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

Wacker ELASTOSIL M 4503 Silicone Rubber

Wacker ELASTOSIL® M 4503 is a platinum-cured liquid silicone rubber (LSR) offering excellent flowability, low viscosity, and outstanding mechanical properties after curing. Ideal for injection molding of precision parts in medical, automotive, and consumer goods industries. Features high biocompatibility, thermal stability, and reproducible processing behavior.
  • wacker elastosil m 4503 silicone rubber_08e7a1e8
  • wacker elastosil m 4503 silicone rubber_08e7a1e8

Features Of Wacker ELASTOSIL M 4503 Silicone Rubber

  1. High tear strength and excellent elongation at break for demanding mechanical performance.

  2. Fast room-temperature vulcanization (RTV) with platinum-catalyzed addition curing system.

  3. Outstanding thermal stability across a wide operating temperature range (–60 °C to +180 °C).

  4. Low compression set ensuring long-term sealing integrity under continuous load.

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

Typical Applications Of Wacker ELASTOSIL M 4503 Silicone Rubber

  1. Medical device components including tubing, gaskets, and implantable seals.

  2. Automotive sensors and electronic encapsulation requiring vibration damping and thermal resilience.

  3. Food-contact compliant seals and gaskets in processing equipment.

  4. Industrial molds for precision casting of polyurethane and epoxy resins.

  5. Consumer electronics protective housings and interface pads.

Specifications Of Wacker ELASTOSIL M 4503 Silicone Rubber

Chemical TypePlatinum-catalyzed addition-curing liquid silicone rubber (LSR)
Product FormTwo-component liquid system (Part A + Part B)
AppearanceTransparent, low-viscosity liquid (Part A); translucent liquid catalyst (Part B)
Shore A Hardness (Cured)45 ± 2
Tensile Strength (Cured)8.5 MPa (ISO 37)
Elongation at Break (Cured)≥ 450 % (ISO 37)
Curing Time (25 °C / 100 °C)24 h / 5 min
Primary ApplicationsMedical devices, automotive sealing, food-grade components, precision molding


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