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

Dow DOWSIL MS-1003 Moldable Silicone A&B

Dow DOWSIL MS-1003 Moldable Silicone A&B is a two-part addition-cure silicone system from Dow’s DOWSIL™ portfolio offering exceptional flow control softness and dimensional stability ideal for prototyping encapsulation and low-stress molding applications requiring high biocompatibility and thermal resilience.
  • dow dowsil ms 1003 moldable silicone a b_4d96958e
  • dow dowsil ms 1003 moldable silicone a b_4d96958e

Features Of Dow DOWSIL MS-1003 Moldable Silicone A&B

  1. Two-part, room-temperature vulcanizing (RTV) silicone system with excellent moldability and dimensional stability before curing.

  2. Low viscosity A&B components enable easy mixing, degassing, and casting into intricate molds without air entrapment.

  3. Produces flexible, translucent silicone elastomers with outstanding tear strength and elongation after full cure.

  4. Non-corrosive, platinum-catalyzed chemistry—no by-products such as acetic acid or alcohols, ensuring compatibility with sensitive substrates.

  5. Excellent resistance to UV exposure, thermal cycling (-50 °C to +200 °C), and aging under ambient conditions.

Typical Applications Of Dow DOWSIL MS-1003 Moldable Silicone A&B

  1. Prototyping and low-volume production of soft-touch consumer product housings and grips.

  2. Manufacturing medical device components requiring biocompatibility support (ISO 10993 pre-screened).

  3. Encapsulation and potting of delicate electronics, sensors, and LED assemblies for environmental protection.

  4. Creating custom gaskets, seals, and vibration-damping pads in automotive and industrial equipment.

  5. Artistic and educational mold-making applications where clarity, safety, and reusability are critical.

Specifications Of Dow DOWSIL MS-1003 Moldable Silicone A&B

Chemical TypePlatinum-catalyzed addition-cure silicone elastomer
Product FormTwo-component liquid (Part A: base; Part B: catalyst)
Appearance (Uncured)Clear, low-viscosity liquids (Part A and Part B)
Mix Ratio (A:B)1:1 by volume
Cure MechanismRoom-temperature vulcanization (RTV); accelerated with mild heat
Shore A Hardness (7 days @ 23°C)20–25
Elongation at Break (ASTM D412)≥ 450%
Primary ApplicationsMold-making, encapsulation, soft prototyping, sealing, and cushioning


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