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Dow Silicone Solutions for E-Mobility


To help make electric vehicles a high-performing, cost-effective transportation alternative, Dow is investing in new silicone solutions for the design and assembly of e-mobility applications. This includes collaborating with battery cell makers, system designers, assemblers, tier suppliers, and vehicle OEMs to improve the efficiency and reliability of next-generation battery packs and systems.


Power Electronics


Battery Packs








Advantages of Silicones in E-Mobility

Silicone’s unique attributes and success in today’s printed circuit board (PCB) and automotive applications provide a solid foundation in addressing challenges for the electric vehicles of tomorrow. Advantages of e-mobility silicone technology include:

  • Very low thermal resistance
  • Flow, wetting, adhesion, and cure properties that can help speed and simplify processing
  • Excellent thermal stability with a wide operating temperature range
  • Reliable performance under harsh conditions, including resistance to thermal shock, oxidation, moisture, and chemicals
  • Excellent electrical insulation (dielectric strength)
  • Excellent stress relief
  • Silicone foams enable light weighting


E-Mobility Silicone Technologies

Silicones come in a wide variety of chemistries catered towards specific applications. Dow develops high-performing formulations to tackle each component of an electric vehicle:


Products Benefits
Conformal Coatings

With a broad range of durometers and very low modulus options, silicone conformal coatings deliver stress relief on delicate circuit board components during thermal cycling.

Encapsulants, Gels & Foams

Providing cell protection in case of a thermal event, these materials offer lightweight thermal coupling, vibration dampening, and flexibility.

Gap Fillers

These soft, compressible, two-part silicones are thermally conductive and ideal for high-heat applications like battery packs and module assemblies.

Thermally & Electrically Conductive Adhesives

Typically self-priming, re-workable, and solventless, these materials provide fast and durable adhesion for applications requiring heat and electrical transfer.


To learn more download Dow's E-Mobility Materials Selection Guide.





Dow Dowsil™ TC-5515 Low Density Thermally Conductive Gap Filler


In the booming electric vehicles market, EV battery packs are arguably the most important feature. Thermal management is critical for improving EV battery pack safety and extending its lifetime. For heat dissipation, a thermally conductive gap filler is required.


The DOWSIL™ TC-5515 LT Low Density Thermal Conductive Gap Filler is specifically designed to dissipate heat from EV batteries and control unit modules to provide a reliable cooling solution due to the stability of properties during typical environmental exposure.



  • Heat dissipation
  • Lightweight and lower total cost
  • Good durability in an automotive environment
  • Easy application process and high throughput
  • UL 94 V0, low flame risk
  • Low equipment maintenance cost due to low abrasion performance


  • EV battery assembly
  • Electric control unit module assembly



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