1.Size small 2.High specific surface area 3.High purity 4.Surface chemical 5.hydrophobic Yushuntong fumed silica Yushuntong fumed silica has size small, super specific surface area, high purity ,etc. It show superior properties, dispersion, reinforcing sex, thickening sex, thixotropy, electrical insulation, etc. Yushuntong fumed silica is mainly used for Silicone Rubber ,Adhesives, Sealants, ...