EVONIK CORPORATION › AEROSIL® R 208 AEROSIL® R 208 $0.00 AEROSIL® R 208 is a fumed silica after treated with polydimethylsiloxane. Quantity: Add To Cart Added! AEROSIL® R 208 is a fumed silica after treated with polydimethylsiloxane. You Might Also Like AEROSIL® 130 AEROSIL® 200 V AEROSIL® R 805 AEROSIL® R 812 AEROSIL® R 816