Permatex 80338 Black Rubber Sealant High-strength, ready-to-use adhesive insulates, seals and caulks. Does not dry out or become brittle. Economical black sealant. Permatex 80338 Black Rubber Sealant Features: Use on windshields, gaskets and electrical insulations Withstands heat, cold, moisture Contains silicones Seals, insulates Waterpr...