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

Evonik Sipernat 298 Precipitation Silica

Sipernat 298 is a hydrophilic milled precipitated silica imported from Germany. Designed for high‑grade silicone rubber and sealants, it features high specific surface area and excellent rheology control, efficiently reinforcing HTV/LSR/RTV‑2C, stabilizing viscosity and thixotropy, and acting as carrier, anti‑caking and functional filler.

Features Of Evonik Sipernat 298 Precipitation Silica

  1. High surface area reinforcement - Outstanding mechanical strength improvement

  2. Precise rheology control - Stabilizes thixotropy and viscosity

  3. Fine grinding & easy dispersion - Uniform particle, no white spots

  4. Multi-scene adaptation - For silicone rubber, sealants, powder carrier

  5. Excellent processability - Non-sticky, easy demolding

Typical Applications Of Evonik Sipernat 298 Precipitation Silica

  1. HTV silicone rubber - High reinforcement & rheology stability

  2. LSR silicone rubber - Better mechanical & flow properties

  3. RTV‑2C silicone rubber - Higher strength & longer pot life

  4. Sealants & adhesives - Rheology control & anti-sagging

  5. Powder industry - Anti-caking, flow aid & liquid carrier

Specifications Of Evonik Sipernat 298 Precipitation Silica

Product TypeHydrophilic milled precipitated silica
AppearanceWhite powder
BET Surface Area175–215 m²/g
Median Particle Size D508.5–12.5 μm
Oil Absorption (DOA)210–240 mL/100g
pH Value6.0–8.0
Loss on Drying≤7.0%
SiO₂ Content≥98%


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