300ml Heavy Body Gasket Maker is a one-part neutral cure silicone sealant with high-temperature resistance that cures in the presence of atmospheric moisture to produce a durable and flexible silicone rubber compound. 300ml Heavy Body Gasket Maker is the most advanced, high-temperature RTV silicone gasket. These are oil resistant and more flexible than cut gaskets. It is sensor safe, has a low odour and is non-corrosive with superior adhesive properties.