Hercules Megaloc is a multi-purpose thread sealant made with DuPont Kevlar for use on metals, including steel, stainless steel, brass, copper, aluminum and plastic. This pipe dope wipes clean from hands and tools with a dry rag and is safe to use with water lines. Its odorless formula is non-separating, non-flammable and non-hazardous, and resists hardening and cracking. Plumbers have come to trust the Hercules offering to provide the highest quality of plumbing products.