Momentive INVISISIL™ OP4921 is a one-component UV-curable silicone DAM material used for perimeter sealing in display and optical modules. It cures quickly under UV exposure to form a medium-hardness, transparent silicone rubber with excellent shock absorption and corrosion resistance, making it well-suited for larger display structures requiring stable damming performance.
Momentive INVISISIL™ OP4921 Features
Convenient one-component formulation
High transparency with >99% transmittance
High viscosity suitable for controlled application
UV curable with rapid curing response
9-month shelf life at 23°C
Excellent shock and vibration absorption
Corrosion-resistant silicone formulation
Designed for larger-size display applications
Momentive INVISISIL™ OP4921 Applications
DAM material for optical display modules
Edge sealing in large-format displays
Shock-absorbing perimeter sealant for electronics
About Prostech
Prostech offers specialty materials (adhesives, tapes, thermal interface materials, insulating materials, sealants, PCB protection materials, …) along with manufacturing solutions. We proudly serve a wide range of industries and are an authorized distributor for leading global manufacturers of industrial materials and equipment. Our product range is designed to deliver customized solutions that address each customer’s unique needs.
With years of experience and a successful project history, we are confident in our ability to provide comprehensive material solutions. These solutions effectively tackle the challenges manufacturers face. To explore our full product catalog, simply click here. Our dedicated team is ready to assist with:
Provide quotation, sample, TDS/MSDS, and technical consultation
Testing sample quality and verifying product compatibility in our laboratory
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Adapting product sizes, quantities, and packaging to meet specific needs
Offering expert advice on suitable equipment and automation processes
Delivering technical training and on-site support for optimal product use
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Property
Value
Product Name
INVISISIL™ OP4921
Type
One-component soft silicone rubber DAM material
Mix Ratio by Weight
One component
Appearance
Clear, transparent
Transparency
> 99%
Haze
< 0.5
Yellowness Index
< 0.5
Density (23 °C)
0.97 g/cm³
Viscosity (10 1/s, 20 °C)
350 Pa·s
Cure Conditions
4000 mJ/cm² UV + 2 min @ RT (Fe-doped metal halide with black filter) + 30 min @ 70 °C
