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

Dow DOWSIL TC-4605 HLV Thermally Conductive Sealant

Dow DOWSIL TC-4605 HLV is a high-performance thermally conductive silicone sealant offering excellent heat dissipation, low viscosity for easy dispensing, and strong adhesion to metals/plastics. It cures to a flexible, electrically insulating elastomer with thermal conductivity of 0.8 W/mK, ideal for EV battery modules, power electronics, and LED lighting applications requiring reliable thermal management.
  • dow dowsil tc 4605 hlv thermally conductive sealant_2f436b7f
  • dow dowsil tc 4605 hlv thermally conductive sealant_2f436b7f

Features Of Dow DOWSIL TC-4605 HLV Thermally Conductive Sealant

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

  2. Low modulus silicone formulation enables stress relief and accommodates thermal expansion mismatch between substrates.

  3. Room-temperature vulcanizing (RTV) cure with excellent adhesion to metals, plastics, and ceramics without primer.

  4. UL 94 V-0 rated for flame resistance, supporting compliance in safety-critical applications.

  5. Non-corrosive, acetoxy-free chemistry ensures compatibility with sensitive electronic components and solder finishes.

Typical Applications Of Dow DOWSIL TC-4605 HLV Thermally Conductive Sealant

  1. Thermal interface and sealing of power electronics modules, including IGBTs and inverters.

  2. Heat sink attachment and gap-filling in LED lighting systems and automotive lighting assemblies.

  3. Encapsulation and thermal management of onboard chargers (OBC), DC-DC converters, and battery control units (BCUs) in electric vehicles.

  4. Sealing and thermal bonding of sensors, radar housings, and ADAS components exposed to wide temperature cycling.

Specifications Of Dow DOWSIL TC-4605 HLV Thermally Conductive Sealant

Chemical TypeCondensation-cure silicone elastomer
Product FormPaste, thixotropic, non-sag
AppearanceGray, uniform paste
Primary ApplicationsThermal interface material (TIM), structural thermal sealant
Key FeaturesThermally conductive, electrically insulating, low modulus, RTV cure
BenefitsReduces interfacial thermal resistance, mitigates mechanical stress, enhances long-term reliability
Cure MechanismMoisture-cure at ambient conditions
Operating Temperature Range−55 °C to +200 °C (continuous)


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