Patent ID: 7199198

Claim:
A fluororubber sealant composition comprising: 100 parts by weight of a fluororubber, which is a copolymer having a crosslinking site derived from a bromine-containing and/or iodine-containing compound, capable of crosslinking with peroxide and having a component unit composition comprising; (a) 20.5 to 22.5% by mol of a perfluoromethyl vinylether component unit, (b) 60 to 70% by mol of a vinylidene fluoride component unit, (c) 10 to 20% by mol of a tetrafluoroethylene component unit, (d) 0 to 10% by mol of hexafluoropropylene component unit (based on 100% by mol of the total of the component units (a) to (d)), and (e) a small amount of a bromide and/or iodide unsaturated fluorohydrocarbon component unit as a crosslinking site based on 100% by mol of the total of the component units (a) to (d); and, based on 100 parts by weight of the fluororubber, 2 to 50 parts by weight of a bituminous fine powder; 0.5 to 6 parts by weight of an organoperoxide; and 1 to 10 parts by weight of a polyfunctional monomer.