• Item Name: INSULCAST 140 FR
• Manufacturer: ITW Performance Polymers
• Technologies: Two-component epoxy with INSULCURE 11B, heat-castable, Class F operating properties
• Color: INSULCAST 140 FR – Black, INSULCURE 11B – Amber
• Cure Type: Heat cure with post-cure option
• Package Size: Contact to Techniq VN for details.
• Shelf Life: 12 months
INSULCAST 140 FR is a high–thermal-conductivity epoxy casting compound designed for demanding heat dissipation applications. When used with INSULCURE 11B hardener, it achieves Class F thermal performance and meets UL94V-1 flammability requirements. Its heavily filled formulation offers superior mechanical strength, excellent electrical insulation, and stability across a wide service temperature range. Ideal for castable heat sink applications, the system provides durability and robust thermal management for electronic assemblies.
Castable heat sinks for electronic components
High thermal conductivity encapsulation
Electrical insulation requiring stable performance up to 155°C
Potting of power devices, transformers, and coils
Applications requiring UL94V-1 flame resistance and Class F rating
| Property | INSULCAST 140 FR | INSULCURE 11B | Mixed |
|---|---|---|---|
| Color | Black | Amber | — |
| Viscosity (cPs) | 220,000 | 700 | 50,000 @ 60°C |
| Specific Gravity | 2.60 | 0.95 | — |
| Mix Ratio (by wt.) | — | — | 100 : 3–4 |
| Pot Life @ 25°C | — | — | 2.5 hrs |
| Shelf Life @ 25°C | 12 months | 12 months | — |
| Property | Value |
|---|---|
| Hardness (Shore D) | 90–95 |
| Tensile Strength | 8,500 psi (58.6 MPa) |
| Tensile Elongation | <1% |
| Compressive Strength | 18,000 psi (124.1 MPa) |
| Flexural Strength | 13,500 psi (93.1 MPa) |
| Thermal Conductivity | 2.3 W/mK |
| CTE | 26×10⁻⁶ m/m·K |
| Heat Distortion Point | 155°C |
| Service Temperature | –55 to 155°C |
| Dielectric Strength | 420 V/mil |
| Dielectric Constant (1 kHz) | 6.3 |
| Volume Resistivity | 1×10¹⁵ ohm-cm |
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