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

Dow SILASTIC RTV-4234-T4 Silicone Rubber

Dow SILASTIC RTV-4234-T4 is a two-part, platinum-catalyzed, addition-cure liquid silicone rubber offering excellent thermal stability, low compression set, and outstanding flow for precision molding of medical and optical components. It cures rapidly at room or elevated temperatures with minimal shrinkage and no by-products.
  • dow silastic rtv 4234 t4 silicone rubber_fbb1d3c2
  • dow silastic rtv 4234 t4 silicone rubber_fbb1d3c2

Features Of Dow SILASTIC RTV-4234-T4 Silicone Rubber

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

  2. High tear strength and elongation at break for demanding mechanical performance in dynamic sealing applications.

  3. UL 94 HB flammability rating and compliance with UL 746C for electrical insulating materials.

  4. Low viscosity before cure enables easy dispensing, degassing, and cavity filling—even in complex geometries.

  5. Shore A hardness of ~40 after full cure, providing a balanced combination of flexibility and resilience.

Typical Applications Of Dow SILASTIC RTV-4234-T4 Silicone Rubber

  1. Automotive under-hood gaskets and vibration-damping mounts requiring thermal and chemical resistance.

  2. Electrical encapsulation and potting of sensors, connectors, and power modules in EV and industrial electronics.

  3. Medical device housings and seals where biocompatibility (ISO 10993-5 tested) and sterilization resistance are critical.

  4. Aerospace component sealing for avionics enclosures exposed to wide temperature ranges and fuel vapors.

Specifications Of Dow SILASTIC RTV-4234-T4 Silicone Rubber

Chemical TypePlatinum-catalyzed addition-cure silicone elastomer
Product FormTwo-component liquid system (Part A + Part B)
AppearanceTranslucent, low-viscosity liquids (Part A: colorless; Part B: pale amber)
Primary ApplicationsSealing, gasketing, potting, and encapsulation
Key FeaturesLow compression set, high elongation, thermal stability (–60 °C to +200 °C continuous)
BenefitsLong-term reliability in dynamic environments, minimal outgassing, no by-products during cure
Cure MechanismAddition reaction (no condensation or alcohol release)
Shelf Life12 months unopened at 25 °C; store below 30 °C and protect from moisture


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