A curable fluoroelastomer composition comprising: A) a polyhydroxy curable fluoroelastomer; B) a polyhydroxy curative; C) a cure accelerator; and D) an unsaturated metal compound process aid comprising (i) a siloxane of the formula: wherein R 1, R 2, R 3, R 6, R 7, R 8 and R 9 each independently represents an alkoxy group; an alkyl group optionally substituted with an aryl group, halide, an ester, or an alkoxy; an aryl group optionally substituted with an alkyl group, an ester, or an alkoxy; a vinyl group; or an allyl group, R 4 and R 5 each independently represents an alkoxy group, an alkyl or aryl group each of which may optionally be substituted, R 10 is a vinyl or allyl group, x represents a value of 0 to 150, y represents a value of 0 to 150, and with the proviso that when x=0, at least one of R 1, R 2, R 3, R 6, R 7, R 8 and R 9 represents a vinyl or allyl group, or (ii) vinyldiphenylethoxysilane, allyltrimethoxysilane or vinyltriphenoxysilane. A) a polyhydroxy curable fluoroelastomer; B) a polyhydroxy curative; C) a cure accelerator; and D) an unsaturated metal compound process aid comprising (i) a siloxane of the formula: wherein R 1, R 2, R 3, R 6, R 7, R 8 and R 9 each independently represents an alkoxy group; an alkyl group optionally substituted with an aryl group, halide, an ester, or an alkoxy; an aryl group optionally substituted with an alkyl group, an ester, or an alkoxy; a vinyl group; or an allyl group, R 4 and R 5 each independently represents an alkoxy group, an alkyl or aryl group each of which may optionally be substituted, R 10 is a vinyl or allyl group, x represents a value of 0 to 150, y represents a value of 0 to 150, and with the proviso that when x=0, at least one of R 1, R 2, R 3, R 6, R 7, R 8 and R 9 represents a vinyl or allyl group, or (ii) vinyldiphenylethoxysilane, allyltrimethoxysilane or vinyltriphenoxysilane. (i) a siloxane of the formula: wherein R 1, R 2, R 3, R 6, R 7, R 8 and R 9 each independently represents an alkoxy group; an alkyl group optionally substituted with an aryl group, halide, an ester, or an alkoxy; an aryl group optionally substituted with an alkyl group, an ester, or an alkoxy; a vinyl group; or an allyl group, R 4 and R 5 each independently represents an alkoxy group, an alkyl or aryl group each of which may optionally be substituted, R 10 is a vinyl or allyl group, x represents a value of 0 to 150, y represents a value of 0 to 150, and with the proviso that when x=0, at least one of R 1, R 2, R 3, R 6, R 7, R 8 and R 9 represents a vinyl or allyl group, or R 1, R 2, R 3, R 6, R 7, R 8 and R 9 each independently represents an alkoxy group; an alkyl group optionally substituted with an aryl group, halide, an ester, or an alkoxy; an aryl group optionally substituted with an alkyl group, an ester, or an alkoxy; a vinyl group; or an allyl group, R 4 and R 5 each independently represents an alkoxy group, an alkyl or aryl group each of which may optionally be substituted, R 10 is a vinyl or allyl group, x represents a value of 0 to 150, y represents a value of 0 to 150, and with the proviso that when x=0, at least one of R 1, R 2, R 3, R 6, R 7, R 8 and R 9 represents a vinyl or allyl group, or (ii) vinyldiphenylethoxysilane, allyltrimethoxysilane or vinyltriphenoxysilane.