Aerosil R 8200 Fumed silica Degussa Extenders / Fillers >> Silica Rheology Modifiers / Thickeners >> Mineral >> Fumed Silica Polyamides (PA) Polyesters Silicones (Si) PU - Prepolymers SEALANT ADHESIVE >> Hot-melt Aerosil R 812 S fumed silica. Used in adhesives and sealants Effect : anti-sag, thixotropy, self-leveling, reinforcement. polyester, polyamide and polyurethane hotmelt adhesives, 1-K and 2-K silicone and MS/SMP/SPU sealants. Fumed silica. Used in polyester, polyamide and polyurethane hotmelt adhesives, 1-K and 2-K silicone and MS/SMP/SPU sealants. Provides anti-sagging, thixotropic, self-leveling effects and reinforcement.