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® 300 AEROSIL® R 106 AEROSIL® 300 V AEROSIL® R 812 S AEROSIL® OX 50