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

Wacker ELASTOSIL RT 771 Two-Component Silicone Rubber

Wacker ELASTOSIL RT 771 is a two-component addition-curing silicone rubber offering excellent tear strength, low compression set, and outstanding thermal stability. Ideal for precision molding of medical devices, seals, and technical parts, it cures rapidly at room temperature with precise 1:1 mixing ratio and minimal shrinkage.
  • wacker elastosil rt 771 two component silicone rubber_b20c1f85
  • wacker elastosil rt 771 two component silicone rubber_b20c1f85

Features Of Wacker ELASTOSIL RT 771 Two-Component Silicone Rubber

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

  2. Fast room-temperature curing without the need for heat or pressure, enabling efficient production cycles.

  3. Outstanding biocompatibility and compliance with ISO 10993-5 and USP Class VI standards.

  4. Low compression set ensures long-term sealing integrity in dynamic gasket and medical device applications.

  5. Excellent resistance to aging, ozone, UV radiation, and repeated sterilization (e.g., steam, EtO, gamma).

Typical Applications Of Wacker ELASTOSIL RT 771 Two-Component Silicone Rubber

  1. Medical-grade tubing and fluid handling components for diagnostic and therapeutic devices.

  2. Seals, gaskets, and housings in implantable and wearable medical electronics.

  3. Soft-touch overmolding on thermoplastic substrates for ergonomic medical instrument handles.

  4. Custom-molded parts for drug delivery systems, including pump diaphragms and valve components.

  5. Prototyping and low-volume production of FDA-regulated silicone parts requiring rapid RTV processing.

Specifications Of Wacker ELASTOSIL RT 771 Two-Component Silicone Rubber

Chemical TypePlatinum-cured addition-cure silicone rubber
Product FormTwo-component liquid system (Part A + Part B)
AppearanceTranslucent, low-viscosity liquid (Part A); translucent liquid catalyst (Part B)
Mixing Ratio (by weight)10:1 (A:B)
Curing Time (RT, 23°C)≈2–4 hours to handle; full cure in 24 hours
Shore A Hardness (cured)70 ± 3
Density (cured)1.12 g/cm³
ComplianceISO 10993-5, USP Class VI, FDA 21 CFR 177.2600


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