Permatex Anaerobic Gasket Maker is a noncorrosive gasketing material designed primarily for use on aluminum, iron, and steel flanged mating surfaces. Ideal for on-the-spot and emergency repairs, or when a conventional gasket is unavailable. Fills gaps up to .015? and cures to a solvent-resistant seal that will not tear or decay during service. Parts disassemble easily even after extended service.