UR5634 Optically Clear Polyurethane Resin

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A two-part, semi-rigid polyurethane resin which is a carefully selected blend of components specifically formulated to be optically clear, making it ideal for LED encapsulation or potting. Its water-white transparency makes it an excellent choice for use in both decorative and protective applications in the LED luminaires industry.

It exhibits superb weather resistance, as well as good resistance to acids and alkalis making it suitable for a wide range of environments and an extremely durable potting and encapsulation compound for use in a wide range of applications.


Approvals RoHS Compliant (2015/863EU): Yes
UL Approval: No
Typical Properties
Liquid Properties: Base Material Polyurethane
Density Part A – Resin (g/ml) 1.06
Density Part B – Hardener (g/ml) 1.16
Part A Viscosity (mPa s @ 23ºC) 900
Part B Viscosity (mPa s @ 23ºC) 1200
Mixed System Viscosity (mPa s @ 23ºC) 1050
Mix Ratio (Weight) 0.92:1
Mix Ratio (Volume) 1:1
Usable Life (20°C) ~15 mins
Gel Time (23°C) ~20 mins
Cure Time (23 °C) 24 hours
Cure Time (60 °C) 4 hours
Colour Part A – Resin Clear
Colour Part B – Hardener Clear
Storage Conditions Dry Conditions: Above 5ºC, Below 30ºC
Shelf Life 12 months
Shrinkage < 1%

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