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

Dow DOWSIL SE 4430 Silicone Rubber

Dow DOWSIL SE 4430 Silicone Rubber is a high-strength, two-part addition-cure liquid silicone elastomer offering excellent thermal stability, low compression set, and outstanding flow for precision molding. Ideal for medical devices, seals, and gaskets, it cures rapidly at room or elevated temperatures with minimal shrinkage and superior biocompatibility per ISO 10993.
  • dow dowsil se 4430 silicone rubber_ca12ca08
  • dow dowsil se 4430 silicone rubber_ca12ca08

Features Of Dow DOWSIL SE 4430 Silicone Rubber

  1. High tear strength and excellent elongation for demanding dynamic sealing applications.

  2. Fast room-temperature vulcanization (RTV) with low compression set after curing.

  3. Outstanding resistance to ozone, UV radiation, and extreme temperatures (–60 °C to +200 °C).

  4. Good adhesion to common substrates including metals, glass, and plastics without primer.

  5. Low volatility and compliant with FDA 21 CFR 177.2600 for incidental food contact.

Typical Applications Of Dow DOWSIL SE 4430 Silicone Rubber

  1. Aerospace gaskets and vibration-damping seals.

  2. Automotive under-hood components requiring thermal and chemical resilience.

  3. Industrial equipment housings and enclosures exposed to harsh environmental conditions.

  4. Medical device housings where biocompatibility and sterilization resistance are critical.

  5. LED lighting encapsulation and optical bonding due to high transparency and stability.

Specifications Of Dow DOWSIL SE 4430 Silicone Rubber

Chemical TypePlatinum-cured addition-cure silicone rubber
Product FormTwo-part liquid (Part A: base; Part B: catalyst)
AppearanceTranslucent, low-viscosity liquid
Shore A Hardness (7 days, 23 °C)40 ± 3
Tensile Strength (ASTM D412)8.5 MPa typical
Elongation at Break (ASTM D412)450% typical
Cure Time (Surface Dry, 23 °C / 50% RH)30–45 minutes
Operating Temperature Range–60 °C to +200 °C (continuous)


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