Applications

LOCTITE® ECCOBOND EN UV4201 – Acrylate Encapsulant – Circuit board encapsulation and bonding in electronics industry

  • Item Name: LOCTITE® ECCOBOND EN UV4201

  • Manufacturer: Henkel

  • Technologies: Acrylate

  • Color: Red liquid

  • Cure Type: Ultraviolet (UV) / Visible light

  • Package Size: Contact to Techniq VN for details.

  • Shelf Life: 6 months

1. Product Overview

LOCTITE® ECCOBOND EN UV4201 is a red, acrylate-based, one-component adhesive formulated as an electronic encapsulant and circuit board bonding solution. It is low odor, low sensitization, and fluoresces under UV light for inspection. The material is thixotropic, offering excellent flow control and precise dispensing. Designed for UV/visible light curing, it provides quick handling strength with excellent adhesion to a wide range of plastic substrates.


2. Applications

  • Electronic encapsulant for PCBs and circuits.

  • Bonding and sealing on plastic substrates.

  • Suitable for applications requiring flow control and controlled dispense volumes.

3. Typical Properties

Condition Property Value
Still Not Mixed (Uncured) Appearance Red liquid
Viscosity @ 25°C, 2 s⁻¹ 45,600 mPa·s
Viscosity @ 25°C, 20 s⁻¹ 8,620 mPa·s
Specific gravity 1.1 g/cm³
Shelf life @ 8–28°C 180 days
Curing Performance UV cure condition 500 mW/cm² @ 365 nm, 15 s
After Mixed (Cured) Hardness Shore A 86
Elongation 122 %
Tensile strength 17 N/mm²
Tensile modulus 18 N/mm²
Lap shear strength on polycarbonate 20 N/mm²

This adhesive delivers rapid UV cure, high elongation, and reliable bonding performance, making it ideal for advanced encapsulation and bonding of electronic assemblies.

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