Abstract: A room temperature vulcanizing silicone rubber composition comprising a polyorganosiloxane terminated with silanol groups, an alkoxysilane of the formula R.sup.1 Si(OR.sup.2).sub.3 or its partially hydrolyzed condensate, colloidal calcium carbonate surface-treated with rosin acid, and a curing catalyst. This composition has excellent workability, and, after curing, becomes a high-strength, high-modulus rubber having excellent adhesion and resistance to humidity and hot water, and is useful as a sealing material for sealed insulating glass.

Abstract: A room temperature-curable silicone rubber composition comprising a polydiorganosiloxane having a silanol group at the both ends thereof, an organosilane or a partially hydrolyzed condensate thereof, an epoxyalkylalkoxysilane, and an organosilicon group-containing isocyanurate. The composition shows improved adhesive property to various materials and having excellent moisture resistance and hot water-resistant adhesive property, and is useful as a sealing material for various apparatuses and structures which are used in hot water or moist heat atmosphere.