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DOWSIL™ TC-4060 GB250 Thermal Gel – Thermal Gel – Automotive & Telecom Applications

  • Item Name: DOWSIL™ TC-4060 GB250 Thermal Gel
  • Manufacturer: Dow Chemical Company
  • Technologies: Silicone-based thermally conductive gel
  • Color: White/Blue (Part A/B)
  • Cure Type: Room temperature cure with optional heat acceleration
  • Package Size: Contact to Avantek for details.
  • Shelf Life: 12 months

1. Product Overview

DOWSIL™ TC-4060 GB250 is a two-part, high-performance silicone-based thermal gel with a 1:1 mix ratio. It offers excellent thermal conductivity (6 W/m.K) and is designed for efficient heat dissipation in electronic and automotive applications. The gel provides stress relief, shock damping, and long-term stability under thermal cycling up to 150°C. It cures at room temperature with an option for accelerated heat curing and is suitable for automated dispensing.

2. Applications

  • Used in automotive and telecom applications for heat dissipation from PCB components to heat sinks.
  • Ensures a smooth assembly process and is compatible with automated dispensing systems.
  • Acts as a stress-relieving and shock-damping material after curing.
  • Provides electrical insulation and protection against environmental contaminants.

3. Typical Properties

Before Mixing (Uncured Components)

Property Unit Part A Part B
Appearance White Blue
Viscosity (1s⁻¹) mPa·s 390,000 460,000
Viscosity (10s⁻¹) mPa·s 140,000 140,000
Specific Gravity 3.5 3.5
Mix Ratio 1:1 1:1

After Mixing (Cured Properties)

Property Unit Result
Mixed Viscosity (1s⁻¹) mPa·s 426,000
Cure Time at 22°C Hours 24
Cure Time at 80°C Minutes 30
Pot Life at 22°C Minutes 80
Hardness (Shore 00, after 24h at 25°C) 55
Hardness (Shore 00, after 1h at 110°C) 58
Thermal Conductivity (ISO 22007-2) W/m·K 6.5
Thermal Conductivity (ASTM D5470) W/m·K 5.6
Volume Resistivity Ohm·cm 4E+12
Dielectric Strength kV/mm 8.5
Flammability Rating (UL-94) V-0
Shelf Life (≤40°C) Months 12

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