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

Dow SYLGARD 3-6605 Thermal Conductive Elastomer

Dow SYLGARD 3-6605 Thermal Conductive Elastomer is a silicone-based gap-filling material offering excellent thermal conductivity (1.5 W/m·K), low compression force, and long-term reliability for EV battery modules and power electronics. It cures at room temperature or accelerated heat, maintains elasticity after curing, and resists pump-out under thermal cycling.
  • dow sylgard 3 6605 thermal conductive elastomer_91aa8e96
  • dow sylgard 3 6605 thermal conductive elastomer_91aa8e96

Features Of Dow SYLGARD 3-6605 Thermal Conductive Elastomer

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

  2. Soft, conformable silicone elastomer formulation enabling low-stress interface with sensitive components.

  3. Excellent long-term reliability under thermal cycling and humidity exposure per industry-standard JEDEC conditions.

  4. Non-silicone-oil bleeding design to prevent contamination of optical surfaces and adjacent electronics.

  5. Room-temperature curable with optional heat-accelerated cure, supporting flexible manufacturing integration.

Typical Applications Of Dow SYLGARD 3-6605 Thermal Conductive Elastomer

  1. Thermal interface material (TIM) for power modules in electric vehicle inverters and onboard chargers.

  2. Heat transfer pad between IGBTs, MOSFETs, and heatsinks in industrial motor drives and renewable energy converters.

  3. Conformal thermal coupling for high-power LED arrays in automotive lighting and outdoor signage.

  4. Die-attach alternative for thermally sensitive sensors and RF power amplifiers in 5G infrastructure equipment.

  5. Gap-filling solution for irregular or warped surfaces in battery management system (BMS) control boards.

Specifications Of Dow SYLGARD 3-6605 Thermal Conductive Elastomer

Chemical TypePlatinum-cured addition-cure silicone elastomer
Product FormTwo-part liquid (Part A + Part B), mix ratio 1:1 by weight
AppearanceOpaque gray paste (Part A), translucent gray paste (Part B)
Primary ApplicationsThermal interface material (TIM) for power electronics and LED systems
Key FeaturesThermally conductive, electrically insulating, low modulus, non-corrosive
Shore A Hardness (7 days, 25°C)25–30
Density (25°C)2.0–2.2 g/cm³
UL RecognitionUL 94 V-0 (thickness ≥0.5 mm)


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