a holder of  MMI Common Stock  immediately
prior  to the Effective Date  would otherwise be entitled  at the Effective Date
shall be aggregated. If a fractional
 
                                      A-2
<PAGE>
share results from such aggregation,  such stockholder shall be entitled,  after
the  later of (a) the Effective Date  or (b) the surrender of such stockholder's
"Certificate" (as defined in  Section 2.5) or  Certificates that represent  such
shares  of MMI Common  Stock, to receive from  ICI an amount in  cash in lieu of
such fractional share,  equal to such  fraction multiplied by  $10.00. ICI  will
make  available to  the "Exchange  Agent" (as defined  in Section  2.5) the cash
necessary for the purpose of paying cash for fractional shares.
 
    2.3.  DISSENTING SHARES.  To the extent that appraisal rights are  available
under  the DGCL,  shares of  MMI Common  Stock that  are issued  and outstanding
immediately prior  to  the Effective  Date  and that  have  not been  voted  for
adoption  of the  Merger and  with respect of  which appraisal  rights have been
properly demanded  in accordance  with  the applicable  provisions of  the  DGCL
("Dissenting  Shares")  shall not  be converted  into the  right to  receive the
consideration provided for  in Sections 2.1  and 2.2 at  or after the  Effective
Date  unless and until the  holder of such shares  withdraws his demand for such
appraisal (in accordance with the applicable provisions of the DGCL) or  becomes
ineligible  for such appraisal.  If a holder of  Dissenting Shares withdraws his
demand for such appraisal (in accordance  with the applicable provisions of  the
DGCL)  or becomes ineligible for such appraisal,  then, as of the Effective Date
or  the  occurrence  of  such  event,  whichever  later  occurs,  such  holder's
Dissenting  Shares shall  cease to be  Dissenting Shares and  shall be converted
into and  represent the  right  to receive  the  consideration provided  for  in
Sections  2.1 and 2.2. If any holder of  MMI Common Stock shall assert the right
to be paid the fair value of such MMI Common Stock as described above, MMI shall
give ICI  prompt  written  notice  thereof  and ICI  shall  have  the  right  to
participate  in and direct all negotiations  and proceedings with respect to any
such demands.  MMI shall  not, except  with the  prior written  consent of  ICI,
voluntarily  make any payment with respect to, or settle or offer to settle, any
such demand for payment. After the Effective Date, ICI will cause the  Surviving
Corporation to pay its statutory obligations to holders of Dissenting Shares.
 
    2.4.  STOCK OPTIONS.
 
        (a)  At the Effective Date, all options (the "Options") then outstanding
    under MMI's 1990 Incentive Stock Option  Plan (the "MMI Stock Option  Plan")
    shall  remain  outstanding following  the Effective  Date. At  the Effective
    Date, such Options shall,  by virtue of the  Merger and without any  further
    action  on the part of MMI  or the holder of any  such Option, be assumed by
    ICI in  accordance with  their terms  and  conditions as  in effect  at  the
    Effective  Date (and the terms and conditions of the MMI Stock Option Plan),
    except that (i) each such Option shall be exercisable for that whole  number
    of  shares of ICI Common  Stock (to the nearest  whole share) into which the
    number of shares  of MMI  Common Stock  subject to  such Option  immediately
    prior  to the Effective Date would be  converted under Section 2.1; (ii) the
    option price per share of the MMI  Common Stock shall be an amount equal  to
    the  option price per  share of MMI  Common Stock subject  to such Option in
    effect immediately prior to the Effective Date divided by the Exchange Ratio
    (the price per share, as so determined, being rounded upward to the  nearest
    full  cent); and (iii)  all actions to  be taken thereunder  by the Board of
    Directors of MMI  or a  committee thereof  shall be  taken by  the Board  of
    Directors  of  ICI or  a committee  thereof.  No payment  shall be  made for
    fractional interests.  From  and  after  the  date  of  this  Agreement,  no
    additional  options shall be granted by MMI  under the MMI Stock Option Plan
    or otherwise.
 
        (b) It is intended that the assumed Options, as set forth herein,  shall
    not  give to any holder thereof any benefits in addition to those which such
    holder had  prior  to the  assumption  of the  Option.  ICI shall  take  all
    necessary  corporate action necessary  to reserve for  issuance a sufficient
    number of  shares of  ICI Common  Stock for  delivery upon  exercise of  the
    Options.  Prior to or as  soon as practicable after  the Effective Date, ICI
    shall file  a  registration  statement,  or  an  amendment  to  an  existing
    registration  statement, under the  Securities Act of  1933, as amended (the
    "Securities Act"), on Form S-8 (or other successor form) with respect to the
    shares of ICI Common Stock  subject to such Options  and shall use its  best
    efforts to maintain the effectiveness
 
                                      A-3
<PAGE>
    of such registration statement for so long as ICI shall be obligated to file
    reports under the Securities Exchange Act of 1934, as amended (the "Exchange
    Act"). In addition, ICI will cause such shares to be listed on the NMS.
 
        (c)  Approval  by  the  stockholders  of  MMI  of  this  Agreement shall
    constitute authorization  and  approval  of  any  and  all  of  the  actions
    described in this Section 2.4.
 
    2.5.  EXCHANGE AGENT.
 
        (a)  ICI shall  authorize SunTrust Bank,  Atlanta, Georgia,  to serve as
    exchange  agent  hereunder  (the  "Exchange  Agent").  Promptly  after   the
    Effective  Date, ICI shall deposit  or shall cause to  be deposited in trust
    with the Exchange Agent certificates representing the number of whole shares
    of ICI Common Stock  to which the  holders of MMI  Common Stock (other  than
    holders  of  Dissenting Shares)  are entitled  pursuant  to this  Article 2,
    together with cash sufficient to pay for fractional shares then known to ICI
    (such cash amounts  and certificates  being hereinafter referred  to as  the
    "Exchange   Fund").  The  Exchange  Agent  shall,  pursuant  to  irrevocable
    instructions received from ICI, deliver the  number of shares of ICI  Common
    Stock  and pay the amounts of cash provided for in this Article 2 out of the
    Exchange Fund. Additional amounts of cash, if any, needed from time to  time
    by  the  Exchange Agent  to  make payments  for  fractional shares  shall be
    provided by ICI  and shall become  part of the  Exchange Fund. The  Exchange
    Fund  shall not be  used for any  other purpose, except  as provided in this
    Agreement, or as otherwise agreed to by  ICI, Merger Corp. and MMI prior  to
    the Effective Date.
 
        (b)  As soon as practicable after the Effective Date, the Exchange Agent
    shall mail and otherwise  make available to each  record holder (other  than
    holders of Dissenting Shares) who, as of the Effective Date, was a holder of
    an  outstanding certificate or  certificates which immediately  prior to the
    Effective Date represented shares of MMI Common Stock (the  "Certificates"),
    a  form of letter of  transmittal and instructions for  use in effecting the
    surrender of the Certificates for  payment therefor and conversion  thereof,
    which  letter of transmittal  shall comply with all  applicable rules of the
    NMS. Delivery  shall  be  effected,  and  risk of  loss  and  title  to  the
    Certificates  shall pass, only  upon proper delivery  of the Certificates to
    the Exchange Agent and the form  of letter of transmittal shall so  reflect.
    Upon  surrender to the  Exchange Agent of a  Certificate, together with such
    letter of transmittal duly executed, the holder of such Certificate shall be
    entitled to receive  in exchange therefor  (i) one or  more certificates  as
    requested  by the  holder (properly  issued, executed  and countersigned, as
    appropriate) representing that number of whole shares of ICI Common Stock to
    which such holder of MMI Common Stock shall have become entitled pursuant to
    the provisions of this  Article 2, and  (ii) as to  any fractional share,  a
    check  representing the cash  consideration to which  such holder shall have
    become entitled pursuant to Section 2.2, and the Certificate so  surrendered
    shall  forthwith be cancelled.  No interest will  be paid or  accrued on the
    cash payable upon surrender of the Certificates. ICI shall pay any  transfer
    or  other  taxes  required  by  reason  of  the  issuance  of  a certificate
    representing shares  of  ICI  Common Stock;  provided,  however,  that  such
    certificate  is  issued  in  the  name  of  the  person  in  whose  name the
    Certificate  surrendered  in  exchange  therefor  is  registered;   provided
    further,  however, that ICI shall  not pay any transfer  or other tax if the
    obligation to  pay such  tax under  applicable  law is  solely that  of  the
    stockholder  or if payment of any such  tax by ICI otherwise would cause the
    Merger to fail to qualify  as a tax free  reorganization under the Code.  If
    any  portion of the consideration to be  received pursuant to this Article 2
    upon exchange of a Certificate (whether a certificate representing shares of
    ICI Common Stock or a check representing cash for a fractional share) is  to
    be  issued or  paid to  a person  other than  the person  in whose  name the
    Certificate surrendered in exchange  therefor is registered,  it shall be  a
    condition  of such issuance and payment  that the Certificate so surrendered
    shall be properly endorsed or otherwise  in proper form for transfer as  the
    Exchange  Agent may  require and  that the  person requesting  such exchange
    shall pay in advance any transfer or  other taxes required by reason of  the
    issuance of a certificate representing shares of ICI Common Stock or a check
    representing  cash for a fractional share to such other person, or establish
    to   the   satisfaction    of   the   Exchange    Agent   that   such    tax
 
                                      A-4
<PAGE>
    has  been paid or  that no such  tax is applicable.  From the Effective Date
    until surrender in accordance with the provisions of this Section 2.5,  each
    Certificate (other than Certificates representing treasury shares of MMI and
    Certificates   representing  Dissenting  Shares)  shall  represent  for  all
    purposes only the right  to receive the  consideration provided in  Sections
    2.1  and 2.2. No  dividends that are  otherwise payable on  ICI Common Stock
    will be paid  to persons  entitled to receive  ICI Common  Stock until  such
    persons  surrender their Certificates. After  such surrender, there shall be
    paid to  the person  in whose  name ICI  Common Stock  shall be  issued  any
    dividends on such ICI Common Stock that shall have a record date on or after
    the  Effective Date and prior to such surrender. If the payment date for any
    such dividend is  after the date  of such surrender,  such payment shall  be
    made on such payment date. In no event shall the persons entitled to receive
    such  dividends  be  entitled to  receive  interest on  such  dividends. All
    payments in  respect  of  shares  of  MMI Common  Stock  that  are  made  in
    accordance  with the terms hereof shall be  deemed to have been made in full
    satisfaction of all rights pertaining to such securities.
 
        (c) In the case of any lost, mislaid, stolen or destroyed  Certificates,
    the holder thereof may be required, as a condition precedent to the delivery
    to  such holder of the consideration described in this Article 2, to deliver
    to ICI a bond in such reasonable sum as ICI may direct as indemnity  against
    any  claim that may be made against the Exchange Agent, ICI or the Surviving
    Corporation with  respect to  the  Certificate alleged  to have  been  lost,
    mislaid, stolen or destroyed.
 
        (d)  After the Effective Date, there shall  be no transfers on the stock
    transfer books of  the Surviving  Corporation of  the shares  of MMI  Common
    Stock  that were  outstanding immediately prior  to the  Effective Date. If,
    after the  Effective  Date,  Certificates are  presented  to  the  Surviving
    Corporation  for transfer,  they shall  be cancelled  and exchanged  for the
    consideration described in this Article 2.
 
        (e) Any  portion of  the Exchange  Fund that  remains unclaimed  by  the
    stockholders  of  MMI  for six  months  after  the Effective  Date  shall be
    returned to ICI, upon demand, and any holder of MMI Common Stock who has not
    theretofore complied with Section 2.5(b)  shall thereafter look only to  ICI
    for  issuance  of  the  number  of shares  of  ICI  Common  Stock  and other
    consideration to  which such  holder has  become entitled  pursuant to  this
    Article  2; provided, however, that neither the Exchange Agent nor any party
    hereto shall be liable  to a holder  of shares of MMI  Common Stock for  any
    amount  required to be paid to a  public official pursuant to any applicable
    abandoned property, escheat or similar law.
 
    2.6.  ADJUSTMENT.  If,  between the date of  this Agreement and the  Closing
Date  or the Effective Date,  as the case may be,  (i) the outstanding shares of
MMI Common Stock or ICI  Common Stock shall have  been changed into a  different
number  of  shares  or  a  different  class  by  reason  of  any classification,
recapitalization, split-up, combination, exchange of shares, or readjustment  or
a stock dividend thereon shall be declared with a record date within such period
or  (ii) MMI shall have issued additional shares of MMI Common Stock (other than
upon the exercise of employee stock options granted prior to the date hereof) or
options or warrants  to purchase the  same, or securities  convertible into  the
same,  the number of  shares of ICI  Common Stock issued  pursuant to the Merger
shall be adjusted to accurately reflect such change (it being acknowledged  that
MMI  elsewhere herein covenants not to take  any of the actions described in (i)
or (ii) above).
 
                                   ARTICLE 3.
                     REPRESENTATIONS AND WARRANTIES OF MMI
 
    Except as set forth  on "MMI's Disclosure Schedule"  (which term shall  mean
the  written information delivered by MMI to  ICI prior to the execution of this
Agreement; provided,  that  information  shall  be deemed  to  be  disclosed  in
accordance  with a  given provision  of this Agreement  only to  the extent that
specific written  reference to  such  provision of  this  Agreement is  made  in
connection  with  the  disclosure  of  such  information  at  the  time  of such
delivery), MMI  hereby  represents and  warrants  to  ICI and  Merger  Corp.  as
follows:
 
                                      A-5
<PAGE>
    3.1.   ORGANIZATION  AND GOOD  STANDING OF MMI.   Each  of MMI  and the "MMI
Subsidiaries" (as  defined in  Section  3.2) is  a corporation  duly  organized,
validly  existing and in good standing under the laws of the jurisdiction of its
incorporation.  Accurate   and  complete   copies   of  MMI's   certificate   of
incorporation  and bylaws, in  each case as  in effect on  the date hereof, have
heretofore been delivered to ICI.
 
    3.2.     CAPITAL   STOCK   OF   MMI   SUBSIDIARIES   AND   OTHER   OWNERSHIP
INTERESTS.  MMI's Disclosure Schedule sets forth a true and complete list of all
corporations,  partnerships  and other  entities in  which  MMI owns  any equity
interest (the "MMI Subsidiaries"), the jurisdiction in which each MMI Subsidiary
is incorporated or organized, and all shares of capital stock or other ownership
interests authorized, issued and outstanding of each MMI Subsidiary. The  shares
of capital stock or other equity interests of each MMI Subsidiary have been duly
authorized  and are validly issued, fully paid and nonassessable and free of any
preemptive right. All shares of capital stock or other equity interests of  each
MMI  Subsidiary owned by MMI  or any of its subsidiaries  are set forth on MMI's
Disclosure Schedule and are owned by  MMI, either directly or indirectly as  set
forth  in MMI's Disclosure Schedule, free  and clear of all liens, encumbrances,
equities or claims.
 
    3.3.  FOREIGN QUALIFICATION.  MMI and each of the MMI Subsidiaries are  duly
qualified  or licensed  to do  business and  are in  good standing  as a foreign
corporation in every jurisdiction where the  failure so to qualify could have  a
material  adverse effect on  (a) the business,  operations, prospects, assets or
financial condition of MMI and the MMI Subsidiaries taken as a whole or (b)  the
validity  or enforceability of, or the ability of MMI to perform its obligations
under, this  Agreement and  the  other documents  contemplated hereby  (an  "MMI
Material Adverse Effect").
 
    3.4.   CORPORATE POWER AND AUTHORITY.   Each of MMI and the MMI Subsidiaries
has the corporate power and authority  and all licenses and permits required  by
governmental authorities to own, lease and operate its properties and assets and
to  carry on its  business as currently  being conducted. MMI  has the corporate
power and authority to  execute and deliver this  Agreement and the  agreements,
documents  and instruments contemplated  hereby and, subject  to the approval of
this Agreement and the  Merger by its stockholders,  to perform its  obligations
under  this Agreement and the other documents  executed or to be executed by MMI
in connection with this Agreement and  to consummate the Merger. The  execution,
delivery,  and  performance by  MMI of  this Agreement  and the  other documents
executed or to be executed  by MMI in connection  with this Agreement have  been
duly authorized by all necessary corporate action.
 
