NL INDUSTRIES INC
DEF 14A, 1998-04-06
INDUSTRIAL INORGANIC CHEMICALS
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                           SCHEDULE 14A INFORMATION
               Proxy Statement Pursuant to Section 14(a) of the
                        Securities Exchange Act of 1934

Filed by Registrant:                           [X]
Filed by a Party other than the Registrant     [ ]

Check the appropriate box:

[ ]  Preliminary Proxy Statement   [  ] Confidential, for Use of the Commission
                                        Only as permitted by Rule 14a-6(e)(2))0
[X]  Definitive Proxy Statement
[X]  Definitive Additional Materials
[ ]  Soliciting Materials Pursuant to SS.240.14a-11(c) or SS.240.14a-12

- ------------------------------------------------------------------------------
                          NL INDUSTRIES, INC.
               (Name of Registrant as Specified in Its Charter)
- ------------------------------------------------------------------------------
   (Name of Person(s) Filing Proxy Statement, if other than the Registrant)

Payment of Filing Fee (Check the appropriate box):

[X]  No fee required.

[ ] Fee computed on table below per Exchange Act Rules 14a-6(i)(4) and 0-11.

     1) Title of each class of securities to which transaction applies:

     2) Aggregate number of securities to which transaction applies:

     3)  Per unit  price  or other  underlying  value  of  transaction  computed
         pursuant  to  Exchange  Act Rule  0-11 (Set  forth  amount on which the
         filing fee is calculated and state how it was determined):

     4) Proposed maximum aggregate value of transaction:

     5) Total fee paid:

[  ] Fee paid previously with preliminary materials.

[ ] Check box if any part of the fee is offset as provided by Exchange  Act Rule
0-11(a)(2)  and  identify  the  filing  for  which the  offsetting  fee was paid
previously.  Identify the previous filing by registration  statement  number, or
the Form or Schedule and the date of its filing.

     1)  Amount Previously Paid:

     2)  Form, Schedule or Registration Statement No.:

     3)  Filing Party:

     4)  Date Filed:








<PAGE>








                             NL Industries, Inc.
                      16825 Northchase Drive, Suite 1200
                             Houston, Texas 77060



                                March 26, 1998



Dear Shareholder:

     You are cordially invited to attend the 1998 Annual Meeting of Shareholders
of NL Industries,  Inc., which will be held on Wednesday,  May 6, 1998, at 10:00
a.m.  (C.D.T.) at the offices of Valhi,  Inc.  located at Three Lincoln  Centre,
5430 LBJ Freeway,  Suite 1700,  Dallas,  Texas. In addition to the matters to be
acted upon at the meeting,  which are described in detail in the attached Notice
of Annual Meeting of Shareholders and Proxy Statement, we will update you on the
Company. I hope that you will be able to attend.

     Whether or not you plan to be at the meeting,  please complete,  date, sign
and return the proxy card or voting  instruction  form  enclosed with this Proxy
Statement  promptly so that your shares are represented at the Meeting and voted
in accordance with your wishes.  Your vote,  whether given by proxy or in person
at the Meeting,  will be held in confidence by the Inspector of Election for the
meeting in accordance with NL's By-Laws.


                                        Sincerely,





                                        J. Landis Martin
                                        President and Chief Executive Officer








<PAGE>




                              NL Industries, Inc.
                      16825 Northchase Drive, Suite 1200
                             Houston, Texas 77060

                   NOTICE OF ANNUAL MEETING OF SHAREHOLDERS

                            To Be Held May 6, 1998

To the Shareholders of NL Industries, Inc.:

      NOTICE IS HEREBY GIVEN that the 1998 Annual Meeting of  Shareholders  (the
"Annual  Meeting")  of NL  Industries,  Inc.,  a  New  Jersey  corporation  (the
"Company"  or "NL"),  will be held on  Wednesday,  May 6,  1998,  at 10:00  a.m.
(C.D.T.) at the offices of Valhi, Inc. located at Three Lincoln Centre, 5430 LBJ
Freeway, Suite 1700, Dallas, Texas, for the following purposes:

      1.   To elect seven  directors  to serve until the 1999 Annual  Meeting of
           Shareholders   and  until  their  successors  are  duly  elected  and
           qualified;

      2.   To consider and vote on a proposal to adopt the NL  Industries,  Inc.
           1998 Long-Term Incentive Plan; and

      3.   To  transact  such other  business  as may  properly  come before the
           Annual Meeting or any adjournment or postponement thereof.

      The Board of  Directors  of the Company set the close of business on March
18,  1998 as the  record  date (the  "Record  Date")  for the  determination  of
shareholders  entitled  to notice of, and to vote at, the Annual  Meeting.  Only
holders  of  record of NL's  common  stock,  $.125 par value per share  ("Common
Stock"),  at the close of business on the Record Date are entitled to notice of,
and to vote at, the Annual Meeting.  The Company's stock transfer books will not
be closed following the Record Date.

      You are cordially invited to attend the Annual Meeting. Whether or not you
expect to attend the Annual Meeting in person,  please complete,  sign, date and
mail the enclosed  proxy card or voting  instruction  form promptly so that your
shares may be represented and voted at the Annual  Meeting.  You may revoke your
proxy by following the procedures set forth in the accompanying Proxy Statement.
If you  choose,  you may vote in person at the Annual  Meeting  even  though you
previously submitted your proxy.

                                   By order of the Board of Directors,



                                   David B. Garten
                                   Vice President, Secretary and General Counsel


Houston, Texas
March 26, 1998


<PAGE>



                               NL Industries, Inc.
                       16825 Northchase Drive, Suite 1200
                              Houston, Texas 77060

                            ------------------------
                                 PROXY STATEMENT
                            ------------------------


                               GENERAL INFORMATION

      This Proxy Statement and the accompanying proxy card or voting instruction
form are being furnished in connection  with the  solicitation of proxies by and
on behalf of the Board of Directors (the "Board") of NL Industries,  Inc., a New
Jersey corporation (the "Company" or "NL"), for use at the Company's 1998 Annual
Meeting of Shareholders to be held at 10:00 a.m.  (C.D.T.) on Wednesday,  May 6,
1998, at the offices of Valhi,  Inc.  located at Three Lincoln Centre,  5430 LBJ
Freeway,  Suite  1700,  Dallas,  Texas  75240-2697,  and at any  adjournment  or
postponement  thereof  (the  "Annual  Meeting").  This Proxy  Statement  and the
accompanying  proxy card or voting  instruction  form were  first  mailed to the
holders  of the  Company's  common  stock,  $.125 par  value per share  ("Common
Stock"), on or about April 6, 1998.


                            PURPOSE OF ANNUAL MEETING

      At the Annual Meeting,  shareholders of the Company will consider and vote
upon (i) the  election  of seven  directors  to serve until the  Company's  1999
Annual Meeting of Shareholders  and until their  successors are duly elected and
qualified,  (ii) a proposal  to adopt the NL  Industries,  Inc.  1998  Long-Term
Incentive Plan (the "Plan"),  and (iii) such other business as may properly come
before the Annual  Meeting.  The  Company is not aware of any  business  to come
before the Annual  Meeting other than the election of directors and the proposal
to adopt the Plan.


                  QUORUM AND VOTING RIGHTS; PROXY SOLICITATION

      The  presence  in person or by proxy of the  holders of a majority  of the
votes represented by the outstanding  shares of Common Stock entitled to vote at
the Annual  Meeting  is  necessary  to  constitute  a quorum for the  conduct of
business at the Annual Meeting. Director nominees will be elected by a plurality
of the votes  cast.  Except as may be  provided  in the  Company's  Amended  and
Restated Certificate of Incorporation (the "Certificate"), any other matter that
may be submitted to a shareholder vote, including the adoption of the Plan, will
require  the  affirmative  vote of a  majority  of the votes  cast at the Annual
Meeting.  Shares of Common Stock that are voted to abstain from business  coming
before the Annual Meeting and broker/nominee  non-votes will be counted as being
in attendance at the Annual Meeting for purposes of determining whether a quorum
is present,  but will not be counted as votes for or against  any matter  coming
before the Annual  Meeting.  The  accompanying  proxy card provides  space for a
shareholder  to  withhold  voting  for  any or all  nominees  for the  Board  of
Directors.  Because director nominees must receive a plurality of the votes cast
at the Annual Meeting, a vote withheld from a particular nominee will not affect
the election of that nominee.

      The record date for  determination of shareholders  entitled to notice of,
and to vote at, the Annual  Meeting is the close of  business  on March 18, 1998
(the "Record  Date").  As of the Record Date,  there were issued and outstanding
51,290,614 shares of Common Stock, each of which entitles the holder to one vote
on all matters that come before the Annual Meeting.  Valhi,  Inc.  ("Valhi"),  a
diversified  company  engaged in the  chemicals,  component  products  and waste
management industries,  and Tremont Corporation  ("Tremont"),  a holding company
engaged in the titanium metals and chemicals industries,  held approximately 58%
and 18%,  respectively,  of the outstanding shares of the Common Stock as of the
Record Date and have indicated their intention to have their shares  represented
at the  Annual  Meeting.  Both  Valhi and  Tremont  are  affiliates  of  Contran
Corporation  ("Contran").  See "Security Ownership" and "Election of Directors."
If the shares of Common  Stock held by Valhi and Tremont  together or the shares
of Common Stock held by Valhi alone are  represented  at the Annual  Meeting,  a
quorum will be present.


<PAGE>



      All shares of Common Stock  represented by properly executed proxies will,
unless such proxies have been  previously  revoked,  be voted in accordance with
the  instructions  indicated  in  such  proxies.  If no  such  instructions  are
indicated,  such  shares  will be voted  (i)  "FOR"  the  election  of the seven
nominees for  director,  (ii) "FOR" the  adoption of the Plan,  and (iii) in the
discretion  of the proxy  holders on any other  matter  that may  properly  come
before the Annual  Meeting.  Any  holder of Common  Stock has the  unconditional
right to revoke his or her proxy at any time prior to the voting  thereof at the
Annual Meeting by (i) filing with the Company's  Secretary written revocation of
his or her proxy,  (ii) giving a duly  executed  proxy  bearing a later date, or
(iii) voting in person at the Annual Meeting. Attendance by a shareholder at the
Annual Meeting will not in itself revoke his or her proxy.

      This  proxy   solicitation  is  made  by  and  on  behalf  of  the  Board.
Solicitation  of  proxies  for use at the  Annual  Meeting  may be made by mail,
telephone or in person,  by  directors,  officers  and regular  employees of the
Company.   Such  persons  will  receive  no  additional   compensation  for  any
solicitation   activities.   The  Company  will  request  banking  institutions,
brokerage  firms,  custodians,  trustees,  nominees and  fiduciaries  to forward
solicitation  materials to the beneficial  owners of Common Stock held of record
by such entities, and the Company will, upon the request of such record holders,
reimburse  reasonable  forwarding  expenses.  The costs of preparing,  printing,
assembling  and mailing the Proxy  Statement,  proxy card or voting  instruction
form and all materials used in the solicitation of proxies from  shareholders of
the Company,  and all clerical and other expenses of such solicitation,  will be
borne by the Company.

      First Chicago Trust  Company of New York ("First  Chicago"),  the transfer
agent and  registrar for the Common  Stock,  has been  appointed by the Board to
serve as inspector of election  (the  "Inspector  of Election") to determine the
number of shares of Common Stock  represented  and voted at the Annual  Meeting.
All proxies and ballots delivered to First Chicago shall be kept confidential by
First Chicago in accordance with the terms of the Company's By-Laws.


      IT IS THE INTENTION OF THE AGENTS DESIGNATED IN THE ENCLOSED PROXY CARD TO
VOTE "FOR" THE ELECTION OF ALL SEVEN NOMINEES FOR DIRECTOR  IDENTIFIED BELOW AND
"FOR"  ADOPTION OF THE PLAN  UNLESS  AUTHORITY  IS  WITHHELD BY THE  SHAREHOLDER
GRANTING THE PROXY. IF ANY NOMINEE BECOMES  UNAVAILABLE TO SERVE FOR ANY REASON,
THE PROXY WILL BE VOTED FOR A  SUBSTITUTE  NOMINEE OR NOMINEES TO BE SELECTED BY
THE BOARD,  UNLESS THE SHAREHOLDER  WITHHOLDS AUTHORITY TO VOTE FOR THE ELECTION
OF  DIRECTORS.  VALHI  AND  TREMONT,  WHICH  HOLD  APPROXIMATELY  58%  AND  18%,
RESPECTIVELY,  OF THE OUTSTANDING  COMMON STOCK,  HAVE INFORMED THE COMPANY THAT
THEY  INTEND TO VOTE  THEIR  SHARES IN FAVOR OF THE  NOMINEES  SET FORTH IN THIS
PROXY  STATEMENT  AND IN FAVOR OF  ADOPTION OF THE PLAN.  VALHI'S AND  TREMONT'S
VOTES  TOGETHER,  OR VALHI'S  VOTES  ALONE,  ARE  SUFFICIENT  TO ELECT ALL SEVEN
NOMINEES AND TO APPROVE ADOPTION OF THE PLAN.


                              ELECTION OF DIRECTORS

      The Certificate  provides for a Board of Directors  consisting of not less
than seven and not more than  seventeen  persons,  as such number is  determined
from time to time by a majority of the entire  Board.  The Board has  determined
that it shall consist of seven members.

      At the  Annual  Meeting,  holders  of Common  Stock will be asked to elect
seven  nominees  to the Board,  each to serve for a one year term  ending at the
1999  Annual  Meeting of  Shareholders  or until his  successor  shall have been
elected and qualified or until his earlier resignation, removal or death. All of
the nominees are currently  directors of the Company and have agreed to serve if
elected.

     THE BOARD OF  DIRECTORS  RECOMMENDS  A VOTE "FOR" THE  NOMINEES  IDENTIFIED
BELOW.




<PAGE>



Nominees for Director

      The  information  provided  below  has  been  provided  by the  respective
nominees  for  election  as  directors  for a term  expiring  at the 1999 Annual
Meeting of  Shareholders  of the  Company.  Each of the  following  nominees for
election is currently a director of the Company whose term expires at the Annual
Meeting.

      JOSEPH S.  COMPOFELICE,  age 48, has been a director of NL since 1995. Mr.
Compofelice has been Chairman and CEO of CompX International Inc.  ("CompX"),  a
majority owned indirect subsidiary of Valhi that manufactures ergonomic computer
support systems and other component hardware  products,  since February 1998. He
served as Vice  President  and Chief  Financial  Officer  of NL from 1994  until
February 1998. Mr.  Compofelice  has served as Executive Vice President of Valhi
since 1994 and as Vice  President  and Chief  Financial  Officer of Tremont from
1994 until February 1998. Except for a period during 1996 he has been a director
of Titanium Metals  Corporation  ("TIMET"),  an integrated  producer of titanium
metals  products  which is 30% owned by Tremont.  From 1996 until February 1998,
Mr.  Compofelice  also served as Vice President and Chief  Financial  Officer of
TIMET. From prior to 1993 to 1993, Mr.  Compofelice served as Vice President and
Chief Financial Officer of Baroid Corporation  ("Baroid"),  a company engaged in
the petroleum services industry which was acquired by Dresser  Industries,  Inc.
("Dresser") in January 1994.

      J. LANDIS MARTIN,  age 52, has been President and Chief Executive  Officer
of NL since 1987,  and a director of NL since 1986. He has served as Chairman of
the Board, President and Chief Executive Officer of Tremont since prior to 1993.
Mr. Martin also has served as Chairman of the Board of TIMET since prior to 1993
and Chief Executive Officer of TIMET since 1995. From prior to 1993 to 1994, Mr.
Martin  also served as Chairman of the Board,  Chief  Executive  Officer,  and a
director  of Baroid.  Mr.  Martin is a  director  of  Dresser  and of  Apartment
Investment and Management Corporation, a real estate investment trust.

     KENNETH R. PEAK, age 52, has been a director of NL since 1989.  Since prior
to 1993,  Mr.  Peak has been  President  of Peak  Enernomics,  Inc.,  an  energy
industry  consulting  firm.  Mr. Peak  serves as a director  of Cheniere  Energy
Company, an oil and gas exploration company. He serves as Chairman of NL's Audit
Committee and Management  Development and Compensation Committee and is a member
of NL's Nominations Committee.

     GLENN R. SIMMONS, age 70, has been a director of NL since 1986. Mr. Simmons
is Chairman of the Board of Keystone Consolidated Industries, Inc. ("Keystone"),
a steel fabricated wire products,  industrial wire and carbon steel rod company.
Since prior to 1993,  Mr.  Simmons has been Vice  Chairman of the Board of Valhi
and Contran,  a diversified  holding  company which directly and through related
entities holds  approximately  93% of the outstanding  common stock of Valhi and
46% of the outstanding common stock of Keystone.  Mr. Simmons is also a director
of Tremont and CompX. Mr. Simmons has been an executive  officer and/or director
of various  companies  related to Valhi and  Contran  since  1969.  He serves as
Chairman of NL's Nominations Committee. He is a brother of Harold C. Simmons.

     HAROLD  C.  SIMMONS,  age 66,  has been a  director  of NL  since  1986 and
Chairman  of the Board of NL since 1987.  He has been  Chairman of the Board and
Chief  Executive  Officer of Valhi and Contran  since prior to 1993 and has been
President  of Valhi and Contran  since 1994.  Mr.  Simmons is also a director of
Tremont.  Mr. Simmons has been an executive  officer and/or  director of various
companies  related to Valhi and Contran  since 1964. He is a brother of Glenn R.
Simmons.

     LAWRENCE  A.  WIGDOR,  age 56,  has  been a  director  and  Executive  Vice
President of NL since 1992.  Dr. Wigdor has been  President and Chief  Executive
Officer of Kronos, Inc. ("Kronos"), a wholly-owned subsidiary of NL, since prior
to 1993 and President and Chief Executive  Officer of Rheox, Inc.  ("Rheox"),  a
wholly-owned  subsidiary  of NL involved in the  specialty  chemicals  business,
since prior to 1993 until January 1998. The specialty  chemicals  business owned
by Rheox was sold in January 1998 and Rheox was renamed NL Capital Corporation.

     ELMO R. ZUMWALT, JR., age 77, has been a director of NL since 1987. He is a
retired United States Navy Admiral and served as Chief of Naval Operations and a
member of the Joint Chiefs of Staff from 1970 to 1974. He has been  President of
Admiral Zumwalt & Consultants,  Inc., a Washington-based  consulting firm, since
prior to 1993. Admiral Zumwalt is a director of Magellan Aerospace  Corporation,
Dallas Semiconductor  Corporation,  and IDT Corporation.  He is also Chairman of

<PAGE>

the  International  Consortium  for Research on the Health Effects of Radiation,
Chairman of the Marrow  Foundation  and Chairman of the Ethics and Public Policy
Center and a member of the  President's  Foreign  Intelligence  Advisory  Board.
Admiral  Zumwalt is a member of NL's  Management  Development  and  Compensation
Committee, Audit Committee, and Nominations Committee.

