• 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
  • RoHS/REACh compliant


  • 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

Product Details

Property Average Result
Viscosity 360 cP (360 mPa*s)
Appearance Clear
Cure 30 minutes / 150 °C
Durometer 25 Type 00
Refractive Index 1.52
Specific Gravity 1.07
Comment 1.52 Refractive Index firm gel for encapsulating LEDs, and to reduce lightloss for other optical applications.

Specialty Silicones for Displays

The NuSil® line of optoelectronic silicones enable device manufacturers from smart phones to stadium screens and everything in between to create next-generation displays that are sharper, brighter and more rugged.

Read more

The test data shown for this material is the average value for typical properties. All of these properties may not be tested on a lot to lot basis and cannot be used to draft specifications. Please contact NuSil for assistance and recommendations in establishing limits for product specifications.