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SILASTIC™ MS-1003 Moldable Silicone

Medium viscosity, fast curing optical molding resin for producing fine detail with good resistance to environmental ageing.

SILASTIC™ MS-1003 Moldable Silicone

Features of SILASTIC™ MS-1003 Moldable Silicone

  • Two-part 1:1 mixing ratio
  • Lighter than glass
  • High luminous transmittance
  • Low chromatic dispersion
  • Low haze and scatter
  • Better heat and intrinsic UV resistance than optical grade plastics
  • Less yellowing than plastics
  • Low pressure liquid injection molding
  • Excellent surface feature replication
  • Easily molded into complex shapes optics
  • Low hardness
  • Designed for free form lenses with severe draft angle
  • Enabling good sealing of optics into a lighting fixture
  • High transmittance in deep UV, down to ca. 270nm
  • UL 94, UL 746A, UL 746C(f1)(f8)


  • Injection or compression molding for primary or secondary lenses, light pipes, light guides and other optic devices

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