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 Crown Cork & Seal Company,  Inc.
(the  "Company") on Form 10-Q for the period ending  September 30, 2002 as filed
with the Securities and Exchange  Commission on the date hereof (the  "Report"),
I, John W. Conway,  Chairman of the Board, 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 position and results of operations of the Company.



/s/ John W. Conway
- -------------------
John W. Conway
Chairman of the Board,
President and Chief Executive Officer


November 13, 2002