      For information  concerning legal  proceedings to which certain  directors
are  parties  and  other  matters,   see  "Certain   Litigation"   and  "Certain
Relationships and Transactions."


                             MEETINGS AND COMMITTEES

      The Board held five meetings and took action by written consent in lieu of
a meeting on five occasions in 1997. Each of the directors  participated in more
than 75% of the total number of meetings of the Board and committees on which he
served  that were held  during  1997,  and each of the  directors  executed  all
written consents of the Board during the year.

      The Board has established three standing committees, an Audit Committee, a
Management  Development and Compensation  Committee and a Nominations Committee,
all of which are composed  entirely of individuals  who are not employees of the
Company.

      Audit Committee. The principal responsibilities of the Audit Committee are
to recommend to the Board the selection of the firm of independent  auditors; to
review the plan and results of the independent audit engagement, the program for
internal auditing,  the system of internal  accounting controls and the internal
audit results;  to review and approve the professional  services provided by the
independent auditors;  and to direct and supervise special audit inquiries.  The
Committee held two meetings in 1997. The current  members of the Audit Committee
are Mr. Peak, Chairman, and Admiral Zumwalt.

      Management   Development  and   Compensation   Committee.   The  principal
responsibilities of the Management Development and Compensation Committee are to
review and make recommendations  regarding executive  compensation  policies and
periodically review and approve or make  recommendations with respect to matters
involving  executive  compensation,  to  take  action  or  to  review  and  make
recommendations to the Board regarding  employee benefit plans or programs,  and
to serve as a counseling  committee  to the Chief  Executive  Officer  regarding
matters  of key  personnel  selection,  organization  strategies  and such other
matters as the Board may from time to time direct.  The  Management  Development
and Compensation Committee also has been responsible for reviewing and approving
stock  option and other  stock-based  compensation  awards  under the  Company's
incentive plans. The Management  Development and Compensation Committee held one
meeting and took action by written  consent in lieu of a meeting on one occasion
in 1997. Its current members are Mr. Peak, Chairman, and Admiral Zumwalt.

      Nominations Committee.  The principal  responsibilities of the Nominations
Committee are to review and make  recommendations  to the Board  regarding  such
matters  as the size and  composition  of the Board and  criteria  for  director
nominations,  director  candidates,  the term of office of  directors,  and such
other  related  matters  as the  Board  may  request  from  time  to  time.  The
Nominations  Committee  held one  meeting in 1997.  The  current  members of the
Nominations Committee are Mr. Glenn Simmons,  Chairman,  Admiral Zumwalt and Mr.
Peak.  The  Nominations  Committee  made  its  recommendations  to the  Board of
Directors with respect to the election of directors at the Annual  Meeting.  The
Nominations  Committee  will consider  recommendations  by  shareholders  of the
Company   with   respect  to   nominees   for   election  as  director  if  such
recommendations  are  submitted  in writing to the  Secretary of the Company and
received not later than December 31 of the year prior to the next annual meeting
of shareholders,  and are accompanied by a full statement of qualifications  and
confirmation of the recommended nominees' willingness to serve.

      The Board has previously established, and from time to time may establish,
other committees to assist it in discharging its responsibilities.


<PAGE>

                        EXECUTIVE OFFICERS OF THE COMPANY

     Set forth below is certain  information  relating to the current  executive
officers  of the  Company.  Biographical  information  with  respect  to Messrs.
Simmons  and  Martin  and Dr.  Wigdor  is set forth  above  under  "Election  of
Directors."

<TABLE>
<CAPTION>
             Name                   Age            Position(s)
  <S>                                <C>   <C>

  Harold C. Simmons.............     66    Chairman of the Board

  J. Landis Martin..............     52    President and Chief Executive Officer

  Dr. Lawrence A. Wigdor........     56    Executive Vice President; President
                                           and Chief Executive Officer of Kronos

  Susan E. Alderton.............     46    Vice President, Chief Financial Officer and Treasurer

  David B. Garten...............     46    Vice President, General Counsel and Secretary

  Robert D. Hardy...............     37    Vice President - Tax

  Dennis G. Newkirk.............     47    Vice President and Controller
</TABLE>

      Susan E.  Alderton has been Chief  Financial  Officer of the Company since
February  1998 and Vice  President  and  Treasurer of the Company since prior to
1993. Ms. Alderton has been a director of Tremont since prior to 1993.

      David B. Garten has been Vice President,  General Counsel and Secretary of
the Company since prior to 1993.  From prior to 1993 to 1993,  Mr. Garten served
as Vice President and General Counsel of Tremont.

      Robert  D.  Hardy  has been  Vice  President  - Tax of the  Company  since
February  1998.  From prior to 1993 to 1998,  Mr. Hardy served as the  Company's
Director of Taxes.

      Dennis G. Newkirk has been Vice  President  and  Controller of the Company
since prior to 1993.


<PAGE>

                               SECURITY OWNERSHIP

      Ownership of NL Common Stock. The following table and  accompanying  notes
set  forth as of the  Record  Date  the  beneficial  ownership,  as  defined  by
regulations of the Commission,  of Common Stock held by (a) each person or group
of  persons  known by NL to  beneficially  own more  than 5% of the  outstanding
shares of Common  Stock,  (b) each  director or nominee for  director of NL, (c)
each executive officer of NL listed on the Summary Compensation Table below, and
(d) all executive  officers and  directors of NL as a group.  See note (3) below
for  information  concerning  individuals  and  entities  which may be deemed to
indirectly  beneficially own those shares of Common Stock directly  beneficially
held by Valhi and Tremont, as reported in the table below. No securities of NL's
subsidiaries are beneficially  owned by any director,  nominee for director,  or
officer of NL.  Information  concerning  ownership of equity  securities of NL's
parent  companies is contained in note (3) below and the table under the caption
"Ownership of Valhi and Tremont  Common Stock" below.  All  information is taken
from or based upon ownership filings made by such persons with the Commission or
information provided by such persons to NL.


<TABLE>
<CAPTION>

                                                         NL Common Stock
                                        ----------------------------------------
         Name of                        Amount and Nature of           Percent
   Beneficial Owner                     Beneficial Ownership(1)      of Class(2)
   ----------------                     -----------------------      -----------
<S>                                       <C>                        <C>
Valhi, Inc.                                  29,844,210(3)           58.2%
  Three Lincoln Centre
  5430 LBJ Freeway
  Suite 1700
  Dallas, TX 75240
Tremont Corporation                           9,064,780(3)           17.7%
  1999 Broadway
  Suite 4300
  Denver, CO 80202
Joseph S. Compofelice                       165,783(4)               --
J. Landis Martin                            993,751(5)               1.9%
Kenneth R. Peak                               7,825(6)               --
Glenn R. Simmons                              6,800(3)               --
Harold C. Simmons                            69,475(3)(7)            --
Dr. Lawrence A. Wigdor                      483,899(8)               --
Admiral Elmo R. Zumwalt, Jr.                  4,400(9)               --
David B. Garten                             245,800(10)              --
Dennis G. Newkirk                           185,600(11)              --
All directors and executive officers
  of the Company as a group
  (11 persons)                            2,352,147(3)(4)(5)(6)(7)   4.6%
                                                   (8)(9)(10)(11)(12)
</TABLE>

- ---------

(1)  All beneficial ownership is sole and direct unless otherwise noted.

(2)  No percent of class is shown for holdings of less than 1%.

(3)  Valhi Group,  Inc.  ("VGI"),  National City Lines,  Inc.  ("National")  and
     Contran  are  the   holders  of   approximately   74.8%,   9.5%  and  7.8%,
     respectively, of the outstanding common stock, $.01 par value per share, of
     Valhi, Inc. (the "Valhi Common Stock").  VGI, National,  the Harold Simmons
     Foundation,  Inc. (the "Foundation"),  Contran and Valhi hold approximately
     35.1%, 5.2%, 3.7%, 3.5% and 1.5%,  respectively,  of the outstanding common
     stock,  $1.00 par value per share, of Tremont (the "Tremont Common Stock").
     In  addition,  NL and  Valmont  each hold  0.5% of  Tremont  Common  Stock.
     National, NOA, Inc. ("NOA") and Dixie Holding Company ("Dixie Holding") are
     the holders of approximately 73.3%, 11.4% and 15.3%,  respectively,  of the
     outstanding  common  stock  of VGI.  Contran  and NOA  are the  holders  of
     approximately  85.7% and 14.3%,  respectively,  of the  outstanding  common
     stock of National.  Contran and  Southwest  Louisiana  Land  Company,  Inc.
     ("Southwest")   are  the   holders  of   approximately   49.9%  and  50.1%,
     respectively,   of  the  outstanding   common  stock  of  NOA.  Dixie  Rice
     Agricultural Corporation,  Inc. ("Dixie Rice") is the holder of 100% of the
     outstanding  common  stock of  Dixie  Holding.  Contran  is the  holder  of
     approximately  88.8% and 54.3% of the outstanding common stock of Southwest
     and Dixie Rice,  respectively.  Substantially all of Contran's  outstanding
     voting  stock is held by trusts  established  for the benefit of certain of
     Harold C. Simmons'  children and  grandchildren  (the  "Trusts"),  of which
     Harold C.  Simmons is the sole  trustee.  As sole  trustee  of the  Trusts,
     Harold C. Simmons has the power to vote and direct the  disposition  of the
     shares of Contran  common  stock held by each of the Trusts.  Mr.  Simmons,
     however, disclaims beneficial ownership of such Contran shares.

<PAGE>

     The  Combined   Master   Retirement   Trust  (the  "Master   Trust")  holds
     approximately  0.1% or less of the outstanding shares of Valhi Common Stock
     and  Tremont  Common  Stock.  The  Master  Trust was  formed to permit  the
     collective  investment  by trusts  that  maintain  the  assets  of  certain
     employee  benefit plans adopted by Valhi and related  companies.  Harold C.
     Simmons is the sole  trustee of the Master Trust and the sole member of the
     trust investment committee for the Master Trust. The trustee and members of
     the trust investment committee for the Master Trust are selected by Valhi's
     Board of  Directors.  Harold C. Simmons and Glenn R. Simmons are members of
     Valhi's  Board  of  Directors  and are  participants  in one or more of the
     employee benefit plans which invest through the Master Trust.  Each of such
     persons,  however,  disclaims  beneficial  ownership of the shares of Valhi
     Common Stock and Tremont  Common Stock held by the Master Trust,  except to
     the extent of his individual vested beneficial  interest in the assets held
     by the Master Trust.

     Harold C. Simmons is Chairman of the Board of NL and Chairman of the Board,
     President  and Chief  Executive  Officer of Contran,  Dixie  Holding,  NOA,
     National,  VGI and Valhi.  Mr.  Simmons is also  Chairman  of the Board and
     Chief  Executive  Officer of Dixie Rice and  Southwest,  and a director  of
     Tremont. By virtue of the holding of such offices,  the stock ownership and
     his service as trustee,  all as  described  above,  (a) Mr.  Simmons may be
     deemed to control such entities,  and (b) Mr. Simmons,  and certain of such
     entities  may be deemed to possess  indirect  beneficial  ownership  of the
     Common  Stock  directly  beneficially  owned by Valhi and  Tremont  and the
     shares of Valhi Common  Stock and Tremont  Common Stock held by Contran and
     its subsidiaries.  However,  Mr. Simmons disclaims  beneficial ownership of
     the shares of Common  Stock,  Valhi Common  Stock and Tremont  Common Stock
     beneficially owned, directly and indirectly, by such entities.

     The  shares  of Valhi  Common  Stock  described  above as owned by  Contran
     include  approximately  0.2% of the outstanding Valhi Common Stock which is
     directly held by the Contran Deferred  Compensation  Trust No. 2 (the "CDCT
     No. 2").  The shares of Tremont  Common Stock  described  above as owned by
     Contran include  approximately 3.5% of the outstanding Tremont Common Stock
     which is directly  held by the CDCT No. 2.  Boston  Safe  Deposit and Trust
     Company  serves  as  trustee  of the CDCT No.  2 (the  "Trustee").  Contran
     established  the CDCT No.  2 as an  irrevocable  "rabbi  trust"  to  assist
     Contran in meeting certain deferred  compensation  obligations that it owes
     to Harold C. Simmons.  If the CDCT No. 2 assets are insufficient to satisfy
     such  obligations,  Contran must  satisfy the balance of such  obligations.
     Under the terms of the CDCT No. 2,  Contran  (i)  retains the sole power to
     vote the Valhi Common  Stock and Tremont  Common Stock held by the CDCT No.
     2, (ii) retains dispositive power over such shares, and (iii) may be deemed
     the  indirect  beneficial  owner  of  such  shares.  However,  Mr.  Simmons
     disclaims such beneficial ownership of the shares beneficially owned by the
     CDCT No. 2, except to the extent of his interest as a  beneficiary  of CDCT
     No. 2.

     The Foundation directly holds approximately 3.7% of the outstanding Tremont
     common stock and 0.5% of the outstanding Valhi common stock. The Foundation
     is a tax-exempt  foundation  organized for charitable  purposes.  Harold C.
     Simmons is the  chairman  of the board and chief  executive  officer of the
     Foundation  and may be deemed  to  control  the  Foundation.  Mr.  Simmons,
     however,   disclaims  beneficial  ownership  of  any  shares  held  by  the
     Foundation.

(4)  The shares of Common Stock shown as beneficially  owned include (i) 115,600
     shares of Common Stock which Joseph S. Compofelice has the right to acquire
     by  exercise  of options  within 60 days of the Record  Date under the 1989
     Long Term Performance Incentive Plan of NL Industries, Inc. (the "Incentive
     Plan"), (ii) 7,183 shares credited to Mr.  Compofelice's  account under the
     NL Industries, Inc. Retirement Savings Plan (the "Savings Plan"), and (iii)
     42,000 shares held by Mr. Compofelice and his wife as joint tenants.

(5)  The shares of Common Stock shown as beneficially  owned include (i) 833,277
     shares of Common  Stock which J. Landis  Martin has the right to acquire by
     exercise of options  within 60 days of the Record Date under the  Incentive
     Plan or predecessor  plans and (ii) 13,809 shares  credited to Mr. Martin's
     account under the Savings Plan.

(6)  The shares of Common Stock shown as  beneficially  owned  include (i) 4,000
     shares of Common  Stock  which  Kenneth R. Peak has the right to acquire by
     exercise of options  within 60 days of the Record  Date  pursuant to the NL
     Industries,   Inc.  1992  Non-Employee  Director  Stock  Option  Plan  (the
     "Director Plan") and (ii) 21 shares of Common Stock held by Mr. Peak's wife
     with respect to which Mr. Peak disclaims beneficial ownership.

(7)  The shares of Common Stock shown as beneficially owned by Harold C. Simmons
     constitute  shares  held  by  Mr.  Simmons'  wife  with  respect  to  which
     beneficial ownership is disclaimed by Mr. Simmons.

<PAGE>

(8)  The shares of Common  Stock shown as  beneficially  owned  include  414,399
     shares of  Common  Stock  which Dr.  Lawrence  A.  Wigdor  has the right to
     acquire by exercise of options  within 60 days of the Record Date under the
     Incentive Plan.

(9)  The shares of Common Stock shown as beneficially owned include 4,000 shares
     of Common Stock which Admiral Elmo R. Zumwalt, Jr. has the right to acquire
     by  exercise of options  within 60 days of the Record Date  pursuant to the
     Director Plan.

(10) The shares of Common Stock shown as beneficially  owned include (i) 200,800
     shares of Common  Stock  which  David B. Garten has the right to acquire by
     exercise of options  within 60 days of the Record Date under the  Incentive
     Plan,  and (ii) 15,494 shares  credited to Mr.  Garten's  account under the
     Savings Plan.

(11) The shares of Common Stock shown as beneficially  owned include (i) 149,600
     shares of Common  Stock which Dennis G. Newkirk has the right to acquire by
     exercise of options  within 60 days of the Record Date under the  Incentive
     Plan, (ii) 5,000 shares credited to Mr. Newkirk's account under the Savings
     Plan,  and (iii)  10,000  shares held by Mr.  Newkirk and his wife as joint
     tenants.

(12) In  addition  to the  foregoing,  the  shares  of  Common  Stock  shown  as
     beneficially  owned by the  directors  and  executive  officers  as a group
     include (i) 147,382  shares of Common Stock which the  remaining  executive
     officers  of the  Company  have the right to acquire by exercise of options
     within 60 days of the Record Date under the Incentive  Plan or  predecessor
     plans, and (ii) 13,181 shares credited to such  executives'  accounts under
     the Savings Plan.

     Ownership  of Valhi and  Tremont  Common  Stock.  The  following  table and
accompanying notes set forth as of the Record Date (i) the beneficial ownership,
as defined above, of Valhi Common Stock held by (a) each director or nominee for
director  of NL,  (b)  each  executive  officer  of NL  listed  in  the  Summary
Compensation  Table below, and (c) all executive officers and directors of NL as
a group, and (ii) the beneficial ownership,  as defined above, of Tremont Common
Stock held by (a) each  director  or nominee  for  director  of NL, and (b) each
executive officer of NL listed in the Summary  Compensation Table below, and (c)
all executive officers and directors of NL as a group. See note (3) to the table
following the caption  "Ownership of NL Common  Stock"  above,  for  information
concerning individuals and entities who may be deemed to indirectly beneficially
own those  shares of Common  Stock  directly  beneficially  held by Tremont  and
Valhi.  Except  as  described  in note (3)  above  and the  table  below and the
accompanying   notes,  no  equity   securities  of  NL's  parent  companies  are
beneficially owned by any director, nominee for director or executive officer of
NL. All  information is taken from or based upon ownership  filings made by such
persons with the Commission or information provided by such persons to NL.


<PAGE>

<TABLE>
<CAPTION>
                                          Tremont Common Stock                   Valhi Common Stock        
                                  ---------------------------------     -----------------------------------

                                  Amount and                            Amount and
                                  Nature of                             Nature of
            Name of               Beneficial             Percent        Beneficial               Percent
      Beneficial Owner            Ownership(1)         of Class (2)     Ownership (1)         of Class (2)
      ----------------            ------------         ------------     -------------         ------------
<S>                               <C>                    <C>             <C>                       <C>
Joseph S. Compofelice              12,200(3)              --              40,000(8)(9)             --
J. Landis Martin                  210,418(4)             3.1%             25,000                   --
Kenneth R. Peak                       -0-                 --                   -0-                 --
Glenn R. Simmons                      534(5)              --             424,533(5)(9)(10)         --
Harold C. Simmons                   3,747(5)(6)           --             430,383(5)(9)(11)         --
Dr. Lawrence A. Wigdor                -0-                 --                   -0-                 --
Admiral Elmo R. Zumwalt, Jr.          -0-                 --                   -0-                 --
David B. Garten                    12,000(7)              --                   -0-                 --
Dennis G. Newkirk                     -0-                 --                   -0-                 --
All directors and executive       
officers of the Company           247,093(3)(4)(5)       3.7%            934,916(5)(9)             --
   as a group (11 persons)               (6)(7)(12)                             (10)(11)

</TABLE>

- ---------

(1)  All beneficial ownership is sole and direct unless otherwise noted.

