EVONIK CORPORATION › AEROSIL® R 202 AEROSIL® R 202 $0.00 AEROSIL® R 202 is a fumed silica after treated with polydimethylsiloxane. Quantity: Add To Cart Added! AEROSIL® R 202 is a fumed silica after treated with polydimethylsiloxane. You Might Also Like AEROSIL® OX 50 AEROSIL® 200 AEROSIL® 150 AEROSIL® 130 AEROSIL® RX 50