Rectorseal 73831 Nickel-Rich, 1 lb.Rectorseal 73831 Nickel Rich is a harsh settings anti seize. Carrier volatizes at high temps., deposits nickel, prevents metal metal contact. Nuclear Grade won't poison reactor catalyst beds. For Class 1, 2, 3 non wetted use for aux. nuclear power plant equipment. Features Chemically inert and resists attack by acidic and caustic chemicals Contains no lead, copper, graphite, chlorides or other halogens, phosphorous, or silicones Prevents seizure