    3.5.  BINDING EFFECT.  This Agreement and the other documents executed or to
be executed by MMI in connection with this Agreement have been or will have been
duly  executed  and delivered  by  MMI and  are or  will  be, when  executed and
delivered, the  legal,  valid and  binding  obligations of  MMI  enforceable  in
accordance with their terms except that:
 
        (a)  enforceability may  be limited  by bankruptcy,  insolvency or other
    similar laws affecting creditors' rights;
 
        (b) the availability of equitable  remedies may be limited by  equitable
    principles of general applicability; and
 
        (c) rights to indemnification may be limited by considerations of public
    policy.
 
    3.6.   ABSENCE OF RESTRICTIONS AND CONFLICTS.   Subject only to the approval
of the  adoption of  this Agreement  and  the Merger  by MMI's  stockholders  as
described  in  Section  5.8 and  the  following  sentence of  this  Section, the
execution, delivery and performance  of this Agreement  and the other  documents
executed  or to  be executed by  MMI in  connection with this  Agreement and the
consummation of  the Merger  and  the other  transactions contemplated  by  this
Agreement and the fulfillment of and compliance with the terms and conditions of
this  Agreement do not and will  not, with the passing of  time or the giving of
notice or both,  violate or  conflict with, constitute  a breach  of or  default
under, result in the loss of any material benefit under, permit or result in the
acceleration  or termination of any obligation  under, or result in the creation
of any lien, security interest, charge or encumbrance
 
                                      A-6
<PAGE>
upon any of  the properties  or assets  of MMI or  any of  the MMI  Subsidiaries
under, (i) any term or provision of the Articles or Certificate of Incorporation
or  Bylaws of MMI  or any MMI  Subsidiary, (ii) any  "MMI Material Contract" (as
defined in  Section  3.13),  (iii) any  judgment,  decree,  permit,  concession,
license,  or order of any court or governmental authority or agency to which MMI
or any MMI Subsidiary is a party or  by which MMI, any MMI Subsidiary or any  of
their  respective properties  is bound or  (iv) any statute,  law, regulation or
rule applicable to  MMI or any  MMI Subsidiary. Except  for compliance with  the
applicable  requirements of the Hart-Scott-Rodino  Antitrust Improvements Act of
1976 (the "HSR Act"), the Securities Act, the Exchange Act, and applicable state
securities  laws,  no   consent,  approval,  order   or  authorization  of,   or
registration,  declaration or filing with, any  governmental agency or public or
regulatory unit, agency, body  or authority is required  in connection with  the
execution, delivery or performance of this Agreement by MMI, the consummation by
MMI  of the transactions  contemplated hereby or the  ownership and operation by
MMI of its business and properties after the Effective Date in substantially the
same manner as now owned and operated.
 
    3.7.  CAPITALIZATION OF MMI.
 
        (a) The authorized capital stock of MMI consists of 15,000,000 shares of
    common stock, $.01 par  value, and 1,000,000 shares  of preferred stock,  no
    par  value. As of  the date hereof,  there were (i)  4,596,886 shares of MMI
    Common Stock issued and  outstanding (not including  236,064 shares held  in
    the  treasury), (ii) no shares of  preferred stock, and (iii) 711,429 shares
    of MMI Common Stock reserved for  issuance upon the exercise of  outstanding
    Options granted under the MMI Option Plan, the terms of which are summarized
    in  MMI's Disclosure Schedule. No subsidiary of  MMI holds any shares of the
    capital stock of MMI. Since  February 29, 1996, MMI  has not (i) issued  any
    shares  of capital stock except pursuant to the exercise of then outstanding
    Options in accordance with their terms  or (ii) repurchased or redeemed  any
    shares of MMI capital stock.
 
        (b)  All of the issued  and outstanding shares of  MMI Common Stock have
    been duly authorized and  validly issued and  are fully paid,  nonassessable
    and free of preemptive rights.
 
        (c)  To  MMI's  knowledge,  there  are  no  voting  trusts,  stockholder
    agreements or other voting arrangements by the stockholders of MMI.
 
        (d) Except as set forth in subsection (a) above, there is no outstanding
    subscription,  contract,  convertible  or  exchangeable  security,   option,
    warrant,  call or other right  obligating MMI or any  of MMI Subsidiaries to
    issue, sell, exchange  or otherwise dispose  of, or to  purchase, redeem  or
    otherwise acquire, shares of, or securities convertible into or exchangeable
    for, capital stock of MMI or MMI Subsidiaries.
 
    3.8   MMI SEC REPORTS.   MMI has made available to  ICI and Merger Corp. (i)
MMI's Annual Reports  on Form  10-K, including  all exhibits  filed thereto  and
items  incorporated therein by  reference, (ii) MMI's  Quarterly Reports on Form
10-Q,  including  all  exhibits  thereto  and  items  incorporated  therein   by
reference, (iii) proxy statements relating to MMI's meetings of stockholders and
(iv)  all other reports  or registration statements  (as amended or supplemented
prior to  the  date hereof),  filed  by MMI  with  the Securities  and  Exchange
Commission  (the "SEC") since December 31,  1993, including all exhibits thereto
and items  incorporated  therein by  reference  (items (i)  through  (iv)  being
referred to as the "MMI SEC Reports"). As of their respective dates, the MMI SEC
Reports did not contain any 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, in light  of the circumstances under  which they were  made,
not  misleading. Since December 31,  1993, MMI has filed  all forms, reports and
documents with  the SEC  required to  be filed  by it  pursuant to  the  federal
securities  laws and  the SEC  rules and  regulations thereunder,  each of which
complied as to form, at the time such form, report or document was filed, in all
material respects with the applicable requirements of the Securities Act and the
Exchange Act and the applicable rules and regulations thereunder.
 
    3.9.  FINANCIAL STATEMENTS AND  RECORDS OF MMI.   MMI has made available  to
ICI  and Merger Corp. true, correct and  complete copies of (i) the consolidated
balance sheets of MMI and the MMI
 
                                      A-7
<PAGE>
Subsidiaries as of November 30, 1994 and 1995 and the consolidated statements of
income, stockholders' equity  and cash flows  for the fiscal  years then  ended,
including  the notes thereto,  in each case  examined by and  accompanied by the
report of KPMG Peat Marwick L.L.P. and  (ii) the unaudited balance sheet of  MMI
and  the MMI  Subsidiaries as  of February 29,  1996, and  the related unaudited
statements of income, stockholders' equity and cash flows for the fiscal quarter
then ended  (collectively the  "MMI Financial  Statements"). The  MMI  Financial
Statements  have been prepared from,  and are in accordance  with, the books and
records of MMI  and the  MMI Subsidiaries and  present fairly,  in all  material
respects,  the assets, liabilities and financial position of MMI as of the dates
thereof and the results of operations and changes in financial position  thereof
for  the periods then ended, in each  case in conformity with generally accepted
accounting principles,  consistently applied,  except  as noted  therein.  Since
November  30, 1995, there has been no change in accounting principles applicable
to, or  methods of  accounting utilized  by, MMI,  except as  noted in  the  MMI
Financial  Statements. The statements  of income and cash  flow contained in the
MMI Financial  Statements  do not  contain  any  material items  of  special  or
nonrecurring income, except as specifically identified therein. On or before the
20th  day of each calendar month following the date of this Agreement, MMI shall
deliver to ICI  unaudited financial  statements (including a  balance sheet  and
statements  of income and cash flow) as of the end of the previous month and for
the year  to  date. The  books  and  records of  MMI  have been  and  are  being
maintained  in  accordance  with  good  business  practice,  reflect  only valid
transactions, are complete  and correct  in all material  respects, and  present
fairly in all material respects the basis for the financial position and results
of operations of MMI set forth in the MMI Financial Statements.
 
    3.10.  ABSENCE OF CERTAIN CHANGES.  Since February 29, 1996, MMI and the MMI
Subsidiaries  have not, except as may  result from the transactions contemplated
by this Agreement:
 
        (a) suffered any change in the business, results of operations,  working
    capital,  assets, liabilities or  condition (financial or  otherwise) or the
    manner of conducting  the business of  MMI and MMI  Subsidiaries taken as  a
    whole,  except as reflected  on the MMI Financial  Statements and except for
    such changes that would not have an MMI Material Adverse Effect;
 
        (b) suffered any damage or destruction to  or loss of the assets of  MMI
    or  any MMI Subsidiary, whether or  not covered by insurance, which property
    or assets  are  material  to the  operations  or  business of  MMI  and  MMI
    Subsidiaries taken as a whole;
 
        (c)  forgiven, compromised,  canceled, released, waived  or permitted to
    lapse any material rights or claims;
 
        (d) entered into  or terminated  any material  agreement, commitment  or
    transaction, or agreed or made any changes in material leases or agreements,
    or suffered any of the foregoing to occur, other than renewals or extensions
    thereof and leases, agreements, transactions and commitments entered into in
    the  ordinary course of  business (excluding the  pending asset acquisitions
    described in the MMI Disclosure Schedule);
 
        (e) written  up, written  down or  written  off the  book value  of  any
    material amount of assets;
 
        (f) declared, paid or set aside for payment any dividend or distribution
    with respect to MMI's capital stock;
 
        (g)  redeemed,  purchased or  otherwise  acquired, or  sold,  granted or
    otherwise disposed of, directly or indirectly, any of MMI's capital stock or
    securities (other than shares  issued upon exercise of  the Options) or  any
    rights  to acquire such capital stock or securities, or agreed to changes in
    the terms and conditions of  any such rights outstanding  as of the date  of
    this Agreement;
 
        (h)  increased the compensation of or  paid any bonuses to any employees
    or contributed to any employee benefit  plan, other than in accordance  with
    established  policies, practices or requirements  and as provided in Section
    5.1 hereof;
 
                                      A-8
<PAGE>
        (i) entered into any employment, consulting, compensation or  collective
    bargaining   agreement  with  any  person   or  group,  or  experienced  any
    resignations  of,  or  had  any  terminations  or  disputes  involving   the
    employment  or  contract relationship  with any  of  its employees  or sales
    representatives which  could  have a  MMI  Material Adverse  Effect  on  the
    Surviving Corporation;
 
        (j)  entered into, adopted or amended any employee benefit plan;
 
        (k)  entered into any  transaction other than in  the ordinary course of
    business; or
 
        (l) entered into any agreement to do any of the foregoing.
 
    3.11.  NO  MATERIAL UNDISCLOSED LIABILITIES.   There are  no liabilities  or
obligations  of MMI  or the  MMI Subsidiaries  of any  nature, whether absolute,
accrued, contingent or  otherwise, other  than the  liabilities and  obligations
that  are  fully reflected,  accrued or  reserved against  in the  MMI Financial
Statements, for which the reserves  are appropriate and reasonable, or  incurred
in  the ordinary  course of  business and  consistent with  past practices since
February 29, 1996.
 
    3.12.  TAX RETURNS; TAXES.  Each  of MMI and the MMI Subsidiaries have  duly
and  timely filed all federal, state, county,  local and foreign tax returns and
reports required to  be filed  by it, including  those with  respect to  income,
payroll, property, withholding, social security, unemployment, franchise, excise
and  sales taxes and  all such returns and  reports are true  and correct in all
material respects; have either paid  in full all taxes  that have become due  as
reflected  on any return or  report and any interest  and penalties with respect
thereto or have fully accrued on its books or have established adequate reserves
for all  taxes  payable but  not  yet due;  and  have made  cash  deposits  with
appropriate  governmental authorities representing  estimated payments of taxes,
including income taxes and employee withholding tax obligations. No extension or
waiver of any statute of limitations or time within which to file any return has
been granted to or requested by MMI or the MMI Subsidiaries with respect to  any
tax.  No unsatisfied deficiency, delinquency or  default for any tax, assessment
or governmental charge has been claimed, proposed or assessed against MMI or the
MMI Subsidiaries, nor  has MMI or  the MMI Subsidiaries  received notice of  any
such  deficiency,  delinquency  or  default.  There  is  no  audit, examination,
deficiency or refund  litigation or matter  in controversy with  respect to  any
taxes.  MMI and the MMI Subsidiaries have no material tax liabilities other than
those reflected  on  the MMI  Financial  Statements  and those  arising  in  the
ordinary  course of business since February 29, 1996. MMI will make available to
ICI true, complete and correct copies of MMI's consolidated federal tax  returns
for  the last five years and make  available such other tax returns requested by
ICI.
 
    3.13.  MATERIAL CONTRACTS.  MMI will furnish or make available accurate  and
complete  copies of the MMI Material Contracts (as defined herein) applicable to
MMI or any of the MMI Subsidiaries to ICI. All of the MMI Material Contracts are
valid, binding  and enforceable.  There is  not under  any of  the MMI  Material
Contracts  any existing breach, default or event of default by MMI or any of the
MMI Subsidiaries nor  event that  with notice  or lapse  of time  or both  would
constitute  a breach,  default or  event of  default by  MMI or  any of  the MMI
Subsidiaries nor does MMI know of, and MMI has not received notice of, or made a
claim with respect to, any  breach or default by  any other party thereto  which
would,  severally or in the  aggregate, have an MMI  Material Adverse Effect. As
used herein, the  term "MMI  Material Contracts"  shall mean  all contracts  and
agreements filed, or required to be filed, as exhibits to MMI's Annual Report on
Form  10-K for the  year ended November  30, 1995, any  contracts and agreements
entered into since November 30, 1995 which  would be required to be filed as  an
exhibit  to MMI's Annual  Report on Form  10-K for the  year ending November 30,
1996, any note, bond, mortgage, indenture, license agreement, lease,  employment
agreement  or other  instrument or  obligation to  which any  of MMI  or the MMI
Subsidiaries is a party or  by which any of them  or any of their properties  or
assets  may be  subject. Except  as set  forth in  the MMI  Disclosure Schedule,
neither MMI nor any MMI Subsidiary is a party to any legally binding contract to
sell or purchase  goods or services  which is  not terminable on  less than  six
months  notice; any power of attorney;  any agreement containing covenants by it
not to compete or restricting  the customers from whom or  the area in which  it
may  solicit or conduct its business; any contract arrangement or commitment for
the acquisition of any other business or assets not made in the ordinary  course
of business; any contracts, arrangements
 
                                      A-9
<PAGE>
or  commitments for capital expenditures in  excess of $50,000 in the aggregate;
and any contract, arrangement  or commitment for payment  of severance or  other
fees to any existing or former employee, consultant or sales representative.
 
    3.14.  LITIGATION AND GOVERNMENT CLAIMS.  Except as disclosed in the MMI SEC
Reports,  there is no pending suit,  claim, action or litigation, whether civil,
criminal or  administrative, arbitration  or  other proceeding  or  governmental
investigation  or inquiry, or any pending change in any environmental, zoning or
building laws, regulations or ordinances against MMI or the MMI Subsidiaries  to
which  their businesses or assets  are subject which would,  severally or in the
aggregate, have an MMI Material Adverse  Effect. To the knowledge of MMI,  there
are  no such  proceedings threatened or  contemplated, or  any unasserted claims
(whether or not the potential claimant may be aware of the claim) of any  nature
that  might  be  asserted  against  MMI or  the  MMI  Subsidiaries  which would,
severally or in the aggregate, have an MMI Material Adverse Effect. Neither  MMI
nor  any MMI Subsidiary is subject to  any judgment, decree, injunction, rule or
order of any court, or any governmental restriction applicable to MMI or any MMI
Subsidiary which is reasonably likely (i) to have an MMI Material Adverse Effect
or (ii) to cause a material limitation on ICI's ability to operate the  business
of MMI after the Closing.
 
