Call it the plumbing industry's only "bulletproof" thread sealant. Megaloc Thread Sealant features Dupont Kevlar in its formula. That's one part of what makes Megaloc the highest performing thread sealant on the market. It can be used on CPVC. ABS, steel, stainless steel, brass, copper, aluminum and plastics. Plumbers have come to trust the Hercules offering to provide the highest quality thread sealants and other plumbing products.