A sizing composition for glass fibers comprises at least one film-former, at
least
one silane comprising an alkenyl group comprising a straight chain segment of at
least five carbon atoms, wherein at least one carbon-carbon double bond is terminal
and wherein the carbon atoms on the terminal double bond are unsubstituted, and
at least one lubricant. The sizing composition can be used to coat glass fibers
for use as reinforcement for cycloolefins that cure by the ring-opening metathesis
polymerization ("ROMP") reaction.
