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

Dow DOWSIL 3-6651 Thermally Conductive Elastomer

Dow DOWSIL 3-6651 is a thermally conductive elastomer offering exceptional thermal management, electrical insulation, and conformal cushioning for power electronics. Part of Dow’s DOWSIL™ silicone portfolio, it features low compression set, wide operating temperature range (−40°C to 200°C), and easy dispensing. Ideal for EV battery modules, IGBTs, and LED lighting where reliability and thermal performance are critical.
  • dow dowsil 3 6651 thermally conductive elastomer_72b68593
  • dow dowsil 3 6651 thermally conductive elastomer_72b68593

Features Of Dow DOWSIL 3-6651 Thermally Conductive Elastomer

  1. High thermal conductivity (1.5 W/m·K) combined with elastomeric compliance for low interfacial resistance.

  2. Excellent long-term stability under thermal cycling and elevated temperature exposure (up to 200 °C continuous).

  3. Electrically insulating formulation—prevents short circuits while enabling efficient heat dissipation.

  4. Soft, conformable silicone elastomer that accommodates dimensional variation and surface irregularities.

  5. Ready-to-use, two-part addition-cure system with low mixed viscosity and extended pot life.

Typical Applications Of Dow DOWSIL 3-6651 Thermally Conductive Elastomer

  1. Thermal interface material (TIM) between power electronics modules and heat sinks in EV inverters.

  2. Heat transfer pads for high-power LED lighting assemblies requiring vibration damping and thermal management.

  3. Conformal gap-filling elastomer for battery module cell-to-cold-plate interfaces in energy storage systems.

  4. Thermal management solution for 5G base station RF power amplifiers and mmWave antenna units.

Specifications Of Dow DOWSIL 3-6651 Thermally Conductive Elastomer

Chemical TypePlatinum-catalyzed addition-cure silicone elastomer
Product FormTwo-component liquid (Part A + Part B)
AppearanceOpaque gray paste (Part A), translucent amber liquid (Part B)
Primary ApplicationsThermal interface material (TIM) for power electronics and LED systems
Key FeaturesElectrically insulating, thermally conductive, compliant, low-stress cure
BenefitsReduces thermal resistance, absorbs mechanical stress, eliminates need for mechanical fasteners
Cure SystemAddition-cure (no by-products); typical full cure at 150 °C for 30 minutes
Storage Stability12 months at ≤25 °C (unopened containers)


Get in Touch with ERICW
Let competitive chemical materials go global.

Your Name *

Your Email *

Your Phone

Country

Your Message *