Exhibit 99.1



                            CERTIFICATION PURSUANT TO
                             18 U.S.C. SECTION 1350,
                             AS ADOPTED PURSUANT TO
                  SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002


In connection with the Quarterly  Report of Valhi,  Inc. (the "Company") on Form
10-Q for the  period  ended  March 31,  2003 as filed  with the  Securities  and
Exchange  Commission  on the date hereof (the  "Report"),  I, Steven L.  Watson,
President and Chief Executive  Officer of the Company,  certify,  pursuant to 18
U.S.C.  Section 1350, as adopted  pursuant to Section 906 of the  Sarbanes-Oxley
Act of 2002, that:

(1)  The Report fully complies with the  requirements  of Section 13(a) or 15(d)
     of the Securities Exchange Act of 1934; and

(2)  The information  contained in the Report fairly  presents,  in all material
     respects, the financial condition and result of operations of the Company.



/s/  Steven L. Watson
-------------------------------------
Steven L. Watson
President and Chief Executive Officer
May 13, 2003




A signed  original of this  written  statement  required by Section 906 has been
provided to Valhi, Inc. and will be retained by Valhi, Inc. and furnished to the
Securities and Exchange Commission or its staff upon request.