Ridgid thread cutting oils are free of chlorine and other halogens, PCBs and heavy metals. Complete material safety data sheet available. Endura-Clear is specially formulated to maximize wear resistance which increases die life up to 60% and significantly cuts operating costs up to 30% over Nu-Clear. The formulation has been tested to assure chemical compatibility with FlowGuard Gold, BlazeMaster, and Corzan pipe and fittings has been added to the FGG/BM/CZ System Compatible Program.