Gasiola Soft-Set is a smooth, non-toxic, odor-free paste that forms a non-hardening, positive seal on pipe threads, joints fittings, hoses, nozzles, LPG cylinders, pump assemblies, oil burners, hydraulics, etc. Sealed joints are easily taken apart without damaging threads. Federal Process Soft-Set Sealants can be used on brass copper, stainless steel, aluminum, black pipe, tin, galvanized, ABS, CPVC, PVC plastics, nylon and more. Excellent resistance to gasoline, petroleum solvents, kerosene, diesel oil, propane, butane, LPG, acids, compressed air (not oxygen) and much more. Non-toxic, non-corrosive, non-radioactive, non-explosive. Contains no lead. UL-Approved.