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

Wacker ELASTOSIL M 4470 Silicone Rubber

Wacker ELASTOSIL® M 4470 is a platinum-cured, two-component addition-curing liquid silicone rubber offering excellent mechanical strength, thermal stability up to 180°C, and low compression set. Ideal for precision molding of medical devices, seals, and technical parts requiring biocompatibility and reproducible high-detail replication. Meets ISO 10993 and USP Class VI standards.
  • wacker elastosil m 4470 silicone rubber_b93257d9
  • wacker elastosil m 4470 silicone rubber_b93257d9

Features Of Wacker ELASTOSIL M 4470 Silicone Rubber

  1. High tear strength and excellent elongation at break for demanding dynamic sealing applications.

  2. Outstanding resistance to compression set, ensuring long-term sealing performance under continuous load.

  3. Good processability in liquid injection molding (LIM) and high reproducibility across production batches.

  4. Platinum-catalyzed addition cure system with low volatile organic compound (VOC) emissions.

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

Typical Applications Of Wacker ELASTOSIL M 4470 Silicone Rubber

  1. Medical device components including respiratory masks, tubing connectors, and drug delivery seals.

  2. Automotive fluid handling systems such as coolant expansion tanks and HVAC diaphragms.

  3. Consumer appliance gaskets for coffee machines, steam ovens, and high-temperature kitchen equipment.

  4. Industrial sensors and pressure transducer membranes requiring stable dielectric properties.

  5. Food-contact parts like pump seals and mixing vessel liners meeting FDA 21 CFR §177.2600 requirements.

Specifications Of Wacker ELASTOSIL M 4470 Silicone Rubber

Chemical TypePlatinum-catalyzed addition-curing liquid silicone rubber (LSR)
Product FormTwo-component (A + B) viscous liquid system
AppearanceTranslucent, low-viscosity paste (Component A); translucent, low-viscosity paste (Component B)
Mix Ratio (A:B) by Weight1:1
Cure Temperature Range110–180 °C
Shore A Hardness (cured)40 ± 3
Tensile Strength (cured)8.0–10.0 MPa
Elongation at Break (cured)550–650 %


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