Applications

LOCTITE® HY 4090™ – Structural Adhesive – Bonding various substrates including metals, plastics, and composites.

  • Item No: LOCTITE® HY 4090™
  • Manufacturer: Henkel
  • Technologies: Cyanoacrylate/Epoxy Hybrid
  • Color: Off-white to light yellow gel
  • Cure Type: Room temperature cure after mixing
  • Package Size: Contact Techniq VN for details
  • Shelf Life: Contact Techniq VN for details

1. Product Overview

  • Technology: Cyanoacrylate / Epoxy Hybrid
  • Type: Two-component adhesive (1:1 mix ratio)
  • Appearance:
    • Part A: Transparent to straw-colored liquid
    • Part B: Off-white to light yellow gel
    • Mixed: Off-white to light yellow gel
  • Cure: Room temperature after mixing
  • Viscosity: High
  • Application: Bonding metals, plastics, rubbers

2. Applications

  • Bonds metals, most plastics, and rubbers
  • Good gap-filling properties for rough/poorly fitting surfaces
  • Resistant to moisture and high temperatures
  • Suitable for high-temperature/humidity environments

3. Typical Properties

Uncured Properties
Property Part A Part B
Specific Gravity (g/cm³) 1.01 1.06
Viscosity (mPa·s @ 25°C) 4,000 – 7,000 25,000 – 40,000
Cured Properties (After 1 week @ 22°C)
Property Value
Glass Transition Temperature (°C) 88
Shore Hardness (D Scale) 65 – 69
Tensile Strength (N/mm²) 7.1 (1,025 psi)
Tensile Modulus (N/mm²) 565 (81,800 psi)
Elongation at Break (%) 3.6
Adhesive Performance (Lap Shear Strength after 168h @ 22°C)
Substrate Strength (N/mm²) Strength (psi)
Steel (grit blasted) 17 2,420
Stainless Steel 15 2,120
Aluminum 7.6 1,100
Etched Aluminum 13 1,900
Zinc Dichromate 9.1 1,320
ABS 5.2 750
Phenolic 3.2 460
Polycarbonate 6.9 1,000
Nitrile 0.7 100
Oak Wood 4.8 700
Epoxy 9.1 1,320
Polyethylene 0.5 72
Polypropylene 0.6 87

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