Aerosil R 972 Silicium dioxide 60 842-32-2 Degussa Extenders / Fillers >> Silica Rheology Modifiers / Thickeners >> Mineral >> Fumed Silica Rubber - Elastomer (Chloroprene, Butyl …) Silicones (Si) ADHESIVE SEALANT Aerosil R972 is a hydrophobic fumed silica after treated with dimethylchlorosilane). Used in adhesives and silicone sealants. hydrophobic component for tickening and reinforcement of silicone sealants. improves shelf life of silicone sealants water resistant, hydrophobising of liquid systems rheology control of liquid systems improvement and maintenance of free flow and anti caking characteristics of powders Hydrophobic, water resistant, fumed silica after treated with dimethylchlorosilane. Used in adhesives and sealants. Has a thickening and reinforcement behaviour and improves shelf life in silicone sealants.