Master Bond's UV15RCL epoxy is a low viscosity, cationic type UV curing system with a special color changing feature.

Features a red material that changes to clear once exposed to UV light, indicating that there is UV light access across the adhesive material. Cures under UV light in around 30-60 sec. with a broad-spectrum UV lamp emitting light with a wavelength range between 320-365nm and a minimum required energy of 20-40 milliwatts per cm². Features a high glass transition temperature (Tg) of 90-95°C and when post cured for 1-2 hr. at 125°C, Tg can increase to 125-130°C. Has a service temperature range from -80°F to +350°F, cures tack free and has a very low viscosity of 115-350cps, making it ideal for spin coating. Is not oxygen inhibited and provides light transmission properties and good optical clarity, with a refractive index of 1.517.Is also said to be an excellent electrical insulator with a volume resistivity exceeding 1014ohm-cm.

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