EVONIK CORPORATION › AEROSIL® R 805 AEROSIL® R 805 $0.00 AEROSIL® R 805 is a fumed silica after treated with organo-silane. It provides utmost transparency. Add To Cart Added! AEROSIL® R 805 is a fumed silica after treated with organo-silane. It provides utmost transparency. You Might Also Like AEROSIL® R 202 AEROSIL® R 711 AEROSIL® R 816 AEROSIL® 300 V AEROSIL® TT 600