    3.15.   COMPLIANCE WITH  LAWS.  MMI  and the MMI  Subsidiaries each have all
material authorizations,  approvals,  licenses  and orders  to  carry  on  their
respective  businesses as  they are  now being conducted,  to own  or hold under
lease the properties and assets they own or hold under lease and to perform  all
of  their obligations under the agreements to which they are a party, except for
instances which would not have an MMI  Material Adverse Effect. MMI and the  MMI
Subsidiaries  have  been  and  are  in  compliance  with  all  applicable  laws,
regulations and administrative orders of  any country, state or municipality  or
of any subdivision of any thereof to which their respective businesses and their
employment  of labor or their use or  occupancy of properties or any part hereof
are subject, the failure to obtain or  the violation of which would have an  MMI
Material Adverse Effect.
 
    3.16.   EMPLOYEE BENEFIT PLANS.  Each employee benefit plan, as such term is
defined in Section 3(3) of the Employee Retirement Income Security Act of  1974,
as  amended ("ERISA"),  of MMI  or the  MMI Subsidiaries  (collectively the "MMI
Employee  Plans")  complies  in  all  material  respects  with  all   applicable
requirements  of ERISA and the Code, and  other applicable laws. None of the MMI
Employee Plans is an employee pension benefit plan subject to Title IV or Part 3
of Subtitle B of  Title I of ERISA  or a multiemployer plan,  as such terms  are
defined  in  ERISA.  Neither  MMI  nor any  MMI  Subsidiary,  nor  any  of their
respective directors, officers, employees or agents has, with respect to any MMI
Employee Plan, engaged in any "prohibited transaction," as such term is  defined
in  the Code or ERISA, nor has any  MMI Employee Plan engaged in such prohibited
transaction which could  result in any  taxes or penalties  or other  prohibited
transactions, which in the aggregate could have an MMI Material Adverse Effect.
 
    3.17.    LABOR  RELATIONS.   Each  of MMI  and  the MMI  Subsidiaries  is in
compliance in all respects with all  laws (including Federal and state laws  and
the   laws  of  another  country  or  governmental  entity  thereof)  respecting
employment and employment practices, terms  and conditions of employment,  wages
and  hours,  and is  not  engaged in  any  unfair labor  or  unlawful employment
practice, except  in any  case which  would  not have  an MMI  Material  Adverse
Effect.  There is no unlawful  employment practice discrimination charge pending
before the EEOC or EEOC recognized  state "referral agency." There is no  unfair
labor  practice charge or complaint  against MMI or any  of the MMI Subsidiaries
pending before  the National  Labor  Review Board.  There  is no  labor  strike,
dispute,  slowdown or  stoppage actually  pending or,  to the  knowledge of MMI,
threatened against or involving or affecting MMI or any of the MMI  Subsidiaries
and  no National  Labor Review  Board representation  question exists respecting
their respective employees. No grievances  or arbitration proceeding is  pending
and  no  written  claim  therefor  exists.  There  is  no  collective bargaining
agreement that is binding on MMI or any of the MMI Subsidiaries.
 
                                      A-10
<PAGE>
    3.18.  INTELLECTUAL  PROPERTY.   MMI and the  MMI Subsidiaries  own or  have
valid,  binding and  enforceable rights  to use  all patents,  trademarks, trade
names, service  marks,  service  names, copyrights,  applications  therefor  and
licenses  or other rights in respect  thereof ("MMI Intellectual Property") used
or held for use in connection with the business of MMI or the MMI  Subsidiaries,
without  any conflict with the rights of others, except for such conflicts as do
not have  an  MMI Material  Adverse  Effect. Neither  MMI  nor any  of  the  MMI
Subsidiaries  has received  any notice  from any  other person  pertaining to or
challenging the right  of MMI  or any  of the MMI  Subsidiaries to  use any  MMI
Intellectual Property or any trade secrets, proprietary information, inventions,
know-how,  processes and procedures owned or used  or licensed to MMI or the MMI
Subsidiaries.
 
    3.19.  PROPERTIES.   MMI and the MMI  Subsidiaries have good and  marketable
title,  free and clear of all liens,  claims or encumbrances (other than for the
MMI Material Contracts) to all of  their material properties and assets  whether
tangible  or intangible, real, personal or mixed, reflected on the MMI Financial
Statements as being owned by MMI or the MMI Subsidiaries. All buildings and  all
fixtures,  equipment and  other property  and assets  which are  material to its
business held under leases or  subleases by any of  MMI or the MMI  Subsidiaries
are held under valid instruments enforceable in accordance with their respective
terms. Substantially all of MMI's and MMI Subsidiaries' equipment and properties
have  been well maintained and are in good and serviceable condition, reasonable
wear and tear excepted.
 
    3.20.   INSURANCE.   MMI  and  each of  the  MMI Subsidiaries  is  presently
insured,  and during each of  the past five (5)  calendar years has been insured
for reasonable  amounts  against such  risks  as companies  engaged  in  similar
business  would,  in  accordance  with good  business  practice,  customarily be
insured. At all times since  the date of this  Agreement, MMI has maintained  in
effect its directors' and officers' liability insurance policy.
 
    3.21.    ENVIRONMENTAL  MATTERS.    MMI  and  the  MMI  Subsidiaries  are in
compliance with all applicable federal,  state, local and foreign laws  relating
to   emissions,  discharges  and  releases   of  hazardous  materials  into  the
environment and the generation, treatment, storage, transportation and  disposal
of  hazardous waste, including, without limitation, any applicable provisions of
the Resource  Conservation  and  Recovery  Act  of  1976  or  the  Comprehensive
Environmental  Response, Compensation and Liability Act of 1980, except as would
not cause a MMI Material Adverse Effect.  There are no conditions at, on,  under
or related to any real property owned or operated by MMI or the MMI Subsidiaries
which presently or potentially poses a significant hazard to human health or the
environment,  and  there  has  been  no  production,  use,  treatment,  storage,
transportation or  disposal  by  MMI or  any  of  the MMI  Subsidiaries  of  any
Hazardous  Substance  (as hereinbelow  defined)  nor any  release  or threatened
release by MMI or  any MMI subsidiary of  any Hazardous Substance. No  Hazardous
Substance  is now  or ever  has been stored  by MMI  or the  MMI Subsidiaries in
underground tanks, pits or surface impoundments. For purposes of the  foregoing,
the  term "Hazardous Substance" means any hazardous or toxic substance, material
or waste  (including, without  limitation, petroleum  products and  by-products)
which is regulated by any applicable federal, state, local or foreign authority.
 
    3.22.     REGISTRATION  OBLIGATIONS.    Neither  MMI  nor  any  of  the  MMI
Subsidiaries is  under  any  obligation, contingent  or  otherwise,  which  will
survive the Merger to register any of its securities under the Securities Act.
 
    3.23.   STATE TAKEOVER  LAWS.  MMI  and the MMI  Subsidiaries have taken all
steps to  exempt  the transactions  contemplated  by this  Agreement,  and  this
Agreement  is  not  subject to,  any  applicable state  takeover  law including,
without limitation, DGCL Section 203.
 
    3.24.  ACCOUNTING, TAX AND REGULATORY MATTERS.   Neither MMI nor any of  the
MMI  Subsidiaries has taken or agreed to take any action or has any knowledge of
any fact  or  circumstances that  would  prevent the  transactions  contemplated
hereby  from qualifying  for pooling  of interest  accounting treatment  or as a
reorganization within the meaning of Section 368 of the Code.
 
                                      A-11
<PAGE>
    3.25.  ACCURACY OF DISCLOSURES.  None of the information supplied by MMI  or
any  MMI  Subsidiary  for  inclusion  in  the  Registration  Statement  or Proxy
Statement (as such terms are  defined in Section 5.7) will,  in the case of  the
Proxy Statement or any amendments or supplements thereto, at the time of mailing
of  the Proxy Statement  and any amendments  or supplements thereto,  and at the
time of the meeting of stockholders of  MMI in accordance therewith, or, in  the
case  of the Registration Statement at the  time it becomes effective and at the
Effective Date, contain any untrue statement of a material fact or omit to state
any material fact required to  be stated therein or  necessary in order to  make
the statements therein, in light of the circumstances under which they are made,
not  misleading.  The  Registration Statement  will  comply  as to  form  in all
material respects with the provisions of  the Securities Act, and the rules  and
regulations  promulgated thereunder. The Proxy Statement  will comply as to form
in all material respects with the provisions  of the Exchange Act and the  rules
and regulations thereunder.
 
    3.26.   BROKERS AND FINDERS.  None of MMI, the MMI Subsidiaries or, to MMI's
knowledge, any  of  their  respective  officers,  directors  and  employees  has
employed any broker, finder or investment bank or incurred any liability for any
investment  banking fees,  financial advisory  fees, brokerage  fees or finders'
fees in connection with  the transactions contemplated  hereby, except that  MMI
has  engaged Goldman,  Sachs &  Co. as financial  advisor pursuant  to a written
agreement, a true and complete  copy of which has  been delivered to ICI.  Other
than  the foregoing arrangements and other than certain fees that may be paid to
ICI's financial advisor as contemplated by Section 4.24 hereof, MMI is not aware
of any claim for payment of any finder's fees, brokerage or agent's  commissions
or  other  like payments  in connection  with the  negotiations leading  to this
Agreement or the consummation of  the transactions contemplated hereby. MMI  has
delivered to ICI all contracts, agreements and documents, including summaries of
oral agreements, that relate to the engagement of and the payment of fees to its
financial advisors.
 
    3.27.   OPINION OF  FINANCIAL ADVISOR.   MMI has received  (and upon receipt
thereof will promptly  deliver to ICI  a photocopy thereof)  the opinion of  its
financial  advisor (addressed solely to the MMI Board of Directors and not to be
relied upon by any other person) to the effect that, as of the date of amendment
of this Agreement,  the Exchange  Ratio is  fair to  the holders  of MMI  Common
Stock.
 
                                   ARTICLE 4.
             REPRESENTATIONS AND WARRANTIES OF ICI AND MERGER CORP.
 
    Except  as set forth  on "ICI's Disclosure Schedule"  (which term shall mean
the written information delivered by ICI to  MMI prior to the execution of  this
Agreement;  provided,  that  information  shall be  deemed  to  be  disclosed in
accordance with a  given provision  of this Agreement  only to  the extent  that
specific  written  reference to  such  provision of  this  Agreement is  made in
connection with  the  disclosure  of  such  information  at  the  time  of  such
delivery), ICI and Merger Corp. hereby represent and warrant to MMI as follows:
 
    4.1.   ORGANIZATION AND GOOD STANDING OF ICI.  Each of ICI, Merger Corp. and
the ICI  Subsidiaries  (as  defined  in  Section  4.2)  is  a  corporation  duly
organized,  validly  existing  and  in  good  standing  under  the  laws  of the
jurisdiction of  its  incorporation.  Accurate  and  complete  copies  of  ICI's
articles  of incorporation  and bylaws, in  each case  as in effect  on the date
hereof, have heretofore been delivered to MMI.
 
    4.2.     CAPITAL   STOCK   OF   ICI   SUBSIDIARIES   AND   OTHER   OWNERSHIP
INTERESTS.  ICI's Disclosure Schedule sets forth a true and complete list of all
corporations,  partnerships  and other  entities in  which  ICI owns  any equity
interest (the "ICI Subsidiaries"), the jurisdiction in which each ICI Subsidiary
is incorporated or organized, and all shares of capital stock or other ownership
interests authorized, issued and outstanding of each ICI Subsidiary. The  shares
of capital stock or other equity interests of each ICI Subsidiary have been duly
authorized and are validly issued, fully paid and nonassessable.
 
                                      A-12
<PAGE>
    4.3.   FOREIGN QUALIFICATION.  ICI and each of the ICI Subsidiaries are duly
qualified or licensed  to do  business and  are in  good standing  as a  foreign
corporation  in every jurisdiction where the failure  so to qualify could have a
material adverse effect on  (a) the business,  operations, prospects, assets  or
financial  condition of ICI and the ICI Subsidiaries taken as a whole or (b) the
validity or enforceability of, or the ability of ICI to perform its  obligations
under,  this  Agreement and  the other  documents  contemplated hereby  (an "ICI
Material Adverse Effect").
 
    4.4.  CORPORATE POWER AND AUTHORITY.   Each of ICI and the ICI  Subsidiaries
has  the corporate power and authority and  all licenses and permits required by
governmental authorities to own, lease and operate its properties and assets and
to carry on its business  as currently being conducted.  Each of ICI and  Merger
Corp.  has  the  corporate  power  and authority  to  execute  and  deliver this
Agreement and, except as set forth  in ICI's Disclosure Schedule and subject  to
obtaining any requisite ICI shareholder approval required for listing ICI Common
Stock  on NMS,  to perform  its obligations under  this Agreement  and the other
documents executed or to  be executed by ICI  in connection with this  Agreement
and to consummate the Merger. Except as set forth in the preceding sentence, the
execution,  delivery, and performance by ICI  and Merger Corp. of this Agreement
and the other documents executed  or to be executed by  ICI or Merger Corp.,  as
applicable,  in connection with this Agreement  have been duly authorized by all
necessary corporate action.
 
    4.5.  BINDING EFFECT.  This Agreement and the other documents executed or to
be executed by ICI and Merger Corp. in connection with this Agreement have  been
or will have been duly executed and delivered by ICI and Merger Corp. and are or
will  be, when executed and delivered,  the legal, valid and binding obligations
of ICI and Merger Corp., enforceable in accordance with their terms except that:
 
        (a) enforceability may  be limited  by bankruptcy,  insolvency or  other
    similar laws affecting creditors' rights;
 
        (b)  the availability of equitable remedies  may be limited by equitable
    principles of general applicability; and
 
        (c) rights to indemnification may be limited by considerations of public
    policy.
 
    4.6.  ABSENCE OF RESTRICTIONS AND CONFLICTS.  The consummation of the Merger
and the other transactions contemplated by this Agreement and the fulfillment of
and compliance with the terms and conditions  of this Agreement do not and  will
not,  with the  passing of  time or  the giving  of notice  or both,  violate or
conflict with, constitute a breach  of or default under,  result in the loss  of
any  material benefit under, permit or result in the acceleration or termination
of any  obligation  under, or  result  in the  creation  of any  lien,  security
interest,  charge or encumbrance upon any of  the properties or assets of ICI or
any of the ICI Subsidiaries under, (i) any term or provision of the Articles  or
Certificate  of Incorporation or Bylaws  of ICI or any  ICI Subsidiary, (ii) any
"ICI Material  Contract"  (as defined  in  Section 4.13),  (iii)  any  judgment,
decree,  permit,  concession,  license or  order  of any  court  or governmental
authority or agency to which  ICI or any ICI Subsidiary  is a party or by  which
ICI,  any ICI Subsidiary or any of their respective properties is bound, or (iv)
any statute, law, regulation  or rule applicable to  ICI or any ICI  Subsidiary.
Except  for  compliance with  the applicable  requirements of  the HSR  Act, the
Securities Act, the Exchange Act, the NMS and applicable state securities  laws,
no consent, approval, order or authorization of, or registration, declaration or
filing  with, any governmental agency or public or regulatory unit, agency, body
or  authority  is  required  in  connection  with  the  execution,  delivery  or
performance   of  this  Agreement  by  ICI,  the  consummation  by  ICI  of  the
transactions contemplated hereby or  the ownership and operation  of MMI by  ICI
after  the Effective  Date in  substantially the  same manner  as now  owned and
operated.
 
                                      A-13
<PAGE>
    4.7.  CAPITALIZATION OF ICI.
 
        (a)  The authorized capital stock of  ICI consists of 100,000,000 shares
    of ICI Common  Stock, $.001 par  value; and 10,000,000  shares of  preferred
    stock,  no par value. As of the date hereof, there are (i) 30,546,186 shares
    of  Common  Stock  outstanding,  (ii)  no  shares  of  the  Preferred  Stock
    outstanding,  and  (iii) 2,756,886  shares  reserved for  issuance  upon the
    exercise of  outstanding options  (the "ICI  Options") granted  under  ICI's
    stock option plans.
 
