EVONIK CORPORATION › AEROSIL® R 974 AEROSIL® R 974 $0.00 AEROSIL® R 974 is a hydrophobic-fumed silica after treated with DDS (dimethyldichloro/silane). Add To Cart Added! AEROSIL® R 974 is a hydrophobic-fumed silica after treated with DDS (dimethyldichloro/silane). You Might Also Like AEROSIL® RX 50 AEROSIL® R 805 AEROSIL® R 711 AEROSIL® 200 F AEROSIL® R 812
