Black Gasket Maker Flexible high-temperature resistant, watertight filling and bonding material. It is a polysiloxane based product in a pressure cartridge for making seals and gaskets in a rapid and easy way. Is resistant to oils, transmission fluids, water, antifreeze, grease, smoke and hot toxic gases. Replaces cork, felt, paper and rubber gaskets. Withstands low temperatures up to -50°C (continuous)and high temperatures up to 250°C Short Term Exposure +300°C Does not harm catalytic converters and electronic sensors. Ideal for replacing seals and gaskets of engine components (cylinder-head cover, transmission and oil crankcase, water pumps, thermostats), light fittings, heating installations, AC, bodywork, industrial ovens, cooking stoves, window seals and .