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

Wacker ELASTOSIL SC 870 A B Two-Component Silicone Rubber

Wacker ELASTOSIL SC 870 A/B is a two-component addition-curing silicone rubber offering excellent mechanical strength, thermal stability up to 200°C, and outstanding electrical insulation. Ideal for precision molding, encapsulation, and sealing in automotive, electronics, and medical device applications. Features low viscosity, long pot life, and rapid room-temperature or heat-cured vulcanization with no by-products.
  • wacker elastosil sc 870 a b two component silicone rubber_c280fda5
  • wacker elastosil sc 870 a b two component silicone rubber_c280fda5

Features Of Wacker ELASTOSIL SC 870 A B Two-Component Silicone Rubber

  1. Platinum-catalyzed addition-cure system ensuring low shrinkage and excellent dimensional stability.

  2. High transparency and exceptional clarity after curing, ideal for optical and aesthetic applications.

  3. Excellent biocompatibility and compliance with ISO 10993-5 and USP Class VI standards.

  4. Low viscosity components enable easy mixing, degassing, and mold filling—even in intricate geometries.

  5. Fast room-temperature or elevated-temperature cure profile with adjustable pot life via temperature control.

Typical Applications Of Wacker ELASTOSIL SC 870 A B Two-Component Silicone Rubber

  1. Medical device encapsulation and protective coatings for implantable and wearable sensors.

  2. Optical bonding and light-guide encapsulation in LED lighting and display modules.

  3. Soft-touch overmolding for precision electronics housings and human-interface components.

  4. Prototyping and low-volume production of transparent silicone parts using soft tooling.

  5. Sealing and gasketing in pharmaceutical processing equipment requiring chemical resistance and cleanability.

Specifications Of Wacker ELASTOSIL SC 870 A B Two-Component Silicone Rubber

Chemical TypePlatinum-catalyzed addition-cure silicone rubber
Product FormTwo-component liquid system (Part A + Part B)
Appearance (Uncured)Part A: Transparent, low-viscosity liquid; Part B: Transparent, low-viscosity liquid
Primary ApplicationsMedical devices, optical components, electronics encapsulation, soft-touch overmolding
Key FeaturesHigh transparency, biocompatible, low shrinkage, fast cure, excellent flow
ComplianceISO 10993-5 (cytotoxicity), USP Class VI, RoHS compliant
Shore A Hardness (Cured)~40–45 Shore A (7 days, 23 °C)
Processing Temperature Range23–80 °C (cure temperature); 15–30 °C (recommended mixing temperature)


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