Permatex Anaerobic Gasket Makers Non-corrosive 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 0.015 inch. Cures to a solvent- seal that will not tear or decay during service. Parts disassemble easily even after extended service Pack of 1