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

Dow SILASTIC RTV-3481 Silicone Rubber

Dow SILASTIC RTV-3481 is a high-performance platinum-cured liquid silicone rubber (LSR) from Dow’s SILASTIC RTV series, offering excellent thermal stability, low compression set, and outstanding flow for precision molding of medical, automotive, and consumer parts.
  • dow silastic rtv 3481 silicone rubber_b15decc0
  • dow silastic rtv 3481 silicone rubber_b15decc0

Features Of Dow SILASTIC RTV-3481 Silicone Rubber

  1. Two-part, addition-cure liquid silicone rubber with excellent flow and low viscosity for precise mold filling.

  2. Fast room-temperature vulcanization (RTV) with adjustable cure speed via platinum catalyst concentration.

  3. Outstanding thermal stability — maintains mechanical integrity from –60 °C to +200 °C.

  4. Low compression set and high elongation (>350%), ensuring long-term sealing and resilience under dynamic stress.

  5. Biocompatibility compliant with ISO 10993-5 and USP Class VI, suitable for medical device encapsulation.

Typical Applications Of Dow SILASTIC RTV-3481 Silicone Rubber

  1. Encapsulation and potting of implantable and wearable medical electronics.

  2. Manufacturing of precision silicone molds for optical lenses and microfluidic devices.

  3. Sealing and gasketing in automotive sensors and EV battery management systems.

  4. Soft-touch overmolding on handheld diagnostic instruments and surgical tools.

  5. High-fidelity prototyping of anatomical models for surgical training and simulation.

Specifications Of Dow SILASTIC RTV-3481 Silicone Rubber

Chemical TypePlatinum-catalyzed addition-cure liquid silicone rubber
Product FormTwo-component (Part A: base polymer; Part B: catalyst)
AppearanceTranslucent, low-viscosity liquid (Part A); colorless to pale yellow liquid (Part B)
Primary ApplicationsMedical device encapsulation, precision molding, soft-sealing, biocompatible prototyping
Key FeaturesRTV at room temperature, low shrinkage (<0.2%), excellent detail reproduction
BenefitsNo by-products during cure, minimal outgassing, stable electrical properties
Cure Temperature Range23–150 °C (room-temperature cure typical; elevated temp accelerates throughput)
Shelf Life (Unopened)12 months at ≤25 °C, protected from moisture and direct sunlight


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