EVONIK CORPORATION › AEROSIL® R 972 AEROSIL® R 972 $0.00 AEROSIL® R 972 is a fumed silica after treated with DDS (dimethyldichloro-silane). It is suitable for a broad range of applications. Add To Cart Added! AEROSIL® R 972 is a fumed silica after treated with DDS (dimethyldichloro-silane). It is suitable for a broad range of applications. You Might Also Like AEROSIL® 200 AEROSIL® R 7200 AEROSIL® 300 AEROSIL® 380 AEROSIL® R 816