Item Name: BERGQUIST LIQUI BOND TLB SA3500 (Also known as BERGQUIST LIQUI-BOND SA 3505)
Manufacturer: Henkel
Technologies: Thermally conductive, two-part liquid silicone adhesive
Color: Part A – Brown, Part B – Light gray, Mixed – Light brown
Cure Type: Heat cure
Package Size: Contact to Techniq VN for details.
Shelf Life: 6 months
BERGQUIST LIQUI-BOND TLB SA3500 is a thermally conductive, two-part liquid silicone adhesive formulated for thermal management. With a thermal conductivity of 3.5 W/m·K, it delivers high bonding strength, reliability under severe environmental conditions, and eliminates the need for mechanical fasteners. Once heat-cured, it forms a robust elastomer with mild elasticity, reducing CTE stresses during thermal cycling. The adhesive can be dispensed in varied thicknesses and is available with optional glass spacer beads for consistent bond lines and dielectric integrity.
Power supplies requiring efficient thermal transfer.
Discrete components to heat spreaders for structural and thermal bonding.
PCBA-to-housing assemblies with thermal management needs.
| Property | Still Not Mixed (Uncured) | After Mixed / Cured |
|---|---|---|
| Appearance | Part A: Brown / Part B: Light gray | Mixed: Light brown |
| Mix Ratio | 1:1 | – |
| Viscosity (ASTM D5099) | Part A: 45 Pa·s / Part B: 30 Pa·s | – |
| Density (ASTM D792) | 2.9 g/cc | – |
| Pot Life @ 25 °C | 240 min | – |
| Shelf Life | 6 months @ 25 °C | – |
| Cure Schedule | 20 min @ 125 °C or 10 min @ 150 °C | – |
| Hardness (ASTM D2240) | – | 90 Shore A |
| Dielectric Strength (ASTM D149) | – | 10,000 V/mm |
| Dielectric Constant (ASTM D150 @1kHz) | – | 6.9 |
| Volume Resistivity (ASTM D257) | – | 1×10¹⁰ Ω·m |
| Thermal Conductivity (ASTM D5470) | – | 3.5 W/m·K |
| Shear Strength (ASTM D1002) | – | 3.15 MPa (450 psi) |
| Operating Temperature | – | -60 to 200 °C |
| UL Flammability | – | UL 94 V-0 |
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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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At Techniq, our mission is to connect cutting-edge materials, processes, and equipment with customer needs, enabling efficiency, reliability, and long-term value creation.
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