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

Shin-Etsu KE-1381-A/B Silicone Rubber

Shin-Etsu KE-1381-A/B is a two-part addition-cure liquid silicone rubber offering excellent flow, low viscosity, and high thermal stability. Ideal for precision molding of medical devices and electronics, it delivers superior biocompatibility, low shrinkage, and consistent mechanical properties after curing at room or elevated temperatures.
  • shin etsu ke 1381 a b silicone rubber_12b4f472
  • shin etsu ke 1381 a b silicone rubber_12b4f472

Features Of Shin-Etsu KE-1381-A/B Silicone Rubber

  1. Two-part, platinum-catalyzed addition-cure liquid silicone rubber system offering excellent processability and low viscosity before curing.

  2. Provides outstanding thermal stability with continuous service temperature range from –60 °C to +200 °C.

  3. Delivers high elongation (>400%) and excellent tensile strength after full cure, ensuring robust mechanical performance.

  4. Exhibits exceptional electrical insulation properties and low compression set for long-term sealing reliability.

  5. Meets UL 94 V-0 flammability rating and complies with RoHS and REACH directives for regulated markets.

Typical Applications Of Shin-Etsu KE-1381-A/B Silicone Rubber

  1. Automotive sensors and electronic encapsulation requiring vibration resistance and thermal cycling durability.

  2. Medical device components including seals, gaskets, and housings compliant with ISO 10993 biocompatibility guidelines.

  3. LED lighting encapsulants and optical lenses benefiting from high transparency and UV stability.

  4. Industrial potting and coating applications for PCBs, power modules, and control units exposed to harsh environments.

  5. Consumer electronics interface pads, soft-touch buttons, and wearable device seals demanding skin-safe formulation.

Specifications Of Shin-Etsu KE-1381-A/B Silicone Rubber

Chemical TypePlatinum-catalyzed addition-cure liquid silicone rubber
Product FormTwo-component (Part A & Part B), pourable liquid
Appearance (Uncured)Part A: Transparent to light amber viscous liquid; Part B: Transparent to light amber viscous liquid
Mixing Ratio (A:B)1:1 by weight
Cure Condition150 °C × 5 minutes or room temperature + accelerated post-cure
Hardness (Shore A)35 ± 3
Tensile Strength≥ 7.0 MPa
Elongation at Break≥ 420%


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