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. Behold the power of Hercules, products built to last and trusted by plumbers to withstand even the toughest conditions.