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

Dow DOWSIL TC-4025 Silicone Rubber

Dow DOWSIL TC-4025 Silicone Rubber is a two-part, addition-cure liquid silicone rubber offering excellent flow, low viscosity, and high thermal conductivity (2.5 W/mK). Ideal for potting, encapsulation, and thermal interface applications requiring reliability under thermal cycling and electrical insulation.
  • dow dowsil tc 4025 silicone rubber_e498c378
  • dow dowsil tc 4025 silicone rubber_e498c378

Features Of Dow DOWSIL TC-4025 Silicone Rubber

  1. High thermal conductivity (2.5 W/m·K) for efficient heat dissipation in demanding electronic assemblies.

  2. Excellent electrical insulation properties with low dielectric loss across wide temperature and frequency ranges.

  3. Ready-to-use two-part addition-cure formulation with low viscosity and excellent flowability for precise dispensing and void-free encapsulation.

  4. Outstanding long-term stability — maintains mechanical integrity and thermal performance after prolonged exposure to elevated temperatures (up to 200 °C).

  5. Low compression set and high elasticity, ensuring reliable sealing and stress relief on sensitive components over time.

Typical Applications Of Dow DOWSIL TC-4025 Silicone Rubber

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

  2. Encapsulation and potting of high-power electronics, including EV onboard chargers and DC-DC converters.

  3. Gap-filling pads and form-in-place gaskets for battery management systems (BMS) and energy storage units.

  4. Dielectric protection layer for automotive sensors operating under harsh under-hood conditions.

  5. Thermally conductive bonding and cushioning in renewable energy inverters and solar microinverters.

Specifications Of Dow DOWSIL TC-4025 Silicone Rubber

Chemical TypePlatinum-catalyzed addition-cure silicone elastomer
Product FormTwo-component liquid (Part A + Part B)
AppearanceOpaque off-white viscous liquid (Part A); translucent pale yellow liquid (Part B)
Primary ApplicationsThermal management, electrical insulation, vibration damping, and environmental sealing
Key FeaturesHigh thermal conductivity, low modulus, flame retardant (UL 94 V-0), RoHS compliant
Shore A Hardness (7 days @ 25 °C)35 ± 3
Cure Schedule20 min @ 100 °C or 24 h @ 25 °C
Storage Stability (unopened)12 months @ ≤25 °C (refrigeration recommended for extended shelf life)


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