(2)  No percent of class is shown for  holdings of less than 1%. For purposes of
     calculating  the percent of class owned  1,186,200  shares of Valhi  Common
     Stock held by NL and 1,000,000 shares of Valhi Common Stock held by Valmont
     Insurance  Company  ("Valmont"),  a wholly-owned  subsidiary of Valhi,  are
     excluded  from the amount of Valhi  Common  Stock  outstanding  pursuant to
     Delaware law.

(3)  The shares of Tremont Common Stock shown as beneficially owned by Joseph S.
     Compofelice  include 12,200 shares held by Mr.  Compofelice and his wife as
     joint tenants.

(4)  The shares of Tremont Common Stock shown as beneficially owned by J. Landis
     Martin  include  75,500 shares of Tremont Common Stock which Mr. Martin has
     the right to acquire by  exercise  of options  within 60 days of the Record
     Date under the Tremont  Incentive  Plan, and 510 shares held by the trustee
     for the benefit of Mr. Martin under the Savings Plan.  Such shares  include
     1,800  shares held by Mr.  Martin's  wife,  2,400 shares held by the Martin
     Children's  Trust No. II for which Mr.  Martin is the sole  trustee and 100
     shares  held  by Mr.  Martin's  daughter,  with  respect  to  all of  which
     beneficial ownership is disclaimed by Mr. Martin.

(5)  Excludes  certain shares which may be deemed to be indirectly  beneficially
     owned by Harold C. Simmons as to which he disclaims  beneficial  ownership.
     See note (3) to the table following "Ownership of NL Common Stock" above.

(6)  The shares of Tremont Common Stock shown as beneficially owned by Harold C.
     Simmons  consist of shares held by Mr.  Simmons' wife with respect to which
     beneficial ownership is disclaimed by Mr. Simmons.

(7)  The shares of Tremont Common Stock shown as beneficially  owned by David B.
     Garten  include  11,500 shares which Mr. Garten has the right to acquire by
     exercise  of options  within 60 days of the Record  Date under the  Tremont
     Incentive Plan.

(8)  Includes 10,000 shares of Valhi Common Stock held by Joseph S.  Compofelice
     and his wife as joint tenants.

(9)  Includes  shares that such person or group could  acquire upon the exercise
     of stock  options  within 60 days of the Record  Date.  During  such 60-day
     period, options for 350,000 shares of Valhi Common Stock are exercisable by
     Harold C.  Simmons,  options for 380,000  shares of Valhi  Common Stock are
     exercisable by Glenn R. Simmons,  options for 30,000 shares of Valhi Common
     Stock are  exercisable  by Joseph S.  Compofelice,  and  options for 15,000
     shares of Valhi Common Stock are  exercisable  by the  remaining  executive
     officers of the  Company,  all of which  shares are  included in the amount
     outstanding  for purposes of calculating the percent of class owned by such
     persons.


<PAGE>

(10) Includes  4,383  shares of Valhi  Common  Stock  held in Glenn R.  Simmon's
     individual retirement account,  3,000 shares held by Mr. Simmons' wife, and
     800 shares held in a retirement account for Mr. Simmon's wife, with respect
     to all of which beneficial ownership is disclaimed by Mr. Simmons.

(11) Includes  77,000  shares of Valhi Common  Stock held by Harold C.  Simmons'
     wife,  with  respect to which  beneficial  ownership is  disclaimed  by Mr.
     Simmons.

(12) In addition to the  foregoing,  the shares of Tremont Common Stock shown as
     beneficially  owned by the  directors  and  executive  officers  as a group
     include 7,365 shares of Tremont Common Stock which the remaining  executive
     officers  of the  Company  have the right to acquire by exercise of options
     within 60 days of the Record Date and 11 shares  credited to an executive's
     account under the Savings Plan.

      The Company  understands  that Valhi,  Tremont  and related  entities  may
consider acquiring or disposing of shares of Common Stock through open-market or
privately-negotiated   transactions,   depending   upon   future   developments,
including,  but not limited to, the  availability and alternative uses of funds,
the performance of the Common Stock in the market, an assessment of the business
of and prospects  for the Company,  financial  and stock market  conditions  and
other factors deemed  relevant by such entities.  The Company does not presently
intend,  and understands that neither Valhi nor Tremont  presently  intends,  to
engage in any  transaction or series of  transactions  which would result in the
Common  Stock  becoming  eligible  for  termination  of  registration  under the
Securities  Exchange  Act of 1934,  as  amended,  or  ceasing  to be traded on a
national securities exchange.


             SECTION 16(a) BENEFICIAL OWNERSHIP REPORTING COMPLIANCE

      Section 16(a) of the Securities Exchange Act of 1934, as amended, requires
the Company's  executive officers,  directors,  and persons who own beneficially
more than 10% of a registered class of the Company's  equity  securities to file
reports of ownership and changes in ownership with the Commission,  the New York
Stock Exchange,  the Pacific Exchange and the Company.  Based solely on a review
of copies of the  Section  16(a)  reports  furnished  to the Company and written
representations by certain reporting  persons,  the Company believes that all of
the Company's  executive  officers,  directors  and greater than 10%  beneficial
owners filed on a timely basis all reports  required  during and with respect to
the fiscal year ended December 31, 1997.

                COMPENSATION OF DIRECTORS AND EXECUTIVE OFFICERS
                              AND OTHER INFORMATION

Compensation of Directors

     During 1997, fees were paid to each director who was not an employee of the
Company or a subsidiary of the Company.  Fees consisted of an annual retainer of
$15,000,  payable in quarterly installments,  plus an attendance fee of $750 for
each meeting of the Board or a committee at which the director was present. Such

<PAGE>

directors  also received a fee of $750 per day for each day spent on NL business
at the request of the Board or the Chairman of the Board,  other than the day of
Board or committee  meetings.  Directors are reimbursed for reasonable  expenses
incurred in attending Board of Directors and committee meetings. If any director
who is not an officer or employee of NL or any  subsidiary  or  affiliate  of NL
dies while in active  service,  his  designated  beneficiary  or estate  will be
entitled to receive a life insurance  benefit equal to the annual  retainer then
in effect.  Directors  receiving  fees for serving on the Board of  Directors in
1997 were Messrs.  Peak,  G.  Simmons,  H.  Simmons,  and Admiral  Zumwalt.  See
"Certain Relationships and Transactions."

      In 1997, Admiral Zumwalt and Mr. Peak were each granted an option pursuant
to the Director Plan (as defined above) to purchase 1,000 shares of Common Stock
at an exercise price of $12.00 per share,  representing  the last reported sales
price of Common Stock on the New York Stock Exchange  Composite Tape on the date
of grant.  Options  granted under the Director Plan become  exercisable one year
after the date of grant and expire on the fifth  anniversary  following the date
of grant.


Summary of Cash and Certain Other Compensation of Executive Officers

      The Summary  Compensation  Table set forth below provides  certain summary
information  concerning annual and long-term compensation paid or accrued by the
Company  to or on behalf of its Chief  Executive  Officer  and each of its other
four most highly compensated executive officers for services rendered during the
years ended December 31, 1997, 1996 and 1995.

<TABLE>
<CAPTION>

                                                SUMMARY COMPENSATION TABLE

                                                                                     Long Term
                                      Annual Compensation (1)                    Compensation (1) 
                                      -----------------------                    ---------------- 
                                                                                      Awards
                                                                                      ------
                                                                                           Securities
Name and                                                                  Restricted       Underlying        All Other
Principal Position            Year        Salary         Bonus (2)       Stock Awards        Options       Compensation
- ------------------            ----        ------         ---------       ------------        -------       ------------
                                           ($)              ($)              ($)               (#)            (5)($)
<S>                           <C>         <C>            <C>                 <C>             <C>              <C>
J. Landis Martin              1997        500,000        750,000             -0-             120,000            9,600
President and Chief           1996        400,000            -0-             -0-              45,000           85,000
Executive Officer (3)         1995        400,000        600,000             -0-                 -0-           94,000

Dr. Lawrence A. Wigdor        1997        550,000        825,000             -0-              90,000           14,124
Executive Vice President      1996        550,000            -0-             -0-              36,000          126,885
                              1995        550,000        825,000             -0-                 -0-          120,414

Joseph S. Compofelice         1997        260,000        390,000             -0-              45,000           12,254
Vice President and Chief      1996        185,000            -0-             -0-              24,000           32,762
Financial Officer (4)         1995        185,000        277,500             -0-              30,000           39,042

David B. Garten               1997        250,000        375,000             -0-              45,000           10,813
Vice President, Secretary     1996        250,000            -0-             -0-              12,000           45,030
and General Counsel           1995        225,000        337,500             -0-                 -0-           43,871

Dennis G. Newkirk             1997        170,000        185,300             -0-              30,000           10,425
Vice President and            1996        170,000            -0-             -0-               9,000           19,186
Controller                    1995        150,000        163,500             -0-                 -0-           22,060

</TABLE>

<PAGE>

(1)   No payouts under any long-term  incentive  plans (as defined by applicable
      federal  securities  regulations) were made during 1997, 1996 or 1995, and
      no other annual  compensation  payments  were made in 1997,  1996 or 1995.
      Therefore,  columns for such compensation otherwise required by applicable
      federal securities regulations have been omitted.

(2)   Amounts paid pursuant to the Variable Compensation Plan. See "Compensation
      Committee's Report on Executive Compensation" below.

(3)   During 1997, 1996 and 1995, Mr. Martin also served as an executive officer
      of Tremont  and TIMET.  Mr.  Martin is expected to continue to serve as an
      executive  officer of NL, TIMET and Tremont in 1998 and to be  compensated
      directly by NL for  services to NL and by TIMET for  services to TIMET and
      Tremont.  Mr.  Martin is  expected  to  continue  to devote  approximately
      one-half  of his  working  time  to his  duties  as  President  and  Chief
      Executive Officer of NL. See "Certain Relationships and Transactions."

(4)   During 1997,  1996, and 1995, Mr.  Compofelice also served as an executive
      officer of Tremont and Valhi. Mr. Compofelice  commenced  employment as an
      executive officer of TIMET in 1996. He was compensated  directly by NL and
      TIMET  and/or  Tremont for services to such  companies  in 1997,  1996 and
      1995. NL was credited by Valhi for the portion of Mr. Compofelice's salary
      earned for services  attributable  to Valhi in 1997, 1996 and 1995 against
      the amount otherwise payable by NL to Valhi pursuant to the intercorporate
      services  agreement  between NL and Valhi. See "Certain  Relationships and
      Transactions."  Amounts  paid  in  1997,  1996  and  1995  by  NL  to  Mr.
      Compofelice  that were  credited by Valhi are included in the table above.
      The amounts in the table above exclude  certain  payments made through the
      NL payroll system which were funded  entirely by an affiliate.  NL expects
      that  Valhi  will  credit  NL under  the  above-referenced  intercorporate
      services  agreement  for  the  portion  of Mr.  Compofelice's  salary  for
      services attributable to Valhi in 1998.

(5)  For 1997 represents (i) $4,524,  $2,654,  $1,213 and $825 of life insurance
     premiums  paid by the  Company  for the  benefit of Dr.  Wigdor and Messrs.
     Compofelice,  Garten and Newkirk,  respectively, and (ii) a contribution of
     $9,600 to the  account of each of the named  executive  officers  under the
     Savings Plan. For 1996 represents:  (i) $4,385,  $1,512, $1,280 and $836 of
     life  insurance  premiums paid by the Company for the benefit of Dr. Wigdor
     and  Messrs.  Compofelice,  Garten  and  Newkirk,  respectively,  and  (ii)
     $122,500,  $85,000,  $31,250, $43,750 and $18,350 accrued by the Company in
     unfunded  accounts  for the  benefit  of Dr.  Wigdor  and  Messrs.  Martin,
     Compofelice, Garten and Newkirk, respectively,  under the NL's Supplemental
     Executive Retirement Plan ("SERP"). For 1995 represents: (i) a contribution
     by the  Company  of $9,000 to the  account  of each of the named  executive
     officers under the Savings Plan,  (ii) $3,914,  $1,512,  $1,121 and $760 of
     life  insurance  premiums paid by the Company for the benefit of Dr. Wigdor
     and  Messrs.  Compofelice,  Garten  and  Newkirk,  respectively,  and (iii)
     $107,500,  $85,000,  $28,530, $33,750 and $12,300 accrued by the Company in
     unfunded  accounts  for the  benefit  of Dr.  Wigdor  and  Messrs.  Martin,
     Compofelice, Garten and Newkirk, respectively, under the SERP.


<PAGE>

Stock Option Grants

      The following  table provides  information  with respect to the individual
stock option grants to the executive officers named in the Summary  Compensation
Table set forth above under the Incentive  Plan (as defined above) during fiscal
year 1997.


<TABLE>
<CAPTION>
                                              OPTION GRANTS IN LAST FISCAL YEAR
                                                                                                          Potential Realizable Value
                                                                                                           at Assumed Rates of Stock
                                                       Percent of Total     Exercise or                         Appreciation for
                          Number of Securities         Options Granted          Base                             Option Term (3) 
      Name                Underlying Options           to Employees in        Price(2)      Expiration    --------------------------
      ----                  Granted  (#)(1)               Fiscal Year       ($/Share)         Date   
                          --------------------         ----------------     -----------     ----------   
                                                                                                            5% ($)           10% ($)
                                                                                                            ------           -------
<S>                              <C>                          <C>             <C>            <C>            <C>              <C>
J. Landis Martin                 30,000                       20.5%           11.875         2/12/07        224,042          567,769
                                 30,000                                       13.375                        179,042          522,769
                                 30,000                                       14.875                        134,042          477,769

Lawrence A. Wigdor               25,000                       17.1%           11.875         2/12/07        186,702          473,141
                                 25,000                                       13.375                        149,202          435,641
                                 25,000                                       14.875                        111,702          398,141

Joseph S. Compofelice            12,000                        8.2%           11.875         2/12/07         89,616          227,107
                                 12,000                                       13.375                         71,616          209,107
                                 12,000                                       14.875                         53,616          191,107

David B. Garten                  15,000                       10.2%           11.875         2/12/07        112,021          283,884
                                 15,000                                       13.375                         89,521          261,384
                                 15,000                                       14.875                         67,021          238,884

Dennis G. Newkirk                10,000                        6.8%           11.875         2/12/07         74,680          189,256
                                 10,000                                       13.375                         59,680          174,256
                                 10,000                                       14.875                         44,680          159,256

</TABLE>

(1)  Grants of options to purchase  shares of Common  Stock under the  Incentive
     Plan vest over five years from February 12, 1997,  the date of grant,  at a
     rate of 40% on the second anniversary of the date of grant, and 20% on each
     of the next three succeeding  anniversary  dates. The options expire on the
     tenth anniversary date of the date of grant.

(2)  Exercise  price of  $11.875 is equal to the mean of the high and low prices
     of the Common Stock on the New York Stock  Exchange  Composite  Tape on the
     date of grant;  exercise  prices of $13.375  and  $14.875  are equal to the
     foregoing   mean  price  on  the  date  of  grant  plus  $1.50  and  $3.00,
     respectively.

(3)  Pursuant  to the  rules  of  the  Commission,  these  amounts  reflect  the
     calculations at assumed 5% and 10% appreciation  rates.  Such  calculations
     are not  intended  to  forecast  future  appreciation,  if any,  and do not
     necessarily  reflect the actual value,  if any,  that may be realized.  The
     actual  value of such  options,  if any,  would be  realized  only upon the
     exercise of such  options and depends  upon the future  performance  of the
     Common Stock. No assurance can be made that the amounts  reflected in these
     columns will be achieved.  The potential  realizable  value was computed as
     the difference  between the  appreciated  value (at the end of the ten-year
     term of the options) of the Common Stock into which the listed  options are
     exercisable  and  the  aggregate  exercise  price  of  such  options.   The
     appreciated value per share at the end of the ten-year term would be $19.34
     and $30.80 at the assumed 5% and 10% rates, respectively.


<PAGE>

Stock Option Exercises and Holdings

     The  following  table  provides  information  with respect to the executive
officers named in the Summary Compensation Table, as set forth above, concerning
the exercise of options during the last fiscal year and the value of unexercised
options held as of December 31, 1997.  Three such executive  officers  exercised
options during 1997 as shown in the table below.  No stock  appreciation  rights
have been granted under the Incentive Plan.

<TABLE>
<CAPTION>

                        AGGREGATED OPTION EXERCISES IN 1997 AND 12/31/97 OPTION VALUES

                                                                     Number of Securities
                                                                     Underlying Unexercised        Value of Unexercised In-the-
                         Shares Acquired on                           Options at 12/31/97(#)         Money Options at 12/31/97
       Name                 Exercise (#)      Value Realized ($)     Exercisable/Unexercisable     ($) Exercisable/Unexercisable
       ----                 ------------      ------------------     -------------------------     -----------------------------

<S>                           <C>                  <C>                   <C>                             <C>
J. Landis Martin              76,000               722,629               752,277/237,000                 2,005,500/560,250
Lawrence A. Wigdor            20,000               170,000               361,998/169,002                   997,868/351,507
Joseph S. Compofelice         12,000                84,376                75,000/128,000                   324,000/289,000
David B. Garten                -0-                   -0-                 178,000/84,000                    498,500/173,060
Dennis G. Newkirk              -0-                   -0-                 128,000/66,000                    511,625/162,436

</TABLE>

Pension Plan

      The  Retirement  Plan of NL Industries,  Inc. for its U.S.  employees (the
"Pension Plan") provides lifetime retirement benefits to eligible employees.  In
February 1996, the Company  approved the suspension of all future accruals under
the salaried  component of the Pension Plan  effective as of March 31, 1996 (the
"Suspension Date").  Salaried employees who were at least 21 years of age became
eligible to  participate  in the Pension  Plan if they  completed  at least five
months of service (as defined in the Pension  Plan) in a specified  twelve-month
period prior to the Suspension Date. Annually, prior to the Suspension Date, the
Board established, in its discretion, the amount of an employee's annual pension
benefit for the year based primarily on the employee's  total eligible  earnings
for that year and the Company's  financial  performance in  relationship  to its
annual  operating  plan for the previous  year.  To the extent that the minimum,
target,  or maximum level of operating  income  performance  were achieved,  the
employee earned an annual benefit equal to 1%, 2% or 3%,  respectively,  of such
employee's  total  base  salary  and  bonus,  up to the  limits set forth in the
Internal  Revenue  Code.  See  "Compensation  Committee's  Report  on  Executive
Compensation  - Variable  Compensation  Plan" below.  Such pension  benefits are
payable upon  retirement  and  attainment of ages specified in the Pension Plan.

