Aerosil 130 Silicium dioxide 112 945-52-5 Degussa Extenders / Fillers >> Silica Rheology Modifiers / Thickeners >> Mineral >> Fumed Silica Rubber - Elastomer (Chloroprene, Butyl …) Silicones (Si) SEALANT Aerosil 130 is a hydrophilic fumed silica. Has a reinforcement and thixotropic behaviour in sealants. Improved reinforcing properties in HCR-silicone rubber. Used in sealants. Hydrophilic fumed silica. Has a reinforcement and thixotropic behaviour in sealants.