        (b)  All of the issued  and outstanding shares of  ICI Common Stock have
    been duly authorized and  validly issued and  are fully paid,  nonassessable
    and free of preemptive rights.
 
        (c)  To  ICI's  knowledge,  there  are  no  voting  trusts,  stockholder
    agreements or other voting arrangements by the stockholders of ICI.
 
        (d) Except as set forth in subsection (a) above, there is no outstanding
    subscription,  contract,  convertible  or  exchangeable  security,   option,
    warrant,  call or other right obligating ICI  or any of the ICI Subsidiaries
    to issue, sell, exchange or otherwise dispose of, or to purchase, redeem  or
    otherwise acquire, shares of, or securities convertible into or exchangeable
    for, capital stock of ICI or the ICI Subsidiaries.
 
    4.8.   ICI  SEC REPORTS.   ICI has  made available  to MMI  (i) ICI's Annual
Reports  on  Form  10-K,  including   all  exhibits  filed  thereto  and   items
incorporated  therein by reference,  (ii) ICI's Quarterly  Reports on Form 10-Q,
including all  exhibits thereto  and items  incorporated therein  by  reference,
(iii)  proxy statements relating to ICI's  meetings of stockholders and (iv) all
other reports or registration  statements (as amended  or supplemented prior  to
the  date hereof), filed by ICI with  the SEC since December 31, 1993, including
all exhibits  thereto and  items incorporated  therein by  reference (items  (i)
through (iv) being referred to as the "ICI SEC Reports"). As of their respective
dates,  the ICI SEC Reports  did not contain any  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, in  light of the circumstances under which  they
were  made, not misleading. Since December 31,  1993, ICI has filed all material
forms, reports and documents with the SEC required to be filed by it pursuant to
the federal securities laws and the  SEC rules and regulations thereunder,  each
of  which complied  as to form,  at the time  such form, report  or document was
filed, in  all  material  respects  with  the  applicable  requirements  of  the
Securities  Act and  the Exchange Act  and the applicable  rules and regulations
thereunder.
 
    4.9.  FINANCIAL STATEMENTS AND  RECORDS OF ICI.   ICI has made available  to
MMI  true, correct and complete copies of (i) the consolidated balance sheets of
ICI and  the  ICI  Subsidiaries as  of  December  31, 1994  and  1995,  and  the
consolidated  statements of income, stockholders' equity  and cash flows for the
fiscal years then ended, including the  notes thereto, in each case examined  by
and  accompanied by the report of Deloitte  & Touche LLP, and (ii) the unaudited
consolidated balance sheet of ICI and the ICI Subsidiaries as of March 31,  1996
and  related  the  unaudited consolidated  statements  of  income, shareholders'
equity and  cash  flow  for  the quarter  then  ended  (collectively,  the  "ICI
Financial  Statements"). The ICI  Financial Statements have  been prepared from,
and are  in  accordance  with,  the  books  and  records  of  ICI  and  the  ICI
Subsidiaries   and  present  fairly,  in  all  material  respects,  the  assets,
liabilities and  financial position  of ICI  as  of the  dates thereof  and  the
results  of operations and changes in financial position thereof for the periods
then ended,  in  each case  in  conformity with  generally  accepted  accounting
principles,  consistently applied, except  as noted therein.  Since December 31,
1995, there  has been  no  change in  accounting  principles applicable  to,  or
methods  of accounting utilized  by, ICI, except  as noted in  the ICI Financial
Statements or as is required under generally accepted accounting principles. The
statements of income and cash flow contained in the ICI Financial Statements  do
not  contain any  material items  of special  or nonrecurring  income, except as
specifically identified therein.  On or  before the  20th day  of each  calendar
month  following the date of this Agreement,  ICI shall deliver to MMI unaudited
financial statements (including  a balance  sheet and statements  of income  and
cash  flow) as of the  end of the previous  month and for the  year to date. The
books and records of ICI have been  and are being maintained in accordance  with
good business
 
                                      A-14
<PAGE>
practice,  reflect  only valid  transactions, are  complete  and correct  in all
material respects, and present fairly in all material respects the basis for the
financial position  and  results of  operations  of ICI  set  forth in  the  ICI
Financial Statements.
 
    4.10.  ABSENCE OF CERTAIN CHANGES.  Since December 31, 1995, ICI and the ICI
Subsidiaries  have not, except as may  result from the transactions contemplated
by this Agreement:
 
        (a) suffered any  material adverse  change in the  business, results  of
    operations,  working capital, assets, liabilities or condition (financial or
    otherwise) or  the  manner  of  conducting  the  business  of  ICI  and  ICI
    Subsidiaries  taken as  a whole,  except as  reflected on  the ICI Financial
    Statements and except for such changes  that would not have an ICI  Material
    Adverse Effect;
 
        (b)  suffered any damage or destruction to  or loss of the assets of ICI
    or any ICI Subsidiary, whether or  not covered by insurance, which would  be
    expected to result in an ICI Material Adverse Effect;
 
        (c)  forgiven, compromised,  canceled, released, waived  or permitted to
    lapse any material rights or claims;
 
        (d) entered into  or terminated  any material  agreement, commitment  or
    transaction, or agreed or made any changes in material leases or agreements,
    or suffered any of the foregoing to occur, other than renewals or extensions
    thereof and leases, agreements, transactions and commitments entered into in
    the ordinary course of business, except in any such case as does not have an
    ICI Material Adverse Effect;
 
        (e)  written  up, written  down or  written  off the  book value  of any
    material amount of assets;
 
        (f) declared, paid or set aside for payment any dividend or distribution
    with respect to ICI's capital stock;
 
        (g) redeemed,  purchased  or otherwise  acquired,  or sold,  granted  or
    otherwise disposed of, directly or indirectly, any of ICI's capital stock or
    securities  (other than shares  issued upon exercise of  the ICI Options) or
    any rights to acquire such capital stock or securities, or agreed to changes
    in the terms and conditions of any such rights outstanding as of the date of
    this Agreement, except as provided in Section 5.2 hereof;
 
        (h) increased the compensation of or  paid any bonuses to any  employees
    or  contributed to any employee benefit  plan, other than in accordance with
    established policies, practices  or requirements and  except as provided  in
    Section 5.2 hereof;
 
        (i)  entered into any employment, consulting, compensation or collective
    bargaining agreement with any person or group, except in any such case which
    does not have an ICI Material Adverse Effect on the Surviving Corporation;
 
        (j)  entered into, adopted or  amended any employee benefit plan  except
    in any such case as does not have an ICI Material Adverse Effect; or
 
        (k) entered into any agreement to do any of the foregoing.
 
    4.11.   NO  MATERIAL UNDISCLOSED LIABILITIES.   There are  no liabilities or
obligations of ICI  or the  ICI Subsidiaries  of any  nature, whether  absolute,
accrued, contingent or otherwise, other than:
 
        (a) the liabilities and obligations that are fully reflected, accrued or
    reserved against in the ICI Financial Statements, for which the reserves are
    appropriate  and reasonable, or incurred in  the ordinary course of business
    and consistent with past practices since December 31, 1995; or
 
        (b) liabilities  or  obligations  not inconsistent  with  the  terms  of
    Section 5.2.
 
    4.12.   TAX RETURNS; TAXES.  Each of  ICI and the ICI Subsidiaries have duly
and timely filed all federal, state,  county, local and foreign tax returns  and
reports  required to  be filed  by it, including  those with  respect to income,
payroll, property, withholding, social security, unemployment, franchise, excise
and sales taxes and  all such returns  and reports are true  and correct in  all
material respects;
 
                                      A-15
<PAGE>
have  either paid  in full all  taxes that have  become due as  reflected on any
return or report  and any interest  and penalties with  respect thereto or  have
fully  accrued on its books or have  established adequate reserves for all taxes
payable  but  not  yet  due;  and  have  made  cash  deposits  with  appropriate
governmental  authorities  representing estimated  payments of  taxes, including
income taxes and employee  withholding tax obligations. Except  as set forth  in
ICI's Disclosure Schedule, no unsatisfied deficiency, delinquency or default for
any  tax,  assessment  or  governmental charge  has  been  claimed,  proposed or
assessed  against  ICI  or  the  ICI  Subsidiaries,  nor  has  ICI  or  the  ICI
Subsidiaries  received notice  of any  such deficiency,  delinquency or default.
Except  as  set  forth  in  ICI's  Disclosure  Schedule,  there  is  no   audit,
examination,  deficiency  or refund  litigation  or matter  in  controversy with
respect to  any  taxes.  ICI and  the  ICI  Subsidiaries have  no  material  tax
liabilities other than those reflected on the ICI Financial Statements and those
arising  in the ordinary course of business  since March 31, 1996. ICI will make
available to MMI true, complete and correct copies of ICI's consolidated federal
tax returns for the last  five years and make  available such other tax  returns
requested by MMI.
 
    4.13.   MATERIAL CONTRACTS.  ICI will furnish or make available accurate and
complete copies of the ICI  Material Contracts to MMI.  All of the ICI  Material
Contracts  are valid, binding and enforceable. There is not under any of the ICI
Material Contracts any existing  breach, default or event  of default by ICI  or
any  of the ICI Subsidiaries nor event that with notice or lapse of time or both
would constitute a breach, default or event of default by ICI or any of the  ICI
Subsidiaries nor does ICI know of, and ICI has not received notice of, or made a
claim  with respect to, any  breach or default by  any other party thereto which
would, severally or in  the aggregate, have an  ICI Material Adverse Effect.  As
used  herein, the term "ICI Material Contracts"  shall mean all of contracts and
agreements filed, or required to be filed, as exhibits to ICI's Annual Report on
Form 10-K for the  year ended December  31, 1995 and  any contract or  agreement
entered  into since December 31, 1995 which would  be required to be filed as an
exhibit to ICI's Annual  Report on Form  10-K for the  year ending December  31,
1996,  any note, bond, mortgage, indenture, license agreement, lease, employment
agreement or other  instrument or  obligation to  which any  of ICI  or the  ICI
Subsidiaries  is a party or by  which any of them or  any of their properties or
assets may be subject.
 
    4.14.  LITIGATION AND GOVERNMENT CLAIMS.  Except as disclosed in the ICI SEC
Reports, there is no pending suit,  claim, action or litigation, whether  civil,
criminal  or  administrative, arbitration  or  other proceeding  or governmental
investigation or inquiry, or any pending change in any environmental, zoning  or
building  laws, regulations or ordinances against ICI or the ICI Subsidiaries to
which their businesses or  assets are subject which  would, severally or in  the
aggregate,  reasonably be expected to result  in an ICI Material Adverse Effect.
To  the  knowledge  of  ICI,  there  are  no  such  proceedings  threatened   or
contemplated,  or any unasserted  claims (whether or  not the potential claimant
may be aware of the claim) of any  nature that might be asserted against ICI  or
the  ICI Subsidiaries which  would, severally or  in the aggregate,  have an ICI
Material Adverse Effect. Neither  ICI nor any ICI  Subsidiary is subject to  any
judgment,  decree, injunction, rule  or order of any  court, or any governmental
restriction applicable to ICI or any  ICI Subsidiary which is reasonably  likely
(i)  to  have  an  ICI Material  Adverse  Effect  or (ii)  to  cause  a material
limitation on ICI's ability to operate the business of MMI after the Closing.
 
    4.15.  COMPLIANCE WITH  LAWS.  ICI  and the ICI  Subsidiaries each have  all
material  authorizations,  approvals,  licenses  and orders  to  carry  on their
respective businesses as  they are  now being conducted,  to own  or hold  under
lease  the properties and assets they own or hold under lease and to perform all
of their obligations under the agreements to which they are a party, except  for
instances  which would not have an ICI  Material Adverse Effect. ICI and the ICI
Subsidiaries  have  been  and  are  in  compliance  with  all  applicable  laws,
regulations  and administrative orders of any  country, state or municipality or
of any subdivision of any thereof to which their respective businesses and their
employment of labor or their use or  occupancy of properties or any part  hereof
are  subject, the failure to obtain or the  violation of which would have an ICI
Material Adverse Effect.
 
                                      A-16
<PAGE>
    4.16.  EMPLOYEE BENEFIT PLANS.  Each employee benefit plan, as such term  is
defined  in Section 3(3) of ERISA, of  ICI or the ICI Subsidiaries (collectively
the "ICI Employee Plans") complies in all material respects with all  applicable
requirements  of ERISA and the  Code and other applicable  laws. None of the ICI
Employee Plans is an employee pension benefit plan subject to Title IV or Part 3
of Subtitle B of  Title I of ERISA  or a multiemployer plan,  as such terms  are
defined  in  ERISA.  Neither  ICI  nor any  ICI  Subsidiary,  nor  any  of their
respective directors, officers, employees or agents has, with respect to any ICI
Employee Plan, engaged in any "prohibited transaction," as such term is  defined
in  the Code or ERISA, nor has any  ICI Employee Plan engaged in such prohibited
transaction which could  result in any  taxes or penalties  or other  prohibited
transactions, which in the aggregate could have an ICI Material Adverse Effect.
 
    4.17.    LABOR  RELATIONS.   Each  of ICI  and  the ICI  Subsidiaries  is in
compliance in all respects with all federal and state laws respecting employment
and employment practices, terms and  conditions of employment, wages and  hours,
and  is not engaged in any unfair  labor or unlawful employment practice, except
in any case which  would not have  an ICI Material Adverse  Effect. There is  no
unlawful  employment practice discrimination  charge pending before  the EEOC or
EEOC recognized  state "referral  agency."  There is  no unfair  labor  practice
charge  or complaint against ICI  or any of the  ICI Subsidiaries pending before
the National Labor Review Board. There is no labor strike, dispute, slowdown  or
stoppage  actually pending  or, to the  knowledge of ICI,  threatened against or
involving or affecting ICI or any of the ICI Subsidiaries and no National  Labor
Review   Board  representation  question   exists  respecting  their  respective
employees. No grievances  or arbitration  proceeding is pending  and no  written
claim  therefor exists, except in any case  which would not have an ICI Material
Adverse Effect.
 
    4.18.  INTELLECTUAL  PROPERTY.   ICI and the  ICI Subsidiaries  own or  have
valid,  binding and  enforceable rights  to use  all patents,  trademarks, trade
names, service  marks,  service  names, copyrights,  applications  therefor  and
licenses  or other rights in respect  thereof ("ICI Intellectual Property") used
or held for use in connection with the business of ICI or the ICI  Subsidiaries,
without  any conflict with the rights of others, except for such conflicts as do
not have  an  ICI Material  Adverse  Effect. Neither  ICI  nor any  of  the  ICI
Subsidiaries  has received  any notice  from any  other person  pertaining to or
challenging the right  of ICI  or any  of the ICI  Subsidiaries to  use any  ICI
Intellectual Property or any trade secrets, proprietary information, inventions,
know-how,  processes and procedures owned or used  or licensed to ICI or the ICI
Subsidiaries, except with respect to rights  the loss of which, individually  or
in the aggregate, would not have an ICI Material Adverse Effect.
 
    4.19.   PROPERTIES.  ICI  and the ICI Subsidiaries  have good and marketable
title, free and clear of all liens,  claims or encumbrances (other than for  the
ICI  Material Contracts) to all of  their material properties and assets whether
tangible or intangible, real, personal or mixed, reflected on the ICI  Financial
Statements  as being owned by ICI or the ICI Subsidiaries. All buildings and all
fixtures, equipment and  other property  and assets  which are  material to  its
business  held under leases or  subleases by any of  ICI or the ICI Subsidiaries
are held under valid instruments enforceable in accordance with their respective
terms. Substantially all of ICI's and ICI Subsidiaries' equipment and properties
have been well maintained and are in good and serviceable condition,  reasonable
wear and tear excepted.
 
