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

Shin-Etsu KE-555-U Silicone Rubber

Shin-Etsu KE-555-U is a high-performance addition-cure liquid silicone rubber featuring excellent transparency, low viscosity, and outstanding thermal stability. It offers superior mechanical strength, elongation, and biocompatibility—ideal for medical devices, optical encapsulation, and precision molding applications requiring FDA-compliant materials.
  • shin etsu ke 555 u silicone rubber_081c4c91
  • shin etsu ke 555 u silicone rubber_081c4c91

Features Of Shin-Etsu KE-555-U Silicone Rubber

  1. Two-part, addition-cure liquid silicone rubber with excellent flowability and low viscosity for precise mold filling.

  2. High thermal stability and long-term reliability across operating temperatures from –50 °C to +200 °C.

  3. Exceptional electrical insulation properties with low dielectric loss and high volume resistivity.

  4. Low compression set and outstanding elasticity retention after prolonged thermal aging.

  5. Meets UL 94 V-0 flammability rating and complies with RoHS and REACH regulatory requirements.

Typical Applications Of Shin-Etsu KE-555-U Silicone Rubber

  1. Encapsulation and potting of high-voltage power electronics and EV battery management systems (BMS).

  2. Sealing and insulating components in LED lighting modules and outdoor signage assemblies.

  3. Thermal interface materials (TIM) for heat-sensitive semiconductor housings and power modules.

  4. Soft-touch overmolding on automotive sensors and control units requiring vibration damping and environmental sealing.

  5. Medical device encapsulation where biocompatibility (ISO 10993 tested) and sterilization resistance are critical.

Specifications Of Shin-Etsu KE-555-U Silicone Rubber

Chemical TypePlatinum-catalyzed addition-cure silicone elastomer
Product FormTwo-component liquid (Part A: base, Part B: catalyst)
AppearanceTransparent, low-viscosity liquid (Part A); colorless to pale yellow liquid (Part B)
Shore A Hardness (7 days @ 23°C)55 ± 3
Tensile Strength (ASTM D412)≥ 8.0 MPa
Elongation at Break (ASTM D412)≥ 350 %
Volumetric Resistivity (ASTM D257)≥ 1.0 × 10¹⁵ Ω·cm
Dielectric Strength (ASTM D149)≥ 20 kV/mm


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