Wacker HDK V15 Fumed silica Wacker Rheology Modifiers / Thickeners >> Mineral >> Fumed Silica Silicones (Si) ADHESIVE SEALANT Hydrophilic WACKER HDK® is produced by the introduction of volatile chlorosilanes into an oxyhydrogen flame. Chemically, fumed silica consists of ultrapure amorphous silicon dioxide and has the appearance of a light white powder. Hydrophilic fumed silica is wetted by water and also disperses in water. Hydrophilic WACKER HDK® is used as a thixotropic agent in coatings, printing inks, adhesives, UP resins, plastisols, or as a flow aid, for example in the cosmetics, pharmaceutical and food-processing industries. One of the most important properties of WACKER HDK® is its ability to increase viscosity and provide thixotropic effects. WACKER HDK® V15 Pyrogenic silica - Fumed Silica Synthetic, hydrophilic amorphous silica, produced via flame hydrolysis White colloidal powder of high purity WACKER HDK ® V15 is applied as thickening and thixotropic agent in silicone sealants. WACKER HDK ® V15 is used as reinforcing filler in elastomers, mainly silicone-elastomers. High purity, synthetic, hydrophilic amorphous silica. Used as a thickening and thixotropic agent in silicone sealants and in adhesives. Can be wetted by water.