Master Bond formulates many optically clear compositions including epoxies, urethanes, silicones, cyanoacrylates and polyester resin based materials. Spectral transmission ranges of 300 nanometers to excess of 2,000 nanometers are available. Typical optical transmission measurements in the most widely used 300-400 nanometer range are greater than 90%.
Special Properties of Optically Clear Formulations
Master Bond's optically clear polymer compounds are widely used in coating, bonding, encapsulating and impregnating applications. Formulations are available that provide:
- Dimensional stability
- Low shrinkage
- Outstanding chemical and water resistance
- Abrasion resistance
- Low outgassing properties
- Range of refractive indexes
- Resistance to 1,000 hours exposure to 85°C/85% humidity
Cure Methods for Optically Clear Coatings, Adhesives & Encapsulants
Our optically transmissive materials feature service temperatures from as high as 600°F (
- Catalytic cures at ambient or elevated temperatures
- Exposure to UV or visible light cures
- High energy radiation cures
- Moisture cures
Some of Master Bond’s Most Popular Optically Clear Systems
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Super Gel 9 Two part, room temperature curing, epoxy gel compound for sealing and encapsulation. Optically clear, soft and dimensionally stable. Ideal for retrievability. Two to one mix ratio by weight or volume. Low exotherm. Long working life. Low viscosity system. Unsurpassed thermal cycling and mechanical shock resistance. Used in conjunction with sensitive electronic and optical components. Serviceable from -100°F to +200°F. |
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EP30LV-1 Ultra low viscosity epoxy system. Cures at room temperature. Outstanding optical clarity. Electrically insulative. High strength rigid bonds. Fills gaps in confined areas. Serviceable from -60°F to +250°F. |
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EP29LPSP Two part epoxy system with ultra low viscosity and remarkable cryogenic properties. Withstands rapid drop in temperature and is NASA low outgassing approved. Optically clear. Long working life. Low exotherm. Excellent resistance to acids, bases and many solvents. Outstanding electrical insulative properties. Service operating temperature range from 4K to +275°F. |
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EP21LSCL-2 Superb optical clarity. Non-yellowing properties. Two component low viscosity epoxy resin system. Long working life. Excellent electrical insulator. Used for large volume potting applications. Serviceable from -60°F to +250°F. |
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UV10TKLO-2 Optically clear, easy to apply UV curable system. Meets NASA low outgassing specifications. Superior electrical insulative properties. High physical strength properties and superior chemical resistance. Vacuum compatible. Serviceable from -60°F to +400°F |
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EP37-3FLF Highly flexible, low viscosity, optically clear adhesive. Resistant to severe thermal cycling and thermal shock. Bonds well to dissimilar substrates. Low exotherm system. Long working life. Superior electrical insulation properties. Service temperature range from 4K to +250°F. One to one mix ratio by weight or volume. |
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MasterSil 323 Two part silicone paste for bonding, sealing and encapsulating applications. Optically clear in thin sections. Outstanding flexibility. Contains no solvents or diluents. Low to moderate viscosity. Low dielectric constant. Addition cured, no by-products released during cure. Serviceable from -65°F to +400°F. |
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EP121CL-LO NASA low outgassing approved two component epoxy. Low viscosity system. High dielectric strength. Optically clear. Withstands 1,000 hours 85°C/85% RH. Shore D hardness 80-90. Serviceable from -80°F to +500°F. Long open time at room temperature. |
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EP21H Two component optically clear epoxy system. Special cross linking profile that allows for exceptional light transmission in the 250-365 nm spectra Long pot life. Low viscosity. Excellent physical strength properties. Serviceable from -60°F to +250°F. |
