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

Wacker ELASTOSIL E303 Silicone Rubber

Wacker ELASTOSIL E303 is a two-component, addition-curing liquid silicone rubber (LSR) offering excellent flowability, low viscosity, and high tear strength. Ideal for precision molding of medical devices, baby products, and technical parts, it cures rapidly at elevated temperatures with minimal shrinkage and outstanding biocompatibility per ISO 10993.
  • wacker elastosil e303 silicone rubber_be23a5d6
  • wacker elastosil e303 silicone rubber_be23a5d6

Features Of Wacker ELASTOSIL E303 Silicone Rubber

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

  2. High transparency and exceptional clarity after curing, ideal for optical and aesthetic applications.

  3. Excellent biocompatibility and compliance with ISO 10993 and USP Class VI standards.

  4. Good thermal resistance with continuous service temperature range from –60 °C to +200 °C.

  5. Low compression set and outstanding long-term elasticity for dynamic sealing applications.

Typical Applications Of Wacker ELASTOSIL E303 Silicone Rubber

  1. Medical devices including tubing, seals, and implantable component housings.

  2. Pharmaceutical stoppers and closures requiring extractables control and sterilization compatibility.

  3. Optical encapsulation for LEDs and sensors due to high light transmission and UV stability.

  4. Food-contact gaskets and seals compliant with FDA 21 CFR §177.2600.

  5. Precision molded parts for automotive sensors and electronic potting where reliability is critical.

Specifications Of Wacker ELASTOSIL E303 Silicone Rubber

Chemical TypePlatinum-cured liquid silicone rubber (LSR)
Product FormTwo-component liquid system (Part A + Part B)
AppearanceTransparent, viscous liquid
Primary ApplicationsMedical, pharmaceutical, optical, food-contact, and precision engineering components
Key FeaturesBiocompatible, low extractables, high clarity, excellent flow properties
BenefitsConsistent part quality, short cycle times, minimal post-curing requirements
Curing SystemAddition cure (hydrosilylation)
Shore A Hardness (Cured)30 ± 2


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