Oatey 14 oz. Ultra Plumbers Putty for Stainless Steel. This Ultra professional grade Plumber's Putty that is safe for most types of plumbing fixtures and surfaces. These surfaces include natural, porous surfaces such as marble, granite, plastics, rubber, and fiberglass, as well as grout and sinks. flexible. This Ultra Putty will not crumble, dry out, or shrink. Doesn't leave a greasy residue on hands or surfaces.