Applications

LOCTITE® 577™ – Adhesive – Threadsealing

Item Name: LOCTITE® 577™
Manufacturer: Henkel
Technologies: Acrylic
Color: Yellow paste
Cure Type: Anaerobic with secondary cure (Activator)
Package Size: Contact to Techniq VN for details.
Shelf Life: Contact to Techniq VN for details.

1. Product Overview

LOCTITE® 577™ is a high-viscosity, thixotropic, anaerobic thread sealant designed for locking and sealing metal threaded pipes and fittings. It is effective on active metals (e.g., brass, copper) and passive substrates (e.g., stainless steel, plated surfaces) without requiring surface activation. The product provides excellent resistance to shock, vibration, and minor surface contamination from oils.

2. Applications

  • Thread sealing for metal fittings and pipes
  • Suitable for stainless steel without surface activation
  • Withstands high temperatures and minor contamination
  • Used in industrial gas, water, and fuel applications
  • Certified for hydrogen applications (GASTEC QA Approval)
  • Meets NSF P1, EN 751-1, and AGA (Australian Gas Association) standards

3. Typical Properties

Property Value
Uncured Properties
Chemical Type Dimethacrylate ester
Appearance Yellow paste
Specific Gravity @ 25°C 1.1
Viscosity @ 25°C (mPa·s) 100,000 (2.5 rpm), 24,500 (20 rpm)
Fluorescence Positive under UV light
Cured Properties
Specific Heat (kJ/kg·K) 2.0
Tensile Strength (ISO 37) 1.3 MPa (190 psi)
Tensile Modulus (ISO 37) 168 MPa (24,350 psi)
Performance on Threaded Fasteners (ISO 10964)
Breakaway Torque (M10 Steel) 33 N·m (295 lb·in)
Prevail Torque (M10 Steel) 2.5 N·m (22 lb·in)
Compressive Shear Strength (Steel Pins & Collars) 5 N/mm² (725 psi)

4. Environmental & Chemical Resistance

  • Withstands temperatures from -75°C to 135°C
  • Resistant to motor oil, unleaded petrol, ethanol, brake fluid, and DEF (AdBlue®)
  • Retains strength after prolonged exposure to chemicals and solvents

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