    4.20.    INSURANCE.   ICI  and each  of  the ICI  Subsidiaries  is presently
insured, and during each of  the past five (5)  calendar years has been  insured
for  reasonable  amounts  against such  risks  as companies  engaged  in similar
business would,  in  accordance  with good  business  practice,  customarily  be
insured.
 
    4.21.    ENVIRONMENTAL  MATTERS.    ICI  and  the  ICI  Subsidiaries  are in
compliance with all applicable federal,  state, local and foreign laws  relating
to   emissions,  discharges  and  releases   of  hazardous  materials  into  the
environment and the generation, treatment, storage, transportation and  disposal
of  hazardous waste, including, without limitation, any applicable provisions of
the Resource  Conservation  and  Recovery  Act  of  1976  or  the  Comprehensive
Environmental Response, Compensation and
 
                                      A-17
<PAGE>
Liability Act of 1980, except as would not cause an ICI Material Adverse Effect.
There  are no conditions at, on, under or  related to any real property owned or
operated by ICI or the ICI  Subsidiaries which presently or potentially poses  a
significant  hazard to human  health or the  environment, and there  has been no
production, use, treatment, storage, transportation or disposal by ICI or any of
the ICI Subsidiaries of any Hazardous Substance (as hereinbelow defined) nor any
release or threatened  release by  ICI or any  ICI subsidiary  of any  Hazardous
Substance.  No Hazardous Substance is now or ever  has been stored by ICI or the
ICI Subsidiaries  in  underground  tanks,  pits  or  surface  impoundments.  For
purposes of the foregoing, the term "Hazardous Substance" means any hazardous or
toxic  substance, material  or waste  (including, without  limitation, petroleum
products and by-products) which is  regulated by any applicable federal,  state,
local or foreign authority.
 
    4.22.   ACCOUNTING, TAX AND REGULATORY MATTERS.   Neither ICI nor any of the
ICI Subsidiaries has taken or agreed to take any action or has any knowledge  of
any  fact  or circumstances  that  would prevent  the  transactions contemplated
hereby from qualifying  for pooling  of interest  accounting treatment  or as  a
reorganization within the meaning of Section 368 of the Code.
 
    4.23.   ACCURACY OF DISCLOSURES.  None of the information supplied by ICI or
any ICI  Subsidiary  for  inclusion  in  the  Registration  Statement  or  Proxy
Statement  will,  in  the case  of  the  Proxy Statement  or  any  amendments or
supplements thereto,  at the  time of  mailing of  the Proxy  Statement and  any
amendments   or  supplements  thereto,  and  at  the  time  of  the  meeting  of
stockholders of MMI in accordance therewith, or, in the case of the Registration
Statement at the time  it becomes effective and  at the Effective Date,  contain
any  untrue statement  of a  material fact  or omit  to state  any material fact
required to  be stated  therein or  necessary in  order to  make the  statements
therein,  in  light  of  the  circumstances  under  which  they  are  made,  not
misleading. The Registration Statement  will comply as to  form in all  material
respects  with  the  provisions  of  the  Securities  Act,  and  the  rules  and
regulations promulgated thereunder. The Proxy  Statement will comply as to  form
in  all material respects with the provisions  of the Exchange Act and the rules
and regulations thereunder.
 
    4.24.  BROKERS AND FINDERS.  None of ICI, the ICI Subsidiaries or, to  ICI's
knowledge,  any  of  their  respective  officers,  directors  and  employees has
employed any broker, finder or investment bank or incurred any liability for any
investment banking fees,  financial advisory  fees, brokerage  fees or  finders'
fees  in connection with  the transactions contemplated  hereby, except that ICI
has engaged Morgan Keegan & Company,  Inc. as its financial advisor. Other  than
the foregoing arrangements and other than certain fees that may be paid to MMI's
financial  advisors as contemplated by Section 3.26  hereof, ICI is not aware of
any claim for payment of any finder's fees, brokerage or agent's commissions  or
other  like  payments  in  connection  with  the  negotiations  leading  to this
Agreement or the consummation of the transactions contemplated hereby.
 
                                   ARTICLE 5.
                        CERTAIN COVENANTS AND AGREEMENTS
 
    5.1.  CONDUCT OF  BUSINESS BY MMI.   From the date  hereof to the  Effective
Date,  MMI will, and  will cause each  MMI Subsidiary to,  except as required in
connection with  the Merger  and  the other  transactions contemplated  by  this
Agreement  and except  as otherwise  disclosed in  MMI's Disclosure  Schedule or
consented to in writing by ICI:
 
        (a) Carry  on  its  business  in the  ordinary  and  regular  course  in
    substantially  the same manner as heretofore conducted and not engage in any
    new line of business or enter into any agreement, transaction or activity or
    make any  commitment except  those in  the ordinary  and regular  course  of
    business and not otherwise prohibited under this Section 5.1;
 
        (b)   Neither  change   nor  amend   its  Certificate   or  Articles  of
    Incorporation or Bylaws;
 
        (c) Other than pursuant  to the exercise of  the Options outstanding  on
    the  date hereof, not  issue, sell or  grant options, warrants  or rights to
    purchase or subscribe  to, or enter  into any arrangement  or contract  with
    respect  to the  issuance or  sale of  any of  the capital  stock of  MMI or
 
                                      A-18
<PAGE>
    any of the  MMI Subsidiaries or  rights or obligations  convertible into  or
    exchangeable  for any shares of  the capital stock of MMI  or any of the MMI
    Subsidiaries and not alter the terms of any presently outstanding options or
    the MMI Stock  Option Plan or  make any changes  (by split-up,  combination,
    reorganization or otherwise) in the capital structure of MMI or any of MMI's
    Subsidiaries;
 
        (d)  Not declare,  pay or  set aside for  payment any  dividend or other
    distribution in respect of the capital  stock or other equity securities  of
    MMI  and not redeem, purchase or otherwise acquire any shares of the capital
    stock or other securities of MMI or any of the MMI Subsidiaries or rights or
    obligations convertible into or exchangeable  for any shares of the  capital
    stock  or  other  securities  of  MMI or  any  of  the  MMI  Subsidiaries or
    obligations convertible into such, or any options, warrants or other  rights
    to purchase or subscribe to any of the foregoing;
 
        (e)  Not  acquire or  enter into  any agreement  to acquire,  by merger,
    consolidation or purchase  of stock  or assets,  any business  or entity  or
    product line (other than the pending asset acquisitions described in the MMI
    Disclosure Schedule);
 
        (f)  Use  its  reasonable  efforts  to  preserve  intact  the  corporate
    existence,  goodwill  and   business  organization  of   MMI  and  the   MMI
    Subsidiaries,  to  keep  the  officers  and employees  of  MMI  and  the MMI
    Subsidiaries available to MMI and to  preserve the relationships of MMI  and
    the  MMI Subsidiaries with  suppliers, customers and  others having business
    relations with any of them, except  for such instances which would not  have
    an MMI Material Adverse Effect;
 
        (g)  Not  (i)  create, incur  or  assume any  long-term  debt (including
    obligations in  respect  of capital  leases  which individually  or  in  the
    aggregate  involve annual payments  in excess of $10,000)  or, except in the
    ordinary course of business under existing lines of credit, create, incur or
    assume any  short-term  debt for  borrowed  money, (ii)  assume,  guarantee,
    endorse  or  otherwise  become  liable  or  responsible  (whether  directly,
    contingently or otherwise)  for the  obligations of any  other person  other
    than  MMI Subsidiaries, (iii) make any loans or advances to any other person
    other than the MMI Subsidiaries, except  in the ordinary course of  business
    and  consistent with past  practice, or (iv)  make any capital contributions
    to, or investments in, any person other than the MMI Subsidiaries; provided,
    however, that MMI may  incur long-term debt under  its credit facility  with
    Chemical Bank, as may be amended upon terms not materially less favorable to
    MMI  in connection with the pending  asset acquisitions described in the MMI
    Disclosure Schedule up to an aggregate principal amount of $10.0 million; or
 
        (h) Not (i) enter into, modify or extend in any manner the terms of  any
    employment,  severance  or  similar  agreements  with  officers,  directors,
    employees  and  sales  representatives,  (ii)  grant  any  increase  in  the
    compensation  of officers or directors, whether  now or hereafter payable or
    (iii) grant any increase in the  compensation of any other employees  except
    for compensation increases in the ordinary course of business and consistent
    with past practice.
 
    In  connection with the continued  operation of the business  of MMI and the
MMI Subsidiaries between the date of this Agreement and the Effective Date,  MMI
shall  confer in good faith and on a regular and frequent basis with one or more
representatives of ICI designated  in writing to  report operational matters  of
materiality  and the general status of ongoing operations. In addition, MMI will
allow ICI  employees or  agent to  be  present at  MMI's business  locations  to
observe  the business and operations of MMI and the MMI Subsidiaries. MMI agrees
to participate in  the staff meetings  of ICI as  may be requested  by ICI.  MMI
acknowledges  that ICI does not and will not  waive any rights it may have under
this Agreement as a  result of such consultations  nor shall ICI be  responsible
for  any decisions made by MMI's officers  and directors with respect to matters
which are the subject of such consultation.
 
                                      A-19
<PAGE>
    5.2.  CONDUCT OF  BUSINESS BY ICI.   From the date  hereof to the  Effective
Date, ICI will, and will cause Merger Corp. and each of the ICI Subsidiaries to,
except  as required  in connection  with the  Merger and  the other transactions
contemplated by  this  Agreement and  except  as otherwise  disclosed  in  ICI's
Disclosure Schedule or consented to in writing by MMI:
 
        (a)  Carry  on its  businesses  in the  ordinary  and regular  course in
    substantially the same manner as heretofore conducted and not engage in  any
    new line of business;
 
        (b)  Except in  instances which would  not have an  ICI Material Adverse
    Effect,  neither  change   nor  amend   its  Certificate   or  Articles   of
    Incorporation or Bylaws;
 
        (c)  Other than pursuant  to the exercise of  ICI Options outstanding on
    the date hereof, not issue, sell or grant options (other than employee stock
    options granted under ICI's  existing stock option plans  as such plans  may
    hereafter  be amended), warrants  or rights to purchase  or subscribe to, or
    enter into any arrangement or contract with respect to the issuance or  sale
    of  more  than 500,000  shares  of the  capital stock  of  ICI or  rights or
    obligations convertible into or exchangeable  for any shares of the  capital
    stock of ICI;
 
        (d)  Not declare,  pay or  set aside for  payment any  dividend or other
    distribution in respect of the capital  stock or other equity securities  of
    ICI  and not redeem, purchase or otherwise acquire any shares of the capital
    stock or other securities of ICI  or rights or obligations convertible  into
    or  exchangeable for any shares of the  capital stock or other securities of
    ICI or obligations convertible into such, or any options, warrants or  other
    rights to purchase or subscribe to any of the foregoing;
 
        (e)  Use  its  reasonable  efforts  to  preserve  intact  the  corporate
    existence,  goodwill  and   business  organization  of   ICI  and  the   ICI
    Subsidiaries, to keep the executive officers of ICI and the ICI Subsidiaries
    available  to  ICI and  to preserve  the  relationships of  ICI and  the ICI
    Subsidiaries with suppliers, customers and others having business  relations
    with  any of  them, except for  such instances  which would not  have an ICI
    Material Adverse Effect;
 
        (f) Not (i) create, incur or assume any long-term debt or, except in the
    ordinary course of business under existing lines of credit, create, incur or
    assume any  short-term  debt for  borrowed  money, (ii)  assume,  guarantee,
    endorse  or  otherwise  become  liable  or  responsible  (whether  directly,
    contingently or otherwise)  for the  obligations of any  other person  other
    than  ICI  Subsidiaries  (except  in the  ordinary  course  of  business and
    consistent with past  practice), (iii)  make any  loans or  advances to  any
    other  person other than the ICI Subsidiaries, except in the ordinary course
    of business and  consistent with  past practice,  or (iv)  make any  capital
    contributions  to,  or  investments  in,  any  person  other  than  the  ICI
    Subsidiaries, except in each  case where such action  would not have an  ICI
    Material Adverse Effect; or
 
        (g)  Except in  instances which would  not have an  ICI Material Adverse
    Effect, not enter  into, modify or  extend in  any manner the  terms of  any
    employment,  severance or similar agreements with officers and directors nor
    grant any increase in the compensation of officers, directors or  employees,
    whether  now or hereafter payable (except  for compensation increases in the
    ordinary course of business and consistent with past practice).
 
    In connection with the  continued operation of the  business of ICI and  the
ICI  Subsidiaries between the date of this Agreement and the Effective Date, ICI
shall confer in good faith and on a regular and frequent basis with one or  more
representatives  of MMI designated  in writing to  report operational matters of
materiality and the general status of ongoing operations. ICI acknowledges  that
MMI does not and will not waive any rights it may have under this Agreement as a
result of such consultations nor shall MMI be responsible for any decisions made
by ICI's officers and directors with respect to matters which are the subject of
such consultation.
 
    5.3.   NOTICE OF ANY  MATERIAL CHANGE.  Each of  MMI and ICI shall, promptly
after the first  notice or  occurrence thereof but  not later  than the  Closing
Date, advise the other in writing of any event or
 
                                      A-20
<PAGE>
the   existence  of  any  state  of  facts  that  would  (i)  make  any  of  its
representations and warranties in this Agreement untrue in any material respect,
or (ii) otherwise  constitute an  MMI Material  Adverse Effect  or ICI  Material
Adverse Effect, as the case may be.
 
    5.4.  INSPECTION AND ACCESS TO INFORMATION.
 
        (a)  Between the  date of  this Agreement  and the  Effective Date, each
    party hereto will, and will cause each of its subsidiaries to, provide  each
    other   party   and   its   accountants,   counsel   and   other  authorized
    representatives full  access, during  reasonable  business hours  and  under
    reasonable  circumstances  to  any  and  all  of  its  premises, properties,
    contracts, commitments, books, records and other information (including  tax
    returns  filed and  those in  preparation) and  will cause  their respective
    officers to furnish to  the other party  and its authorized  representatives
    any  and all financial,  technical and operating  data and other information
    pertaining to its  business, as  each other party  shall from  time to  time
    request.
 
        (b) Those certain letter agreements dated February 22, 1996 and March 8,
    1996  relative to,  without limitation,  the protection  of the confidential
    information of MMI  (the "MMI  CA") and  ICI (the  "ICI CA"),  respectively,
    shall  remain in full  force and effect  except as modified  by the terms of
    this Agreement. In the event of  any inconsistency between the terms of  the
    MMI  CA and the  ICI CA, on the  one hand, and this  Agreement, on the other
    hand, this Agreement shall control.
 
    5.5.  ANTITRUST LAWS.   As soon  as practicable, each of  ICI and MMI  shall
make  any and all filings which are required  under the HSR Act. Each of ICI and
MMI will assist the other as may be reasonably requested in connection with  the
preparation of such filings.
 
    5.6.  POOLING.  From and after the date hereof and until the Effective Date,
neither ICI nor MMI nor any of their respective subsidiaries or other affiliates
shall  (i) knowingly take any action, or knowingly fail to take any action, that
would jeopardize the  treatment of  the Merger as  a "pooling  of interest"  for
accounting purposes or (ii) knowingly take any action, or knowingly fail to take
any   action,  that   would  jeopardize  qualification   of  the   Merger  as  a
reorganization within the meaning of Section 368(a)(2)(E) of the Code.
 
