LOCTITE HY 4090 Universal Structural Bonder


LOCTITE HY 4090 is an off-white to light yellow, high viscosity, 2-part hybrid, universal structural bonder with high humidity and vibration resistance.
LOCTITE® HY 4090 is a high viscosity, off-white to light yellow gel. It opens completely new application areas in structural bonding – for the very first time combining instant adhesive properties with those for epoxies to give more striking benefits. Fixture time of 90 - 180 seconds and suitable for gaps up to 5 mm. Resistant to vibration, shock loads and impacts with the ability to bond dissimilar substrates. Best application results are achieved with LOCTITE® 50 ml Adhesive Mixing Nozzle (item 1826921), LOCTITE® 400 ml Adhesive Mixing Nozzle (item 1573135), LOCTITE® 96001 (item 267452) or LOCTITE® 983439 (item 218311).
  • High moisture resistance
  • Vibration, shock loads and impact resistance
  • Temperature resistance up to 150 °C
  • Gap filling up to 5mm
  • UV resistant allowing outdoor applications


% Elongation @ Break 3.6
Application Method Dispense Gun
Applications Bonding Plastic, Bonding Rubber, Construction, Direct Bonding, Edge Bonding, Exterior Repairs, Interior Repairs, Structural Bonding
Color White: Off White, Yellow: Light Yellow
Cure Type Room Temperature (Ambient) Cure, Two Component Mix
Fixture Time 180 sec.
Fixture Time Temperature 180 °C
Full Cure Time 168 hr.
Gap Fill 5 mm
Key Characteristics Viscosity: High Viscosity
Mix Ratio 1:1 (by weight)
Number of Components 2 Part
Physical Form Gel
Shear Strength Unit, Aluminum psi
Shear Strength Unit, Etched Aluminum psi
Shear Strength Unit, Grit Blasted Steel N/mm²
Shear Strength, Aluminum 1100
Shear Strength, Etched Aluminum 1900
Shear Strength, Grit Blasted Steel 2420
Substrates Composite, Composite: Advanced Composites, Dry Surface, Elastomer: Highly Filled Elastomer, Epoxy, Fiberboard, Gel Coat, Laminate, Metal, Non-Gel Coat, Painted Surface, Phenolic, Plastic, Rubber, Thermoplastic, Thermoset, Urethane: Cast Urethane, Vinyl, Wood