Exhibit 23.15 CONSENT OF INDEPENDENT ACCOUNTANTS We hereby consent to the incorporation by reference in the Registration Statement of Hercules Incorporated on Form S-8 (Registration Nos. 33-37279, 33-21668, 33-21667, 33-47664, 33-51178, 33-52621, 33-66136, 33-62314, 33-65352, 333-38795, 333-38797 and 333-68863) and on Form S-3 (Registration Nos. 333-63423 and 333-29225) of our report dated November 12, 2002, relating to our audits of the consolidated financial statements of Hercules GB Holdings Limited and subsidiaries as of December 31, 2001 and December 31, 2000 and for each of the three years in the period ended December 31, 2001, which report is included in this Form 10-K/A. /s/ PricewaterhouseCoopers Accountants N.V. Amsterdam, The Netherlands December 11, 2002