Heat curable fluorosilicone coating composition

A curable liquid composition exhibiting a viscosity of from 0.01 to 10 Pa.s at 25.degree. C., said composition comprising the product obtained by blending to homogeneity

• (a) a fluorosilicone gum exhibiting a Williams plasticity number of from 120 to 400 at 25.degree. C., where at least 75 mole percent of the repeating units of said gum correspond to the formula MeRfSiO, Me represents methyl, Rf represents a perfluoroalkylethyl radical containing a total of from 3 to 10 carbon atoms, any remaining units are individually selected from the group consisting of dimethylsiloxane and methylvinylsiloxane units, and the gum contains from 0.3 to 3 mole percent of silicon-bonded vinyl radicals;
• (b) an organohydrogensiloxane containing an average of at least 3 silicon-bonded hydrogen atoms per molecule in an amount sufficient to cure said composition, where at least a portion of the silicon bonded hydrocarbon radicals present in said organohydrogensiloxane are represented by Rf;
• (c) a platinum-containing hydrosilation catalyst in an amount sufficient to promote curing of said composition;
• (d) from 1 to 25 percent by weight, based on the weight of said composition, of a finely divided reinforcing silica filler prepared by treating said filler with an effective amount of a siloxane of the general formula HO(MeRfSiO).sub.n H where the average value of n is from 3 to 12, and
• (e) a volatile solvent for (a), (b) and (c).