Aerosil R 974 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 R974 is a hydrophobic fumed silica after treated with dimethylchlorosilane). Used in adhesives and silicone sealants. hydrophobic component for tickening and reinforcement of RTV 1 pack 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 Due to large surface area improved thickening and thixotropix effect as well as transparency Hydrophobic, water resistant, fumed silica. Used in adhesives and sealants. Has a thickening and reinforcement behaviour and improves shelf life in silicone sealants.