Guangzhou Eric Wei Chemical Co., Ltd.
Guangzhou Eric Wei Chemical Co., Ltd.

​Evonik Ultrasil AS 7 Precipitated Silica

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.

Features Of Evonik Ultrasil 5000 GR Precipitated Silica

  1. Ultra-high dispersion – fast mixing, uniform dispersion, dust-free

  2. Low compound viscosity – excellent flow even at high filler loading

  3. Strong mechanical reinforcement – improves tensile, tear, abrasion and resilience

  4. Excellent dynamic performance – lower rolling resistance, better low-temperature behavior

  5. Granulated dust-free – smooth feeding, eco-friendly, automated line suitable

Typical Applications Of Evonik Ultrasil 5000 GR Precipitated Silica

  1. Green tire tread – passenger car tires, winter tires, better wet grip & rolling resistance

  2. Tire sidewall/bead – higher strength, flex and aging resistance

  3. High-performance rubber goods – dampers, seals, hoses, belts

  4. Rubber shoe soles – improved abrasion, resilience and appearance

  5. EPDM/SBR/NR compounds – efficient reinforcement for general & special rubber

Specifications Of Evonik Ultrasil 5000 GR Precipitated Silica

BrandEvonik (Original German)
Product TypeHighly Dispersible Granulated Precipitated Silica
AppearanceWhite granule
BET Surface Area115 m²/g
CTAB Surface Area110 m²/g
Loss on Drying5.5–6.5%
pH Value (5%)5.5–7.5
SiO₂ Content≥97%



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