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

Shin-Etsu KE-981-U Silicone Rubber

Shin-Etsu KE-981-U is a high-performance addition-cure liquid silicone rubber from Shin-Etsu’s KE-980 series, offering excellent low-temperature flexibility, thermal stability up to 200°C, and outstanding electrical insulation. It cures rapidly at room or elevated temperatures with precise dimensional stability and low compression set—ideal for precision molding of medical, automotive, and electronic components.
  • shin etsu ke 981 u silicone rubber_48f2c3eb
  • shin etsu ke 981 u silicone rubber_48f2c3eb

Features Of Shin-Etsu KE-981-U Silicone Rubber

  1. High-transparency, addition-cure liquid silicone rubber (LSR) with excellent optical clarity and low haze.

  2. Fast curing at moderate temperatures (100–150 °C), enabling high-throughput injection molding.

  3. Outstanding thermal stability and long-term aging resistance up to 200 °C continuous use.

  4. Biocompatibility compliant with ISO 10993-5 and USP Class VI for medical-grade applications.

  5. Low compression set and superior elasticity retention after repeated deformation cycles.

Typical Applications Of Shin-Etsu KE-981-U Silicone Rubber

  1. Optical lenses and light guides for LED lighting and automotive lighting systems.

  2. Seals and gaskets in demanding automotive powertrain and EV battery modules.

  3. Medical tubing, catheter components, and wearable sensor housings.

  4. Consumer electronics encapsulation, including waterproof buttons and flexible interface elements.

  5. Industrial fluid-handling components requiring chemical resistance and dimensional stability.

Specifications Of Shin-Etsu KE-981-U Silicone Rubber

Chemical TypePlatinum-catalyzed addition-cure liquid silicone rubber
Product FormTwo-part liquid (Part A + Part B), supplied separately
AppearanceClear, colorless viscous liquid
Base Polymer Viscosity (25 °C)~40,000–50,000 cP (Part A)
Cure Temperature Range100–150 °C
Shore A Hardness (Cured)50 ± 3
Tensile Strength (Cured)≥ 7.0 MPa
Elongation at Break (Cured)≥ 400 %


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