Polymer Systems
Technology Limited

Advanced Engineering




Optically Clear Silicone Gel

  • Two-part, 1:1 Mix Ratio (Part A: Part B)
  • 1.52 refractive index for matching BK7
  • Cures with heat via addition-cure chemistry and will cure at room temperature
  • For protection of sensitive photonics assemblies from mechanical shock, thermal shock, dust, and ambient atmosphere.
  • Low viscosity reduces voids in complex assemblies to fill in and permits time for any trapped air bubbles to float to the fluid surface and escape.
  • For applications requiring optically clear materials with a refractive index of 1.52 at 589 nm
  • For LEDs and display assembly
Typical PropertiesResult
Viscosity (initial Part A and Part B mixed)360 cP
Viscosity at 3 hours after catalyzation< 4,000 cP
Cured: 30 minutes at 150°C (302°F)
Durometer, Type 0025
Specific Gravity1.07
Refractive Index, 589 nm1.52
Moisture Absorption, % gain after 168 hour exposure at 85°C (185°F) / 85% R.H. < 0.2 %
Cured: 24 hours at ambient temperature and humidity 
Durometer, Type 00065
Transmittance vs. Wavelength (25°C)*See Appendix
Refractive Index vs. Wavelength (25°C)* See Appendix
Refractive Index vs. Temperature by Wavelength* See Appendix

Recommended Primers CF2-135 - SP-120 - SP-271

Note: Some bonding applications may require the use of a primer.
CF2-135 is recommended for most metallic substrates, some plastics and when cure inhibition is observed on substrate.
SP-120 is recommended for PPA and SP-271 is recommended for PMMA.


50 ml SxS Kit
2 Pint Kit (910 g)
2 Gallon Kit (7.28 kg)


12 Months

Product Profile - Full Details Product Profile
Safety Data Sheet Material Safety Data Sheet
Example packaging
Example packaging


Medical Silicones
Biomaterials - Medical Silicones for Healthcare

Advanced Technologies

Advanced Technologies Industrial & Engineering Silicones
Space - Aviation Grade Industrial & Engineering Silicones


Food Medical Industrial Grade Silicone Tubing
Food, Medical & Industrial Quality Silicone Tubing


Silicone Mixing Dispensing Degassing Equipment
Mixing Dispensing & Degassing Equipment for Silicone