Evonik Ultrasil AS 7 is original German imported precipitated sodium aluminum silicate. It acts as a medium-reinforcing filler for rubber, with excellent processability, high-load filling capacity and adjustable mechanical properties for mechanical rubber goods.
Excellent processability – smooth mixing, stable extrusion for all rubber molding
Medium reinforcement – balanced hardness, strength and resilience
High-filling compatible – high dosage without losing flow and performance
Flexible performance adjustment – blendable with VN3 or inert fillers
Chemically inert – good compatibility, no cure interference
Mechanical rubber goods – seals, dampers, pads, supports
Industrial rubber parts – rollers, hoses, belts, buffers
General rubber components – cost-effective high-filled compounds
Light-colored rubber products – white/color items reinforcement
Extrusion/molding parts – smooth surface and stable dimension
| Product Type | Precipitated Sodium Aluminum Silicate |
| Appearance | White powder |
| BET Surface Area | ~65 m²/g |
| SiO₂ Content | ≥98% |
| pH Value | 5.5–7.5 |
| Loss on Drying | ≤7.0% |
| CAS No. | 1344-00-9 |
| Packing | 25kg/barrel |
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