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

Dow SILASTIC RTV-4131-P1 Silicone Rubber

Dow SILASTIC RTV-4131-P1 is a platinum-cured, two-part addition-cure liquid silicone rubber offering excellent flow, low viscosity, and high tear strength. Ideal for precision molding of medical devices and electronics, it cures rapidly at room or elevated temperatures with minimal shrinkage and outstanding biocompatibility per ISO 10993.
  • dow silastic rtv 4131 p1 silicone rubber_8a2fcc06
  • dow silastic rtv 4131 p1 silicone rubber_8a2fcc06

Features Of Dow SILASTIC RTV-4131-P1 Silicone Rubber

  1. Two-part, platinum-catalyzed addition-cure silicone rubber offering excellent dimensional stability and low shrinkage.

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

  3. Outstanding resistance to thermal aging, UV exposure, and ozone—maintains performance from –55 °C to +200 °C.

  4. Low viscosity A/B components enable easy mixing, degassing, and high-fidelity replication of fine details.

  5. Meets UL 94 V-0 flammability rating and complies with RoHS and REACH regulatory requirements.

Typical Applications Of Dow SILASTIC RTV-4131-P1 Silicone Rubber

  1. High-reliability encapsulation and potting of electronic control units (ECUs) and power modules.

  2. Manufacturing precision silicone molds for medical device prototyping and low-volume production.

  3. Sealing and gasketing in automotive under-hood sensors and lighting assemblies.

  4. Thermal interface materials (TIM) for heat-sensitive electronics requiring long-term compression set resistance.

Specifications Of Dow SILASTIC RTV-4131-P1 Silicone Rubber

Chemical TypePlatinum-catalyzed addition-cure silicone rubber
Product FormTwo-component liquid (Part A: base; Part B: catalyst)
AppearanceTranslucent, viscous liquid (both components)
Mix Ratio by Weight10:1 (A:B)
Cure Condition (Typical)25 °C / 24 h or 80 °C / 30 min
Hardness (Shore A, ASTM D2240)31 ± 2
Tensile Strength (ASTM D412)7.5 MPa (typical)
Elongation at Break (ASTM D412)480 % (typical)


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