UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549



                                   FORM 12b-25
                           NOTIFICATION OF LATE FILING


                               NL Industries, Inc

                             SEC FILE NUMBER: 1-640



    [ ] Form 10-K [ ] Form 20-F [ ] Form 11-K [ X ] Form 10-Q [ ] Form N-SAR


                      For Period Ended: September 30, 2005


      [ ] Transition Report on Form 10-K [ ] Transition Report on Form 20-F
      [ ] Transition Report on Form 11-K [ ] Transition Report on Form 10-Q
                       [ ] Transition Report on Form N-SAR
                        For the Transition Period Ended:


    Nothing in this form shall be construed to imply that the Commission has
                   verified any information contained herein.



 If the notification relates to a portion of the filing checked above, identify
          the Item(s) to which the notification relates: Not applicable







                         PART I - REGISTRANT INFORMATION


Full Name of Registrant: NL Industries, Inc

Former Name if Applicable: Not Applicable

Address of Principal Executive Office: 5430 LBJ Freeway, Suite 1700
                                       Three Lincoln Centre 
                                       Dallas, Texas  75240-2697



                        PART II - RULES 12b-25(b) AND (c)


If the subject report could not be filed without  unreasonable effort or expense
and the registrant seeks relief pursuant to Rule 12b-25(b), the following should
be completed.

[X] (a)   The reasons  described in  reasonable  detail in Part III of this form
          could not be eliminated without unreasonable effort or expense;

[X] (b)   The subject annual report,  semi-annual  report,  transition report on
          Form 10-K, Form 20-F, 11-K or Form N-SAR, or portion thereof,  will be
          filed on or before the fifteenth calendar day following the prescribed
          due date; or the subject quarterly report or transition report on Form
          10-Q,  or  portion  thereof,  will be filed  on or  before  the  fifth
          calendar day following the prescribed due date; and

[ ] (c)  The accountant's statement or other exhibit required by Rule 12b-25(c)
          has been attached, if applicable.

                              PART III - NARRATIVE


State below in reasonable  detail the reasons why Forms 10-K,  20-F, 11-K, 10-Q,
N-SAR, or the transition  report or portion  thereof,  could not be filed within
the prescribed period:


The  Registrant  has been unable to complete the  preparation  and review of its
Quarterly  Report  on Form  10-Q  for  the  quarter  ended  September  30,  2005
("Quarterly Report") within the required time period due to unanticipated delays
in assembling all information  and completing all reviews  required with respect
to such Quarterly Report.







                           PART IV - OTHER INFORMATION


(1)  Name  and  telephone  number  of  person  to  contact  in  regard  to  this
notification:

Greg  Swalwell,   Vice   President,   Finance  and  Chief   Financial   Officer.
972-233-1700.


(2) Have all other  periodic  reports  required under Section 13 or 15(d) of the
Securities  Exchange Act of 1934 or Section 30 of the Investment  Company Act of
1940  during  the  preceding  12  months  or for such  shorter  period  that the
Registrant was required to file such report(s) been filed?  If the answer is no,
identify report(s).

                                 [X] Yes [ ] No


(3) Is it anticipated that any significant  change in results of operations from
the  corresponding  period for the last  fiscal  year will be  reflected  by the
earnings statements to be included in the subject report or portion thereof?

                                 [ ] Yes [X] No

If so, attach an explanation of the  anticipated  change,  both  narratively and
quantitatively, and, if appropriate, state the reasons why a reasonable estimate
of the results cannot be made.









NL Industries,  Inc. has caused this  notification to be signed on its behalf by
the undersigned thereunto duly authorized.




Date: November 9, 2005                       NL INDUSTRIES, INC.


                                             By:    /s/ Greg Swalwell.
                                                    Greg Swalwell
                                                    Vice President, Finance and
                                                    Chief Financial Officer