EVONIK CORPORATION › AEROSIL® R 816 AEROSIL® R 816 $0.00 AEROSIL® R 816 is a fumed silica after treated with hexadecyl-silane. Quantity: Add To Cart Added! AEROSIL® R 816 is a fumed silica after treated with hexadecyl-silane. You Might Also Like AEROSIL® 300 AEROSIL® R 972 V AEROSIL® R 711 AEROSIL® R 972 AEROSIL® R 208