EVONIK CORPORATION › AEROSIL® R 816 AEROSIL® R 816 $0.00 AEROSIL® R 816 is a fumed silica after treated with hexadecyl-silane. Add To Cart Added! AEROSIL® R 816 is a fumed silica after treated with hexadecyl-silane. You Might Also Like AEROSIL® 200 VS AEROSIL® R 8200 AEROSIL® R 805 AEROSIL® R 711 AEROSIL® RA 200 HS