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

Shin-Etsu CH-3821 Silicone Rubber

Shin-Etsu CH-3821 Silicone Rubber is a high-consistency, heat-curable elastomer offering excellent mechanical strength, electrical insulation, and thermal stability up to 200°C. Designed for compression/injection molding, it delivers low compression set, superior tear resistance, and consistent vulcanization. Widely used in automotive seals, medical devices, and industrial gaskets due to its FDA-compliant formulation and reliable processability.
  • shin etsu ch 3821 silicone rubber_4e38e9d5
  • shin etsu ch 3821 silicone rubber_4e38e9d5

Features Of Shin-Etsu CH-3821 Silicone Rubber

  1. High-temperature resistance up to 200 °C continuous service

  2. Excellent compression set resistance for long-term sealing performance

  3. Good electrical insulation properties across wide temperature and frequency ranges

  4. Low volatility and minimal extractables, suitable for demanding environments

  5. Easy processing via extrusion and compression molding with consistent cure behavior

Typical Applications Of Shin-Etsu CH-3821 Silicone Rubber

  1. Automotive under-hood gaskets and vibration-damping bushings

  2. Industrial sealing components for pumps, valves, and compressors

  3. Electrical insulation sleeves and cable jacketing in power distribution systems

  4. Food-grade compliant seals for processing equipment (subject to regulatory approval)

  5. Medical device housings requiring biocompatibility and sterilization resistance

Specifications Of Shin-Etsu CH-3821 Silicone Rubber

Chemical TypeHigh-consistency silicone rubber (HCR), platinum-cured
Product FormUncured compound in roll or slab form
AppearancePale translucent to off-white, homogeneous elastomeric mass
Hardness (Shore A, ASTM D2240)60 ± 3
Tensile Strength (ASTM D412)≥ 7.0 MPa
Elongation at Break (ASTM D412)≥ 350 %
Density (ASTM D297)1.12–1.16 g/cm³
Volatile Content (ASTM D3451)≤ 0.5 wt%


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