<PAGE>

The Pension Plan covers each executive officer named in the Summary Compensation
Table set forth above.  No amounts were paid or  distributed to any of the named
executive  officers in 1997. The estimated  accrued annual benefits payable upon
retirement  at  normal  retirement  age  for  Dr.  Wigdor  and  Messrs.  Martin,
Compofelice,  Garten and  Newkirk  are  $29,438,  $50,239,  $9,293,  $26,405 and
$29,084, respectively.


Employment Agreements

      Mr.  Martin has entered into an  executive  severance  agreement  with the
Company  which  provides  that he may be terminated at any time by action of the
Board of  Directors.  The Company  and Mr.  Martin  have  amended the  executive
severance agreement originally entered into in December 1991 to provide that the
following  payments  shall be made to Mr.  Martin  in the  event  Mr.  Martin is
terminated  by the Company  without  cause (as defined in the  agreement) or Mr.
Martin terminates his employment with the Company for good reason (as defined in
the agreement):  (i) two times Mr. Martin's annual base salary plus target bonus
(which  shall not be less than the amount of his annual  salary);  (ii)  accrued
salary and bonus through the date of  termination;  and certain other  benefits.
The amended  agreement  provides that it shall be in effect through December 31,
2000.

      In connection with the commencement of Mr.  Compofelice's  employment with
the Company in February 1994, the MDC Committee (as defined below)  approved the
terms of an executive  severance agreement with Mr. Compofelice which have since
been incorporated into an executive  severance agreement which provides that Mr.
Compofelice  may be  terminated at any time by action of the Board of Directors.
The executive  severance  agreement  also  provides that the following  payments
shall be made to Mr.  Compofelice in the event Mr.  Compofelice is terminated by
the Company  without  cause (as  defined in the  agreement)  or Mr.  Compofelice
terminates  his  employment  with the Company for good reason (as defined in the
agreement):  (i) the greater of two times Mr.  Compofelice's  annual base salary
plus target bonus (which shall not be less than the amount of his annual salary)
or Mr.  Compofelice's  actual  salary  and  bonus  for the two  years  prior  to
termination;  (ii)  accrued  salary and bonus  through the date of  termination;
(iii) an  amount  in cash or  Common  Stock  equal to the fair  market  value of
outstanding  stock options granted to Mr.  Compofelice in excess of the exercise
price and unvested  restricted  stock  grants;  (iv) an amount equal to unvested
Company  contributions  together with an amount equal to the Company's  matching
contributions to Mr.  Compofelice's  account under the Savings Plan for a period
of two years;  (v) an amount  equal to the vested and  unvested  portions of Mr.
Compofelice's  account  under the SERP;  and (vi) certain other  benefits.  This
agreement is automatically  extended for a one-year term commencing each January
1,  unless the Company  and Mr.  Compofelice  agree  otherwise  in writing.  Mr.
Compofelice left the employment of the Company in February 1998; no amounts were
paid or are due under the agreement.

       Dr. Wigdor and the Company entered into an executive  severance agreement
in March 1995 on terms  substantially  similar to those in the agreement between
the Company and Mr. Compofelice described above.




<PAGE>

            COMPENSATION COMMITTEE'S REPORT ON EXECUTIVE COMPENSATION


      The Company's Management  Development and Compensation Committee (the "MDC
Committee")  consists of individuals  who are neither  officers nor employees of
the Company or its  subsidiaries  and who are not eligible to participate in any
of the employee benefit plans administered by such committees.

      The MDC Committee reviews and recommends  executive  officer  compensation
policies and  practices.  The MDC  Committee was  responsible  for reviewing and
approving  all   compensation   actions  during  1997,   including   stock-based
compensation, involving the Company's executive officers. However, any action in
connection  with the  Chief  Executive  Officer's  (the  "CEO")  base  salary is
reviewed and approved by the Board after  recommendation  by the MDC  Committee.
See "Meetings and Committees."

      The Company's  compensation system with respect to its executive officers,
including the CEO,  consists of three primary  components:  base salary,  annual
variable  compensation pursuant to the Variable Compensation Plan, and the grant
of stock options,  restricted stock and/or stock appreciation rights pursuant to
the Incentive  Plan.  Through the use of the foregoing,  the Committee  seeks to
achieve a balanced  compensation  package  that will  attract  and  retain  high
quality key  executives,  appropriately  reflect each such  executive  officer's
individual  performance,  contributions,  and general market value,  and provide
further incentives to such officers to maximize annual operating performance and
long-term shareholder value.

Base Salaries

      The MDC Committee reviews any recommendations of the CEO regarding changes
in base salaries for executive officers. Such recommendations are made after the
CEO's consultation with the Chairman of the Board.  Reviews regarding changes in
the base salaries of executive  officers occur no more frequently than annually.
When  recommendations  regarding  changes in base salary  levels are made by the
CEO, the MDC Committee may take such actions, including any modifications, as it
deems appropriate.  The CEO's recommendations and the MDC Committee's actions in
1997 were based  primarily  on a  subjective  evaluation  of past and  potential
future individual  performance and  contributions and alternative  opportunities
that might be available to the  executives in question.  The Committee  also had
available  to it  compensation  data  from  companies  employing  executives  in
positions  similar to those whose salaries were being reviewed as well as market
conditions  for  executives  in general  with  similar  skills,  background  and
performance  levels,  both inside and outside of the  chemicals  industry  (such
companies may include companies contained in the peer group index plotted on the
Performance  Graph  following  this report),  and other  companies  with similar
financial and business characteristics as the Company, or where the executive in
question has similar  responsibilities.  In 1997,  the MDC Committee  approved a
base annual salary  increase for Mr.  Compofelice  from $185,000 to $260,000 and
for Mr. Martin from $400,000 to $500,000. In addition,  the Committee determined
that Ms.  Alderton  should  receive a base salary with respect to 1996 on a full
time basis.  No action was taken with respect to the base salaries of any of the
other executive officers of the Company.

Variable Compensation Plan

      Awards  under the Variable  Compensation  Plan  constitute  a  significant
portion of an executive's  potential  annual cash  compensation  (between 0% and
150% of base  salary for the CEO and  certain  executive  officers).  Awards are
based  primarily  on  the  Company's  main  business  segment  achieving  annual
predetermined operating income goals and secondarily, with respect to certain of
the executive  officers,  on individual  performance.  The Company's  management
makes  recommendations  to the Board regarding the operating income plan for the
year after reviewing market conditions and the Company's operations, competitive
position,  marketing  opportunities,  and strategies  for  maximizing  financial
performance.  The Board approves this recommendation with modifications it deems
appropriate. Based on the business plan for the year, the MDC Committee sets the

<PAGE>

Company's  and its  business  segments'  operating  income goals at three levels
which are designed to help focus the Company's  executives on achieving superior
annual  operating  results in light of existing  conditions:  a threshold level,
which is the minimum  operating  income level for any award to be made under the
Variable  Compensation Plan (the "Minimum  Level"),  a target level (the "Target
Level"),  and a maximum level (the "Maximum Level").  The Variable  Compensation
Plan,  in  combination  with base  salary,  is designed  to result in  executive
officers and other  eligible  participants  receiving  annual cash  compensation
below competitive compensation levels if the Minimum Level is not achieved.

      Pursuant to the Variable  Compensation  Plan, if operating income is below
the Minimum  Level,  no variable  compensation  is paid. If the Minimum Level is
met, executive officers are eligible to receive variable  compensation  payments
that in 1997  ranged  between  14% and  60% of  base  salary,  depending  on the
executive.  If the Target Level is reached,  the range of variable  compensation
payments  is higher,  and in 1997 ranged  between  22% and 100% of base  salary,
depending  on the  executive.  If the  Maximum  Level is  reached  or  exceeded,
executives are eligible to receive the highest variable  compensation  payments,
and in 1997 the range of payments for which executives were eligible was between
35%  and  150%  of  base  salary,  depending  on the  executive.  In view of the
achievement of operating income during 1996 below the Minimum Level, in 1997 the
MDC Committee  approved no payments under the Variable  Compensation Plan to the
executive officers, including the CEO. Such awards to the CEO and the four other
highest  paid  executive  officers  under  the  Variable  Compensation  Plan are
reported in the bonus column in the Summary Compensation Table set forth above.

      Apart from the Variable  Compensation  Plan,  the MDC  Committee may award
other bonuses as the  Committee  deems  appropriate  from time to time under its
general  authority or under a separate  discretionary  plan. No such awards were
made as to executive officers in 1997. In addition,  target levels for operating
income  performance  were  utilized  by the  MDC  Committee  and the  Board,  as
applicable,  for determining the contributions by the Company to the accounts of
eligible participants,  including the CEO and the executive officers,  under the
Savings Plan, the Pension Plan, and the SERP. See "Pension Plan" above.

Stock-Based Compensation

      The  Incentive  Plan  further  supports the goal of  maximizing  long-term
shareholder value by providing for stock-based compensation,  the value of which
is directly related to increases in shareholder  value.  Stock option grants, in
particular,  are  considered  a  significant  element  of  the  Company's  total
compensation  package  for  the  CEO and the  other  executive  officers  of the
Company.  The  Committee  believes  that  compensation  linked  to  stock  price
performance  helps focus the executives'  attention on management of the Company
from the shareholders' perspective.

      Option grants are intended to provide  incentives to increase  shareholder
value in the future and to reward past  performance by the  executive.  In 1997,
the MDC Committee reviewed recommendations by the CEO regarding option grants to
executive  officers  other  than the CEO.  Options  were  granted  to  executive
officers,  including  the  CEO,  in the MDC  Committee's  discretion  based on a
subjective    evaluation    regarding   each    executive's    performance   and
responsibilities.  In 1997,  the MDC  Committee  included  in its  determination
regarding  the  number of  options  to be  granted  to each  executive  officer,
including  the CEO,  the  amount  and  terms  of  options  already  held by such
officers.  Grants made in 1997 are reported in the Option  Grants in Last Fiscal
Year Table set forth above.

      To help assure a focus on long-term creation of shareholder value, the MDC
Committee  granted ten year  options,  which vest 40%,  60%, 80% and 100% on the
second,  third,  fourth  and  fifth  anniversary  dates  of the  date of  grant,
respectively.  In 1997 the MDC Committee granted options in three exercise price
tranches.  One-third of such options granted in 1997 are exercisable at the fair
market value of the Common Stock on the date of grant. The remaining  two-thirds
of the options are  exercisable at levels that are above the market price on the
date of grant.  See the Summary  Compensation  Table above.  Although  permitted
under the  Incentive  Plan,  the MDC Committee in 1997 did not make or recommend
any grants of restricted stock, stock appreciation  rights or other equity-based
awards.


<PAGE>

     To encourage growth in shareholder  value, the MDC Committee  believes that
executives  who are in a  position  to make a  substantial  contribution  to the
long-term  success of the Company should have a significant stake in its ongoing
success.  In 1993, the MDC Committee  established goals for minimum Common Stock
ownership for executive  officers to encourage  executives to build their Common
Stock ownership. Executives are encouraged to achieve these ownership goals over
the coming year. The MDC Committee intends to take into  consideration in making
future grants of stock options after 1998, among other things, whether or not an
executive  has achieved his or her  ownership  goals.  The table below shows the
goals for the Company's  executive  officers at year-end 1997 for minimum Common
Stock  ownership  and  year-end  market  value  of the  actual  share  ownership
(excluding unexercised options) as a multiple of 1997 base salary.


                                               Year-End Market Value of Share
                                          Ownership as a Multiple of Base Salary

                                                        Actual           Goal
President and Chief Executive Officer                    4.3X             4X
Executive Vice President                                 2.2X             3X
Vice Presidents:  Chief Financial Officer                2.6X             3X
                  Controller                             3.3X             2X
                  General Counsel                        2.5X             2X
                  Treasurer                              3.2X             2X


Tax Code Limitation on Executive Compensation Deductions

      In 1993, Congress amended the Internal Revenue Code to impose a $1 million
deduction limit on  compensation  paid to the CEO and the four other most highly
compensated   executive  officers  of  public  companies,   subject  to  certain
transition   rules  and  exceptions  for  compensation   received   pursuant  to
non-discretionary   performance-based   plans   approved   by   such   company's
shareholders.  In  1996,  the  Board  and the  Company's  shareholders  approved
amendments to the Company's Variable  Compensation Plan and Incentive Plan which
permit compensation paid or awards or grants made to executives pursuant to such
plans to continue to qualify for deductibility by the Company.

      The foregoing  report on executive  compensation has been furnished by the
Company's MDC Committee of the Board of Directors.

                        Mr. Kenneth R. Peak (Chairman)
                        Admiral Elmo R. Zumwalt, Jr.





<PAGE>



                                PERFORMANCE GRAPH


      Set  forth  below is a line  graph  comparing  the  yearly  change  in the
cumulative total  shareholder  return on the Common Stock against the cumulative
total  return of the S & P  Composite  500 Stock  Index and the S & P  Chemicals
Index for the period commencing  December 31, 1992 and ending December 31, 1997.
The graph  shows the value at  December  31 of each year  assuming  an  original
investment  of $100 and  reinvestment  of dividends and other  distributions  to
shareholders.

[GRAPHIC OMITTED - GRAPH  DESCRIPTION] a line graph plotting the points shown in
the chart below which  compares the yearly  percentage  change in the cumulative
total shareholder return on the Common Stock against the cumulative total return
of the S & P Composite  500 Stock Index and S & P Chemical  Index for the period
commencing December 31, 1992 and ending December 31, 1997.


<TABLE>
<CAPTION>

                         1992      1993     1994      1995      1996       1997
                         ----      ----     ----      ----      ----       ----
<S>                      <C>       <C>      <C>       <C>       <C>        <C>
NL Industries, Inc.      $100       $97     $273      $262      $241       $302
S & P 500                $100      $110     $112      $153      $189       $252
S & P Chemicals Index    $100      $112     $129      $169      $223       $275
</TABLE>




<PAGE>



                       PROPOSAL TO APPROVE ADOPTION OF THE
                 NL INDUSTRIES, INC. 1998 LONG-TERM INCENTIVE PLAN

      The Board of Directors seeks the approval by the Company's shareholders of
the NL Industries, Inc. 1998 Long-Term Incentive Plan (the "Plan"). The Board of
Directors adopted the Plan in March 1998, subject to shareholder  approval.  The
text of the Plan is attached as Appendix A. The  description of the Plan in this
proxy  statement is qualified in its entirety by reference to the complete  text
of the Plan in Appendix A.

Description of the Plan

General

      Purpose. The purpose of the Plan is to advance the interests of NL and its
shareholders by providing  incentives to certain eligible persons who contribute
significantly to the strategic and long-term  performance  objectives and growth
of NL.

      Types of Awards.  The Plan provides for awards or grants of stock options,
stock  appreciation  rights ("SARs"),  restricted stock,  performance grants and
other awards deemed by the MDC  Committee to be consistent  with the purposes of
the Plan (collectively, "Awards").

      Eligible Persons. Key individuals employed by, or performing services for,
NL are eligible to receive Awards.  A person who is eligible to receive an Award
may be a nonemployee director or some other person who is not employed by NL.

      Administration.   Generally,   a  committee  of  the  Board  of  Directors
consisting of two or more  individuals  administers the Plan (the  "Committee").
The Plan provides that the MDC Committee is the initial  committee to administer
the Plan.  In certain other  instances,  the Board of Directors or other persons
may  administer the Plan. The Plan requires that the membership of the Committee
consist of "nonemployee  directors" as defined in Rule 16b-3  promulgated by the
Commission  under the  Exchange  Act and "outside  directors"  as defined  under
regulations  promulgated  by the  Department of Treasury under Section 162(m) of
the Internal  Revenue Code.  Eligible persons entitled to receive Awards include
members of the Committee.

      The Committee determines the eligible persons to whom it grants Awards and
the type, size and terms of such Awards.  The Committee may also amend the terms
of any Award if the Committee  could grant such amended Award under the terms of
the Plan at the time of such amendment.  In addition, the Committee can construe
and  interpret the Plan and any Award and make all other  determinations  deemed
necessary or advisable for the administration of the Plan.

      Number of Shares  Subject  to the Plan.  The Plan  reserves  a maximum  of
5,000,000 shares of NL Common Stock for Awards,  subject to certain adjustments.
NL  Common  Stock  issued  under  the Plan may be either  newly  issued  shares,
treasury  shares,  reacquired  shares or any  combination  of the three.  If any
shares  of NL  Common  Stock  issued  as  restricted  stock  under  the Plan are
reacquired by the Company pursuant to such rights,  or if any Award is canceled,
terminates or expires unexercised, the NL Common Stock that would otherwise have
been issuable  pursuant to such Award will be available  for issuance  under new
Awards.

      Annual Limit on Awards to an Individual.  Subject to certain  adjustments,
no  Eligible  Person may receive  Awards for more than one million  shares of NL
Common Stock in any one fiscal year.

<PAGE>

      Limitations on Transfers of Awards. Generally, an Award is nontransferable
except  by  approval  of the  Committee  or by will or the laws of  descent  and
distribution. Incentive Stock Options, however, are transferable only by will or
the laws of descent and distribution.

Description of Awards under the Plan

      Stock Options.  An Award of a Stock Option (a "Stock Option") is the right
to  purchase  a  specified  number of shares of NL Common  Stock at a  specified
exercise price, both of which the Committee determines. The Committee can choose
whether  on not the grant of a Stock  Option  requires  the  recipient  to pay a
purchase price at the time of grant.  The Committee also determines when and how
a Stock Option becomes exercisable.  The term of a Stock Option, however, cannot
exceed ten years.  A Stock Option may be either a  Nonqualified  or an Incentive
Stock Option.

      The Committee may grant  Nonqualified Stock Options to any eligible person
under the Plan. The exercise price for Nonqualified  Stock Options may be at any
price the Committee determines.

      The Committee may only grant  Incentive  Stock Options to employees of NL.
The exercise  price of an  Incentive  Stock Option may not be less than the fair
market value of the  underlying  shares of NL Common Stock on the date of grant.
The maximum aggregate fair market value of NL Common Stock (determined as of the
respective  dates of grant) with respect to which  Incentive  Stock  Options are
first  exercisable  by any one employee of NL in any calendar year cannot exceed
$100,000.  If the Committee  grants an Incentive Stock Option to an employee who
owns more than 10% of the voting  power of all classes of the stock of NL or any
parent or subsidiary of NL, the option cannot have an exercise  price lower than
110% of fair  market  value on the date of the grant or a term  longer than five
years.  In addition,  the recipient of an Incentive Stock Option cannot exercise
the option  beyond the time the Code allows for the  favorable  tax treatment of
Incentive Stock Options.

      Payment of the exercise  price of a Stock Option must be made in such form
as the Committee  determines in its discretion.  If the Committee allows payment
to be made with shares of NL Common Stock,  such shares are valued at their fair
market  value on the day of  exercise  and shall  have  been held by the  option
holder for a period of at least six months.

