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

Wacker SEMICOSIL 961 TC A B Two-Component Silicone Rubber

Wacker SEMICOSIL 961 TC A/B is a two-component addition-cure silicone rubber offering excellent thermal conductivity (1.5 W/mK), low viscosity, and outstanding electrical insulation. It cures at room temperature or accelerated with heat, delivering high elasticity, aging resistance, and adhesion to metals/plastics—ideal for EV battery thermal management and power electronics encapsulation.
  • wacker semicosil 961 tc a b two component silicone rubber_f938ac0c
  • wacker semicosil 961 tc a b two component silicone rubber_f938ac0c

Features Of Wacker SEMICOSIL 961 TC A B Two-Component Silicone Rubber

  1. High thermal conductivity (≥1.5 W/m·K) for efficient heat dissipation in electronic assemblies.

  2. Excellent electrical insulation properties with volume resistivity >1×10¹⁴ Ω·cm.

  3. Platinum-catalyzed addition cure system offering low shrinkage and precise dimensional stability.

  4. Self-adhesive to common substrates including aluminum, copper, and FR-4 PCBs without primer.

  5. UL 94 V-0 rated flame retardancy for enhanced safety in demanding environments.

Typical Applications Of Wacker SEMICOSIL 961 TC A B Two-Component Silicone Rubber

  1. Thermal interface material (TIM) for power electronics and IGBT modules.

  2. Encapsulation and potting of LED drivers and automotive control units.

  3. Gap-filling adhesive for battery module thermal management systems.

  4. Die-attach and underfill in high-power semiconductor packaging.

  5. Thermally conductive bonding in renewable energy inverters and solar charge controllers.

Specifications Of Wacker SEMICOSIL 961 TC A B Two-Component Silicone Rubber

Chemical TypePlatinum-catalyzed addition-cure silicone rubber
Product FormTwo-component liquid system (Part A + Part B)
AppearanceOpaque gray paste (Part A), translucent gray paste (Part B)
Mixing Ratio (by weight)1:1 (A:B)
Cure Temperature Range25–150 °C (room temperature cure possible with extended time)
Shore A Hardness (cured)55–65
Primary ApplicationsThermal interface materials, encapsulation, bonding, gap filling
Key FeaturesHigh thermal conductivity, electrically insulating, self-adhesive, flame retardant


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