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CoolTherm™ EP-636 Epoxy Encapsulant Where to Buy

Product Information

LORD CoolTherm™ EP-636 epoxy encapsulant is a two-component system specifically designed for high temperature applications. CoolTherm EP-636 encapsulant is recommended for encapsulation of electric motor stator assemblies used on downhole oil pumps.

Shelf Life

Shelf life is one year for CoolTherm EP-636 resin and two years for CoolTherm EP-636 hardener from date of manufacture when stored at 25°C in original, unopened container. CoolTherm EP-636 resin must be periodically rotated within its container to maintain maximum shelf life. Settling will occur if not mixed.

CoolTherm EP-636 hardener may crystallize during shipment or storage. If crystals appear, gently warm hardener at 50-65°C to melt crystals before mixing with resin.

Features and Benefits

High Temperature Electrical Performance – maintains electrical insulation stability at extremely high temperatures.

Environmentally Resistant – provides protection of electrical devices exposed to harsh environmental conditions.

Durable – exhibits very low weight loss over extended periods at elevated temperatures.

Uncured Typical Properties*

Mixed Appearance Gray Liquid
Mixed Viscosity, cps @ 25°C 50,000
Mixed Specific Gravity 1.58
Gel Time, min @ 93°C 30
Working Life, days @ 25°C 1-2
Cure Time 16-24 hr @ 50-65°C, followed by 2 hr each @ 95°C, 150°C and 205°C

Cured Typical Properties*

Volume Resistivity, ohm-cm @ 25°C 5.6 x 1015
Coefficient of Linear Thermal Expansion, ppm/°C 35
Glass Transition Temperature (Tg), °C 180
Hardness, Shore D 95
Tensile Strength, MPa 42.7
Dielectric Strength, V/mil 464
Dielectric Constant, @ 25°C 3.62
Dissipation Factor, @ 25°C 0.023

*Data is typical and not to be used for specification purposes.
Cure schedule of 24 hours at 65°C plus 2 hours each at 95°C, 150°C and 205°C.


Download Type Name
Download Technical Data Sheet CoolTherm EP-636 Epoxy Encapsulant