Industries

BERGQUIST® GAP FILLER TGF 2900LVO – Low Viscosity Thermally Conductive Gap Filler – Electronics and Power Modules

  • Item Name: BERGQUIST® GAP FILLER TGF 2900LVO
  • Manufacturer: Henkel
  • Product Category: Thermal gap filler
  • Technologies: Silicone-based, 2-part gap filler
  • Applications: Automotive control modules, high-throughput manufacturing, applications sensitive to siloxane outgassing, and heat transfer optimization
  • Color: Part A – Blue, Part B – White, Cured – Pale Blue
  • Cure Type: Room temperature cure or heat cure
  • Package Size: Cartridges (50cc, 400cc, 1200cc), Pail (6 gallons)
  • Shelf Life: 9 months

1. Product Overview

BERGQUIST® GAP FILLER TGF 2900LVO is a 2-part, silicone-based, thermally conductive gap filler designed for electronic assembly applications. It features low volatile outgassing (LVO), excellent slump resistance, and outstanding dispensing behavior. With a thermal conductivity of 2.9 W/(m.K) and an ability to achieve ultra-thin bondline thickness, it is suitable for high-performance thermal management.

Key Benefits:

  • Thermal conductivity: 2.9 W/(m.K)
  • Low volatile outgassing (LVO)
  • Outstanding slump resistance
  • Suited for ultra-thin bondline thickness
  • Low abrasiveness & high storage stability
  • Excellent dispensing flow behavior

Curing Options:

  • Room temperature cure
  • Heat cure

2. Applications

  • Automotive control modules
  • High-throughput manufacturing
  • Electronics sensitive to siloxane outgassing
  • Applications requiring ultra-thin bondlines for optimized heat transfer

3. Typical Properties

Before Mixing (Uncured Material)

Property Part A Part B
Appearance Blue White
Viscosity (Low shear, 1.0 s⁻¹), Pa·s 1,300 1,300
Viscosity (High shear, 1,500 s⁻¹), Pa·s 54 51
Shelf Life @ 25°C 270 days 270 days

Mixed Properties

Property Value
Mix Ratio (Weight & Volume) 1:1
Bondline Thickness 35 µm
Density (ASTM D792) 2.97 g/cc
Working Time @ 25°C 120 min
Working Time @ 40°C 20 min

Curing Performance (ASTM D4473)

Temperature Cure Time
25°C 12 hours
40°C 180 minutes
100°C < 5 minutes

After Curing (Physical Properties)

Property Value
Hardness (Shore 00, ASTM D2240) 55
Heat Capacity (ASTM D1269) 0.94 J/(g.K)
Flammability (UL 94) V-0

Electrical Properties

Property Value
Dielectric Constant (ASTM D150 @ 0.1-20 GHz) 6.78
Volume Resistivity (ASTM D257) 1×10¹⁰ Ω.m
Dielectric Strength (ASTM D149) > 9 kV/mm

Thermal Properties

Property Value
Thermal Conductivity (ASTM D5470) 2.9 W/(m.K)
Thermal Resistance @ 0.2 mm 1.2 (K.cm²)/W
Thermal Resistance @ 1.0 mm 3.7 (K.cm²)/W
Thermal Resistance @ 2.0 mm 7.2 (K.cm²)/W

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