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SILASTIC™ MS-1001 Moldable Silicone

A medium viscosity, high Shore A hardness, two-part, 1:1 ratio, fast-curing optical molding resin for producing optical parts with good resistance to environmental aging.


  • Injection or compression molding for primary or secondary lenses, light pipes, light guides and other optic devices
LightFair International Technical Innovation Award

This award-winning moldable silicone provides excellent properties and secondary optics solutions for LED lamp/luminaire applications. Its curing speed is optimized for the injection molding process of silicone rubber. It is especially suitable for precision molding applications, as micrometer-sized features can be replicated on the lens surfact to direct light output, enabling lighting companies to design optics for luminaires with high lumen efficiency. High thermal stability ensures the retaining of high transparency – even in harsh environments.

Imagine a brighter future

Dow creates proven, high-performance silicon-based materials that help you create next-generation lighting. We offer today’s LED industry unmatched experience and know-how for LED lamp and luminaire assembly. Dow lighting experts work alongside your team to test designs, recommend modifications and provide total solutions to your challenges. Our partnership network of molding and optical experts helps our customers develop the best solutions.


These values are typical properties and are not intended for use in preparing specifications.

  • Dielectric Strength (kV/mm) 29 kV/mm
  • Durometer - Shore A 87 Shore A
  • Durometer - Shore D 25 Shore D
  • Number of Parts Two
  • Refractive Index at 633 nm 1.41
  • Solution Viscosity 14000 Centipoise
  • Tensile Strength 1740 psi
  • Viscosity (Part A) 20000 mPa.s
  • Viscosity (Part B) 9000 mPa.s

No Safety Data Sheets are available online for this material
Please Contact Dow for additional information.

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SILASTIC™ MS-1001 Moldable Silicone
No Technical Data Sheets are available for this product
Please Contact Dow for additional information.

SILASTIC™ MS-1001 Moldable Silicone

No Regulatory Data Sheets are available for this product

SILASTIC™ MS-1001 Moldable Silicone
Please Contact Dow for distribution options available for this product.