Applications

LOCTITE® 290™ – Threadlocker – Locking and sealing of threaded fasteners

  • Item Name: LOCTITE® 290™
  • Manufacturer: Henkel
  • Technologies: Acrylic, Dimethacrylate ester
  • Color: Green
  • Cure Type: Anaerobic, Secondary cure with activator
  • Package Size: Contact to Techniq VN for details.
  • Shelf Life: Contact to Techniq VN for details.

1. Product Overview

LOCTITE® 290™ is a low-viscosity, anaerobic threadlocker designed for locking and sealing threaded fasteners. Its capillary action allows it to wick between engaged threads without disassembly. It prevents loosening and leakage due to shock and vibration and can also be used to seal porosity in welds, castings, and powdered metal parts.

Key Features:

  • Technology: Acrylic (Dimethacrylate ester)
  • Appearance: Green liquid
  • Fluorescence: Positive under UV light
  • Cure Mechanism: Anaerobic (secondary cure with activator)
  • Application: Threadlocking
  • Strength: Medium to High
  • Viscosity: Low

2. Applications

  • Locking and sealing pre-assembled threaded fasteners
  • Preventing loosening due to vibration and shock
  • Sealing porosity in metal parts like welds and castings
  • Suitable for various metals including steel, brass, and zinc-coated materials

3. Typical Properties

Uncured Properties

Property Value
Specific Gravity (@ 25°C) 1.08
Viscosity (Brookfield RVT) 20 – 55 mPa·s (cP)

Cured Properties

Property Value
Coefficient of Thermal Expansion 80 × 10⁻⁶ K⁻¹
Thermal Conductivity 0.1 W/(m·K)
Specific Heat 0.3 kJ/(kg·K)

Performance After 24 Hours @ 22°C

Property Value
Breakaway Torque (M10 Steel) 10 N·m (90 lb·in)
Prevail Torque (M10 Steel) 29 N·m (260 lb·in)
Breakloose Torque (M10 Steel) 30 N·m (270 lb·in)
Compressive Shear Strength (Steel) ≥5.4 N/mm² (≥780 psi)

Environmental Resistance

Chemical/Solvent (Tested @ 23°C) % Strength Retention (after 1000 h)
Motor Oil (125°C) 50%
Leaded Petrol (22°C) 90%
Brake Fluid (22°C) 85%
Water/Glycol (50/50 @ 87°C) 90%
Acetone (22°C) 85%
Ethanol (22°C) 80%
DEF (AdBlue® @ 22°C) 135%

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