General Purpose Thread Sealant
Product category: Thread sealants
- Technical specifications
LOCTITE® 577 is designed for the locking and sealing of metal pipes and fittings as well as other threaded assemblies. The product provides an instant, low-pressure seal for metal pipes and fittings. It will not creep, shrink or shred. It has excellent chemical and thermal resistance and offers less migration of liquid product after application.
Excellent chemical resistance
Instant low pressure seal
Suitable for all metals
Medium-strength, general purpose thread sealant for sealing metal threads
Locks connection against vibration-induced loosening and other stresses
Easy to apply
Cures on active and inactive metals
NSF P1 Reg. No. 123001
DVGW Approval (EN 751-1): DVGW Reg. No. NG-5146CQ0312
Agency approvals / certificates / specifications:
Pipe Sealing,Thread Sealing
Breakaway torque, Steel, M10:
33.0 N·m (295.0 in./lb.)
Chemical Resistant,Fluorescent,General Purpose,Immediate Low Pressure Sealing,Strength: Medium Strength,Surface Contamination-Tolerant,Temperature: High Temperature,Thixotropic
-55.0 °C - 150.0 °C (-65.0 °F - 300.0 °F)
Recommended for use with:
Metal,Metal: Passive Metal,Thread Type: Tapered
Viscosity, 20 RPM:
How to use
Cleaning - It is recommended to use LOCTITE® SF 7070™ Cleaner & Degreaser to degrease and clean surfaces prior to applying adhesive.
Activation - If cure speed is too slow due to passive metals (stainless steel, aluminum and plated metals) or low temperatures (below 5°C), use LOCTITE® SF 7649™ activator. Allow to dry.
Apply a 360° bead to the leading male thread, leaving the first thread free. For bigger threads, apply both on male and female threads.
Assemble fittings using wrench tightening in accordance with manufacturers' recommendations.
Disassemble with standard hand tools. If not possible, apply localized heat to approximately 500°F/260°C; disassemble parts while hot. For corroded or seized parts use LOCTITE® LB 8040™ Freeze and Release.
The standard continuous operating temperature range for LOCTITE® anaerobic adhesives is -65° to +300°F (-55°C to +150°C). Depending on the specific application requirements, high-performance grades are also available offering increased temperature resistance. Please consult with the Henkel technical team for availability and grade selection.
Yes, Henkel anaerobic adhesives become highly resistant thermoset polymers once cured, making them suitable for a vast number of applications. Many Henkel silicone adhesives offer excellent resistance to standard media like water/glycol, amongst other solutions. Consult our online product resources or contact our technical teams for further information.
All adhesives are compatible with metal substrates although bond strength and durability will vary depending on the technology selected. Anaerobic adhesives may cause stress-cracking in some sensitive polymers and therefore should generally be avoided on plastic parts. Consult Henkel technical teams for further advice as needed.
All necessary H&S measures and PPE (personal protection equipment) requirements can be found on the product material safety data sheet, all of which are available via our website.
Subscribing to our newsletter is an easy way of keeping in touch with all the latest industry developments and scientific innovations. Be part of our fast-growing community and look forward to getting all the latest, first.