    5.7.  REGISTRATION STATEMENT AND PROXY STATEMENT.
 
        (a) ICI shall promptly prepare and file a registration statement on Form
    S-4 (which registration statement, in the  form it is declared effective  by
    the  SEC, together with  any and all amendments  and supplements thereto and
    all information incorporated by reference therein, is referred to herein  as
    the  "Registration Statement") under  and pursuant to  the provisions of the
    Securities Act for the purpose of registering ICI Common Stock to be  issued
    in the Merger. ICI will use its reasonable efforts to receive and respond to
    the  comments of  the SEC, and  each of ICI  and MMI shall  promptly mail to
    their respective stockholders  the proxy  statement in  its definitive  form
    contained  in the Registration Statement (the "Proxy Statement"). Such Proxy
    Statement shall  also  serve  as  the  prospectus  to  be  included  in  the
    Registration Statement. In addition, MMI shall cause its auditors to prepare
    and  deliver such  reports and  consents as  ICI may  reasonably require for
    inclusion in the Registration Statement and such other filings as ICI  deems
    necessary,  including,  without limitation,  such  auditors' consent  to the
    incorporation by reference of such auditors' reports into ICI's registration
    statements on Form S-8.
 
        (b) Each of ICI and MMI agrees to provide as promptly as practicable  to
    the  other such information concerning its business and financial statements
    and affairs  as, in  the reasonable  judgment  of the  other party,  may  be
    required  or appropriate for inclusion in the Registration Statement and the
    Proxy Statement or in  any amendments or supplements  thereto, and to  cause
    its  counsel and auditors to cooperate with the other's counsel and auditors
    in the preparation of the Registration Statement and the Proxy Statement.
 
        (c) At the time the Registration Statement becomes effective and at  the
    Effective   Date,  as  such  Registration   Statement  is  then  amended  or
    supplemented, and at  the time the  Proxy Statement is  mailed to ICI's  and
    MMI's    respective   stockholders,   such    Registration   Statement   and
 
                                      A-21
<PAGE>
    Proxy Statement will  (i) not  contain any  untrue statement  of a  material
    fact,  or omit to state  any material fact required  to be stated therein as
    necessary, in  order  to  make  the statements  therein,  in  light  of  the
    circumstances  under which they were made, not misleading and (ii) comply in
    all material respects with the provisions of the Securities Act and Exchange
    Act, as  applicable, and  the rules  and regulations  thereunder;  provided,
    however,  no representation is made by ICI or MMI with respect to statements
    made in the Registration Statement and Proxy Statement based on  information
    supplied  by the  other party  expressly for  inclusion or  incorporation by
    reference in the  Proxy Statement or  Registration Statement or  information
    omitted with respect to the other party.
 
    5.8.  STOCKHOLDERS' MEETING.
 
        (a)  Each of MMI and ICI shall call  a meeting of its stockholders to be
    held as soon as practicable after the date hereof for the purpose of  voting
    upon matters relating to this Agreement.
 
        (b)  MMI  will  use its  reasonable  efforts to  hold  its stockholders'
    meeting as promptly as practicable as may  be directed by ICI and to  obtain
    stockholder  approval and will, through its Board of Directors, recommend to
    its  stockholders  approval  of  the  Merger  and  this  Agreement  at   the
    stockholders'  meeting;  provided,  however,  that  such  recommendation  is
    subject to any  action taken  by, or  upon the  authority of,  the Board  of
    Directors  of  MMI in  the exercise  of its  good faith  judgment as  to its
    fiduciary duties to the stockholders of MMI exercised in accordance with the
    provisions of Section 5.13.
 
        (c) ICI  will  use its  reasonable  efforts to  hold  its  stockholders'
    meeting  as promptly as  practicable for the purpose  of acting upon matters
    relating to  this  Agreement  and  will, through  its  Board  of  Directors,
    recommend  to its stockholders approval of  the issuance of ICI Common Stock
    as set forth in this Agreement; provided, however, that such  recommendation
    is  subject to any action  taken by, or upon the  authority of, the Board of
    Directors of  ICI in  the exercise  of its  good faith  judgment as  to  its
    fiduciary duties to the stockholders of ICI.
 
    5.9.  LISTING APPLICATION.  ICI will file a listing application with the NMS
to  approve for listing, subject  to official notice of  issuance, the shares of
ICI Common  Stock to  be issued  in the  Merger. ICI  shall use  its  reasonable
efforts to cause the shares of ICI Common Stock to be issued in the Merger to be
approved  for listing on the NMS, subject  to official notice of issuance, prior
to the Effective Date.
 
    5.10.  AFFILIATES.  At  least 30 days prior to  the Closing Date, MMI  shall
deliver  to ICI a letter identifying all persons who are, at the time the Merger
is submitted to  a vote  to the  stockholders of  MMI, "affiliates"  of MMI  for
purposes  of Rule 145 under the Securities Act. Each person who is identified as
an "affiliate" in such letter will deliver to ICI on or before 30 days prior  to
the  Closing Date a written statement, in form satisfactory to ICI and MMI, that
such person will not offer to sell, transfer or otherwise dispose of any of  the
shares of MMI Common Stock or ICI Common Stock issued to such person, except (i)
in accordance with the applicable provisions of the Securities Act and the rules
and  regulations  thereunder  and  (ii) until  such  time  as  financial results
covering at  least 30  days of  combined operations  of ICI  and MMI  have  been
published  (the "Publication Date"). ICI hereby covenants  to file a Form 8-K or
10-Q  (as  applicable)  satisfying  such  publication  requirement  as  soon  as
practicable after the completion of any month which contains at least 30 days of
combined  operations. ICI shall be entitled to place legends on any certificates
of ICI  Common Stock  issued to  such affiliates  to restrict  transfer of  such
shares as set forth above.
 
    5.11.   REASONABLE EFFORTS; FURTHER ASSURANCES; COOPERATION.  Subject to the
other provisions of  this Agreement,  the parties  hereto shall  each use  their
reasonable  efforts to perform their obligations herein and to take, or cause to
be taken or do, or cause to  be done, all things necessary, proper or  advisable
under  applicable  law  to  obtain  all  regulatory  approvals  and  satisfy all
conditions to the obligations of the  parties under this Agreement and to  cause
the  Merger and  the other  transactions contemplated  herein to  be carried out
promptly in accordance with the terms hereof and shall
 
                                      A-22
<PAGE>
cooperate fully  with  each  other and  their  respective  officers,  directors,
employees,  agents, counsel, accountants and  other designees in connection with
any steps required to be taken as  a part of their respective obligations  under
this Agreement, including without limitation:
 
        (a)  MMI  and  ICI  shall promptly  make  their  respective  filings and
    submissions and shall take,  or cause to  be taken, all  actions and do,  or
    cause to be done, all things necessary, proper or advisable under applicable
    laws and regulations to comply with the provisions of the HSR Act.
 
        (b)  Each party shall give prompt written notice to the other of (i) the
    occurrence, or failure to  occur, of any event  which occurrence or  failure
    would  be likely to cause  any representation or warranty  of MMI or ICI, as
    the case may be, contained in this  Agreement to be untrue or inaccurate  in
    any  material respect at any time from the date hereof to the Effective Date
    or that will or may result in  the failure to satisfy any of the  conditions
    specified  in Articles 6  and 7 and (ii)  any failure of MMI  or ICI, as the
    case may be, to comply with or satisfy any covenant, condition or  agreement
    to be complied with or satisfied by it hereunder.
 
        (c)  MMI  has  obtained  (and  will  promptly  deliver  copies  to  ICI)
    agreements from Messrs. Vought, Lee and  Berry and Micro Partners, L.P.  and
    Kitty  Hawk Capital  Limited Partnership,  II (i)  not to  perfect appraisal
    rights with respect  to the Merger  (to the extent  applicable) and (ii)  to
    vote  all shares of  MMI Common Stock  beneficially owned by  such person in
    favor of the  approval of this  Agreement and the  Merger (which  agreements
    shall  contain a  proxy in favor  of ICI with  respect to the  shares of MMI
    Common Stock beneficially owned by such persons).
 
    5.12.  PUBLIC ANNOUNCEMENTS.   The timing and  content of all  announcements
regarding any aspect of this Agreement or the Merger to the financial community,
government  agencies, employees or  the general public  shall be mutually agreed
upon in  advance  (unless  ICI or  MMI  is  advised by  counsel  that  any  such
announcement or other disclosure not mutually agreed upon in advance is required
to be made by law or applicable stock exchange rule and then only after making a
reasonable  attempt to comply  with the provisions of  this Section). Subject to
the preceding sentence,  the parties acknowledge  their respective intention  to
make  a public announcement  of the transactions  contemplated by this Agreement
promptly following the execution and delivery of this Agreement.
 
    5.13.  NO SOLICITATIONS.  From the  date hereof until the Effective Date  or
until  this Agreement is terminated or  abandoned as provided in this Agreement,
neither MMI nor  any of the  MMI Subsidiaries shall  directly or indirectly  (i)
solicit,  initiate or encourage discussion with  or (ii) enter into negotiations
or agreements with, or  furnish any information that  is not publicly  available
to,  any corporation, partnership,  person or other entity  or group (other than
ICI, an affiliate of  ICI or their authorized  representatives pursuant to  this
Agreement)  concerning any  proposal for a  merger, sale  of substantial assets,
sale of shares of stock or securities or other takeover or business  combination
transaction  (the  "Acquisition  Proposal")  involving MMI  or  any  of  the MMI
Subsidiaries, and  MMI  will  exercise  its  reasonable  efforts  to  cause  its
officers,  directors, advisors and  its financial and  legal representatives and
consultants not to take any action contrary to the foregoing provisions of  this
sentence; provided, however, that MMI, its officers, directors, advisors and its
financial and legal representatives and consultants shall not be prohibited from
taking any action described in (ii) above to the extent such action is taken by,
or  upon the authority of, the Board of Directors of MMI in the exercise of good
faith judgment as to its fiduciary duties to the stockholders of MMI based  upon
the  advice of independent legal counsel  in recognition of, without limitation,
the long-term corporate objectives of MMI  sought to be achieved by the  Merger.
MMI  will notify ICI promptly in writing if MMI becomes aware that any inquiries
or proposals  are  received  by,  any  information  is  requested  from  or  any
negotiations or discussions are sought to be initiated with, MMI with respect to
an  Acquisition  Proposal, and  MMI shall  promptly deliver  to ICI  any written
inquiries or proposals received by MMI relating to an Acquisition Proposal. Each
time, if any, that the Board of  Directors of MMI determines that it must  enter
into  negotiations  with,  or  furnish  any  information  that  is  not publicly
available to,  any corporation,  partnership, person  or other  entity or  group
(other  than  ICI,  an affiliate  of  ICI or  their  authorized representatives)
concerning any Acquisition  Proposal, MMI will  give ICI prompt  notice of  such
determination  (which shall include  a copy of  the non-public information which
MMI has
 
                                      A-23
<PAGE>
delivered to such  other person or  entity) and shall  require the recipient  of
such  information  to execute  and deliver  to  MMI a  confidentiality agreement
substantially identical to the MMI CA as a condition precedent to furnishing any
such information (failing which, without limitation  of any other right of  ICI,
the fifth paragraph of the MMI CA shall no longer be of any force or effect). In
the event of the execution of any Acquisition Proposal by MMI, ICI may terminate
this  Agreement in the exercise of its discretion. The second preceding sentence
of this Section shall survive any termination of this Agreement.
 
                                   ARTICLE 6.
                   CONDITIONS PRECEDENT TO OBLIGATIONS OF MMI
 
    Except as may be  waived by MMI,  the obligations of  MMI to consummate  the
transactions contemplated by this Agreement shall be subject to the satisfaction
on or before the Closing Date of each of the following conditions:
 
    6.1.   COMPLIANCE.  ICI shall have, or shall have caused to be, satisfied or
complied with and performed in all  material respects all terms, covenants,  and
conditions  of this  Agreement to  be complied  with or  performed by  ICI on or
before the Closing Date.
 
    6.2.   REPRESENTATIONS  AND WARRANTIES.    All of  the  representations  and
warranties  made by  ICI in  this Agreement  and in  all certificates  and other
documents delivered  by ICI  to MMI  pursuant hereto  shall have  been true  and
correct  in all material respects  as of the date hereof,  and shall be true and
correct in all material  respects at the  Closing Date with  the same force  and
effect  as if such representations and warranties had been made at and as of the
Closing Date, except for changes permitted or contemplated by this Agreement and
except  that   if  information   which  would   constitute  a   breach  of   the
representations and warranties of ICI made in this Agreement is disclosed in the
Proxy   Statement  on  the  date  such   Proxy  Statement  is  mailed  to  MMI's
stockholders, then MMI  shall be  deemed to have  waived this  condition to  the
performance of its obligations hereunder.
 
    6.3.   MATERIAL  ADVERSE CHANGES.   Subsequent  to December  31, 1995, there
shall not have occurred any ICI Material  Adverse Effect except as set forth  in
the ICI Disclosure Schedule.
 
    6.4.   NMS LISTING.   ICI Common  Stock issuable pursuant  to the Merger and
pursuant to the exercise of the Options after the Effective Date shall have been
authorized for listing on the NMS.
 
    6.5.  CERTIFICATES.  MMI shall have received a certificate or  certificates,
executed on behalf of ICI by an executive officer of ICI, to the effect that the
conditions contained in Sections 6.2 and 6.3 hereof have been satisfied.
 
    6.6.   STOCKHOLDER  APPROVAL.  This  Agreement shall have  been approved and
adopted by the  affirmative vote  of the  holders of a  majority of  all of  the
outstanding shares of MMI Common Stock.
 
    6.7.   EFFECTIVENESS OF REGISTRATION  STATEMENT.  The Registration Statement
shall have become effective and  no stop order shall been  issued by the SEC  or
any   other  governmental   authority  suspending   the  effectiveness   of  the
Registration Statement  or  preventing or  suspending  the use  thereof  or  any
related prospectus.
 
    6.8.   CONSENTS; LITIGATION.   Other than  the filing of  the Certificate of
Merger as  described  in Article  1,  all authorizations,  consents,  orders  or
approvals of, or declarations or filings with, or expirations or terminations of
waiting  periods (including the waiting period under the HSR Act) imposed by any
governmental entity,  and  all required  third-party  consents, the  failure  to
obtain  which would have a material adverse  effect on ICI and its subsidiaries,
including the  Surviving Corporation  and its  subsidiaries, taken  as a  whole,
shall  have been filed, occurred  or been obtained. ICI  shall have received all
state securities or Blue Sky permits and other authorizations necessary to issue
ICI Common Stock pursuant to the Merger  and the other terms of this  Agreement.
In addition, no action, suit or proceeding shall have been instituted before any
court  or other governmental entity to  restrain, modify, enjoin or prohibit the
carrying out of the transactions contemplated hereby.
 
                                      A-24
<PAGE>
    6.9.  TAX OPINION.   MMI shall have received  a favorable opinion of  Arnall
Golden  & Gregory  based upon  certain factual  representations of  MMI, ICI and
Merger  Corp.  reasonably  requested  by  such  counsel,  and  containing   such
qualifications  as such counsel reasonably deems appropriate relative to factual
matters not otherwise  verified to  such counsel's satisfaction,  to the  effect
that the Merger will constitute a reorganization for federal income tax purposes
within the meaning of Section 368(a) of the Code and that accordingly:
 
        (a)  No gain or loss will be  recognized by the shareholders of MMI upon
    the conversion of their shares of MMI Common Stock into shares of ICI Common
    Stock pursuant to  the terms of  the Merger  (except to the  extent cash  is
    received in lieu of fractional shares);
 
        (b)  The  tax basis  of the  shares of  ICI Common  Stock received  by a
    shareholder of MMI  on the conversion  of MMI Common  Stock pursuant to  the
    Merger  will be the same as the basis  of the shares of the MMI Common Stock
    converted (less  any  portion of  such  basis allocable  to  any  fractional
    interest in any share of ICI Common Stock); and
 
        (c)  The holding period of the ICI Common Stock into which shares of MMI
    Common Stock are converted will include  the period that such shares of  MMI
    Common  Stock were held by  the holder, provided such  shares were held as a
    capital asset by such holder.
 
                                   ARTICLE 7.
          CONDITIONS PRECEDENT TO OBLIGATIONS OF ICI AND MERGER CORP.
 
