COOLTHERM EP-6009
Harmonization Code : 3910.00.00.90 | Silicones in Primary Forms; Others

Main features
- 2,600 cP Mixed Viscosity
- 0.7 W/(m K) Thermal Encapsulation
- Electrically Insulating Encapsulation
Product Description
CoolTherm® EP-6009 Epoxy Encapsulant is a two-component epoxy system designed to provide thermal conductivity for potting applications requiring flame retardance. The black mixed material combines a typical viscosity of 2,600 cP at 25°C with a 60-minute working life, supporting application through handheld cartridges or automatic meter/mix/dispense equipment. After cure, the system provides typical thermal conductivity of 0.7 W/m·K together with electrical insulation and rigid mechanical properties.
Key features
- Thermally conductive encapsulation: Provides a typical cured thermal conductivity of 0.7 W/m·K for potting applications requiring heat dissipation.
- Low mixed viscosity: The mixed system has a typical viscosity of 2,600 cP at 25°C to support dispensing and flow during encapsulation.
- Electrical insulation: Provides typical volume resistivity of 1.0 × 1015 ohm-cm at 25°C and dielectric strength of 500 V/mil after cure.
Applications / Suitable for
- Thermally conductive potting applications requiring flame retardance
TDS, SDS & Technical Documents
Technical Specifications
General Properties
Physical Properties
Thermal Properties
Electrical Properties
Mechanical Properties
Chemical Properties
Additional Information
As-supplied / before-processing properties
Typical properties of the CoolTherm EP-6009 BLK resin, EP-6009 hardener, and mixed encapsulant before cure. Values are not intended for specification purposes.
| Property | Value | Unit | Method / condition |
|---|---|---|---|
| Appearance | Black liquid / Amber liquid / Black liquid | — | EP-6009 BLK resin / EP-6009 hardener / mixed system |
| Viscosity | 17,500 / 40 / 2,600 | cP | EP-6009 BLK resin / EP-6009 hardener / mixed system at 25°C; test method not stated |
| Specific gravity | 1.65 / 1.00 / 1.52 | — | EP-6009 BLK resin / EP-6009 hardener / mixed system; test conditions not stated |
| Mix ratio by weight | 10:1 | Resin:hardener | CoolTherm EP-6009 BLK resin : CoolTherm EP-6009 hardener |
| Gel time | 28 | minutes | Mixed system at 65°C; test method not stated |
| Working life | 60 | minutes | Mixed system at 25°C; test method not stated |
| Cure time | 2–4 | hours | At 65°C after the material reaches the target temperature |
| Shelf life | 1 | year | Each component from date of manufacture when stored at 25°C in the original, unopened container |
After-processing / final-state properties
Typical cured properties of the CoolTherm EP-6009 BLK resin and EP-6009 hardener system. The documented cure schedule is 2–4 hours at 65°C after the material reaches the target temperature. Values are not intended for specification purposes.
| Property | Value | Unit | Method / condition |
|---|---|---|---|
| Thermal conductivity | 0.7 | W/m·K | Test method not stated |
| Coefficient of linear thermal expansion | 47 | ppm/°C | Test method and temperature region not stated |
| Glass transition temperature | 75 | °C | TMA |
| Hardness | 90 | Shore D | Test method not stated |
| Tensile strength | 48.3 (7,000) | MPa (psi) | ASTM D638 |
| Elongation at break | 1.9 | % | ASTM D638 |
| Moisture absorption | 0.35 | % | 10 days at 25°C; exposure medium and test method not stated |
| Volume resistivity | 1.0 × 1015 | ohm-cm | ASTM D257 at 25°C |
| Dielectric strength | 500 | V/mil | Test method and specimen thickness not stated |





















