Waterproof seealer for connectors

An oil-bleeding waterproof sealer for a connector comprising a vulcanized and molded article of a composition comprising:

• (A) 100 parts by weight of a diorganopolysiloxane green rubber containing at least two alkenyl groups bonded to silicon atoms per molecule thereof,
• (B) from 10 to 100 parts by weight per 100 parts by weight of component (A) of a reinforcing filler,
• (C) from 0.1 to 10 parts by weight per 100 parts by weight of component (A) of an organohydrogenopolysiloxane having at least two hydrogen atoms bonded to silicon atoms per molecule thereof,
• (D) from 1 to 30 parts by weight per 100 parts by weight of component (A) of a phenyl-containing diorganopolysiloxane having a viscosity of 1 to 3,000 cSt at 25.degree. C., and
• (E) a catalytic amount of a catalyst for hydrosilylation having a particle size of 0.01 to 20 .mu.m which comprises a platinum catalyst and a polycarbonate resin obtained from 2,2-bis(4-hydroxyphenyl)propane and having a glass transition point of from 50.degree. and 200.degree. C., with the proportion of metallic platinum in said catalyst for hydrosilylation being 0.01 to 5% by weight.