Momentive InvisiSil IVS9520 Transparent Silicone

Designed for lens formation of COB (chip on board) LEDs and SMD (surface mounted device) LED packages this thixotropic, transparent silicone rubber has low viscosity that means it can be dispensed in a controlled and consistent way to form dome shapes. InvisiSil IVS9520 is a two-part heat-curable glob top encapsulant which provides excellent UV and temperature stability - even under harsh environmental conditions. It can enhance the durability and reliability of devices by providing long-term resistance to yellowing and delamination of the encapsulant from the substrate.

Key Features:

  • Self-Dome Lens Formation
  • High Transparency
  • No Yellowing
  • Excellent High and Low Temperature Resistance
  • UV Resistance
  • Excellent Adhesion
  • Thixotropic Consistency

What is InvisiSil IVS9520 used for?

  • Lenses for Chip on Board (COB) LED's
  • Surface Mounted Device (SMD) LED Packages
  • Optical Devices for Lenses

For more information on this product or others in the InvisiSil range contact Techsil on

InvisiSil Silicones for LED Applications

InvisiSil optical silicones offer both optical clarity and protection required by advanced optical applications, including LED lighting materials. Delivering high optical stability and light transmittance. The range includes:

    • Display optical bonding
    • OLED encapsulants
    • Potting silicones

This range has been engineered to reduce surface reflection and improve light transmission - which means better readability in sunlight and bright ambient light.

They help shield electronics from the thermal shock of on-off cycling and reduce structure stress. Testing under prolonged heat exposure has shown an InvisiSil LED encapsulant to maintain non-yellowing light transmittance more effectively than the LED-grade epoxy substrate to which it was bonded. Tests have also indicated excellent UV stability and enduring transparency performance. As a passivation layer, InvisiSil encapsulants can help protect electronics against moisture, chemical agents and physical impact. With high purity, low viscosity, low volatile outgas and mild thermal cure, these silicones help our customers simplify their processes.

InvisiSil Snap Cure Silicones

Momentive’s new InvisiSil Snap Cure systems further improve processability by curing rapidly at room temperature without the need for UV exposure. This unique material design can eliminate the problem of shadow cure, while enabling users to rework materials for up to two days. And because the material cures at room temperature, it may mitigate CTE mismatch while experiencing shrinkage of less than 0.5% during cure, reducing the chance that thin panels will warp and cause "mura" defects.

InvisiSil products also aid sustainability efforts by protecting low energy consumption LED packaging from harsh environments while maintaining optical performance for an extended lifetime.

They are available in many formulations that can integrate seamlessly into modern assembly systems. With low conductivity and chemical reactivity, thermal stability and the ability to form watertight seals, InvisiSil silicones are ideal for optical bonding. They are available in a range of curing formulations to allow maximum design flexibility while offering long-term reliability to manufacturers of optical displays.

The Momentive InvisiSil silicone range helps manufacturers create innovative solutions to engineering and production challenges in the LED, photonics, automotive, medical, aerospace, marine, defence and electronics industries.

Typical applications include:

  • Marine navigation, sonar and instrumentation displays
  • Mobile phones, tablets and eBook readers
  • Digital signage and large screen displays
  • Automotive instrument panels
  • Car Navigation screens and in-dash entertainment systems
  • Rear-view mirrors
  • Seat-back and flip-down video screens
  • Marine-grade displays and instruments
  • Ruggedized tablets and wearable displays
  • Law enforcement and military grade computers

Contact us for more information on the InvisiSil range at