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

Dow SILASTIC DY 35-1289 Silicone Rubber

Dow SILASTIC DY 35-1289 is a high-strength, heat-resistant liquid silicone rubber (LSR) from Dow’s SILASTIC medical-grade portfolio. It offers excellent biocompatibility, low compression set, and rapid vulcanization—ideal for precision-cast healthcare devices, seals, and wearable components requiring ISO 10993 and USP Class VI compliance.
  • dow silastic dy 35 1289 silicone rubber_1f9d7efa
  • dow silastic dy 35 1289 silicone rubber_1f9d7efa

Features Of Dow SILASTIC DY 35-1289 Silicone Rubber

  1. High-transparency, platinum-cured silicone elastomer with excellent optical clarity and low haze.

  2. Outstanding biocompatibility, compliant with USP Class VI and ISO 10993-5/-10 testing standards.

  3. Excellent thermal stability across a wide operating range (–60 °C to +200 °C).

  4. Low compression set and superior long-term elastic recovery for dynamic sealing applications.

  5. Ready-to-use two-part liquid silicone rubber (LSR) system with balanced viscosity and extended pot life.

Typical Applications Of Dow SILASTIC DY 35-1289 Silicone Rubber

  1. Medical-grade tubing and catheters requiring clarity and sterilization resistance.

  2. Implantable and short-term contact medical devices, including drug delivery components.

  3. Optically clear seals and gaskets for diagnostic equipment and analytical instrumentation.

  4. Soft-touch overmolding on thermoplastic substrates in healthcare and consumer electronics.

  5. Custom molded parts for pharmaceutical processing systems exposed to steam and gamma sterilization.

Specifications Of Dow SILASTIC DY 35-1289 Silicone Rubber

Chemical TypePlatinum-cured liquid silicone rubber (LSR)
Product FormTwo-component (Part A + Part B), flowable liquid
AppearanceTranslucent, colorless liquid (Part A); translucent, colorless liquid (Part B)
Primary ApplicationsMedical device components, precision seals, optical interfaces
Key FeaturesUSP Class VI compliant, low extractables, high clarity, autoclavable
Shore A Hardness (Cured)35 ± 2
Cure Temperature Range110 °C to 160 °C (time-dependent)
Specific Gravity (Uncured, 25 °C)1.10 – 1.14


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