Aerosil COK 84 Fumed silica Degussa Extenders / Fillers >> Silica Rheology Modifiers / Thickeners >> Mineral >> Fumed Silica Acrylics/ Acrylates PU - Prepolymers ADHESIVE >> Water-based Aerosil COK 84 fumed silica. Used in adhesives Effect : anti-sag, thixotropy, anti-settling, resistance to moisture acrylate, methyl acrylate, water-based polyurethane and acrylate adhesives Fumed silica. Used in acrylate, methyl acrylate, water-based polyurethane and acrylate adhesives. Provides anti-sagging, thixotropic, anti-settling effects and resistance to moisture.