OEM specified. Non-corrosive gasketing material designed primarily for use on aluminum, iron, and steel flanged mating surfaces. Ideal when a conventional gasket is unavailable (not for use with conventional gaskets). Fills gaps up to 3.8mm and cures to a solvent-resistant seal that will not tear or decay during service. Parts disassemble easily even after extended service. Old gasket material can be removed in minutes with the Permatex Safer Scraper.