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® R 972 AEROSIL® OX 50 AEROSIL® R 974 AEROSIL® RX 200 AEROSIL® R 202