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

Wacker ELASTOSIL RT 625 A B Two-Component Silicone Rubber

Wacker ELASTOSIL RT 625 A/B is a two-component, addition-cure liquid silicone rubber offering excellent flowability, low viscosity, and high tear strength. Ideal for precision casting, encapsulation, and medical device molding, it cures rapidly at room or elevated temperatures with minimal shrinkage and outstanding biocompatibility per ISO 10993.
  • wacker elastosil rt 625 a b two component silicone rubber_92221d5c
  • wacker elastosil rt 625 a b two component silicone rubber_92221d5c

Features Of Wacker ELASTOSIL RT 625 A B Two-Component Silicone Rubber

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

  2. High tear strength and outstanding elongation at break for demanding dynamic applications.

  3. Excellent resistance to aging, UV radiation, and extreme temperatures (–60 °C to +180 °C).

  4. Low viscosity components enabling easy mixing, degassing, and cavity filling—even in complex molds.

  5. Biocompatibility compliant with ISO 10993-5 and USP Class VI (when fully cured under recommended conditions).

Typical Applications Of Wacker ELASTOSIL RT 625 A B Two-Component Silicone Rubber

  1. Medical device components including seals, gaskets, and wearable sensor housings.

  2. Automotive interior parts such as soft-touch buttons, control knobs, and acoustic dampers.

  3. Consumer electronics enclosures and protective overmolding for wearables and handheld devices.

  4. Industrial prototyping and functional rapid tooling for low-volume production.

  5. Food-contact compliant parts (subject to full curing and regulatory validation per FDA 21 CFR §177.2600).

Specifications Of Wacker ELASTOSIL RT 625 A B Two-Component Silicone Rubber

Chemical TypePlatinum-catalyzed addition-curing silicone rubber
Product FormTwo-component liquid system (Part A: base, Part B: catalyst)
Appearance (Part A)Translucent, colorless to pale yellow liquid
Appearance (Part B)Translucent, colorless to pale yellow liquid
Mixing Ratio (A:B) by Weight10:1
Cure Time (at 150 °C)5–10 minutes
Hardness (Shore A, ASTM D2240)62 ± 3
Density (g/cm³, DIN 53479)1.14 ± 0.02


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