Parker Lord CoolTherm EP-3500 Hardener is a component of the CoolTherm EP-3500 two-part thermally conductive epoxy system designed for battery packs, power electronics, and thermal management applications. When mixed with the corresponding resin, it forms a durable, electrically insulating material that provides excellent heat transfer, strong adhesion, and long-term environmental resistance. It is commonly used in electric vehicle, aerospace, and industrial electronic assemblies requiring efficient thermal dissipation.