AEROSIL 380 Hydrophilic fumed silica 7631-86-9 Degussa-Silanes Rheology Modifier/ Thickener Coatings Inks AEROSIL® 380 is a hydrophilic fumed silica with a specific surface area of 380 m²/g. It possesses rheology and thixotropy control of liquids, binders, polymers, etc, the highest surface area resulting in best thickening and thixotropy, reinforcement of HTV-silicone rubber, excellent transparency in unsaturated polyester resins. It is used in paints and coatings, HTV-silicone rubber, cable compounds and unsaturated polyester resins, adhesives and sealants, printing inks. Hydrophilic fumed silica. Used in paints and coatings, HTV-silicone rubber, cable compounds and unsaturated polyester resins, adhesives and sealants, printing inks. Possesses rheology and thixotropy control of liquids.