Polyurethane has excellent electrical insulating properties and is used successfully in many moulded wire and cable harness assemblies. Having the ability to be produced in a range of colours and flexibility polyurethane is ideal for use in cable manufacturing.

Continuous use above 225°F is not recommended nor is urethane recommended in hot water over 175°F. At low temperatures, polyurethane will remain flexible down to -90°F. A gradual stiffening will occur at 0°F, but will not become pronounced until much lower temperatures are obtained.