Silicone (Gasket maker) Rated to 750 degree Fahrenheit, Gray RTV Silicone, 85g tube, Oxygen sensor safe & is specially formulated for high temperature resistance, low volatile silicone for oxygen sensor turbocharged and high performance engines. It main features are low odour, non-corrosive with excellent oil resistance. Remain permanent flexible and stable from -80F to +750F (-62C to +399C) intermittent. Ideal for engine repairing and replacement for paper, rubber and normal silicone gaskets, such as rear main bearing cap split line, damper keyway sealing, oil pan gasket, side cover plate, thermostat housing, timing cover, transmission pan, valve cover gasket, vibration damper, intake manifolds and exhaust manifold.