Provided is a liquid silicone rubber coating composition, including predetermined quantities of (A) an organopolysiloxane containing 2 or more Si atom-bonded alkenyl groups, (B) an organohydrogenpolysiloxane containing 2 or more SiH groups, (C) an addition reaction catalyst, (D) a finely powdered silica with a specific surface area of at least 50 m.sup.2/g, (E) an organosilicon compound containing an epoxy group and a Si atom-bonded alkoxy group, and (F) an oxyzirconium compound. The composition is useful for producing a silicone rubber coating layer on the substrate surface of a curtain air bag. The air bag suppresses leakage of the inflator gas, thus enabling the inflation time to be sustained for a satisfactory period.