      The Committee may grant Stock Options in conjunction with any other Award,
except that Incentive  Stock Options  cannot have an associated  Award that is a
Nonqualified  Stock  Option.  When  the  Committee  awards  a  Stock  Option  in
conjunction with an associated  Award, the number of NL Common Shares subject to
the Stock Option may be reduced on an  appropriate  basis to the extent that the
associated Award is exercised,  paid to or otherwise  received by the recipient,
as determined by the Committee.

      Stock Appreciation  Rights. SARs are rights to receive (without payment to
the Company)  cash, NL Common Stock,  other  property or any  combination of the
three based on the increase in the value of the NL Common Stock specified in the
SAR. A SAR that is related to another  Award is  exercisable  only to the extent
that the other Award is exercisable  and then only during such period or periods
as the Committee determines.  In addition, a SAR that is associated with a Stock
Option is  exercisable  only when the fair market  value of a share of NL Common
Stock exceeds the exercise price per share of the associated Stock Option.  If a
SAR's associated Award is an Incentive Stock Option,  the exercise of the SAR is
limited  to  those  instances  where  its  exercise  would  not  disqualify  the
associated  Stock Option's  status as an Incentive  Stock Option under the Code.
When the Committee  awards a SAR in conjunction  with an associated  Award,  the
number of NL Common Shares  subject to the SAR may be reduced on an  appropriate
basis to the extent that the associated Award is exercised, paid to or otherwise
received by the recipient, as determined by the Committee.


<PAGE>

      Upon the  exercise of a SAR, the holder  receives,  at the election of the
Committee,  cash,  shares  of  NL  Common  Stock,  other  consideration  or  any
combination  of the  three  equal  in  value  to (or  in the  discretion  of the
Committee,  less than) the excess of the fair  market  value of the shares of NL
Common Stock subject to such exercise over the exercise price for such shares as
specified in the SAR.

      Restricted  Stock. An Award of restricted stock is an award of a number of
shares of NL Common Stock that are subject to certain  restrictions  (e.g., such
stock shall be issued but not delivered to the recipient and,  generally,  shall
be forfeited if the  recipient's  employment or  performance  of services for NL
terminates).  Such  restrictions  exist for a certain  restricted  period and in
accordance with such terms as the Committee  specifies.  Prior to the expiration
of the  restricted  period  and the  satisfaction  of any  applicable  terms,  a
recipient  who has  received  an Award of  restricted  stock  has the  rights of
ownership of the shares of NL Common Stock subject to such award,  including the
right to vote and to receive dividends.

      Performance  Grants.  At the time an Award of a performance grant is made,
the  Committee  establishes  performance  objectives  during a  specified  award
period.  The final value,  if any, of a  performance  grant is determined by the
degree to which the  performance  objectives have been achieved during the award
period,  subject to adjustments that the Committee may approve based on relevant
factors.  Performance  objectives  may  be  based  on  the  performance  of  the
recipient, NL, one or more of its subsidiaries or one or more of their divisions
or units,  or any  combination  of thereof,  as the  Committee  determines.  The
Committee may, in its  discretion,  make  adjustments in the  computation of any
performance  measure.  The maximum value of an Award of a  performance  grant as
established  by the Committee may be a fixed amount,  an amount that varies from
time to time  based on the value of the NL Common  Stock,  or an amount  that is
determinable from other criteria the Committee specifies. Performance grants may
have different classes or series, having different names, terms and conditions.

      The Committee may grant Awards of performance  grants in conjunction  with
other Awards.  If awarded in conjunction with an associated Award, the number of
performance grants may be reduced on an appropriate basis to the extent that the
associated  Award is  exercised  by,  paid to, or  otherwise  received  by,  the
recipient, as determined by the Committee.

      The  Committee  will  generally  determine  the  value  of an  Award  of a
performance  grant as promptly as practicable  after the end of the award period
or upon the earlier termination of the recipient's  employment or performance of
services.  The Committee may,  however,  determine the value of the  performance
grant and pay it out at any time  during the award  period.  If the  performance
grant does not have an associated  Award,  the holder of the  performance  grant
will be paid the  final  value.  If the  performance  grant has value and has an
associated  Award,  however,  the Committee will determine whether to cancel the
performance  grant and permit the recipient to retain the associated  Award,  to
cancel the associated Award and pay out the value of the performance grant or to
pay out the value of only a portion of the  performance  grant and to cancel the
associated Award as to an appropriate portion thereof.

      Payment.  Payment of an Award such as a  performance  grant may be made in
cash, shares of NL Common Stock or other  consideration  (for example,  other NL
securities or property) or a combination  of the three,  and in accordance  with
terms the Committee  sets.  The Committee may also permit any payments  under an
Award to be  deferred  until a later  date  upon  such  terms  as the  Committee
provides.

Additional Information

      Adjustments in Shares of NL Common Stock. Under the Plan, if any change in
the outstanding  shares of NL Common Stock occurs by reason of an  extraordinary
or unusual event (e.g. stock split, stock dividend, recapitalization or merger),


<PAGE>

the  Committee may direct  appropriate  changes in the terms of any Award or the
number of shares of NL Common  Stock  available  for  Awards.  Such  changes may
include the number or kind of  securities  that may be subject to, the  exercise
price  under,  any  measure of  performance  for,  or the number or value of, an
Award.

      Amendments to Awards.  The  Committee may amend or modify any  outstanding
Award in any manner (including,  but not limited to, acceleration of the date of
exercise  of or  payments  under any Award) if the  Committee  could  grant such
amended  or  modified  Award  under  the  terms  of the Plan at the time of such
amendment  or  modification.  Only in certain  circumstances,  however,  may the
Committee  amend or  modify  an  outstanding  Award in a  material  manner  that
adversely  affects the holder of the affected Award without the holder's written
consent.

      Substitution  of Awards.  The  Committee  may permit  holders of Awards to
surrender  outstanding  Awards in order to exercise or realize the rights  under
other Awards. In addition,  the Committee may allow or require holders of Awards
to exchange such outstanding Awards for the grant of new Awards.

      Significant  Corporate Events. In the event of the proposed dissolution or
liquidation of NL, all outstanding  Awards  terminate  immediately  prior to the
consummation  of  such  proposed  action,   unless  otherwise  provided  by  the
Committee.  In the event of a proposed sale of all or  substantially  all of the
assets  of NL or  the  merger  of NL  with  or  into  another  corporation,  all
restrictions  on any  outstanding  Awards lapse and  recipients of Awards become
entitled to the full  benefit of their Awards  immediately  prior to the closing
date of such sale or merger, unless otherwise provided by the Committee.

      Rights to Continue as Employee or Service  Provider.  Neither the Plan nor
any Award confers on any  individual  any right to continue in the employ of, or
provide services to, NL.

      Effectiveness  of Rights as  Shareholders.  A recipient of an Award has no
rights as a shareholder  with respect to the shares of NL Common Stock  issuable
pursuant to the Award until the date of  issuance of the stock  certificate  for
such shares.

      Financing.  If the Committee deems it advisable,  NL may assist recipients
of Awards with financing from NL or a third party so as to permit the payment of
taxes with respect to an Award or to enable the  recipient to acquire,  exercise
or realize  the  rights of an Award.  Such  assistance  may take any form as the
Committee considers appropriate.

      Deferrals.  The  Committee  may  grant an Award  in  conjunction  with the
deferral of a recipient's compensation.  The Committee may provide that any such
deferred  compensation be forfeited to the Company under certain  circumstances,
subject to an increase or  decrease  in value based upon  specified  performance
measures or credited with income  equivalents until the date or dates of payment
of the Award.

      Alternative  Payments  for Tax  Withholding.  The  Committee  may permit a
recipient of an Award to elect to pay taxes required to be withheld with respect
to an Award in any appropriate manner  (including,  without  limitation,  by the
surrender  to the  Company of shares of NL Common  Stock owned by such person or
that would otherwise be distributed,  or have been distributed,  as the case may
be, pursuant to such Award).

      Termination.  The Plan terminates on the earlier of the tenth  anniversary
of the date the Plan is approved by the Company's  shareholders  or such time as
the Board of Directors  adopts a resolution  terminating  the Plan. The Board of
Directors may extended the Plan for up to an additional five years for the grant
of Awards other than Incentive Stock Options.


<PAGE>

      Amendments  to the Plan.  The Board of Directors may amend the Plan at any
time. Except in certain circumstances,  no amendment shall adversely affect in a
material manner any right of any recipient of an Award without such  recipient's
written consent.

      Registration  of NL Common  Stock under the Plan.  The Company  intends to
register  the  issuance of the shares of NL Common Stock under the Plan with the
Commission.

Federal Income Tax Consequences

      The following is a summary of the  principal  current  federal  income tax
consequences  of  transactions  under the Plan. It does not describe all federal
tax  consequences  under the Plan, nor does it describe state,  local or foreign
tax consequences.

      Incentive  Stock  Options.  No taxable income is realized by the recipient
upon the grant or exercise of an Incentive Stock Option.  However,  the exercise
of an Incentive Stock Option may result in alternative minimum tax liability for
the recipient. If no disposition of shares issued to a recipient pursuant to the
exercise of an Incentive Stock Option is made by the recipient  within two years
from the date of grant or within one year after the  transfer  of such shares to
the recipient,  then upon sale of such shares,  any amount realized in excess of
the exercise  price will be taxed to the  recipient as a short-term or long-term
capital gain or loss,  depending  on how long the shares have been held,  and no
deduction will be allowed to the Company for federal income tax purposes.

      If the  shares  of NL  Common  Stock  acquired  upon  the  exercise  of an
Incentive  Stock Option are disposed of prior to the  expiration of the two-year
and one-year  holding  periods  described  above,  generally the recipient  will
realize  ordinary  income in the year of  disposition  in an amount equal to the
excess (if any) of the fair market value of the shares at exercise (or, if less,
the amount  realized on an  arms'-length  sale of such shares) over the exercise
price, and the Company will be entitled to deduct such amount.  Any further gain
realized  will be taxed as  short-term  or  long-term  capital gain and will not
result in any  deduction by the Company.  Special rules may apply where all or a
portion of the exercise price of the Incentive Stock Option is paid by tendering
shares of NL Common Stock.

      If an  Incentive  Stock  Option is  exercised  at a time when it no longer
qualifies  for the tax  treatment  described  above,  the option is treated as a
Nonqualified  Stock  Option.  Generally,  an Incentive  Stock Option will not be
eligible for the tax  treatment  described  above if it is  exercised  more than
three months following termination of employment (one year following termination
of employment by reason of permanent  and total  disability),  except in certain
cases  where  the  Incentive  Stock  Option  is  exercised  after the death of a
recipient.

      Nonqualified  Stock Options.  With respect to  Nonqualified  Stock Options
granted  under the Plan,  no income is realized by the recipient at the time the
options are granted.  Generally, at exercise, ordinary income is realized by the
recipient in an amount equal to the  difference  between the exercise  price and
the fair  market  value of the shares on the date of  exercise,  and the Company
receives a tax deduction for the same amount,  and at disposition,  appreciation
or  depreciation  after the date of exercise is treated as either  short-term or
long-term capital gain or loss, depending on how long the shares have been held.

      SARs. The grant of a SAR does not result in income for the grantee or in a
deduction  for the Company.  Upon the  exercise of a SAR, the grantee  generally
recognizes  ordinary  income and the Company is entitled to a deduction equal to
the positive  difference between the fair market values of the shares subject to
the SAR on the date of grant and the date of exercise.


<PAGE>

      Restricted  Stock.  A recipient  of  restricted  stock  generally  will be
subject to tax at ordinary income rates on the fair market value of the stock at
the time the stock is either transferable or is no longer subject to forfeiture,
less any amount paid for such stock.  The Company is entitled to a corresponding
tax deduction  for the amount of ordinary  income  recognized by the  recipient.
However,  a recipient  who so elects under  Section  83(b) of the Code within 30
days of the date of  issuance  of the  restricted  stock will  realize  ordinary
income on the date of issuance  equal to the fair market  value of the shares of
restricted  stock at that time (measured as if the shares were  unrestricted and
could be sold  immediately),  less any amount paid for such stock. If the shares
subject to such election are  forfeited,  the recipient  will not be entitled to
any  deduction,  refund or loss for tax  purposes  with  respect to the ordinary
income previously  recognized.  Upon the sale of the shares after the forfeiture
period has expired,  the  appreciation or  depreciation  since the shares became
transferable  or free from risk of forfeiture  (or, if a Section 83(b)  election
was made, since the shares were issued,  taking into account the ordinary income
previously  recognized) will be treated as long-term or short-term  capital gain
or loss. The holding period to determine  whether the recipient has long-term or
short-term  capital gain or loss begins when the restriction  period expires (or
upon the earlier  issuance of the shares,  if the  recipient  elected  immediate
recognition of income under Section 83(b)).

      Performance Awards. The recipient of a performance award will generally be
subject to tax at ordinary income rates on any cash received and the fair market
value of any NL Common  Stock  issued  under the  award,  and the  Company  will
generally  be  entitled to a  deduction  equal to the amount of ordinary  income
realized by the recipient.  Any cash received under a performance  award will be
included  in  income at the time of  receipt.  The fair  market  value of any NL
Common  Stock  received  will  also  generally  be  included  in  income  (and a
corresponding  deduction will generally be available to the Company) at the time
of receipt.  The capital  gain or loss  holding  period for any NL Common  Stock
distributed under a performance  award will begin when the recipient  recognizes
ordinary income with respect to that distribution.

Plan Benefits

      Since the  Committee  grants Awards in its  discretion,  the benefits that
recipients of Awards shall receive from the Plan are presently indeterminable.

      THE BOARD OF DIRECTORS RECOMMENDS A VOTE "FOR" ADOPTION OF THE PLAN.



<PAGE>


                     CERTAIN RELATIONSHIPS AND TRANSACTIONS

Relationships with Related Parties

      As set forth under the caption  "Security  Ownership,"  Harold C. Simmons,
through  Valhi and  Tremont,  may be deemed to control NL. The Company and other
entities that may be deemed to be controlled by or affiliated  with Mr.  Simmons
sometimes  engage  in  (a)  intercorporate   transactions  such  as  guarantees,
management and expense  sharing  arrangements,  shared fee  arrangements,  joint
ventures,  partnerships,  loans, options, advances of funds on open account, and
sales,  leases and  exchanges  of assets,  including  securities  issued by both
related  and  unrelated  parties  and  (b)  common  investment  and  acquisition
strategies,   business   combinations,    reorganizations,    recapitalizations,
securities  repurchases,  and  purchases and sales (and other  acquisitions  and
dispositions)  of  subsidiaries,   divisions  or  other  business  units,  which
transactions  have involved both related and unrelated parties and have included
transactions  which  resulted  in the  acquisition  by one  related  party  of a
publicly-held equity interest in another related party. The Company from time to
time considers,  reviews and evaluates,  and understands that Contran, Valhi and
related entities consider,  review and evaluate,  such  transactions.  Depending
upon the business,  tax and other objectives then relevant,  including,  without
limitation  restrictions  under certain  indentures and other  agreements of the
Company,  it is possible  that the Company  might be a party to one or more such
transactions  in the  future.  It is the  policy  of the  Company  to  engage in
transactions  with related parties on terms,  in the opinion of the Company,  no
less favorable to the Company than could be obtained from unrelated parties.

      Harold C.  Simmons and Glenn R.  Simmons,  each a director of NL, are also
directors of Valhi and Contran. Each of the foregoing persons and Mr. Martin and
Ms. Alderton are directors of Tremont.  Mr. Martin, the Company's  President and
Chief  Executive  Officer,  and  Mr.  Compofelice,  the  Company's  former  Vice
President and Chief Financial  Officer,  served as executive officers of Tremont
and TIMET and as  directors  of Tremont  (in the case of Mr.  Martin)  and TIMET
during 1997. In addition,  Mr. Compofelice has served as an executive officer of
Valhi since 1994 and as  assistant  treasurer  of NL since  February  1998,  Mr.
Garten has served  since 1990 as assistant  secretary of Tremont,  and Mr. Hardy
has served as assistant  treasurer of Tremont and TIMET since 1997.  Mr.  Martin
expects  to  continue  to serve in 1998 as an  executive  officer  of TIMET  and
Tremont and Mr. Compofelice expects to continue to serve in 1998 as an executive
officer  of  Valhi.   Such  management   interrelationships   and  the  existing
intercorporate  relationships may lead to possible conflicts of interest.  These
possible  conflicts may arise from the duties of loyalty owed by persons  acting
as corporate fiduciaries of two or more companies under circumstances where such
companies may have adverse  interests.  Mr.  Compofelice  devoted  approximately
forty percent of his working time to NL and the remainder of his working time to
Valhi,  TIMET and Tremont.  Mr.  Martin  devotes  approximately  one-half of his
working  time to NL and the  remainder of his working time to TIMET and Tremont.
See "Certain Contractual Relationships and Transactions" below.

      Although no specific  procedures are in place that govern the treatment of
transactions among the Company,  Valhi, TIMET, Tremont and related entities, the
boards of directors of the Company, Valhi, TIMET and Tremont include one or more
members who are not officers or directors of any other entity that may be deemed
to be related to the Company. Additionally,  under applicable principles of law,
in the absence of  shareholder  ratification  or approval  by  directors  of the
Company who may be deemed disinterested,  transactions involving contracts among
the Company and any other  companies  under common control with the Company must
be fair to all companies involved. Furthermore, each director and officer of the
Company owes fiduciary duties of good faith and fair dealing with respect to all
shareholders of the company or companies for which they serve.



<PAGE>



Certain Contractual Relationships and Transactions

      Intercorporate Services Agreements. The Company and Contran are parties to
an intercorporate  services  agreement (the "Contran ISA") whereby Contran makes
available  to the Company the  services of Harold C. Simmons to consult with the
Company  and  assist in the  development  and  implementation  of the  Company's
strategic  plans and  objectives.  The services do not include  major  corporate
acquisitions,  divestitures  and other special projects outside the scope of the
Company's  business  as it has  been  conducted  in the  past.  NL paid  Contran
approximately  $500,000  in 1997 for  services  pursuant  to the Contran ISA and
expects to pay  approximately  the same  amount in 1998 for such  services.  The
Contran ISA is subject to termination or renewal by mutual  agreement and may be
terminated by either party pursuant to a written notice  delivered 30 days prior
to a quarter-end.  The Company will continue to pay directors' fees and expenses
separately to Harold C. Simmons.  See  "Compensation  of Directors and Executive
Officers and Other Information" above.

      The Company and Valhi are parties to an intercorporate  services agreement
(the "Valhi ISA")  whereby  Valhi  renders  certain  management,  financial  and
administrative  services to the Company  and the  Company  made the  services of
Joseph S.  Compofelice and the Company's  internal audit personnel  available to
Valhi.  In addition in 1997,  NL provided to Valhi  certain  insurance  and risk
management  services.  Mr.  Compofelice serves as an executive officer of Valhi.
The Company  received  total net fees of  approximately  $138,000 from Valhi for
services  provided during 1997 after receiving credit for certain  insurance and
risk  management  services  provided  to Valhi in 1996.  NL expects to receive a
lower net amount for services in 1998.  The Valhi ISA is subject to  termination
or renewal by mutual agreement and may be terminated by either party pursuant to
a written notice delivered 30 days prior to a quarter-end.

