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

With reference to and to accompany the Quarterly  Report of Silgan Holdings Inc.
(the  "Company")  on Form 10-Q for the period ending June 30, 2002 as filed with
the Securities and Exchange Commission on the date hereof (the "Report"),  I, R.
Philip Silver, Co-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, to my knowledge:

     (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 results of operations of the
     Company.



/s/ R. Philip Silver
--------------------
R. Philip Silver
Chairman of the Board and Co-Chief Executive Officer

August 14, 2002