Aktisil MAM quartz and kaolinite mixture coated with 3-methacryloxypropyltrimethoxy silane Hoffmann Mineral Extenders / Fillers >> Silica Extenders / Fillers >> Kaolin Rubber - Elastomer (Chloroprene, Butyl …) Silicones (Si) Polyolefins (PE, PP…) activated Sillitin produced by modifying the surface of Neuburg Siliceous Earth with chemicals, specifically with selected silanes. In comparison with untreated Neuburg Siliceous Earth, Aktisil through improved wetting by the polymer, offer manifold benefits in different fields of application. The by-products split off during the treatment reaction are largely removed during the production process which firmly attaches the silane to the filler surface. This helps minimize undesirable side effects, as they are potentially encountered with in-situ mixing direct addition of silane to the compound). Extender and filler used in polyolefins, silicon rubber and radiation cured systems. Activated sillitin. Filler used in polyolefins, silicon rubber and radiation cured systems.