      The  Company  and  Tremont  are  parties  to  an  intercorporate  services
agreement  (the "Tremont  ISA")  whereby the Company makes  available to Tremont
certain  services with respect to Tremont's  insurance,  risk  management,  real
property,  internal audit and executive  secretarial needs. Tremont paid fees of
approximately  $94,000 to the Company for  services  pursuant to the Tremont ISA
during 1997. In addition,  in 1996 the Company  provided to Tremont  certain tax
services totaling approximately $100,000 for which the Company was reimbursed in
1997. The Tremont ISA is subject to  termination or renewal by mutual  agreement
for  succeeding  one-year terms and may be terminated at anytime by either party
pursuant  to 90 day prior  written  notice to the other  party.  NL  expects  to
receive approximately $105,000 for services to be provided to Tremont in 1998.

       The Company and TIMET are parties to an intercorporate services agreement
(the "TIMET ISA") whereby the Company makes available to TIMET certain  services
with respect to TIMET's tax, insurance, risk management, real property, internal
audit and executive secretarial needs. TIMET paid fees of approximately $519,000
for services  pursuant to the TIMET ISA during 1997. The TIMET ISA is subject to
termination or renewal by mutual agreement and may be terminated by either party
pursuant  to a written  notice  delivered  30 days  prior to a  quarter-end.  NL
expects to receive  approximately  $430,000 for services to be provided to TIMET
in 1998.

      Tremont  Registration  Rights  Agreement.  In connection with the December
1991 purchase by Tremont of 7.8 million  shares of Common Stock from Valhi,  the
Company entered into a Registration  Rights Agreement  pursuant to which Tremont
received  certain  registration  rights with  respect to the  purchased  shares.
Unless all registration rights are exercised earlier,  such agreement expires in
December 2001.

      Valhi Stock Options.  At December 31, 1997 Mr.  Compofelice  and Mr. Hardy
held options to purchase 50,000 and 15,000 shares, respectively, of Valhi Common
Stock under the terms of Valhi's  stock option plan at exercise  prices of $7.04
and $14.66 per share.  With respect to Mr. Hardy,  the Company has agreed to pay
Valhi the aggregate  difference between the option price and the market value of
Valhi's  Common Stock on the exercise date if such options are  exercised.  With
respect to transactions during 1997, the Company paid Valhi $106,950 pursuant to
such agreement.


<PAGE>

      Insurance Sharing Agreement.  An indirect insurance  subsidiary of Tremont
has assumed the obligations of the issuer of certain reinsurance  contracts that
relate to primary insurance  policies issued by a third-party  insurance company
in favor of Tremont and the  Company.  The  Company  and the  Tremont  insurance
subsidiary  are parties to an insurance  sharing  agreement with respect to such
reinsurance  contracts (the "Insurance Sharing  Agreement").  Under the terms of
the  Insurance  Sharing  Agreement,  the  Company  will  reimburse  the  Tremont
insurance  subsidiary  with  respect  to  certain  loss  payments  and  reserves
established by such Tremont  subsidiary that (a) arise out of claims against the
Company  and its  subsidiaries  (the "NL  Liabilities"),  and (b) are subject to
payment by such Tremont  subsidiary  under its  reinsurance  contracts  with the
third-party insurance company. Also pursuant to the Insurance Sharing Agreement,
the  Tremont  insurance  subsidiary  is to credit the  Company  with  respect to
certain underwriting profits or recoveries that such Tremont subsidiary receives
from  independent  reinsurers that relate to the NL Liabilities.  As of December
31, 1997 the Company had current accounts payable to such Tremont  subsidiary of
approximately $3.4 million with respect to such Agreement.

                               CERTAIN LITIGATION

      In September  1996, a purported  shareholder  derivative suit was filed in
the Chancery Division of the New Jersey Superior Court,  Bergen County (Seinfeld
v. Simmons et al., Civ.  Action No.  C-336-96)  challenging  the Company's  1991
purchase of approximately  10.9 million shares of Common Stock from Valhi,  Inc.
in  connection  with a "Dutch  auction"  tender offer to all  shareholders.  The
complaint  names as  defendants  the Company,  Valhi,  and the seven persons who
served on the Company's Board of Directors in 1991. The complaint alleges, among
other things,  that the Company's purchase of shares in the Dutch auction was an
unfair and wasteful expenditure of the Company's funds that constituted a breach
of the defendants' fiduciary duties to the Company's shareholders. The complaint
seeks, among other things, rescission of the purchase from Valhi pursuant to the
Dutch auction and plaintiff has stated that damages sought are $149 million. The
Company  and  the  other  defendants  answered  the  complaint  and  denied  all
allegations of wrongdoing.  In February 1998, the Company and Valhi executed and
filed with the court a proposed stipulation of settlement of the case. Under the
proposed  settlement,  which is  subject  to court  approval,  Valhi  agreed  to
transfer to the Company  750,000  shares of Common Stock,  subject to adjustment
depending on the average sales price of the shares during a fifteen  trading day
period  ending  five  trading  days  prior to the  transfer,  up to a maximum of
825,000 shares and down to a minimum of 675,000 shares. Valhi has the option, in
lieu of transferring the shares,  to transfer cash or cash equivalents  equal to
the product of the number of shares that would  otherwise have been  transferred
to the Company times the average price.  If approved by the court,  the transfer
of shares or cash is expected  to occur in the second or third  quarter of 1998.
Pursuant to the proposed  settlement and subject to court approval,  the Company
will reimburse  plaintiffs  for attorneys'  fees of up to $3 million and related
costs.

      In November 1991, a purported shareholder derivative suit was filed in the
Court of Chancery of the State of Delaware,  New Castle  County (Kahn v. Tremont
Corporation,  et al., No. 12339),  in connection with Tremont's  purchase of 7.8
million  shares  of NL's  outstanding  Common  Stock  from  Valhi in  1991.  The
complaint  named  as  defendants  Valhi  and all the  members  of the  Board  of
Directors of Tremont, including Messrs. Martin, Glenn Simmons and Harold Simmons
and Ms.  Alderton,  and alleged that  Tremont's  purchase of the Company  shares
constituted  a waste of  Tremont's  assets and a breach of  fiduciary  duties by
Tremont's  Board.  A trial in this matter was held in June 1995.  In March 1996,
the Court issued its opinion ruling in favor of the defendants,  concluding that
the  purchase of the  interest  in NL was  entirely  fair to Tremont.  Plaintiff
appealed this  decision.  Upon appeal,  the Delaware  Supreme Court reversed and
remanded  the  case to the  Chancery  Court  for  further  consideration  of the
fairness of the transaction. In March 1998, Tremont and Valhi executed and filed
with the court a  proposed  stipulation  of  settlement  of the case.  Under the
proposed  settlement,  which is  subject  to court  approval,  Valhi  agreed  to
transfer to Tremont 1.2 million  shares of Common  Stock,  subject to adjustment
depending on the average sales price of the shares during a fifteen  trading day
period  ending five trading days prior to the  transfer,  up to a maximum of 1.4
million shares and down to a minimum of 1 million shares.  Valhi has the option,
in lieu of transferring the shares,  to transfer cash or cash equivalents  equal
to  the  product  of the  number  of  shares  that  would  otherwise  have  been
transferred  to Tremont times the average price.  If approved by the court,  the
transfer of shares or cash is  expected to occur in the second or third  quarter
of 1998.


<PAGE>

                             INDEPENDENT ACCOUNTANTS

      The firm of Coopers & Lybrand L.L.P. served as independent auditors of the
Company for the year ended  December 31, 1997,  and is expected to be considered
for  appointment to serve for the year ended December 31, 1998.  Representatives
of Coopers & Lybrand L.L.P. are not expected to attend the Annual Meeting.


                  SHAREHOLDER PROPOSALS FOR 1999 ANNUAL MEETING

      In order to be included in the Company's 1999 proxy  statement and form of
proxy, shareholder proposals for the 1999 annual meeting of shareholders must be
received at the principal  executive  offices of the Company,  16825  Northchase
Drive,  Suite 1200,  Houston,  Texas  77060,  Attention:  Mr.  David B.  Garten,
Secretary, not later than December 15, 1998. All such proposals shall be treated
in accordance with applicable rules administered by the Commission.


                         1997 ANNUAL REPORT ON FORM 10-K

      A copy of the Company's 1997 Annual Report on Form 10-K, as filed with the
Commission,  may be  obtained  without  charge by  writing:  Investor  Relations
Department,  NL Industries,  Inc., 16825 Northchase Drive, Suite 1200,  Houston,
Texas 77060.


                                  OTHER MATTERS

      The Board does not know of any business  except as  described  above which
may be presented for  consideration  at the Annual Meeting.  If any business not
described  in this  Proxy  Statement  should  properly  come  before  the Annual
Meeting,  the persons  designated as agents in the enclosed proxy card or voting
instruction  form will vote on those  matters  in  accordance  with  their  best
judgment.


                                          NL INDUSTRIES, INC.

Houston, Texas
March 26, 1998




<PAGE>



                                                                     APPENDIX A


                               NL INDUSTRIES, INC.

                          1998 Long-Term Incentive Plan


      Section 1.  Purpose.  The purpose of this Plan is to advance the interests
of NL and its  shareholders by providing  incentives to certain Eligible Persons
who  contribute   significantly  to  the  strategic  and  long-term  performance
objectives and growth of the Company.

      Section  2.  Definitions.  The  following  terms  shall  have the  meaning
indicated:

            (a) "Actual Value" has the meaning set forth in Section 9.

            (b) "Associated  Award" shall mean an Award granted  concurrently or
     subsequently in conjunction with another Award.

            (c)  "Award"  shall  mean an award of rights to an  Eligible  Person
     under this Plan.

            (d) "Award Period" has the meaning set forth in subsection 9(b).

            (e) "Beneficiary" has the meaning set forth in Section 16.

            (f) "Board" shall mean the board of directors of NL.

            (g) "Code" shall mean the Internal  Revenue Code of 1986,  as it now
     exists or may be amended from time to time,  and the rules and  regulations
     promulgated  thereunder,  as they may exist or may be amended  from time to
     time.

            (h)  "Committee"  shall  mean a  committee  of the  Board,  if  any,
     designated  by the Board to  administer  this Plan that is comprised of not
     fewer  than  two  directors  and  shall   initially  mean  the  Management,
     Development &  Compensation  Committee of the Board.  The membership of the
     Committee or any  successor  committee  (i) shall  consist of  "nonemployee
     directors"  (as  defined  in Rule  16b-3)  and  meet any  other  applicable
     requirements so as to comply at all times with the applicable  requirements
     of Rule 16b-3,  (ii) shall  consist of "outside  directors"  (as defined in
     Treasury Regulation  ss.1.162-27(e)(3)(i)  or any successor regulation) and
     meet any other  applicable  requirements  so as to comply at all times with
     the  applicable  requirements  of Section  162(m) and (iii)  shall meet any
     applicable  requirements  of any stock  exchange or other market  quotation
     system on which  Common  Shares are  listed.  References  to the  Committee
     hereunder  shall include the Board or the  Designated  Administrator  where
     appropriate.

            (i) "Company" shall mean NL and any parent or subsidiary of NL.

            (j) "Common  Shares"  shall mean shares of common  stock,  par value
     $0.125 per share, of NL and stock of any other class into which such shares
     may thereafter be changed.

            (k) "Designated  Administrator" has the meaning set forth in Section
     3.

            (l) "Effective  Date" shall mean the date the  shareholders  approve
     the adoption of the Plan.



<PAGE>



            (m) "Eligible  Person(s)" shall mean those persons who are employees
     of the Company or other  individuals who perform  services for the Company,
     including,  without  limitation,  directors  who are not  employees  of the
     Company.

            (n) "Exchange Act" shall mean the  Securities  Exchange Act of 1934,
     as it now  exists  or may be  amended  from  time to  time,  and the  rules
     promulgated  thereunder,  as they may exist or may be amended  from time to
     time.

            (o) "Fair  Market  Value"  shall mean such  value  rounded up to the
     nearest cent as determined by the Committee in accordance  with  applicable
     law.

            (p)  "Incentive  Stock  Option" shall mean a Stock Option that is an
     incentive  stock  option as defined in Section  422 of the Code.  Incentive
     Stock  Options  are  subject,  in  part,  to  the  terms,   conditions  and
     restrictions described in Section 6.

            (q) "Maximum Value" has the meaning set forth in subsection 9(a).

            (r) "NL" shall mean NL Industries, Inc., a New Jersey corporation.

            (s)  "Nonqualified  Stock  Option" shall mean a Stock Option that is
     not an  Incentive  Stock  Option as  defined  in  Section  422 of the Code.
     Nonqualified Stock Options are subject,  in part, to the terms,  conditions
     and restrictions described in Section 6.

            (t)  "Other NL  Securities"  shall  mean NL  securities  (which  may
     include,  but need not be limited to,  unbundled  stock units or components
     thereof, debentures, preferred stock, warrants, securities convertible into
     Common Shares or other property) other than Common Shares.

            (u) "Participant" shall mean an Eligible Person to whom an Award has
     been granted under this Plan.

            (v) "Performance Grant" shall mean an Award subject, in part, to the
     terms,  conditions  and  restrictions  described in Section 9,  pursuant to
     which the recipient may become  entitled to receive  cash,  Common  Shares,
     Other NL  Securities  or  property,  or  other  forms  of  payment,  or any
     combination thereof, as determined by the Committee.

            (w)  "Plan"  shall  mean this NL  Industries,  Inc.  1998  Long-Term
     Incentive Plan.

            (x) "Purchased  Option" shall mean a Stock Option that is sold to an
     Eligible Person at a price determined by the Committee.  Purchased  Options
     are subject, in part, to the terms,  conditions and restrictions  described
     in Section 6.

            (y)  "Restricted  Period" has the  meaning  set forth in  subsection
     8(b).

            (z) "Restricted Stock" shall mean an Award of Common Shares that are
     issued  subject,  in  part,  to  the  terms,  conditions  and  restrictions
     described in Section 8.

            (aa)  "Rule  16b-3"  shall  mean  Rule  16b-3   promulgated  by  the
     Securities and Exchange Commission under the Exchange Act and any successor
     rule.

            (bb) "Section 162(m)" shall mean ss.162(m) of the Code, any rules or
     regulations  promulgated  thereunder,  as they may exist or may be  amended
     from time to time, or any successor to such section.

            (cc) "Stock  Appreciation  Right"  shall mean an Award of a right to
     receive (without payment to NL) cash, Common Shares, Other NL Securities or
     property,  or other  forms  of  payment,  or any  combination  thereof,  as
     determined by the Committee, based on the increase in the value of the



<PAGE>



     number of Common Shares specified in the Stock  Appreciation  Right.  Stock
     Appreciation  Rights are subject,  in part,  to the terms,  conditions  and
     restrictions described in Section 7.

            (dd)  "Stock  Option"  shall  mean an Award  of a right to  purchase
     Common  Shares.  The term Stock Option  shall  include  Nonqualified  Stock
     Options, Incentive Stock Options and Purchased Options.

            (ee) "Ten  Percent  Employee"  shall mean an employee of the Company
     who owns stock  representing  more than ten percent of the voting  power of
     all classes of stock of NL or any parent or subsidiary of NL.

            (ff) "Treasury Regulation" shall mean a final, proposed or temporary
     regulation of the  Department of Treasury  under the Code and any successor
     regulation.

      Section 3.  Administration.  Unless the Board shall designate  itself or a
Designated Administrator to administer this Plan or to administer certain Awards
under this Plan,  this Plan shall be  administered  by the Committee.  If at any
time Rule 16b-3 so permits without adversely  affecting the ability of Awards to
executive officers of NL to comply with the conditions for Rule 16b-3 or Section
162(m),  the Committee may delegate the  administration  of this Plan and any of
its power and authority in whole or in part, on such terms and  conditions,  and
to such person or persons as it may determine in its  discretion (a  "Designated
Administrator").

      The  Committee  has all the powers vested in it by the terms of this Plan,
such powers to include exclusive  authority to select the Eligible Persons to be
granted  Awards under this Plan,  to determine  the type,  size and terms of the
Award to be made to each Eligible  Person  selected,  to modify the terms of any
Award that has been granted,  to determine the time when Awards will be granted,
to  establish  performance  objectives,  to make any  adjustments  necessary  or
desirable  as a result of the  granting  of Awards to Eligible  Persons  located
outside the United States and to prescribe the form of the agreements  embodying
Awards made under this Plan.  The Committee is authorized to interpret this Plan
and the Awards  granted  under this Plan,  to  establish,  amend and rescind any
rules  and   regulations   relating  to  this  Plan,   and  to  make  any  other
determinations  that it deems necessary or desirable for the  administration  of
this Plan.  The  Committee  may  correct  any defect or supply any  omission  or
reconcile  any  inconsistency  in this Plan or in any Award in the manner and to
the extent the Committee  deems  necessary or desirable to carry it into effect.
Any decision of the Committee in the  interpretation  and administration of this
Plan, as described herein, shall lie within its sole and absolute discretion and
shall be final,  conclusive and binding on all parties concerned.  The Committee
may act only by a majority  of its  members in office,  except  that the members
thereof  may  authorize  any one or more of their  members or any officer of the
Company to execute and deliver documents or to take any other ministerial action
on  behalf  of the  Committee  with  respect  to  Awards  made  or to be made to
Participants.

      No member of the  Committee  and no officer of the Company shall be liable
for  anything  done or  omitted  to be done by him,  by any other  member of the
Committee or by any officer of the Company in connection with the performance of
duties under this Plan,  except for his own willful  misconduct  or as expressly
provided by statute.  In addition  to all other  rights of  indemnification  and
reimbursement  to which a member of the  Committee and an officer of the Company
may be entitled,  the Company shall indemnify and hold harmless each such member
or  officer  who was or is a party  or is  threatened  to be made a party to any
threatened,  pending or  completed  proceeding  or suit in  connection  with the
performance  of duties under this Plan against  expenses  (including  reasonable
attorneys'  fees),  judgments,  fines,  liabilities,  losses and amounts paid in
settlement  actually  and  reasonably  incurred by him in  connection  with such
proceeding  or suit,  except  for his own  willful  misconduct  or as  expressly
provided otherwise by statute.  Expenses (including  reasonable attorneys' fees)
incurred by a such a member or officer in defending any such  proceeding or suit
shall  be paid by the  Company  in  advance  of the  final  disposition  of such
proceeding  or suit upon  receipt  of a written  affirmation  by such  member or
officer  of his  good  faith  belief  that he has met the  standard  of  conduct
necessary for  indemnification and a written undertaking by or on behalf of such
member or officer to repay such amount if it shall ultimately be determined that
he is not  entitled  to be  indemnified  by the  Company as  authorized  in this
Section.

