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

Dow SILASTIC RTV-4250-S Silicone Rubber

Dow SILASTIC RTV-4250-S is a two-part platinum-cure liquid silicone rubber offering excellent flow, low viscosity, and high thermal stability. Ideal for precision molding of medical devices and electronics, it delivers outstanding biocompatibility, tear resistance, and dimensional stability after curing at room temperature or elevated heat.
  • dow silastic rtv 4250 s silicone rubber_8ab71eec
  • dow silastic rtv 4250 s silicone rubber_8ab71eec

Features Of Dow SILASTIC RTV-4250-S Silicone Rubber

  1. High-performance, two-part addition-cure silicone rubber with excellent thermal stability.

  2. Low viscosity and long pot life for easy mixing, degassing, and mold filling.

  3. Exceptional tear strength and elongation for durable, flexible cured parts.

  4. Ultra-low compression set for reliable sealing and gasketing performance over time.

  5. Meets UL 94 HB flammability rating and complies with RoHS and REACH directives.

Typical Applications Of Dow SILASTIC RTV-4250-S Silicone Rubber

  1. Medical device encapsulation and biocompatible component molding.

  2. Automotive sensor housings and under-hood vibration-damping components.

  3. Electronics potting and conformal coating for high-reliability PCBs.

  4. Industrial gaskets and seals requiring resilience across wide temperature ranges.

  5. Consumer appliance interfaces and touch-sensitive silicone overlays.

Specifications Of Dow SILASTIC RTV-4250-S Silicone Rubber

Chemical TypePlatinum-catalyzed addition-cure silicone rubber
Product FormTwo-component liquid system (Part A + Part B)
AppearanceClear to translucent viscous liquids
Primary ApplicationsEncapsulation, potting, gasketing, and soft-tooling
Key FeaturesLow shrinkage, minimal exotherm, and excellent flow characteristics
BenefitsDimensional stability, high dielectric strength, and resistance to aging
Cure SystemRoom temperature or elevated temperature (e.g., 60–100 °C)
Shelf Life12 months unopened at 25 °C in original sealed containers


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