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

Wacker ELASTOSIL 4300 Silicone Rubber

Wacker ELASTOSIL® 4300 is a two-component, addition-cure liquid silicone rubber (LSR) offering excellent flow, low viscosity, and high tear strength. Ideal for precision injection molding of medical devices, baby care items, and technical parts requiring biocompatibility and thermal stability up to 200°C. Meets ISO 10993 and USP Class VI standards.
  • wacker elastosil 4300 silicone rubber_4ab20154
  • wacker elastosil 4300 silicone rubber_4ab20154

Features Of Wacker ELASTOSIL 4300 Silicone Rubber

  1. Platinum-catalyzed addition-cure system for low shrinkage and excellent dimensional stability.

  2. High transparency and exceptional optical clarity suitable for light-transmissive applications.

  3. Excellent biocompatibility, compliant with ISO 10993-5 and USP Class VI requirements.

  4. Outstanding resistance to aging, UV radiation, and extreme temperatures (–60 °C to +200 °C).

  5. Low compression set and superior elasticity for long-term sealing and dynamic gasket performance.

Typical Applications Of Wacker ELASTOSIL 4300 Silicone Rubber

  1. Medical device components including tubing, seals, and implantable sensor housings.

  2. Optical encapsulation of LEDs and photonic sensors requiring high light transmission.

  3. Food-contact compliant gaskets and seals for processing equipment and packaging machinery.

  4. Automotive under-hood components exposed to thermal cycling and vibration.

  5. Precision molds for soft-touch overmolding and microfluidic device fabrication.

Specifications Of Wacker ELASTOSIL 4300 Silicone Rubber

Chemical TypePlatinum-cured liquid silicone rubber (LSR)
Product FormTwo-component (Part A + Part B) liquid system
AppearanceClear, viscous liquid (Part A); clear, low-viscosity catalyst (Part B)
Shore A Hardness (Cured)40 ± 2
Tensile Strength (Cured)8.5 MPa (typical)
Elongation at Break (Cured)550% (typical)
Curing Temperature Range100–180 °C (time-dependent)
Primary ApplicationsMedical, optical, food-grade, and precision industrial sealing


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