a silicone composition for a release agent , which comprises an organopolysiloxane having at least two alkenyl groups bonded to a silicon atom and at least one fluorine - containing substituent bonded to a silicon atom , in one molecule , and having a fluorine content of from 20 to 40 % by weight , an organohydrogenpolysiloxane having at least three hydrogen atoms bonded to a silicon atom in one molecule , a straight - chain perfluoropolyether anti - foaming agent , and a platinum group metal catalyst . even when the silicone composition is diluted with a non - fluorine - type solvent , it is possible to avoid foaming does not occur during roller coating . moreover , the silicone composition provides a cured coating which needs only a low peel force and hardly gives reduction in the residual adhesive ratio .