    Except as may be waived by ICI and Merger Corp., the obligations of ICI  and
Merger Corp. to consummate the transactions contemplated by this Agreement shall
be  subject to the satisfaction,  on or before the Closing  Date, of each of the
following conditions:
 
    7.1.  COMPLIANCE.  MMI shall have, or shall have caused to be, satisfied  or
complied  with and performed in all  material respects all terms, covenants, and
conditions of this Agreement to be complied with or performed by it on or before
the Closing Date.
 
    7.2.   REPRESENTATIONS  AND WARRANTIES.    All of  the  representations  and
warranties  made by  MMI in  this Agreement  and in  all certificates  and other
documents delivered by MMI pursuant hereto, shall have been true and correct  in
all  material respects as of  the date hereof, and shall  be true and correct in
all material respects at the Closing Date  with the same force and effect as  if
such representations and warranties had been made at and as of the Closing Date,
except  for changes permitted or contemplated  by this Agreement and except that
if information  which  would constitute  a  breach of  the  representations  and
warranties  of MMI made in this Agreement is disclosed in the Proxy Statement on
the date such Proxy Statement is mailed to MMI's stockholders, then ICI shall be
deemed to  have waived  this condition  to the  performance of  its  obligations
hereunder.
 
    7.3.   MATERIAL ADVERSE CHANGES.   Since February 29,  1996, there shall not
have occurred any MMI Material Adverse Effect.
 
    7.4.  CERTIFICATES.  ICI shall have received a certificate or  certificates,
executed on behalf of MMI by an executive officer of MMI, to the effect that the
conditions in Sections 7.2 and 7.3 hereof have been satisfied.
 
    7.5.   DISSENTERS' RIGHTS.  To the  extent appraisal rights are available to
MMI's stockholders  in connection  with the  Merger,  no more  than 10%  of  the
outstanding  shares of MMI Common Stock  shall (a) qualify as Dissenting Shares,
(b) be subject to payment  in lieu of fractional  shares as provided in  Section
2.2 hereof or (c) be treasury shares of MMI.
 
    7.6.   CONSENTS; LITIGATION.   Other than  the filing of  the Certificate of
Merger as  described  in Article  1,  all authorizations,  consents,  orders  or
approvals of, or declarations or filings with, or expirations or terminations of
waiting periods (including the waiting period under the HSR Act) imposed by, any
governmental  entity,  and all  required  third-party consents,  the  failure to
obtain which
 
                                      A-25
<PAGE>
would have a material adverse effect on ICI and its subsidiaries, including  the
Surviving  Corporation and its  subsidiaries, taken as a  whole, shall have been
filed, occurred or been obtained. ICI  shall have received all state  securities
or Blue Sky permits and other authorizations necessary to issue ICI Common Stock
pursuant  to the Merger and  the other terms of  this Agreement. In addition, no
action, suit or proceeding shall have been instituted before any court or  other
governmental  entity to restrain, modify, enjoin or prohibit the carrying out of
the transactions contemplated hereby.
 
    7.7.   COMFORT LETTER.   ICI  shall  have received  from KPMG  Peat  Marwick
L.L.P.,  certified public accountants  for MMI, (a)  "comfort" letters dated the
date of the Proxy  Statement, the effective date  of the Registration  Statement
and  the Closing  Date (or  such other date  reasonably acceptable  to ICI) with
respect to certain financial statements and other financial information included
in the Registration Statement in customary form, (b) the consents referred to in
Section 5.7(a) in respect  of any filing previously  or concurrently being  made
with  the SEC, and (c) a  letter addressed to ICI and  Deloitte & Touche LLP, in
form and  substance reasonably  satisfactory  to ICI,  to  the effect  that  MMI
qualifies  as  an entity  such that  the Merger  will qualify  as a  "pooling of
interests" transaction under generally accepted accounting principles.
 
    7.8.  POOLING LETTERS.   ICI shall  have received a  letter from Deloitte  &
Touche  LLP,  certified  public accountants  for  ICI, dated  the  Closing Date,
addressed to ICI, in form and substance reasonably satisfactory to ICI,  stating
that  the  Merger will  qualify as  a "pooling  of interests"  transaction under
generally accepted accounting principles.
 
    7.9.   STOCKHOLDER  APPROVAL.    ICI shall  have  obtained  any  shareholder
approval  required for  listing ICI Common  Stock on  NMS as a  condition to the
consummation of the transactions set forth in this Agreement.
 
                                   ARTICLE 8.
                         INDEMNIFICATION AND INSURANCE
 
    8.1  INDEMNIFICATION.  In the  event of any claim, action, suit,  proceeding
or  investigation, whether civil, criminal or administrative, including, without
limitation, any such claim, action,  suit, proceeding or investigation in  which
any  of the present or  former officers or directors  (the "Managers") of MMI or
any of the MMI Subsidiaries is, or is  threatened to be, made a party by  reason
of  the  fact that  he or  she served  as a  Manager of  MMI or  any of  the MMI
Subsidiaries, or is  or was  serving at the  request of  MMI or any  of the  MMI
Subsidiaries  as a director, officer, employee  or agent of another corporation,
partnership, joint venture, trust or  other enterprise, whether before or  after
the  Effective Date, MMI shall  indemnify and hold harmless,  and from and after
the Effective Date each of the Surviving Corporation and ICI shall indemnify and
hold harmless, as and to the full extent permitted by applicable law  (including
by  advancing expenses promptly as statements  therefor are received), each such
Manager against  any  losses,  claims,  damages,  liabilities,  costs,  expenses
(including  attorneys' fees), judgments, fines and amounts paid in settlement in
connection with any such claim,  action, suit, proceeding or investigation,  and
in  the  event  of any  such  claim,  action, suit  proceeding  or investigation
(whether arising before or after the Effective  Date), (i) if MMI (prior to  the
Effective  Date) or ICI or the  Surviving Corporation (after the Effective Date)
have not promptly assumed  the defense of such  matter, the Managers may  retain
counsel  satisfactory to  them, and  MMI, or  the Surviving  Corporation and ICI
after the Effective  Date, shall pay  all reasonable fees  and expenses of  such
counsel for the Managers promptly, as statements therefor are received, and (ii)
MMI,  or the Surviving  Corporation and ICI  after the Effective  Date, will use
their respective reasonable  efforts to assist  in the vigorous  defense of  any
such  matter; provided  that neither  MMI nor  the Surviving  Corporation or ICI
shall be liable for any settlement  effected without its prior written  consent;
provided further that the Surviving Corporation and ICI shall have no obligation
under  the foregoing provisions of this Section 8.1 to any Manager when and if a
court  of   competent  jurisdiction   shall  ultimately   determine,  and   such
determination   shall   have   become  final   and   non-appealable,   (x)  that
indemnification of such Manager in the manner contemplated hereby is  prohibited
by  applicable law, or  (y) that MMI  has breached a  representation or warranty
hereunder with respect to the same
 
                                      A-26
<PAGE>
matters for  which indemnification  is being  sought by  such Manager  and  such
Manager  fails to prove that such Manager had no actual knowledge of such breach
at the  Effective  Date; and  provided  further  that such  Manager  shall  have
satisfied  any and all  applicable conditions precedent  to such indemnification
under applicable  law. Upon  the finality  of any  such determination  that  the
Surviving  Corporation or ICI is not liable for any such indemnification claims,
the Manager  will reimburse  ICI and  the Surviving  Corporation for  any  fees,
expenses  and costs incurred  by ICI or the  Surviving Corporation in connection
with the defense of  such claims. Any Manager  wishing to claim  indemnification
under  this  Section  8.1,  upon  learning  of  any  such  claim,  action, suit,
proceeding or investigation, shall  notify MMI and  ICI, thereof (provided  that
the  failure to  give such  notice shall  not affect  any obligations hereunder,
except to the  extent that  the indemnifying  party is  actually and  materially
prejudiced thereby). ICI further covenants not to amend or repeal any provisions
of  the Certificate of Incorporation or Bylaws  of MMI in any manner which would
adversely affect the indemnification or exculpatory provisions contained herein.
The provisions of this Section  8.1 are intended to be  for the benefit of,  and
shall  be  enforceable by,  each  indemnified party  and  his or  her  heirs and
representatives, and shall survive the Closing  for a period expiring six  years
from the Effective Date.
 
    8.2.   DIRECTORS' AND OFFICERS'  INSURANCE.  For a  period of two years from
the Effective Date, the  Surviving Corporation shall  either, in its  discretion
(x)  maintain  in  effect  MMI's  current  directors'  and  officers'  liability
insurance covering those Managers who are currently covered on the date of  this
Agreement  by MMI's directors' and officers'  liability insurance policy (a copy
of which  has been  heretofore delivered  to ICI);  PROVIDED HOWEVER,  that  the
Surviving  Corporation may  substitute for such  MMI policies,  policies with at
least the  same coverage  containing  terms and  conditions  which are  no  less
advantageous to the Managers and provided that said substitution does not result
in any gaps or lapses in coverage with respect to matters occurring prior to the
Effective  Date  or (y)  to the  extent applicable,  cause ICI's  directors' and
officers' liability insurance, if any, then in effect to cover those persons who
are covered on  the date  of this Agreement  by MMI's  directors' and  officers'
liability  insurance  policy  with respect  to  those matters  covered  by MMI's
directors' and officers' liability insurance policy. In no event, however, shall
the Surviving Corporation or  ICI be required  by this Section  8.2 to expend  a
premium for such insurance in an amount equal to double the rate paid by MMI for
the policy period immediately preceding the date of execution of this Agreement.
The  provisions of this Section  8.2 are intended to be  for the benefit of, and
shall be enforceable by, each Manager and his or her heirs and  representatives.
Notwithstanding  the foregoing, ICI shall have  no liability or obligation under
this Section 8.2 to  the extent the  policy referred to in  this Section is  not
reasonably available on the terms set forth in this Section.
 
                                   ARTICLE 9.
                                 MISCELLANEOUS
 
    9.1.   TERMINATION.  In addition to the provisions regarding termination set
forth elsewhere herein, this Agreement and the transactions contemplated  hereby
may be terminated at any time on or before the Closing Date:
 
        (a) by mutual consent of MMI and ICI;
 
        (b)  by ICI if there has been  a material misrepresentation or breach of
    warranty in the representations and warranties of MMI set forth herein or  a
    failure  to perform in  any material respect  a covenant on  the part of MMI
    with respect to its representations,  warranties and covenants set forth  in
    this  Agreement, except for any such misrepresentation, breach or failure to
    perform which was disclosed in the Proxy Statement on the date it is  mailed
    to MMI's stockholders to the extent that ICI has expressly agreed in writing
    to such specific disclosure;
 
        (c)  by MMI if there has been  a material misrepresentation or breach of
    warranty in the representations and warranties of ICI set forth herein or  a
    failure  to perform in  any material respect  a covenant on  the part of ICI
    with respect to its representations,  warranties and covenants set forth  in
    this  Agreement, except for any such misrepresentation, breach or failure to
 
                                      A-27
<PAGE>
    perform which was disclosed in the Proxy Statement on the date it is  mailed
    to MMI's stockholders to the extent that MMI has expressly agreed in writing
    to  such specific disclosure (and, in no event whatsoever shall MMI have any
    right or remedy  in respect of  any breach  or violation by  ICI of  Section
    5.2(c) hereof other than to exercise any termination right of MMI under this
    Section 9.1(c));
 
        (d)  by  either ICI  or  MMI if  the  transactions contemplated  by this
    Agreement have  not been  consummated  by September  30, 1996,  unless  such
    failure  of consummation is due  to the failure of  the terminating party to
    perform or observe the  covenants, agreements, and  conditions hereof to  be
    performed  or observed by it  at or before the  Closing Date (except for any
    breach by ICI of Section 5.2(c) hereof);
 
        (e) by either MMI or ICI if the transactions contemplated hereby violate
    any  nonappealable  final  order,  decree  or  judgment  of  any  court   or
    governmental body or agency having competent jurisdiction;
 
        (f)  by MMI if, in the exercise of  the good faith judgment of its Board
    of Directors as  to its fiduciary  duties to its  stockholders exercised  in
    accordance with the provisions of Section 5.13, such termination is required
    by reason of an Acquisition Proposal; or
 
        (g)  by  ICI  if the  MMI  Board  of Directors  withdraws  or materially
    modifies or changes its recommendation to the stockholders of MMI to approve
    this Agreement and the Merger.
 
    9.2.  EXPENSES.
 
        (a) Except as provided in (b) below, if the transactions contemplated by
    this Agreement are  not consummated,  each party  hereto shall  pay its  own
    expenses  incurred in  connection with  this Agreement  and the transactions
    contemplated hereby.
 
        (b) If, (i)  this Agreement  is terminated  by MMI  pursuant to  Section
    9.1(f)  hereof, (ii) this Agreement is terminated by ICI pursuant to Section
    9.1(g) or  (iii)  on  or  before  September 30,  1996,  MMI  enters  into  a
    definitive  agreement  with  respect  to an  Acquisition  Proposal  with any
    corporation, partnership, person or other entity or group (other than ICI or
    any  affiliate  of  ICI),  and  such  transaction  (including  any   revised
    transaction  based upon the Acquisition  Proposal) is thereafter consummated
    (whether before or after September 30, 1996), then MMI shall pay ICI a  cash
    fee  equal to the  sum of $2.5 Million,  which such fee  shall be payable in
    same day funds to  an account specified by  ICI. This Section shall  survive
    any termination of this Agreement.
 
    9.3.   ENTIRE  AGREEMENT.  This  Agreement, the MMI  CA, the ICI  CA and the
exhibits hereto contain the complete agreement among the parties with respect to
the transactions  contemplated hereby  and supersede  all prior  agreements  and
understandings  among the parties with respect to such transactions. Section and
other headings  are  for  reference  purposes only  and  shall  not  affect  the
interpretation  or construction of  this Agreement. The  parties hereto have not
made any  representation or  warranty  except as  expressly  set forth  in  this
Agreement  or  in any  certificate or  schedule  delivered pursuant  hereto. The
obligations of any party under any agreement executed pursuant to this Agreement
shall not be affected by this section.
 
    9.4.  NON-SURVIVAL  OF REPRESENTATIONS  AND WARRANTIES AND  COVENANTS.   The
representations and warranties of each party contained herein or in any exhibit,
certificate,  document or instrument  delivered pursuant to  this Agreement, and
the covenants and agreements of the parties (other than those contained in  2.5,
8.1 and 8.2) shall not survive the Closing.
 
    9.5.    COUNTERPARTS.   This  Agreement may  be  executed in  any  number of
counterparts, each of which  when so executed and  delivered shall be deemed  an
original, and such counterparts together shall constitute only one original.
 
                                      A-28
<PAGE>
    9.6.   NOTICES.  All notices, demands, requests or other communications that
may be or are required to  be given, served, or sent  by any party to any  other
party  pursuant to  this Agreement shall  be in  writing and shall  be mailed by
first-class, registered  or certified  mail, return  receipt requested,  postage
prepaid, or transmitted by hand delivery or facsimile transmission, addressed as
follows:
 
        (i) If to ICI:
 
            4320 International Boulevard, N.W.
           Norcross, Georgia 30093
           Attention: Robert L. Taylor, President and Chief Executive Officer
           Facsimile: (770) 381-7581
           with a copy (which shall not constitute notice) to:
 
            Arnall Golden & Gregory
           2800 One Atlantic Center
           1201 W. Peachtree Street
           Atlanta, Georgia 30309
           Attention: Stephen D. Fox
           Facsimile: (404) 873-8529
 
        (ii) If to MMI:
 
             Post Office Box 2487
           Columbus, Mississippi 39704
           Attention: Kimber L. Vought, President and Chief Executive Officer
           Facsimile: (601) 329-9176
           with a copy (which shall not constitute notice) to:
 
             Crouch & Hallett, L.L.P.
           717 North Harwood Street
           Suite 1400
           Dallas, Texas 75201
           Attention: Bruce H. Hallett
           Facsimile: (214) 953-0576
 
Each party may designate by notice in writing a new address to which any notice,
demand,  request or  communication may thereafter  be so given,  served or sent.
Each notice,  demand, request  or  communication that  is mailed,  delivered  or
transmitted  in the manner  described above shall  be deemed sufficiently given,
served, sent, and received for all purposes  at such time as it is delivered  to
the  addressee (with the return receipt,  the delivery receipt, the confirmation
of facsimile  delivery or  the affidavit  of messenger  being deemed  conclusive
evidence  of  such delivery)  or  at such  time as  delivery  is refused  by the
addressee upon presentation.
 
