• Item Name: DOWSIL™ TC-4060 GB250 Thermal Gel
• Manufacturer: Dow
• Technologies: Two-part silicone thermal gel (addition-cure, PDMS-based, highly thermally conductive)
• Color: Part A – White, Part B – Blue
• Cure Type: Room temperature cure, heat accelerated
• Package Size: Contact to Techniq VN for details.
• Shelf Life: 12 months
DOWSIL™ TC-4060 GB250 is a two-part, room-temperature curing silicone gel with 6–6.5 W/m·K thermal conductivity. It contains high-purity glass beads (250 μm) (with a GB-free option available). Once cured, it forms a soft, stress-relieving, and shock-damping elastomer designed for automotive and telecom thermal management. It cures without exotherm, is stable up to 150°C, and provides long-term dielectric insulation and mechanical protection.
Heat dissipation in automotive ECUs and telecom PCB assemblies
Gap-filling & stress relief between components and heat sinks
Reliable cooling solution with shock and vibration damping
Compatible with automated dispensing using meter-mix equipment
| Property | Unit | Part A | Part B | Mixed | Cured |
|---|---|---|---|---|---|
| Mix Ratio | – | – | – | 1:1 | – |
| Appearance | – | White | Blue | – | – |
| Viscosity @1s⁻¹ | mPa·s | 390,000 | 460,000 | 426,000 | – |
| Viscosity @10s⁻¹ | mPa·s | 140,000 | 140,000 | – | – |
| Specific Gravity | – | 3.5 | 3.5 | – | – |
| Pot Life (22°C) | min | – | – | 80 | – |
| Cure Time | h/min | – | – | 24 h @22°C / 30 min @80°C | – |
| Durometer | Shore 00 | – | – | – | 55–58 |
| E’ Modulus (DMA) | MPa | – | – | – | 0.2 |
| Tensile Strength | MPa | – | – | – | 0.05 |
| Thermal Conductivity | W/m·K | – | – | – | 5.6 – 6.5 |
| CTE | ppm/°C | – | – | – | 233 ± 59 |
| Volatile Siloxane Content | ppm | – | – | – | < 100 |
| Dielectric Strength | kV/mm | – | – | – | 8.5 |
| Volume Resistivity | ohm·cm | – | – | – | 4 × 10¹² |
| Dielectric Constant (10 MHz–20 GHz) | – | – | – | – | 7.78 |
| Flammability (UL-94) | – | – | – | – | V-0 |
| Comparative Tracking Index (IEC 60112) | V | – | – | – | > 600 |
| Shelf Life (<40°C) | days | – | – | – | 360 |
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Techniq Vietnam provides end-to-end materials and process solutions, integrating world-class technologies in adhesives, soldering, and thermal management.
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