Permatex Anaerobic Gasket Maker - 50ml

When a conventional gasket is not available or you need a reliable formed-in-place seal on a rigid assembly, Permatex Anaerobic Gasket Maker fills that role. This 50ml tube of red, medium-strength sealant cures in the absence of air between close-fitting metal surfaces, forming a tough seal that resists solvents and will not tear or decay during service.

The anaerobic chemistry means it stays workable in the open air, giving you time to position parts correctly. Once the flanges are tightened and air is excluded, curing begins. It reaches handling strength in about four hours and full cure in 24 hours at 72 degrees F. The cured sealant handles temperatures from -65 to 300 degrees F and fills gaps up to 0.015 inches, making it suitable for aluminum, iron, and steel flanged surfaces where the mating surfaces are close but not perfect.

Disassembly later is straightforward — the medium-strength formula allows parts to be separated, and old material scrapes off cleanly with a putty knife. That makes it practical for service items like thermostat housings, water pump covers, and transmission pans where you may need to get back in.