Good Stability Hydrophilic Fumed Silica For Silicone Rubber Hydrophilic fumed silica DR-262 has good thickening&thixotropy properties,and stability in epoxy resin system products,high loading enables it great reinforce performance for polymers. Specification of matting agent Appearance White Powder Silica content (based on ignited material),% ≥99.8 Specific Surface Area(BET),m²/g 110±30 pH (4% suspension,water to methanol ratio 1:1) 4.0-7.0 Loss on drying*1 (105℃,2h) ≤0.7%