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

Wacker ELASTOSIL RT 771 Silicone Rubber

Wacker ELASTOSIL® RT 771 is a two-component, addition-cure liquid silicone rubber offering excellent mechanical strength, thermal stability up to 200°C, and outstanding release properties. Ideal for precision casting, prototyping, and industrial molding, it cures rapidly at room temperature or with mild heat. Its low viscosity ensures easy degassing and fine-detail replication while maintaining high tear resistance and biocompatibility per ISO 10993.
  • wacker elastosil rt 771 silicone rubber_d9c3b43a
  • wacker elastosil rt 771 silicone rubber_d9c3b43a

Features Of Wacker ELASTOSIL RT 771 Silicone Rubber

  1. Platinum-catalyzed, addition-cure liquid silicone rubber with excellent thermal stability.

  2. Low viscosity for easy processing via injection molding, casting, or dispensing.

  3. High transparency and outstanding optical clarity after curing.

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

  5. Good mechanical properties including high elongation and tear resistance.

Typical Applications Of Wacker ELASTOSIL RT 771 Silicone Rubber

  1. Medical devices such as tubing, seals, and implantable components.

  2. Optical encapsulation for LEDs and sensors requiring high light transmission.

  3. Soft-touch overmolding on medical and consumer electronics housings.

  4. Custom molded parts for pharmaceutical packaging and fluid handling systems.

  5. Prototyping and low-volume production of precision elastomeric components.

Specifications Of Wacker ELASTOSIL RT 771 Silicone Rubber

Chemical TypePlatinum-catalyzed addition-cure LSR
Product FormTwo-component liquid (Part A + Part B)
AppearanceColorless to slightly yellow transparent liquid
Primary ApplicationsMedical, optical, and precision industrial molding
Key FeaturesBiocompatible, optically clear, low-viscosity, heat-curable
Shore A Hardness (Cured)70 ± 3
Curing Temperature Range100–150 °C
ComplianceISO 10993-5, USP Class VI, FDA-compliant (for intended use)


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