EVONIK CORPORATION › AEROSIL® R 202 AEROSIL® R 202 $0.00 AEROSIL® R 202 is a fumed silica after treated with polydimethylsiloxane. Add To Cart Added! AEROSIL® R 202 is a fumed silica after treated with polydimethylsiloxane. You Might Also Like AEROSIL® R 972 V AEROSIL® 300 V AEROSIL® R 812 AEROSIL® R 8200 AEROSIL® OX 50