UR5623 White Polyurethane Resin

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This two part white polyurethane potting and encapsulation compound is formulated as a high performance resin especially for electronics industry. Its a tough resin with exceptional adhesion to a wide range of substrates with UL approval for fire resistance making it an ideal choice for cable jointing applications.

It is particularly good for applications where there are stringent temperature cycling or thermal shock requirements.

Ideal for cable jointing, casting, coil impregnation, PCB encapsulation, transformers, alarms and battery terminations


Approvals RoHS Compliant (2015/863/EU): Yes
UL Approval: Meets UL94 V-0
Typical Properties
Liquid Properties: Base Material Polyurethane
Density Part A – Resin (g/ml) 1.65
Density Part B – Hardener (g/ml) 1.24
Part A Viscosity (mPa s @ 23ºC) 20000
Part B Viscosity (mPa s @ 23ºC) 50
Mixed System Viscosity (mPa s @ 23ºC) 2000
Mix Ratio (Weight) 6.93:1
Mix Ratio (Volume) 5.18:1
Usable Life (20°C) 30 mins
Gel Time (23°C) 60 mins
Cure Time (23°C) 24 hours
Cure Time (60°C) 3 hours
Colour Part A – Resin White
Colour Part B – Hardener Dark Amber
Storage Conditions Dry Conditions: Above 15ºC, Below 30ºC
Shelf Life 12 months
(Measured on 100ml sample in a cylinder of diameter 49.4mm @ 20-25ºC) < 35ºC
Shrinkage < 1%

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