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LOCTITE 3616 – Red epoxy adhesive for bonding SMDs to PCBs before wave soldering in electronics.

  • Item Name: LOCTITE 3616
  • Manufacturer: Henkel
  • Product Category: Surface mount adhesive
  • Technologies: Epoxy
  • Applications: Bonding SMD components to PCBs and small parts; optimized for stencil printing with high wet strength and fast cure
  • Color: Red viscous paste
  • Cure Type: Heat cure
  • Package Size: Contact Techniq VN for details.
  • Shelf Life: Contact Techniq VN for details

1. Product Overview

  • Technology: Epoxy
  • Chemical Type: Epoxy
  • Appearance: Red viscous paste
  • Components: One-component (no mixing required)
  • Cure Method: Heat cure
  • Application: Surface mount adhesive
  • Key Substrates: SMD components to PCB
  • Other Uses: Small parts bonding
  • Dispense Method: Stencil print
  • Wet Strength: High

2. Applications

  • Bonding surface-mounted devices (SMD) to printed circuit boards (PCB) before wave soldering
  • Suitable for printing a range of dot heights with one stencil thickness
  • Designed for high wet strength and fast print speeds

3. Typical Properties

Uncured Properties
Property Value
Specific Gravity (25°C) 1.33
Yield Point (Pa) 250 – 650
Casson Viscosity (Pa·s) 15 – 55
Flash Point See SDS
Curing Performance
  • Recommended cure: 90-120 sec at 150°C
  • Isothermal DSC Conversion: 95-100% at 125°C (5 min)
Cured Properties (30 min @ 150°C)
Property Value
Coefficient of Thermal Expansion (K⁻¹) 86 × 10⁻⁶
Thermal Conductivity (W/m·K) 0.2
Specific Heat (kJ/kg·K) 0.3
Density (g/cm³) 1.3
Glass Transition Temperature (°C) 140
Electrical Properties
Property Value
Dielectric Constant (1 kHz) 2.8
Dielectric Breakdown Strength (kV/mm) 33.5
Volume Resistivity (Ω·cm) 4.6 × 10¹⁵
Surface Resistivity (Ω) 28 × 10¹⁵
Adhesive Properties
Test Value
Lap Shear Strength (Steel, 150°C, 30 min) ≥ 15 N/mm² (≥ 2175 psi)
Pull-off Strength (C-1206, 125°C, 5 min) 46 N (10.3 lb)
Torque Strength (C-1206, 150°C, 3 min) 54 N·mm (7.6 in.oz)
Push-off Strength (C-1206, 150°C, 3 min) ≥ 30 N (≥ 6.7 lb)
Environmental Resistance (Lap Shear Strength @ 150°C, 30 min)
Condition % Strength Retention
Air (22°C) 100%
98% RH (40°C) 80-90%
Resistance to Hot Solder Dip (150°C, 90 sec)
  • Pass: 60 sec at 260°C solder bath + 10 sec dip

4. Storage & Handling

  • Store in sealed container at 2°C to 8°C
  • Do not return used material to the original container
  • Allow to reach room temperature before use (2-4 hours)
  • Optimal printing conditions: 25°C, RH < 70%

BERGQUIST microTIM mTIM 1028 Thermal Interface Coating High performance thermal management solution for nickel finished heat sinks, optical transceivers, and data center liquid cooling systems

BERGQUIST microTIM mTIM 1028 is purpose built for riding cage assemblies in servers, switches, and routers, interfacing with electroless nickel plated copper or aluminum heat sinks. It ensures stable operation in high power transceiver modules while also extending applicability to liquid cooling components, heat pipes, and fin based dissipative structures.

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