    9.7.  SUCCESSORS; ASSIGNMENTS.  This Agreement and the rights, interests and
obligations hereunder shall be  binding upon and shall  inure to the benefit  of
the  parties hereto  and their respective  successors and  assigns. Neither this
Agreement nor any  of the rights,  interests or obligations  hereunder shall  be
assigned, by operation of law or otherwise, by any of the parties hereto without
the prior written consent of the other.
 
    9.8.   GOVERNING  LAW.   This Agreement shall  be construed  and enforced in
accordance with the  laws of the  State of  Delaware (except the  choice of  law
rules thereof).
 
    9.9.   AMENDMENT, WAIVER AND OTHER ACTION.   To the extent permitted by law,
this Agreement may be amended by a subsequent writing signed by each of ICI  and
MMI  upon  the approval  of the  Boards of  Directors  of each  of ICI  and MMI;
provided, however, that the provisions hereof relating to the manner or basis in
which shares of MMI Common  Stock will be exchanged  for ICI Common Stock  shall
not  be  amended after  the  stockholder meeting  of MMI  or  ICI to  adopt this
Agreement without
 
                                      A-29
<PAGE>
the requisite approval of  the holders of issued  and outstanding shares of  MMI
Common  Stock or ICI Common Stock, as the case may be, respectively. Prior to or
at the Effective Date,  each of ICI and  MMI shall have the  right to waive  any
default  in the performance of any term of this Agreement by the other, to waive
or extend the time for the compliance or fulfillment by the other of any and all
of the other's obligations under this Agreement  and to waive any or all of  the
conditions  precedent  to  its  obligations  under  this  Agreement,  except any
condition which, if not satisfied,  will result in the  violation of any law  or
applicable governmental regulation.
 
    9.10.   SEVERABILITY.   If  any provision  of this  Agreement is  held to be
illegal, invalid, or unenforceable, such provision shall be fully severable, and
this Agreement shall be  construed and enforced as  if such illegal, invalid  or
unenforceable  provision  were never  a  part hereof;  the  remaining provisions
hereof shall remain in full  force and effect and shall  not be affected by  the
illegal,  invalid or unenforceable provision or by its severance; and in lieu of
such  illegal,  invalid  or  unenforceable  provision,  there  shall  be   added
automatically  as part of this Agreement, a provision as similar in its terms to
such illegal,  invalid or  unenforceable provision  as may  be possible  and  be
legal, valid and enforceable.
 
    9.11.   NO THIRD PARTY BENEFICIARIES.  Article 8 is intended for the benefit
of each "Manager" (as defined in Article 8) and may be enforced by such persons.
Other than as  expressly set forth  in this Section  9.11, nothing expressed  or
implied  in this Agreement is intended, or shall be construed, to confer upon or
give any person, firm or corporation other than the parties hereto, any  rights,
remedies,  obligations or  liabilities under or  by reason of  this Agreement or
result  in  such  person,  firm  or  corporation  being  deemed  a  third  party
beneficiary of this Agreement.
 
    9.12.  MUTUAL CONTRIBUTION.  The parties to this Agreement and their counsel
have  mutually contributed to  its drafting. Consequently,  no provision of this
Agreement shall be  construed against any  party on the  ground that such  party
drafted  the provision or  caused it to  be drafted or  the provision contains a
covenant of such party.
 
    9.13.   COUNTERPARTS.    This Agreement  may  be  executed in  one  or  more
counterparts,  all of which shall be considered  one and the same agreement, and
shall become effective when one or more counterparts have been signed by each of
the parties hereto and delivered to each of the other parties hereto.
 
    IN WITNESS WHEREOF, the  parties hereto have executed  this Agreement as  of
the day and year first above written.
 
                                          MICROTEK MEDICAL, INC.
                                          By:
 
                                          --------------------------------------
 
                                          ISOLYSER COMPANY, INC.
 
                                          By:
 
                                          --------------------------------------
 
                                          MMI MERGER CORP.
 
                                          By:
 
                                          --------------------------------------
 
                                      A-30
<PAGE>
MORGAN KEEGAN & COMPANY, INC.
MORGAN KEEGAN TOWER
FIFTY FRONT STREET
MEMPHIS, TENNESSEE 38103
901/524-4100 TELEX 69-74324
WATS 800/366-7426
MEMBERS NEW YORK STOCK EXCHANGE, INC.
 
                                                                         ANNEX B
 
June 21, 1996
 
Board of Directors
Isolyser Company, Inc.
4320 International Boulevard
Norcross, GA 30093
 
Gentlemen:
 
    You have requested our opinion as to the fairness, from a financial point of
view,  to  the shareholders  of Isolyser  Company, Inc.  (the "Company")  of the
consideration to  be  paid  by  the Company  in  connection  with  its  proposed
acquisition  of  Microtek  Medical,  Inc.  ("Microtek"  or  the  "Seller")  (the
"Transaction") pursuant to  and in  accordance with  the terms  of that  certain
Agreement  and Plan of Merger  (the "Agreement") proposed to  be entered into by
and among the Company, a wholly owned subsidiary of the Company ("Merger Corp.")
and the Seller. Capitalized  terms used herein and  not otherwise defined  shall
have the meanings ascribed to them in the Agreement.
 
    You  have advised us that,  pursuant to the Agreement,  Merger Corp. will be
merged with and  into the  Seller, and  the Seller  will become  a wholly  owned
subsidiary of the Company. The Agreement provides that, upon consummation of the
Transaction,  each issued  and outstanding share  of the  Seller's Common Stock,
$.01 par value (the "Seller Common Stock"), will be converted into the right  to
receive  such number of shares  of Company Common Stock,  $.001 par value, as is
equal to the  quotient obtained by  dividing $16.50 by  the Determination  Price
(subject  to adjustment  as described in  the Agreement). The  shares of Company
Common Stock issuable to the holders of the issued and outstanding shares of the
Seller Common  Stock pursuant  to the  terms of  the Agreement  are  hereinafter
referred to collectively as the "Transaction Consideration."
 
    Morgan  Keegan & Company, Inc. ("Morgan  Keegan"), as part of its investment
banking business,  is  regularly engaged  in  the valuation  of  businesses  and
securities  in connection  with mergers and  acquisitions, competitive biddings,
secondary distributions of  listed and unlisted  securities, private  placements
and  valuations for  various purposes.  We have  been retained  by the  Board of
Directors of  the Company  for  the purpose  of, and  will  receive a  fee  for,
rendering  this opinion. We  have not advised  any party in  connection with the
Transaction other  than  the  Company  and we  make  no  recommendation  to  the
shareholders of the Company.
 
    In  connection with our opinion, we have (1) reviewed an unexecuted June 17,
1996 draft of the Agreement dated March 15, 1996 as amended (which, for purposes
of our  analysis, we  have assumed  that any  further revisions,  including  the
filling  in of blank spaces and the attachment of final exhibits and appendices,
will not materially alter  the terms and provisions  of such documents and  that
such documents will be executed as finalized); (2) held discussions with various
members  of  management  and  representatives  of  the  Company  and  the Seller
concerning each company's historical and current
 
                                      B-1
<PAGE>
Isolyser Company, Inc.
June 21, 1996
Page 2
 
operations,  financial  condition   and  prospects;   (3)  reviewed   historical
consolidated  financial  and  operating  data  that  was  publicly  available or
furnished to  us by  the Company  and Seller;  (4) reviewed  internal  financial
analyses,  financial  and  operating forecasts,  reports  and  other information
prepared by officers  and representatives  of the  Company and  the Seller;  (5)
reviewed  certain publicly available  information with respect  to certain other
companies that we believe to be comparable to the Seller and the trading markets
for such other  companies' securities; (6)  reviewed certain publicly  available
information  concerning the terms  of certain other  transactions that we deemed
relevant to our inquiry;  (7) conducted such  other financial studies,  analyses
and investigations as we deemed appropriate for the purposes of this opinion.
 
    In  our review and analysis and in  arriving at our opinion, we have assumed
and relied upon the accuracy and completeness of all of the financial and  other
information  provided us or publicly available  and have assumed and relied upon
the representations and warranties  of the Company and  Seller contained in  the
Agreement. We have not been engaged to, and have not independently attempted to,
verify  any of such information. We have also relied upon the managements of the
Company and Seller as to the  reasonableness and achievability of the  financial
and  operating projections and the assumptions and bases therefor provided to us
and, with your  consent, we have  assumed that such  projections, including  and
without  limitation cost savings  and operating synergies  from the Transaction,
reflect the best currently available estimates and judgments of such  respective
managements  of the Company  and Seller and that  such projections and forecasts
will be realized  in the  amounts and time  periods currently  estimated by  the
managements  of the Company and  Seller. We have not  been engaged to assess the
achievability of such projections  or the assumptions on  which they were  based
and  express no view as to such projections or assumptions. In addition, we have
not conducted  a  physical  inspection  or  appraisal  of  any  of  the  assets,
properties  or  facilities of  either the  Company  or Seller  nor have  we been
furnished with any such evaluation or  appraisal. We have also assumed that  the
conditions  to the Transaction as set forth in the Agreement would be satisfied;
and that the Transaction would  be consummated on a  timely basis in the  manner
contemplated  in the Agreement  and that, as contemplated  by the Agreement, the
Merger will be accounted  for as a  pooling of interests.  Our opinion is  based
upon  analyses of the  foregoing factors in  light of our  assessment of general
economic, financial and market conditions as they exist and can be evaluated  by
us as of the date hereof. We express no opinion as to the price or trading range
at  which shares  of the  Company's Common Stock  will trade  following the date
hereof, or upon completion of the Transaction.
 
    Morgan Keegan has provided other investment banking services to the Company,
including  advising  it  with  respect  to  the  acquisition  of  White   Knight
Healthcare,  Inc.  in  1995, acting  as  managing underwriter  of  the Company's
initial public offering  in 1994  and lead manager  of a  follow-on offering  of
Common  Stock of the Company in 1995. In the ordinary course of our business, we
serve as a market maker for the Company's Common Stock and trade shares for  our
own  account and the accounts of our  customers. Accordingly, we may at any time
hold long or short positions in the Company's Common Stock.
 
    It is understood that this  opinion is not to be  quoted or referred to,  in
whole  or  in part  (including excerpts  or summaries),  in any  filing, report,
document, release or other communication used in connection with the Transaction
(unless  required  to  be  quoted  or  referred  to  by  applicable   regulatory
requirements),  nor shall this  opinion be used for  any other purposes, without
our prior written  consent, which  consent shall not  be unreasonably  withheld.
Furthermore,  our opinion  is directed to  the Company's Board  of Directors and
does not constitute a recommendation to any shareholder of the Company.
 
                                      B-2
<PAGE>
Isolyser Company, Inc.
June 21, 1996
Page 3
 
    Based upon and subject to the foregoing and based upon such other matters as
we consider  relevant, it  is  our opinion  that, as  of  the date  hereof,  the
Transaction  Consideration  is fair,  from  a financial  point  of view,  to the
shareholders of the Company.
 
Yours very truly,
 
/s/ MORGAN KEEGAN & COMPANY, INC.
- --------------------------------------
    MORGAN KEEGAN & COMPANY, INC.
 
                                      B-3
<PAGE>
                                 [LOGO]
 
                                                                      APPENDIX C
 
PERSONAL AND CONFIDENTIAL
July 29, 1996
Board of Directors
Microtek Medical, Inc.
512 Lehmberg Road
Columbus, MS 39702
Gentlemen:
 
    You  have requested  our opinion as  to the  fairness to the  holders of the
outstanding shares of Common Stock, par value $.01 per share (the "Shares"),  of
Microtek Medical, Inc. (the "Company") of the exchange ratio of 1.6500 shares of
Common  Stock, par  value $.001 per  share (the "Isolyser  Shares"), of Isolyser
Company, Inc. ("Isolyser") to be received for each Share (the "Exchange  Ratio")
pursuant  to the  Agreement and Plan  of Merger dated  as of March  15, 1996, as
amended as of  June 23,  1996 and  as further amended  on July  29, 1996,  among
Isolyser,  MMI Merger Corp. ("MMI"), a  wholly-owned subsidiary of Isolyser, and
the Company (the "Agreement").
 
    Goldman, Sachs  &  Co., as  part  of  its investment  banking  business,  is
continually  engaged  in the  valuation of  businesses  and their  securities in
connection with mergers and acquisitions, negotiated underwritings,  competitive
biddings,  secondary distributions  of listed  and unlisted  securities, private
placements and  valuations for  estate,  corporate and  other purposes.  We  are
familiar with the Company having provided certain investment banking services to
the  Company from time to time, including  having acted as its financial advisor
in connection  with, and  having  participated in  certain of  the  negotiations
leading to, the Agreement.
 
    In  connection with this opinion, we  have reviewed, among other things, the
Agreement; the Registration  Statement on  Form S-4, including  the Joint  Proxy
Statement-Prospectus  relating to  the Special  Meetings of  stockholders of the
Company and of Isolyser;  Annual Reports to Stockholders  and Annual Reports  on
Form  10-K of the Company for the four fiscal years ended November 30, 1995, and
of Isolyser for the two  years ended December 31,  1995; Form S-1 dated  October
20,  1994, of  Isolyser; certain interim  reports to  stockholders and Quarterly
Reports  on  Form  10-Q   of  the  Company  and   of  Isolyser;  certain   other
communications  from the Company and  Isolyser to their respective stockholders;
and certain  internal  financial analyses  and  forecasts for  the  Company  and
Isolyser prepared by
 
                                      C-1
<PAGE>
their  respective managements. We also have held discussions with members of the
senior management of the Company and of Isolyser regarding the past and  current
business   operations,  financial  condition  and   future  prospects  of  their
respective companies.  In addition,  we  have reviewed  the reported  price  and
trading  activity for the  Shares and for the  Isolyser Shares, compared certain
financial and stock  market information for  the Company and  for Isolyser  with
similar  information for  certain other  companies the  securities of  which are
publicly traded,  reviewed  the  financial  terms  of  certain  recent  business
combinations in the medical device and hospital supply industry specifically and
in  other industries generally and performed  such other studies and analyses as
we considered appropriate.
 
    We have  relied  without  independent verification  upon  the  accuracy  and
completeness  of all of the  financial and other information  reviewed by us for
purposes of this opinion.  In that regard, we  have assumed, with your  consent,
that  the financial forecasts  for the Company  and Isolyser, including, without
limitation, projected cost  savings and operating  synergies resulting from  the
Merger  (as defined in the Merger Agreement)  have been reasonably prepared on a
basis reflecting the  best currently  available judgments and  estimates of  the
Company  and of Isolyser and  that such financial forecasts  will be realized in
the amounts and at the times contemplated thereby. In addition, we have not made
an independent evaluation  or appraisal  of the  assets and  liabilities of  the
Company  or Isolyser or any of their subsidiaries and we have not been furnished
with any such evaluation or appraisal. We have assumed, with your consent,  that
the  consummation of the Merger will be  accounted for as a pooling of interests
under generally accepted accounting principles.
 
    Based upon and subject to the foregoing and based upon such other matters as
we consider relevant, it is our opinion that as of the date hereof the  Exchange
Ratio pursuant to the Agreement is fair to the holders of Shares.
 
Very truly yours,
 
/s/ GOLDMAN, SACHS & CO.
 
GOLDMAN, SACHS & CO.
 
                                      C-2


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