      Section 4.  Participation.  Consistent with the purposes of this Plan, the
Committee  shall have  exclusive  power to select the  Eligible  Persons who may
participate in this Plan and be granted Awards under this Plan. Eligible Persons
may be selected  individually  or by groups or categories,  as determined by the
Committee in its discretion.


<PAGE>




      Section 5. Awards under this Plan.

            (a) Types of Awards.  Awards under this Plan may  include,  but need
      not be limited to, one or more of the following types,  either alone or in
      any  combination  thereof:  (i) Stock  Options,  (ii)  Stock  Appreciation
      Rights,  (iii) Restricted Stock, (iv) Performance Grants and (v) any other
      type of Award deemed by the  Committee in its  discretion to be consistent
      with the purposes of this Plan  (including,  but not limited to, Awards of
      or options or similar rights granted with respect to unbundled stock units
      or  components  thereof,  and  Awards to be made to  Participants  who are
      foreign  nationals  or are  employed or  performing  services  outside the
      United States).

            (b) Maximum Number of Shares that May be Issued. There may be issued
      under this Plan (as Restricted  Stock,  in payment of Performance  Grants,
      pursuant to the exercise of Stock Options or Stock Appreciation  Rights or
      in payment of or  pursuant  to the  exercise  of such other  Awards as the
      Committee, in its discretion, may determine) an aggregate of not more than
      5,000,000 Common Shares,  subject to adjustment as provided in Section 15.
      No  Eligible  Person  may  receive  Awards  under  this Plan for more than
      1,000,000  Common  Shares  in  any  one  fiscal  year  of NL,  subject  to
      adjustment as provided in Section 15.  Common  Shares  issued  pursuant to
      this Plan may be either  authorized but unissued shares,  treasury shares,
      reacquired shares or any combination  thereof. If any Common Shares issued
      as  Restricted  Stock or otherwise  subject to  repurchase  or  forfeiture
      rights are  reacquired  by the Company  pursuant to such rights or, if any
      Award is canceled,  terminates or expires  unexercised,  any Common Shares
      that would otherwise have been issuable pursuant thereto will be available
      for issuance under new Awards.

            (c)  Rights  with  Respect to Common  Shares  and Other  Securities.
      Except as provided in subsection 8(c) with respect to Awards of Restricted
      Stock and unless otherwise  determined by the Committee in its discretion,
      a Participant to whom an Award is made (and any person  succeeding to such
      a  Participant's  rights  pursuant to this Plan) shall have no rights as a
      stockholder  with respect to any Common Shares or as a holder with respect
      to other securities, if any, issuable pursuant to any such Award until the
      date of the issuance of a stock  certificate to him for such Common Shares
      or other  instrument of ownership,  if any.  Except as provided in Section
      15, no  adjustment  shall be made for  dividends,  distributions  or other
      rights  (whether   ordinary  or   extraordinary,   and  whether  in  cash,
      securities,  other  property  or  other  forms  of  consideration,  or any
      combination  thereof)  for which the record date is prior to the date such
      stock certificate or other instrument of ownership,  if any, is issued. In
      all events,  a Participant  with whom an Award  agreement is made to issue
      Common Shares in the future,  shall have no rights as a  stockholder  with
      respect to Common Shares related to such  agreement  until issuance to him
      of a stock certificate representing such shares.

      Section 6. Stock  Options.  The  Committee may sell  Purchased  Options or
grant other Stock  Options  either  alone,  or in  conjunction  with  Associated
Awards, either at the time of grant or by amendment thereafter; provided that an
Incentive Stock Option may be granted only to Eligible Persons who are employees
of the  Company  and have an  Associated  Award  only to the  extent  that  such
Associated Award does not disqualify the Incentive Stock Option's status as such
under the Code.  Each  Stock  Option  granted  or sold  under this Plan shall be
evidenced by an agreement in such form as the  Committee  shall  prescribe  from
time to time in accordance  with this Plan and shall comply with the  applicable
terms and  conditions  of this Section and this Plan,  and with such other terms
and  conditions,  including,  but not  limited to,  restrictions  upon the Stock
Option or the Common Shares issuable upon exercise thereof, as the Committee, in
its discretion, shall establish.

            (a) The exercise price of a Stock Option may be less than, equal to,
      or greater  than,  the Fair Market Value of the Common  Shares  subject to
      such Stock Option at the time the Stock Option is granted,  as  determined
      by the  Committee;  provided,  however,  that in the case of an  Incentive
      Stock  Option  granted to an employee of the Company,  the exercise  price
      shall not be less than the Fair Market Value of the Common Shares  subject
      to such  Stock  Option at the time the  Stock  Option  is  granted,  or if
      granted to a Ten Percent  Employee,  such exercise price shall not be less
      than  110% of such  Fair  Market  Value at the time the  Stock  Option  is
      granted.  In no event,  however,  will the  exercise  price per share of a
      Stock Option be less than the par value per share of a Common Share.


<PAGE>

            (b) The Committee  shall determine the number of Common Shares to be
      subject to each Stock  Option.  In the case of a Stock  Option  awarded in
      conjunction with an Associated  Award, the number of Common Shares subject
      to an outstanding  Stock Option may be reduced on an appropriate  basis to
      the  extent  that the  Associated  Award  has been  exercised,  paid to or
      otherwise received by the Participant, as determined by the Committee.

            (c) Any Stock Option may be  exercised  during its term only at such
      time or times and in such installments as the Committee may establish.

            (d) A Stock Option shall not be exercisable:

                  (i) in the case of any Incentive Stock Option granted to a Ten
            Percent  Employee,  after the expiration of five years from the date
            it is granted, and, in the case of any other Stock Option, after the
            expiration of ten years from the date it is granted; and

                  (ii)  unless  payment  in full is made  for the  shares  being
            acquired   thereunder  at  the  time  of  exercise  as  provided  in
            subsection 6(i).

            (e) The Committee  shall  determine in its discretion and specify in
      each  agreement   embodying  a  Stock  Option  the  effect,  if  any,  the
      termination  of  the  Participant's  employment  with  or  performance  of
      services  for the Company  shall have on the  exercisability  of the Stock
      Option;  provided,  however,  that an Incentive  Stock Option shall not be
      exercisable  at a time that is beyond the time an  Incentive  Stock Option
      may be exercised in order to qualify as such under the Code.

            (f) In the case of an  Incentive  Stock  Option,  the  amount of the
      aggregate  Fair Market Value of Common Shares  (determined  at the time of
      grant of the Stock Option) with respect to which  Incentive  Stock Options
      are  exercisable  for the first time by an employee of the Company  during
      any calendar  year (under all such plans of his employer  corporation  and
      its parent and subsidiary corporations) shall not exceed $100,000.

            (g) It is the intent of NL that  Nonqualified  Stock Options granted
      under this Plan not be classified  as Incentive  Stock  Options,  that the
      Incentive  Stock Options  granted  under this Plan be consistent  with and
      contain or be deemed to contain all provisions  required under Section 422
      and the  other  appropriate  provisions  of the Code and any  implementing
      regulations  (and  any  successor  provisions   thereof),   and  that  any
      ambiguities  in  construction  shall be interpreted in order to effectuate
      such intent.

            (h) A  Purchased  Option  may  contain  such  additional  terms  not
      inconsistent   with  this  Plan,   including   but  not   limited  to  the
      circumstances  under which the purchase price of such Purchased Option may
      be returned to the holder of the  Purchased  Option,  as the Committee may
      determine in its sole discretion.

            (i) For purposes of payments made to exercise  Stock  Options,  such
      payment shall be made in such form  (including,  but not limited to, cash,
      Common Shares, the surrender of another  outstanding Award under this Plan
      or  any  combination  thereof)  as  the  Committee  may  determine  in its
      discretion; provided, however, that for purposes of making such payment in
      Common  Shares,  such shares shall be valued at their Fair Market Value on
      the day of  exercise  and shall  have been held by the  Participant  for a
      period of at least six (6) months.

      Section  7. Stock  Appreciation  Rights.  The  Committee  may grant  Stock
Appreciation  Rights either alone,  or in conjunction  with  Associated  Awards,
either  at the time of grant or by  amendment  thereafter.  Each  Award of Stock
Appreciation  Rights  granted under this Plan shall be evidenced by an agreement
in such form as the Committee  shall  prescribe  from time to time in accordance
with this Plan and shall comply with the applicable terms and conditions of this
Section and this Plan, and with such other terms and conditions,  including, but
not limited to,  restrictions upon the Award of Stock Appreciation Rights or the
Common  Shares  issuable  upon  exercise  thereof,  as  the  Committee,  in  its
discretion, shall establish.


<PAGE>

            (a) The Committee  shall determine the number of Common Shares to be
      subject  to each  Award of Stock  Appreciation  Rights.  In the case of an
      Award  of  Stock  Appreciation  Rights  awarded  in  conjunction  with  an
      Associated  Award,  the number of Common Shares  subject to an outstanding
      Award of Stock Appreciation  Rights may be reduced on an appropriate basis
      to the extent that the  Associated  Award has been  exercised,  paid to or
      otherwise received by the Participant, as determined by the Committee.

            (b) The Award of Stock Appreciation Rights shall not be exercisable:

                 (i)  unless  the  Associated  Award,  if  any,  is at the  time
            exercisable;

                 (ii) if the  Associated  Award is a Stock  Option  and the Fair
            Market  Value per share of the Common  Shares on the  exercise  date
            does not exceed the exercise  price per share of such Stock  Option;
            or

                 (iii) if the Associated  Award is an Incentive Stock Option and
            the  exercise  of the  Award  of  Stock  Appreciation  Rights  would
            disqualify the Incentive Stock Option as such under the Code.

            (c) The Committee  shall  determine in its discretion and specify in
      each agreement embodying an Award of Stock Appreciation Rights the effect,
      if  any,  the  termination  of  the   Participant's   employment  with  or
      performance  of services for the Company shall have on the  exercisability
      of the Award of Stock Appreciation Rights.

            (d) An Award of Stock  Appreciation  Rights shall entitle the holder
      to exercise such Award or to surrender unexercised an Associated Award (or
      any  portion of such  Associated  Award) to NL and to  receive  from NL in
      exchange  thereof,  without  payment to NL, that  number of Common  Shares
      having  an  aggregate  value  equal  to  (or,  in  the  discretion  of the
      Committee, less than) the excess of the Fair Market Value of one share, at
      the time of such exercise,  over the exercise  price,  times the number of
      shares subject to the Award or the Associated  Award, or portion  thereof,
      that is so exercised  or  surrendered,  as the case may be. The  Committee
      shall be  entitled  in its  discretion  to elect to settle the  obligation
      arising out of the exercise of a Stock  Appreciation  Right by the payment
      of cash or Other NL Securities  or property,  or other forms of payment or
      any  combination  thereof,  as determined by the  Committee,  equal to the
      aggregate  value of the Common  Shares it would  otherwise be obligated to
      deliver.  Any  such  election  by the  Committee  shall be made as soon as
      practicable  after the receipt by the  Committee of written  notice of the
      exercise of the Stock Appreciation Right.

            (e) A Stock  Appreciation  Right may provide that it shall be deemed
      to have  been  exercised  at the close of  business  on the  business  day
      preceding the expiration  date of the Stock  Appreciation  Right or of the
      related Stock Option (or other Award),  or such other date as specified by
      the  Committee,  if at such  time  such  Stock  Appreciation  Right  has a
      positive value.  Such deemed exercise shall be settled or paid in the same
      manner as a regular  exercise  thereof  as  provided  in  subsection  7(d)
      hereof.

      Section 8. Restricted  Stock. The Committee may grant Awards of Restricted
Stock either alone, or in conjunction with Associated Awards, either at the time
of grant or by amendment  thereafter.  Each Award of Restricted Stock under this
Plan shall be  evidenced by an  agreement  in such form as the  Committee  shall
prescribe  from time to time in accordance  with this Plan and shall comply with
the applicable terms and conditions of this Section and this Plan, and with such
other terms and conditions as the Committee, in its discretion, shall establish.

            (a) The Committee  shall determine the number of Common Shares to be
      issued to a Participant pursuant to the Award of Restricted Stock, and the
      extent,  if any, to which they shall be issued in exchange for cash, other
      consideration, or both.

            (b) Until the  expiration  of such  period  as the  Committee  shall
     determine  from the date on which the Award is granted  and subject to such
     other  terms  and  conditions  as the  Committee  in its  discretion  shall
     establish  (the  "Restricted  Period"),  a Participant  to whom an Award of
     Restricted Stock is made shall be issued, but shall not be entitled to the


<PAGE>

     delivery of, a stock certificate  representing the Common Shares subject to
     such Award.

            (c) Unless otherwise  determined by the Committee in its discretion,
      a Participant to whom an Award of Restricted  Stock has been made (and any
      person  succeeding to such a  participant's  rights pursuant to this Plan)
      shall  have,  after  issuance  of a  certificate  for the number of Common
      Shares  awarded  and prior to the  expiration  of the  Restricted  Period,
      ownership of such Common  Shares,  including the right to vote such Common
      Shares and to receive dividends or other  distributions  made or paid with
      respect to such Common Shares  (provided that such Common Shares,  and any
      new,  additional or different  shares, or Other NL Securities or property,
      or other forms of  consideration  that the  Participant may be entitled to
      receive with  respect to such Common  Shares as a result of a stock split,
      stock dividend or any other change in the corporation or capital structure
      of NL,  shall be  subject to the  restrictions  hereinafter  described  as
      determined by the Committee in its discretion),  subject,  however, to the
      options,  restrictions  and limitations  imposed thereon  pursuant to this
      Plan.

            (d) The Committee  shall  determine in its discretion and specify in
      each agreement  embodying an Award of Restricted Stock the effect, if any,
      the  termination of the  Participant's  employment  with or performance of
      services for the Company during the  Restricted  Period shall have on such
      Award of Restricted Stock.

      Section  9.  Performance   Grants.  The  Committee  may  grant  Awards  of
Performance  Grants either alone,  or in  conjunction  with  Associated  Awards,
either  at the  time  of  grant  or by  amendment  thereafter.  The  Award  of a
Performance  Grant to a  Participant  will  entitle  him to receive a  specified
amount  determined  by the  Committee  (the  "Actual  Value"),  if the terms and
conditions specified in this Plan and in the Award are satisfied.  Each Award of
a Performance  Grant shall be subject to the applicable  terms and conditions of
this Section and this Plan,  and to such other terms and  conditions,  including
but not  limited  to,  restrictions  upon  any  cash,  Common  Shares,  Other NL
Securities or property,  or other forms of payment, or any combination  thereof,
issued  with  respect  to  the  Performance  Grant,  as  the  Committee,  in its
discretion,  shall establish, and shall be embodied in an agreement in such form
and substance as is determined by the Committee.

            (a) The Committee  shall determine the value or range of values of a
     Performance  Grant to be awarded to each Participant  selected for an Award
     and whether or not such a Performance  Grant is granted in conjunction with
     an Associated  Award. As determined by the Committee,  the maximum value of
     each Performance  Grant (the "Maximum Value") shall be: (i) an amount fixed
     by the Committee at the time the Award is made or amended thereafter,  (ii)
     an amount  that  varies  from time to time based in whole or in part on the
     then current value of the Common  Shares,  Other NL Securities or property,
     or other  securities or property,  or any  combination  thereof or (iii) an
     amount that is  determinable  from  criteria  specified  by the  Committee.
     Performance  Grants may be issued in  different  classes  or series  having
     different names,  terms and conditions.  In the case of a Performance Grant
     awarded in conjunction with an Associated  Award, the Performance Grant may
     be reduced on an appropriate  basis to the extent that the Associated Award
     has been exercised,  paid to or otherwise  received by the Participant,  as
     determined by the Committee.

            (b) The award period  ("Award  Period")  related to any  Performance
     Grant shall be a period determined by the Committee. At the time each Award
     is  made,  the  Committee  shall  establish  performance  objectives  to be
     attained  within the Award  Period as the means of  determining  the Actual
     Value of such a Performance  Grant.  The  performance  objectives  shall be
     based on such measure or measures of  performance,  which may include,  but
     need not be limited to, the performance of the Participant,  the Company or
     one or more of its divisions or units, or any combination of the foregoing,
     as the Committee shall  determine,  and may be applied on an absolute basis
     or be relative to industry or other indices or any combination thereof. The
     Actual  Value of a  Performance  Grant shall be equal to its Maximum  Value
     only if the performance  objectives are attained in full, but the Committee
     shall  specify the manner in which the Actual Value of  Performance  Grants
     shall be determined if the  performance  objectives  are met in part.  Such
     performance  measures,  the  Actual  Value  or the  Maximum  Value,  or any
     combination  thereof, may be adjusted in any manner by the Committee in its
     discretion  at any  time  and  from  time  to  time  during  or as  soon as
     practicable  after the Award Period, if it determines that such performance


<PAGE>



     measures,  the  Actual  Value  or the  Maximum  Value,  or any  combination
     thereof, are not appropriate under the circumstances.

            (c) The Committee  shall  determine in its discretion and specify in
     each  agreement  embodying  a  Performance  Grant the effect,  if any,  the
     termination of the Participant's employment with or performance of services
     for the  Company  during the Award  Period  shall have on such  Performance
     Grant.

            (d) The  Committee  shall  determine  whether  the  conditions  of a
     Performance  Grant have been met and,  if so,  shall  ascertain  the Actual
     Value of the  Performance  Grant.  If the  Performance  Grant has no Actual
     Value,  the Award and such  Performance  Grant shall be deemed to have been
     canceled and the Associated  Award, if any, may be canceled or permitted to
     continue in effect in accordance with its terms.  If the Performance  Grant
     has any Actual Value and:

                 (i) was not awarded in  conjunction  with an Associated  Award,
            the Committee shall cause an amount equal to the Actual Value of the
            Performance Grant earned by the Participant to be paid to him or his
            permitted assignee or Beneficiary; or

                 (ii) was awarded in conjunction  with an Associated  Award, the
            Committee shall determine,  in accordance with criteria specified by
            the Committee (A) to cancel the Performance Grant, in which event no
            amount with respect  thereto shall be paid to the Participant or his
            permitted  assignee or Beneficiary,  and the Associated Award may be
            permitted to continue in effect in accordance with its terms, (B) to
            pay the Actual Value of the Performance  Grant to the Participant or
            his permitted  assignee or Beneficiary as provided  below,  in which
            event  the  Associated  Award may be  canceled  or (C) to pay to the
            Participant or his  Beneficiary,  the Actual Value of only a portion
            of the  Performance  Grants,  in which event all or a portion of the
            Associated   Award  may  be  permitted  to  continue  in  effect  in
            accordance  with its  terms or be  canceled,  as  determined  by the
            Committee.

            Such  determination  by the  Committee  shall be made as promptly as
      practicable  following  the end of the Award  Period  or upon the  earlier
      termination  of employment or  performance  of services,  or at such other
      time or times as the Committee shall determine, and shall be made pursuant
      to criteria specified by the Committee.

