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

Dow DOWSIL 3-4207 Dielectric Gel Kit

Dow DOWSIL 3-4207 Dielectric Gel Kit is a two-part silicone-based insulating gel system designed for high-voltage electrical encapsulation and thermal management. It offers excellent dielectric strength, low viscosity for easy dispensing, and stable performance across -40°C to 200°C. Ideal for EV battery modules, power electronics, and renewable energy systems.
  • dow dowsil 3 4207 dielectric gel kit_bb26f162
  • dow dowsil 3 4207 dielectric gel kit_bb26f162

Features Of Dow DOWSIL 3-4207 Dielectric Gel Kit

  1. Non-corrosive, silicone-based formulation designed for long-term reliability in sensitive electronic assemblies.

  2. Ultra-low modulus provides stress relief and accommodates thermal expansion mismatch between components and substrates.

  3. Excellent dielectric strength (>20 kV/mm) and stable electrical insulation performance across wide temperature and humidity ranges.

  4. Thixotropic behavior enables easy dispensing and prevents slumping or migration after application.

  5. UL 94 V-0 rated for flame resistance, supporting compliance with stringent safety standards.

Typical Applications Of Dow DOWSIL 3-4207 Dielectric Gel Kit

  1. Thermal interface material (TIM) for power electronics, including IGBT modules and EV inverters.

  2. Dielectric encapsulation and potting of high-voltage sensors, battery management systems (BMS), and charging interfaces.

  3. Gap-filling insulation in LED lighting drivers and solid-state relays where vibration resistance is critical.

  4. Protection of fine-pitch connectors and flex circuit assemblies in automotive ADAS and infotainment systems.

Specifications Of Dow DOWSIL 3-4207 Dielectric Gel Kit

Chemical TypeDimethyl silicone polymer with fumed silica reinforcement
Product FormTwo-component kit (Part A: base gel; Part B: platinum-cure catalyst)
AppearanceOpaque off-white viscous gel (Part A); colorless to pale yellow liquid (Part B)
Mixed Viscosity (25°C)~150,000–200,000 cP (Brookfield, spindle #7, 2 rpm)
Cure SystemPt-catalyzed hydrosilylation (room temperature cure with optional heat acceleration)
Operating Temperature Range−50°C to +200°C (continuous)
Density (Mixed, 25°C)~1.12 g/cm³
Shelf Life (Unopened, 25°C)12 months for Part A; 6 months for Part B


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