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

Dow DOWSIL DY39-012 r Silicone Rubber

Dow DOWSIL DY39-012 R is a high-performance addition-cure liquid silicone rubber from Dow’s DOWSIL portfolio, offering excellent thermal stability, low compression set, and outstanding electrical insulation—ideal for precision molding of seals, gaskets, and medical components requiring biocompatibility and FDA compliance.
  • dow dowsil dy39 012 r silicone rubber_64f121ad
  • dow dowsil dy39 012 r silicone rubber_64f121ad

Features Of Dow DOWSIL DY39-012 r Silicone Rubber

  1. High-transparency, platinum-cured liquid silicone rubber (LSR) with excellent optical clarity.

  2. Fast cure kinetics enabling high-efficiency injection molding and short cycle times.

  3. Outstanding biocompatibility, compliant with ISO 10993-5 and USP Class VI for medical-grade applications.

  4. Excellent thermal stability with continuous service temperature range from –60 °C to +200 °C.

  5. Low compression set and superior elasticity retention after prolonged deformation or elevated temperature exposure.

Typical Applications Of Dow DOWSIL DY39-012 r Silicone Rubber

  1. Medical devices requiring optical clarity and sterilization resistance, such as endoscope components and diagnostic housings.

  2. Wearable health sensors and flexible electronics encapsulation where transparency and skin contact safety are critical.

  3. Optically clear seals and gaskets in analytical instrumentation and laboratory equipment.

  4. Soft-touch overmolding on polycarbonate or ABS substrates for premium consumer healthcare devices.

  5. Custom-molded parts for drug delivery systems, including inhaler components and pump diaphragms.

Specifications Of Dow DOWSIL DY39-012 r Silicone Rubber

Chemical TypePlatinum-catalyzed addition-cure liquid silicone rubber (LSR)
Product FormTwo-part liquid system (Part A: base, Part B: catalyst)
AppearanceTransparent, viscous liquid
Shore A Hardness (ASTM D2240)12 ± 2
Tensile Strength (ASTM D412)3.5 MPa (typical)
Elongation at Break (ASTM D412)850% (typical)
Cure Temperature Range110–150 °C (recommended mold temperature)
Primary ApplicationsMedical, pharmaceutical, and optical-grade molded components


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