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

Shin-Etsu KE-655-U Silicone Rubber

Shin-Etsu KE-655-U is a high-performance addition-cure liquid silicone rubber (LSR) offering excellent flow, low viscosity, and superior thermal stability. Ideal for precision molding of medical devices, automotive seals, and electronics encapsulation, it cures rapidly at elevated temperatures with minimal shrinkage and outstanding biocompatibility per ISO 10993.
  • shin etsu ke 655 u silicone rubber_b2a27d24
  • shin etsu ke 655 u silicone rubber_b2a27d24

Features Of Shin-Etsu KE-655-U Silicone Rubber

  1. High-temperature resistance up to 200 °C continuous service with excellent thermal stability.

  2. Outstanding electrical insulation properties, including low dielectric loss and high volume resistivity.

  3. Excellent flexibility and resilience across a wide temperature range (–60 °C to +200 °C).

  4. Good resistance to ozone, UV radiation, and weathering without significant degradation.

  5. Platinum-catalyzed addition-cure system enabling low shrinkage, precise dimensional control, and no by-product formation.

Typical Applications Of Shin-Etsu KE-655-U Silicone Rubber

  1. High-voltage insulators and bushings for power transmission equipment.

  2. Sealing and encapsulation components in electric vehicle (EV) battery modules and power electronics.

  3. Protective coatings and gaskets for outdoor telecom infrastructure and solar inverter housings.

  4. Thermal interface materials (TIMs) requiring long-term stability under cyclic thermal stress.

  5. Medical-grade device housings where biocompatibility and sterilization resistance are required (subject to qualification).

Specifications Of Shin-Etsu KE-655-U Silicone Rubber

Chemical TypePlatinum-catalyzed addition-cure liquid silicone rubber (LSR)
Product FormTwo-component (Part A: base; Part B: catalyst), supplied separately
Appearance (Uncured)Translucent, low-viscosity liquid
Cure Temperature Range100–150 °C (typical; time-dependent)
Hardness (Shore A, cured)55 ± 3
Tensile Strength (cured)≥ 7.0 MPa
Elongation at Break (cured)≥ 350 %
Density (cured)1.12–1.16 g/cm³


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