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® RA 200 HS AEROSIL® R 208 AEROSIL® 200 V AEROSIL® R 711 AEROSIL® R 202