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

Wacker ELASTOSIL RT 685 A B Two-Component Silicone Rubber

Wacker ELASTOSIL RT 685 A/B is a platinum-catalyzed two-component addition-cure silicone rubber offering excellent mechanical strength, thermal stability up to 200°C, and low compression set. Ideal for precision molding, gaskets, and medical device components requiring biocompatibility (ISO 10993 compliant) and reproducible Shore A 65 hardness.
  • wacker elastosil rt 685 a b two component silicone rubber_78276342
  • wacker elastosil rt 685 a b two component silicone rubber_78276342

Features Of Wacker ELASTOSIL RT 685 A B Two-Component Silicone Rubber

  1. Excellent thermal stability with continuous service temperature range from –60 °C to +180 °C.

  2. Low viscosity and long pot life for easy mixing, degassing, and casting of complex geometries.

  3. High tear strength and outstanding elasticity after room-temperature or elevated-temperature curing.

  4. Platinum-catalyzed addition cure system offering minimal shrinkage and excellent dimensional stability.

  5. Biocompatibility tested per ISO 10993–5 and USP Class VI, suitable for medical device prototyping.

Typical Applications Of Wacker ELASTOSIL RT 685 A B Two-Component Silicone Rubber

  1. Prototyping and low-volume production of medical device components (e.g., seals, gaskets, housings).

  2. Manufacturing of precision silicone molds for investment casting and polyurethane part replication.

  3. Encapsulation and potting of sensitive electronic assemblies requiring thermal and electrical insulation.

  4. Production of soft-touch grips, ergonomic handles, and tactile feedback elements in industrial equipment.

  5. Custom fabrication of vibration-damping mounts and acoustic isolation pads in transportation systems.

Specifications Of Wacker ELASTOSIL RT 685 A B Two-Component Silicone Rubber

Chemical TypePlatinum-catalyzed addition-cure liquid silicone rubber (LSR)
Product FormTwo-component system: Part A (base) and Part B (catalyst)
AppearancePart A: Transparent, low-viscosity liquid; Part B: Transparent, low-viscosity liquid
Mixing Ratio (A:B)10:1 by weight
Cure MechanismAddition reaction (hydrosilylation), no by-products
Curing ConditionsRT cure: 24 h at 23 °C; accelerated cure: 4 h at 80 °C
Density (23 °C)Approx. 1.10 g/cm³ (mixed)
Shore A Hardness (7 days, 23 °C)65 ± 3


Get in Touch with ERICW
Let competitive chemical materials go global.

Your Name *

Your Email *

Your Phone

Country

Your Message *