for example str1 the amount of peresters to be used in the compositions of this invention is not critical and can be any amount that the combination the peresters and the inhibitors will retard the above described platinum catalyzed hydrosilylation reaction at room temperature while not preventing said reaction at moderately elevated temperature for example the range for component e can be 0 1 10 with 0 1 2 being preferred and 0 3 1 being most preferred the following examples are disclosed to further teach but not limit the invention which is properly delineated by the appended claims all amounts parts and percentages are by weight unless otherwise indicated viscosities were measured with a rotating spindle viscometer composition 1 was prepared by combining 10 parts of a 200 cps vinyl dimethyl silyl stopped polydimethyl siloxane polymer containing 25 ppm pt as a pt divinyltetramethyl disiloxane complex with 0 4 parts t butyl peroxybenzoate and 0 30 parts of a methyl hydrogen dimethyl polysiloxane crosslinker the resulting mixture gelled in about 60 mins composition 2 was the same as composition 1 except no t butyl peroxybenzoate was added to the system the resulting mixture gelled in less than three minutes composition 3 was the same as composition 1 except the mixture was allowed to stand at room temperature overnight before addition of the 0 30 parts of the methyl hydrogen dimethyl polysiloxane crosslinker the resulting mixture was a free flowing liquid for 5 hours the results clearly indicate that t butyl peroxybenzoate has a small amount of inhibitive capacity the following inhibitors were mixed with 100 0 g portions of a blend of a 200 cps vinyl dimethyl silyl stopped polydimethyl siloxane polymer and 150 ppm pt as a pt divinyltetramethyl disiloxane complex ______________________________________comp no inhibitor wt.