Patent ID: 8609797

Claim:
A sealant composition comprising organosiloxane polymeric units having at least one terminal moiety according to Formula I: wherein Q is R is independently selected from a branched or straight chain C 1 -C 8 alkyl or alkoxy, C 3 -C 6 cylcoalkyl, C 2 -C 5 alkenyl, or aryl, and n is 2 or 3, wherein said organosiloxane polymeric units are reaction products of: (I) a hydroxyl end-capped organosiloxane having a structure according to Formula II(b): wherein R 1 and R 2 are independently selected from methyl, ethyl, propyl, butyl, phenyl, methylphenyl, ethylphenyl, vinyl, allyl, cyclohexyl, tolyl, isopropyl, chloropropyl, 3,3,3-trifluoropropyl, chlorophenyl, beta-(perfluorobutyl)ethyl, and chlorocyclohexyl, and N is a number such that the hydroxyl end-capped organosiloxanes have a viscosity from about 2000 to about 150,000 centipoise at 25° C. and (II) a silane cross-linking agent comprising a compound according to Formula III: wherein R is as defined above in Formula I and n is 3 or 4; wherein the sealant composition further comprises: a catalyst that is present in an amount from 0.001 to 1.0% in the composition.