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

Evonik Sipernat 238 Precipitation Silica

Evonik Sipernat 238 is a medium particle size, medium absorption precipitated silica imported from Germany. It reinforces HTV, LSR, RTV‑2C silicone rubber, stabilizes viscosity, and provides excellent dispersion and processability for special carrier applications.

Features Of Evonik Sipernat 238 Precipitation Silica

  1. Balanced particle & absorption - Suitable for both reinforcement and carrier use

  2. Efficient silicone reinforcement - Improves tensile, tear strength and wear resistance

  3. Stable viscosity control - Stabilizes compound viscosity and extends processing time

  4. Easy dispersion & mixing - Finely ground, uniform dispersion without agglomeration

  5. High purity & low impurity - Stable quality for high‑end silicone application

Typical Applications Of Evonik Sipernat 238 Precipitation Silica

  1. HTV silicone rubber: Reinforcement, viscosity stabilization for seals and rubber rollers

  2. LSR silicone rubber: Improved mechanical properties and fluidity for precision silicone products

  3. RTV-2C silicone rubber: Strength enhancement and longer pot life for potting and sealing

  4. Special carrier systems: Stable loading for active ingredients in chemical and pharmaceutical fields

  5. Translucent silicone products: Achieve translucent and low-yellowing appearance

Specifications Of Evonik Sipernat 238 Precipitation Silica

Product TypeFinely ground synthetic precipitated silica
AppearanceWhite powder
BET Surface Area180–220 m²/g
Median Particle Size D509–13 μm
Oil Absorption190–230 mL/100g
pH Value6.0–8.0 (Neutral)
Loss on Drying≤7.0%
SiO₂ Content≥98%
CAS No.112926-00-8


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