Wacker HDK N20P Fumed silica Wacker Rheology Modifiers / Thickeners >> Mineral >> Fumed Silica Silicones (Si) ADHESIVE 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® N20P Pyrogenic silica - Fumed Silica Synthetic, hydrophilic amorphous silica, produced via flame hydrolysis White colloidal powder of high purity WACKER HDK ® N20P is used as reinforcing filler in elastomers, mainly silicone-elastomers. WACKER HDK ® N20P is used as thixotropic agent in the production of tooth pastes and sulfuric acid gel batteries. the designation P is used for mechanically densified HDK grades with increased bulk density High purity, mechanically densified, synthetic, hydrophilic amorphous silica. Used as a thixotropic agent in adhesives. Can be wetted by water. Offers increased bulk density.