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

Dow DOWSIL 739 Silicone Rubber

Dow DOWSIL 739 Silicone Rubber is a one-part, platinum-cured, high-strength elastomer offering excellent tear resistance, low compression set, and broad temperature stability (−60°C to 200°C). Ideal for demanding sealing, gasketing, and bonding applications across automotive, electronics, and industrial sectors.
  • dow dowsil 739 silicone rubber_e65cf26b
  • dow dowsil 739 silicone rubber_e65cf26b

Features Of Dow DOWSIL 739 Silicone Rubber

  1. High-performance, one-part, moisture-curing silicone rubber with excellent adhesion to glass, metals, and plastics.

  2. Low modulus and high elongation for superior flexibility and stress relief in dynamic assemblies.

  3. Excellent resistance to UV, ozone, and extreme temperatures (–55 °C to 200 °C continuous).

  4. Non-corrosive cure chemistry—ideal for sensitive electronic and optical components.

  5. Good electrical insulation properties and low outgassing, compliant with NASA ASTM E595 requirements.

Typical Applications Of Dow DOWSIL 739 Silicone Rubber

  1. Sealing and bonding of architectural glazing systems, including structural and perimeter sealants for insulating glass units.

  2. Encapsulation and potting of LED lighting modules and outdoor signage assemblies.

  3. Weatherproofing and vibration damping in automotive lighting and sensor housings.

  4. Mounting and sealing of solar panel frame attachments and junction box interfaces.

  5. Assembly of medical device enclosures requiring biocompatibility-supporting materials (ISO 10993 tested).

Specifications Of Dow DOWSIL 739 Silicone Rubber

Chemical TypeCondensation-cure, acetoxy-terminated silicone polymer
Product FormThixotropic paste, single-component
AppearanceOpaque white or translucent beige paste
Primary ApplicationsStructural glazing, LED encapsulation, outdoor electronics sealing
Key FeaturesAdhesion without primer, low shrinkage, non-slumping
BenefitsReduced assembly time, long-term reliability under thermal cycling, no post-cure required
Shelf Life12 months unopened at 25 °C in original sealed packaging
Storage ConditionsStore between 5 °C and 28 °C; protect from moisture and direct sunlight


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