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

Dow SILASTIC RTV-3120 Silicone Rubber

Dow SILASTIC RTV-3120 is a two-part platinum-catalyzed silicone rubber offering excellent tear strength, low compression set, and outstanding thermal stability from –65°C to 200°C. Ideal for precision molding, gasketing, and encapsulation in aerospace, medical, and electronics applications. Fast room-temperature vulcanization with minimal shrinkage and superior biocompatibility per ISO 10993.
  • dow silastic rtv 3120 silicone rubber_988c7b31
  • dow silastic rtv 3120 silicone rubber_988c7b31

Features Of Dow SILASTIC RTV-3120 Silicone Rubber

  1. Two-part, addition-cure silicone rubber offering excellent tear strength and elongation.

  2. Low viscosity before cure enables easy mixing, degassing, and mold filling for complex geometries.

  3. Fast room-temperature vulcanization (RTV) with minimal exotherm, supporting efficient production cycles.

  4. Outstanding thermal stability — maintains mechanical integrity from –65 °C to +200 °C after curing.

  5. UL 94 HB rated and compliant with RoHS and REACH, suitable for regulated industrial environments.

Typical Applications Of Dow SILASTIC RTV-3120 Silicone Rubber

  1. Prototyping and low-volume production of flexible molds for polyurethane, epoxy, and gypsum casting.

  2. Sealing and encapsulation of electronic components requiring thermal cycling resistance and electrical insulation.

  3. Manufacturing of soft-touch grips, gaskets, and vibration-damping parts in automotive interiors.

  4. Medical device component fabrication where biocompatibility support (ISO 10993 testing available upon request) is required.

Specifications Of Dow SILASTIC RTV-3120 Silicone Rubber

Chemical TypePlatinum-catalyzed addition-cure silicone elastomer
Product FormTwo-component liquid system (Part A: base; Part B: catalyst)
Appearance (Uncured)Part A: translucent light amber liquid; Part B: translucent colorless liquid
Mix Ratio by Weight10:1 (A:B)
Cure MechanismRoom temperature or elevated temperature addition cure
Shore A Hardness (Cured)20 ± 2
Tensile Strength (Cured)5.5 MPa (ASTM D412)
Elongation at Break (Cured)450% (ASTM D412)


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

Your Name *

Your Email *

Your Phone

Country

Your Message *