EPDM rubber is an addition curable compositions

PROBLEM TO BE SOLVED : To provide a composition enabling a molding cycle to be shortened.SOLUTION : The addition curable EPDM rubber composition contains : (A) an ethylene α-olefin non-conjugated polyene copolymer containing at least one non-conjugated polyene selected from norbornene compounds containing a terminal vinyl group represented by formula (1) and formula (2) where n is 0-10, Rand Rare H or an alkyl group, and Ris H or an alkyl group; (B) organohydrogenpolysiloxane containing at least 2 Si-bonded hydrogens and having an alicyclic alkyl group at a side chain; and (C) a hydrosilylation catalyst.SELECTED DRAWING : None