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

Dow DOWSIL 3-4118 Gel Kit

Dow DOWSIL 3-4118 Gel Kit is a two-part silicone elastomer system from Dow’s DOWSIL™ portfolio, designed for precision potting and encapsulation. It offers low viscosity, excellent flow, thermal stability, and electrical insulation. Ideal for electronics protection, it cures at room temperature to a soft, resilient gel with low stress on sensitive components.
  • dow dowsil 3 4118 gel kit_15fad808
  • dow dowsil 3 4118 gel kit_15fad808

Features Of Dow DOWSIL 3-4118 Gel Kit

  1. Two-part, platinum-cured silicone gel system offering ultra-low modulus and exceptional conformability for delicate electronic components.

  2. Self-healing properties enable recovery after mechanical stress, maintaining long-term protection and interface integrity.

  3. Non-corrosive formulation with low ionic impurities, suitable for high-reliability applications in aerospace and medical electronics.

  4. Room-temperature or elevated-temperature cure options provide processing flexibility without compromising gel performance.

  5. Excellent thermal stability over -50 °C to +200 °C continuous service range with minimal compression set.

Typical Applications Of Dow DOWSIL 3-4118 Gel Kit

  1. Thermal interface material (TIM) for power modules, IGBTs, and LED assemblies.

  2. Encapsulation and cushioning of sensitive sensors, MEMS devices, and flexible printed circuits (FPCs).

  3. Die-attach and underfill replacement in miniaturized automotive electronics and ADAS systems.

  4. Conformal coating alternative for irregular surfaces requiring zero-stress mechanical protection.

  5. Protection of battery management system (BMS) components in EV and energy storage applications.

Specifications Of Dow DOWSIL 3-4118 Gel Kit

Chemical TypePlatinum-cured addition-cure silicone gel
Product FormTwo-component kit (Part A: base; Part B: catalyst)
AppearanceTranslucent, viscous liquid (Part A); translucent, low-viscosity liquid (Part B)
Mix Ratio by Weight10:1 (A:B)
Cure MechanismPlatinum-catalyzed hydrosilylation
Shore A Hardness (Cured)5–10
Density (25 °C)Approx. 1.15 g/cm³
Primary ApplicationsThermal management, stress-relief encapsulation, and protective potting


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