UR5641 is an optically clear flexible polyurethane resin, with the added bonus of having excellent flame retardant properties. Due to its exceptional properties it makes it suitable for the protection of LED luminaires which are located in hazardous environments. The resin system is based on halogen free aliphatic chemistry ensuring that cured UR5641 is resistant to the yellowing effects of UV light, making it useful in exterior as well as interior applications.Key Properties:Water white transparencyFlame retardantResistant to UV yellowingExcellent for the protection of LED's in hazardous environmentsHalogen freeRoHS-2 Compliant