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

Dow DOWSIL HS II Thixotropic Silicone Rubber

Dow DOWSIL HS II Thixotropic Silicone Rubber is a high-strength, two-part platinum-cured silicone elastomer offering excellent thixotropy for vertical and overhead applications. It delivers superior tear resistance, thermal stability (–60°C to 200°C), low compression set, and outstanding adhesion to diverse substrates without primers—ideal for demanding sealing, bonding, and potting in automotive, electronics, and industrial sectors.
  • dow dowsil hs ii thixotropic silicone rubber_0643b19f
  • dow dowsil hs ii thixotropic silicone rubber_0643b19f

Features Of Dow DOWSIL HS II Thixotropic Silicone Rubber

  1. Thixotropic formulation enables excellent sag resistance and shape retention on vertical and overhead surfaces.

  2. High-temperature stability up to 200 °C continuous use, with short-term exposure capability to 250 °C.

  3. Low compression set ensures long-term sealing integrity under mechanical stress and thermal cycling.

  4. Excellent adhesion to metals, plastics, and cured silicone substrates without primer.

  5. UL 94 HB rated for flame resistance in electrical and electronic enclosures.

Typical Applications Of Dow DOWSIL HS II Thixotropic Silicone Rubber

  1. High-temperature gasketing for automotive exhaust manifolds and turbocharger housings.

  2. Sealing and potting of power electronics, including inverters and DC-DC converters.

  3. Form-in-place (FIP) gaskets for aerospace avionics enclosures requiring vibration damping.

  4. Thermal interface material (TIM) bonding and gap filling in LED lighting systems.

  5. Static sealing of industrial sensors and pressure transducers operating in harsh environments.

Specifications Of Dow DOWSIL HS II Thixotropic Silicone Rubber

Chemical TypeHigh-consistency addition-cure silicone rubber
Product FormPaste, thixotropic two-part system (Part A + Part B)
AppearanceOff-white to light gray viscous paste
Primary ApplicationsHigh-temperature static sealing, FIP gasketing, and thermal management
Key FeaturesThixotropic, primerless adhesion, low compression set, UL 94 HB
Cure MechanismPt-catalyzed hydrosilylation (addition cure)
Shelf Life12 months at 25 °C unopened
Operating Temperature Range−60 °C to +200 °C (continuous); up to +250 °C (intermittent)


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