CoolTherm® SC-324 XLW Thermally Conductive Silicone Encapsulant Where to Buy
Product Information
LORD CoolTherm® SC-324 XLW thermally conductive silicone encapsulant is a two-component system designed to provide excellent thermal conductivity for electrical/electronic encapsulating applications, while retaining desirable properties associated with silicones.
Shelf Life
Shelf life is six months for CoolTherm SC-324 resin and three months for CoolTherm SC-324 XLW hardener when stored at 25°C in original, unopened container.
CoolTherm SC-324 XLW encapsulant evolves minute quantities of hydrogen gas. Do not repackage or store material in unvented containers. Adequately ventilate work area to prevent the accumulation of gas.
Features and Benefits
Low Stress – exhibits low shrinkage and stress on components as it cures.
Durable – composed of an addition-curing polydimethyl siloxane polymer that will not depolymerize when heated in confined spaces.
Low Viscosity – maintains low viscosity for ease of component encapsulation compared to other highly thermal conductive materials.
Environmentally Resistant – provides excellent thermal shock resistance and flame retardancy.
Uncured Typical Properties*
| Mixed Appearance | Light Pink Liquid |
| MIxed Viscosity, cP @ 25°C | 27,000 |
| Mixed Specific Gravity | 3.2 |
| Working Life, hr @ 25°C | 6 |
Cured Typical Properties*
| Volume Resistivity, ohm-cm @ 25°C | >2 x 1013 |
| Thermal Conductivity, W/m·K | 4.0 |
| Coefficient of Linear Thermal Expansion, ppm/°C | 65 |
| Hardness, Shore A | 20 |
| Tensile Strength, MPa (psi) | 0.31 (45) |
| Elongation at Break, % | 15 |
| Moisture Absorption, % | < 0.1 |
| Dielectric Strength, kV/mm (V/mil) | 7.4 (188) |
| Dielectric Constant, @ 25°C | 5.5 |
| Dissipation Factor, % @ 25°C | <1 |
| Extractable Ionic Contaminants |
Chloride = <10 Sodium = <10 Potassium = <10 Ammonium = <10 Bromide = <10 Sulfate = <10 |
*Data is typical and not to be used for specification purposes.
Cure schedule of 60 minutes at 125°C.
Literature
| Download | Type | Name | |
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| Safety Data Sheet | CoolTherm SC-324 Resin | |
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| Safety Data Sheet | COOLTHERM SC-324 XLW HARDENER | |
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Technical Data Sheet | CoolTherm SC-324 XLW Thermally Conductive Silicone Encapsulant | |
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Addition-Cure Silicone Encapsulant Inhibition Guide | ||
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CoolTherm SC-324 XLW Silicone Encapsulant Handling/Application Notes |