            (e) Payment of any amount  with  respect to the  Performance  Grants
     that the Committee  determines to pay as provided above shall be made by NL
     as promptly  as  practicable  after the end of the Award  Period or at such
     other time or times as the Committee  shall  determine,  and may be made in
     cash,  Common  Shares,  Other NL Securities or property,  or other forms of
     payment,  or any combination thereof or in such other manner, as determined
     by the  Committee  in its  discretion.  Notwithstanding  anything  in  this
     Section to the contrary,  the Committee may, in its  discretion,  determine
     and pay out the Actual Value of the  Performance  Grants at any time during
     the Award Period.

      Section 10.  Deferral  of  Compensation.  The  Committee  shall  determine
whether or not an Award shall be made in  conjunction  with the  deferral of the
Participant's  salary, bonus or other compensation,  or any combination thereof,
and whether or not such deferred amounts may be:

            (a)  forfeited  to  the  Company  or to  other  Participants  or any
     combination  thereof,  under certain  circumstances (which may include, but
     need not be limited to,  certain  types of  termination  of  employment  or
     performance of services for the Company);

            (b)  subject  to  increase  or  decrease  in  value  based  upon the
     attainment  of or  failure  to attain,  respectively,  certain  performance
     measures; and/or

            (c) credited with income  equivalents  (which may include,  but need
     not be limited to, interest,  dividends or other rates of return) until the
     date or dates of payment of the Award, if any.



<PAGE>



      Section 11. Deferred Payment of Awards. The Committee may specify that the
payment of all or any portion of cash,  Common  Shares,  Other NL  Securities or
property,  or any other form of payment,  or any combination  thereof,  under an
Award shall be deferred until a later date.  Deferrals shall be for such periods
or until the  occurrence of such events,  and upon such terms,  as the Committee
shall  determine in its discretion.  Deferred  payments of Awards may be made by
undertaking to make payment in the future based upon the  performance of certain
investment  equivalents  (which  may  include,  but  need  not  be  limited  to,
government   securities,   Common   Shares,   other   securities,   property  or
consideration,  or any  combination  thereof),  together  with  such  additional
amounts of income equivalents (which may be compounded and may include, but need
not be  limited  to,  interest,  dividends  or  other  rates  of  return  or any
combination  thereof) as may accrue  thereon until the date or dates of payment,
such investment equivalents and such additional amounts of income equivalents to
be determined by the Committee in its discretion.

      Section 12.  Transferability  of Awards.  Except as may be approved by the
Committee,  a Participant's rights and interest under this Plan or any Award may
not be assigned or  transferred,  hypothecated or encumbered in whole or in part
either  directly or by operation  of law or otherwise  (except in the event of a
Participant's death), including, but not by way of limitation,  execution, levy,
garnishment,  attachment,  pledge,  bankruptcy or in any other manner; provided,
however, that any Incentive Stock Option granted pursuant to this Plan shall not
be transferable  other than by will or the laws of descent and  distribution and
shall be exercisable during the Participant's lifetime only by him.

      Section 13. Amendment or Substitution of Awards under this Plan. The terms
of any outstanding Award under this Plan may be amended or modified from time to
time by the Committee in its discretion in any manner that it deems  appropriate
(including,  but not  limited  to,  acceleration  of the date of exercise of any
Award and/or  payments  thereunder) if the Committee could grant such amended or
modified  Award  under the terms of this Plan at the time of such  amendment  or
modification;  provided that no such amendment or  modification  shall adversely
affect in a material  manner any right of a Participant  under the Award without
his written  consent,  unless the Committee  determines in its  discretion  that
there  have  occurred  or  are  about  to  occur  significant   changes  in  the
Participant's  position,  duties or responsibilities,  or significant changes in
economic,  legislative,  regulatory,  tax, accounting or cost/benefit conditions
that are determined by the Committee in its discretion to have or to be expected
to  have  a  substantial  effect  on the  performance  of  the  Company,  or any
affiliate,  division or department  thereof,  on this Plan or on any Award under
this Plan. The Committee may, in its discretion,  permit holders of Awards under
this Plan to  surrender  outstanding  Awards in order to exercise or realize the
rights  under  other  Awards,  or in exchange  for the grant of new  Awards,  or
require  holders  of  Awards to  surrender  outstanding  Awards  as a  condition
precedent to the grant of new Awards under this Plan.

      Section 14.  Termination  of a  Participant.  For all purposes  under this
Plan,  the  Committee  shall  determine  whether a  Participant  has  terminated
employment  with, or the  performance  of services  for, the Company;  provided,
however, an absence or leave approved by the Company, to the extent permitted by
applicable  provisions of the Code,  shall not be considered an  interruption of
employment or performance of services for any purpose under this Plan.

      Section 15. Dilution and Other Adjustments.  In the event of any change in
the outstanding Common Shares by reason of any stock split, dividend,  split-up,
split-off, spin-off,  recapitalization,  merger, consolidation, rights offering,
reorganization,  combination  or  exchange  of  shares,  a sale  by NL of all or
substantially all of its assets,  any distribution to shareholders  other than a
normal cash dividend,  or other extraordinary or unusual event, if the Committee
shall  determine,  in its  discretion,  that such change  equitably  requires an
adjustment  in the terms of any Award or the number of Common  Shares  available
for Awards,  such  adjustment  may be made by the  Committee and shall be final,
conclusive  and binding  for all  purposes of this Plan.  Each  adjustment  made
pursuant to this Section shall be made with a view toward  preserving  the value
the affected  Award had prior to the event or  transaction  giving cause to such
adjustment.

      In the  event  of the  proposed  dissolution  or  liquidation  of NL,  all
outstanding Awards shall terminate immediately prior to the consummation of such
proposed action,  unless otherwise provided by the Committee.  In the event of a
proposed sale of all or  substantially  all of the assets of NL or the merger of
NL with or into another corporation,  all restrictions on any outstanding Awards
shall lapse and  Participants  shall be entitled to the full benefit of all such
Awards  immediately  prior to the  closing  date of such sale or merger,  unless
otherwise provided by the Committee.



<PAGE>



      Section 16.  Designation of Beneficiary by Participant.  A Participant may
name a  beneficiary  to receive  any  payment to which he may be  entitled  with
respect to any Award  under  this Plan in the event of his  death,  on a written
form to be provided by and filed with the Committee,  and in a manner determined
by the Committee in its discretion (a "Beneficiary"). The Committee reserves the
right to review and approve Beneficiary  designations.  A Participant may change
his Beneficiary  from time to time in the same manner,  unless such  Participant
has made an irrevocable designation. Any designation of a Beneficiary under this
Plan (to the extent it is valid and enforceable  under  applicable law) shall be
controlling over any other disposition, testamentary or otherwise, as determined
by the Committee in its discretion.  If no designated  Beneficiary  survives the
Participant  and is living on the date on which any  amount  becomes  payable to
such a  Participant's  Beneficiary,  such  payment  will be  made  to the  legal
representatives of the Participant's  estate, and the term "Beneficiary" as used
in this Plan shall be deemed to include such person or persons. If there are any
questions  as to the legal right of any  Beneficiary  to receive a  distribution
under this Plan,  the Committee in its  discretion may determine that the amount
in  question  be  paid  to  the  legal  representatives  of  the  estate  of the
Participant,  in  which  event  the  Company,  the  Board,  the  Committee,  the
Designated Administrator (if any), and the members thereof, will have no further
liability to anyone with respect to such amount.

      Section 17. Financial  Assistance.  If the Committee  determines that such
action is  advisable,  the  Company  may assist  any  Participant  in  obtaining
financing  from the  Company  (or  under any  program  of the  Company  approved
pursuant to applicable  law), or from a bank or other third party, on such terms
as are  determined  by the  Committee,  and in such  amount  as is  required  to
accomplish the purposes of this Plan,  including,  but not limited to, to permit
the exercise of an Award, the participation  therein,  and/or the payment of any
taxes with respect thereto. Such assistance may take any form that the Committee
deems  appropriate,  including,  but not  limited  to,  a direct  loan  from the
Company,  a guarantee of the obligation by the Company or the maintenance by the
Company of deposits with such bank or third party.

      Section 18.  Miscellaneous Provisions.

            (a) Any proceeds from Awards shall constitute general funds of NL.

            (b) No  fractional  shares may be delivered  under an Award,  but in
     lieu thereof a cash or other  adjustment shall be made as determined by the
     Committee in its discretion.

            (c) No Eligible Person or other person shall have any claim or right
     to be  granted  an  Award  under  this  Plan.  Determinations  made  by the
     Committee  under this Plan need not be uniform and may be made  selectively
     among  Eligible  Persons  under  this Plan,  whether  or not such  Eligible
     Persons are  similarly  situated.  Neither  this Plan nor any action  taken
     hereunder  shall be construed  as giving any  Eligible  Person any right to
     continue to be employed by or perform  services  for the  Company,  and the
     right to terminate the employment of or performance of services by Eligible
     Persons at any time and for any reason is specifically reserved.

            (d) No Participant or other person shall have any right with respect
     to this Plan, the Common Shares reserved for issuance under this Plan or in
     any Award,  contingent  or otherwise,  until written  evidence of the Award
     shall have been  delivered to the recipient  and all the terms,  conditions
     and provisions of this Plan and the Award applicable to such recipient (and
     each person claiming under or through him) have been met.

            (e) No  Common  Shares,  Other  NL  Securities  or  property,  other
     securities or property or other forms of payment shall be issued  hereunder
     with  respect to any Award unless  counsel for NL shall be  satisfied  that
     such issuance will be in compliance  with applicable law and any applicable
     rules of any  stock  exchange  or other  market  quotation  system on which
     Common Shares are listed.

            (f) It is the  intent of NL that this  Plan  comply in all  respects
     with Rule  16b-3 and  Section  162(m)  with  respect  to Awards  granted to
     executive  officers  of NL,  that any  ambiguities  or  inconsistencies  in
     construction  of this Plan be  interpreted to give effect to such intention
     and that if any  provision  of this Plan is found  not to be in  compliance
     with Rule 16b-3 or Section 162(m),  such provision shall be deemed null and
     void with  respect to Awards  granted to  executive  officers  of NL to the
     extent required to permit such Awards to comply with Rule 16b-3 and Section


<PAGE>

     162(m).  It is also the intent of NL that this Plan comply in all  respects
     with the provisions of the Code providing  favorable treatment to Incentive
     Stock Options,  that any ambiguities or  inconsistencies in construction of
     this Plan be  interpreted  to give effect to such intention and that if any
     provision of this Plan is found not to be in compliance  with the Incentive
     Stock Option  provisions of the Code,  such provision  shall be deemed null
     and void with respect to Incentive  Stock  Options  granted to employees of
     the Company to the extent  required to permit such Incentive  Stock Options
     to receive favorable treatment under the Code.

            (g) The Company shall have the right to deduct from any payment made
     under this Plan any federal,  state, local or foreign income or other taxes
     required by law to be withheld with respect to such payment.  It shall be a
     condition  to  the  obligation  of NL to  issue  Common  Shares,  Other  NL
     Securities or property,  other  securities  or property,  or other forms of
     payment, or any combination thereof,  upon exercise,  settlement or payment
     of any Award under this Plan,  that the  Participant (or any Beneficiary or
     person  entitled to act) pay to NL, upon its demand,  such amount as may be
     required  by the Company for the purpose of  satisfying  any  liability  to
     withhold  federal,  state,  local or foreign income or other taxes.  If the
     amount  requested is not paid, NL may refuse to issue Common Shares,  Other
     NL Securities or property,  other securities or property, or other forms of
     payment, or any combination thereof.  Notwithstanding anything in this Plan
     to the contrary,  the Committee may, in its discretion,  permit an Eligible
     Person (or any  Beneficiary  or person  entitled  to act) to elect to pay a
     portion or all of the amount  requested  by the Company for such taxes with
     respect to such  Award,  at such time and in such  manner as the  Committee
     shall deem to be appropriate (including, but not limited to, by authorizing
     NL to  withhold,  or agreeing to  surrender to NL on or about the date such
     tax  liability is  determinable,  Common  Shares,  Other NL  Securities  or
     property,  other securities or property,  or other forms of payment, or any
     combination  thereof,  owned by such  person or a portion  of such forms of
     payment that would otherwise be distributed,  or have been distributed,  as
     the case may be,  pursuant  to such  Award  to such  person,  having a Fair
     Market Value equal to the amount of such taxes).

            (h) The  expenses  of this  Plan  shall  be  borne  by the  Company;
     provided,  however,  the  Company  may recover  from a  Participant  or his
     Beneficiary, heirs or assigns any and all damages, fees, expenses and costs
     incurred by the Company  arising out of any actions  taken by a Participant
     in breach  of this  Plan or any  agreement  evidencing  such  Participant's
     Award.

            (i) This Plan shall be unfunded.  The Company  shall not be required
     to establish any special or separate fund or to make any other  segregation
     of assets to assure the payment of any Award under this Plan, and rights to
     the payment of Awards shall be no greater than the rights of the  Company's
     general creditors.

            (j) By accepting any Award or other  benefit  under this Plan,  each
     Participant  and  each  person  claiming  under  or  through  him  shall be
     conclusively  deemed to have indicated his acceptance and  ratification of,
     and consent to, any action taken under this Plan by the Company, the Board,
     the Committee or the Designated Administrator (if applicable).

            (k) The appropriate  officers of the Company shall cause to be filed
     any reports, returns or other information regarding Awards hereunder of any
     Common Shares issued  pursuant hereto as may be required to be filed by the
     Company by applicable law and any applicable rules of any stock exchange or
     other market quotation system on which Common Shares are listed.

            (l) The validity, construction,  interpretation,  administration and
     effect of this Plan, and of its rules and regulations,  and rights relating
     to this Plan and to Awards  granted  under this Plan,  shall be governed by
     the substantive  laws, but not the choice of law rules, of the State of New
     Jersey.

            (m)  Records of the Company  shall be  conclusive  for all  purposes
     under this Plan or any Award,  unless  determined  by the  Committee  to be
     incorrect.



<PAGE>



            (n) If any provision of this Plan or any Award is held to be illegal
     or invalid for any reason,  the  illegality or invalidity  shall not affect
     the  remaining  provisions  of this Plan or any Award,  but such  provision
     shall be fully severable,  and this Plan or Award, as applicable,  shall be
     construed  and  enforced as if the illegal or invalid  provision  had never
     been included in this Plan or Award, as applicable.

            (o) The terms of this Plan shall  govern all Awards  under this Plan
     and in no event shall the Committee have the power to grant any Award under
     this Plan that is contrary to any of the provisions of this Plan.

            (p) For  purposes  of  interpretation  of this Plan,  the  masculine
     pronoun includes the feminine and the singular includes the plural wherever
     appropriate.

      Section  19. Plan  Amendment  or  Suspension.  This Plan may be amended or
suspended  in whole or in part at any time  from time to time by the  Board.  No
amendment of this Plan shall adversely  affect in a material manner any right of
any  Participant  with  respect to any Award  previously  granted  without  such
Participant's written consent, except as permitted under Section 13.

      Section 20. Plan  Termination.  This Plan shall terminate upon the earlier
of the following dates or events to occur:

            (a) upon the adoption of a resolution of the Board  terminating this
     Plan; or

            (b) the tenth anniversary of the Effective Date; provided,  however,
     that the Board may, prior to such date, extend the term of this Plan for an
     additional  period of up to five  years for the grant of Awards  other than
     Incentive Stock Options. No termination of this Plan shall materially alter
     or impair any of the  rights or  obligations  of any  person,  without  his
     consent,  under any Award previously  granted under this Plan,  except that
     subsequent to termination  of this Plan, the Committee may make  amendments
     or modifications permitted under Section 13.

      Section 21.  Effective Date. This Plan shall be effective,  and Awards may
be granted under this Plan, on or after the Effective Date.



<PAGE>



                                   APPENDIX B

                               NL INDUSTRIES, INC.

                       16825 NORTHCHASE DRIVE, SUITE 1200
                              HOUSTON, TEXAS 77060

              PROXY FOR ANNUAL MEETING OF SHAREHOLDERS, MAY 6, 1998

The  undersigned  hereby appoints David B. Garten and Dennis G. Newkirk and each
of them, the proxy and attorney-in-fact for the undersigned,  with full power of
substitution  in each, to represent the undersigned and to vote on behalf of the
undersigned at the Annual Meeting of Shareholders  of NL Industries,  Inc. to be
held on May 6, 1998, and at any adjournment or postponement of such meeting (the
"Annual Meeting"), all shares of Common Stock of NL Industries, Inc. standing in
the name of the  undersigned or which the undersigned may be entitled to vote on
the matters described on the reverse side.

THIS PROXY IS SOLICITED  ON BEHALF OF THE BOARD OF  DIRECTORS OF NL  INDUSTRIES,
INC.

You are  encouraged  to specify your voting  choices by marking the  appropriate
boxes on the  reverse  side of this  card but you need not mark any boxes if you
wish to vote in  accordance  with the Board of Directors'  recommendations.  The
above-named  proxies cannot vote your shares unless you sign,  date and promptly
return this card.  Please use the enclosed  return  envelope.  This proxy may be
revoked by a proxy  accepted at a later date or otherwise as set forth in the NL
Proxy Statement which accompanied this proxy card.


                                                                SEE REVERSE
                                                                    SIDE




<PAGE>



/X/          Please mark you votes as in this example

This  proxy,  if  properly  executed,  will be voted as  specified  below by the
shareholder,  if no  direction  is given,  this  proxy  will be voted  "FOR" all
nominees for Director listed below.

The Board of Directors  recommends a vote "FOR" all nominees for Director listed
below.

1.   Election of Directors.

     For    Withheld    Election of Directors.
     / /    / /           Nominees:  Joseph S. Compofelice,  J. Landis Martin,
                          Kenneth R. Peak, Glenn R. Simmons,  Harold C. Simmons,
                          Lawrence A. Wigdor,  and Admiral Elmo R. Zumwalt, Jr.



Withhold authority to vote for the following individual nominees:

- ---------------------------------------------------


2.    Proposal to adopt the         FOR   AGAINST     ABSTAIN
      NL Industries,  Inc.          / /    / /         / /
      1998 Long-Term
      Incentive Plan.

3.    In their  discretion,  proxies  are  authorized  to vote upon  other  such
      business  as  may  properly   come  before  the  Annual   Meeting  or  any
      adjournments or postponements thereof.


                                        Please  sign  exactly  as  shareholder's
                                        name appears on this card.  Joint owners
                                        should  each  sign.   When   signing  as
                                        attorney,    executor,    administrator,
                                        trustee or  guardian,  please  give full
                                        title  as  such.  If  a  corporation  or
                                        partnership,  please sign full corporate
                                        or partnership  name and sign authorized
                                        person's name and title.

                                        The   undersigned   shareholder   hereby
                                        revokes all proxies  heretofore given by
                                        the  undersigned  to vote at the  Annual
                                        Meeting   or   any    adjournments    or
                                        postponements thereof.



                                        ----------------------------------------


                                        ----------------------------------------
                                        SIGNATURE(S)                        DATE





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