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

Dow DOWSIL 3140 Silicone Rubber

Dow DOWSIL 3140 Silicone Rubber is a two-part addition-cure liquid silicone rubber offering excellent flow, low viscosity, and outstanding thermal stability. Ideal for precision molding of medical devices, seals, and gaskets, it cures rapidly at room or elevated temperatures with minimal shrinkage and superior biocompatibility per ISO 10993.
  • dow dowsil 3140 silicone rubber_906e09bc
  • dow dowsil 3140 silicone rubber_906e09bc

Features Of Dow DOWSIL 3140 Silicone Rubber

  1. High-consistency, two-part addition-cure silicone rubber with excellent processability in compression and transfer molding.

  2. Outstanding thermal stability, maintaining mechanical integrity from –60 °C to +200 °C long-term.

  3. Low compression set for reliable sealing performance under continuous mechanical stress.

  4. Excellent electrical insulation properties with high dielectric strength and volume resistivity.

  5. Good adhesion to various substrates including metals, glass, and engineered plastics without primers.

Typical Applications Of Dow DOWSIL 3140 Silicone Rubber

  1. Automotive engine gaskets and vibration-damping mounts exposed to elevated temperatures.

  2. Electrical and electronic encapsulation for power modules, sensors, and connectors.

  3. Industrial sealing components for pumps, valves, and fluid-handling systems.

  4. Medical device housings and non-implantable components requiring biocompatibility per ISO 10993-5.

  5. Appliance seals for ovens, dishwashers, and HVAC systems requiring flame-retardant performance.

Specifications Of Dow DOWSIL 3140 Silicone Rubber

Chemical TypePlatinum-catalyzed addition-cure silicone rubber
Product FormTwo-part (Part A: base polymer; Part B: catalyst)
AppearanceOff-white to light beige viscous paste (Part A); colorless to pale yellow liquid (Part B)
Primary ApplicationsSealing, gasketing, encapsulation, and vibration damping
Key FeaturesHigh consistency, low compression set, thermal stability, electrical insulation
BenefitsReduced post-molding trimming, extended service life at elevated temperatures, consistent part-to-part reproducibility
Curing SystemAddition cure (no by-products)
Shelf Life (unopened, 25 °C)12 months for Part A; 6 months for Part B


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