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 Annual Report of Valhi, Inc. (the "Company") on Form 10-K
for the period ended December 31, 2002 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
March 18, 2003