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® OX 50 AEROSIL® RA 200 HS AEROSIL® 200 VS AEROSIL® R 106 AEROSIL® R 7200