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

Wacker SEMICOSIL 961 TC Silicone Rubber

Wacker SEMICOSIL 961 TC is a thermally conductive, two-component addition-curing silicone rubber designed for encapsulation and potting of power electronics. It offers excellent thermal conductivity (~1.5 W/mK), low viscosity, high adhesion to substrates, and UL 94 V-0 flame retardancy. Ideal for EV inverters, LED drivers, and IGBT modules requiring reliable heat dissipation and long-term stability.
  • wacker semicosil 961 tc silicone rubber_bf9374c9
  • wacker semicosil 961 tc silicone rubber_bf9374c9

Features Of Wacker SEMICOSIL 961 TC Silicone Rubber

  1. High thermal conductivity for efficient heat dissipation in electronic components.

  2. Excellent electrical insulation properties combined with thermal management capability.

  3. Low modulus and high elasticity ensure stress relief and long-term reliability under thermal cycling.

  4. Platinum-catalyzed addition-cure system enables precise, reproducible processing without by-products.

  5. Good adhesion to common substrates including metals, ceramics, and plastics without primers.

Typical Applications Of Wacker SEMICOSIL 961 TC Silicone Rubber

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

  2. Encapsulation and potting of IGBTs, MOSFETs, and other high-power semiconductor devices.

  3. Gap-filling material between heat sinks and electronic components in automotive ECUs.

  4. Dielectric thermal padding in renewable energy inverters and battery management systems.

  5. Underfill and conformal coating for thermally sensitive sensors and control units.

Specifications Of Wacker SEMICOSIL 961 TC Silicone Rubber

Chemical TypePlatinum-catalyzed addition-curing silicone rubber
Product FormTwo-component liquid system (Part A + Part B)
AppearanceOpaque, off-white to light gray paste
Primary ApplicationsThermal interface materials, encapsulation, and gap filling
Key FeaturesHigh thermal conductivity, electrically insulating, low compression set
BenefitsImproved device lifetime, reduced thermal resistance, process stability
Curing MechanismAddition reaction (no volatile by-products)
Storage ConditionsStore at 5–25 °C; protect from moisture and direct sunlight


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