WM Harvey 043010 Professional Grade Plumber’s Putty, 14 oz, Off-White by Best Art Supplies Buy Now amazon.comDescriptionWill not support bacteria Meets Federal Specification TT-P-1536A For these applications we recommend Harvey's Siliconized Tub Seal Latex or 100% RTV Silicone Do not use on marble, synthetic marble, other porous surfaces or on plastic lavatories and fixtures