LOCTITE® 577 is a medium-strength, thixotropic thread sealant designed for general-purpose use on straight-to-straight and straight-to-taper threaded fittings. It effectively seals and locks threaded metal pipes and fittings, providing an instant, low-pressure seal that resists creep, shrinkage, and shredding. This product is particularly suitable for applications involving stainless steel without the need for surface activation. LOCTITE® 577 offers gap-filling capabilities up to 0.25 mm (0.01 inches) and cures even in the presence of minor surface contaminants such as cutting fluids, lubricants, anti-corrosion agents, and cleaners containing surfactants and corrosion inhibitors. It is also certified for use in hydrogen gas systems, meeting the performance requirements of KIWA GASTEC QA AR 214 for admixtures up to and including 100% hydrogen gas.
- Provides an instant, low-pressure seal
- Resists creep, shrinkage, and shredding
- Suitable for stainless steel without surface activation
- Cures in the presence of minor surface contaminants
- Certified for hydrogen gas systems up to 100% admixture
- Excellent chemical resistance
- Thixotropic for ease of application
- Medium strength for ease of disassembly
- Cures on active and inactive metals
- Registered to NSF Category P1
- DVGW Approval (EN 751-1): DVGW Reg. No. NG-5146CQ0312
Technical Specifications
- Operating Temperature Range: -55°C to +150°C (-65°F to +300°F)
- Breakaway Torque (Steel M10): 33.0 N·m (295.0 in./lb.)
- Color: Yellow
- Cure Type: Anaerobic
- Viscosity (20 RPM): 25,000 mPa·s
- Physical Form: Paste
- Recommended For Use With: Metal, Metal: passive metal, Thread type: tapered
Materials
Anaerobic acrylate-based formulation
Dimensions
Available in 50 ml tottle, 250 ml bottle, and 250 ml tube sizes
Compatibility Information
- Metals: Compatible with all metals, including stainless steel, without the need for surface activation
- Thread Types: Suitable for straight-to-straight and straight-to-taper threaded fittings
- Surface Conditions: Cures in the presence of minor surface contaminants such as cutting fluids, lubricants, anti-corrosion agents, and cleaners containing surfactants and corrosion inhibitors
