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. Wynns Gasket Maker Power Can - Black 200ml Aerosol - Self Curing - 57680. Self curing, silicone based adhesive gasket maker forms gaskets for sealing metal components. It is resistant to oils, transmission fluids, water, antifreeze, grease, smoke and hot toxic gas Replaces cork, felt, paper and rubber gaskets Withstands low temperatures up to -40 deg.C (continuous) and high temperatures up to 232 deg.C (continuous) and 260 deg.C (Intermittent) Does not harm catalytic converters and electronic sensors.