LOCTITE® 577 - 250 ml Tottle

Features and Benefits

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Available sizes:

50 ml Tottle

250 ml Tottle

50 ml Accordion
TDS Download
Where to Buy
Medium strength, thixotropic, general purpose thread sealant for straight-to-straight and straight-to-taper threaded fittings. Fills the space between threaded parts and seals and locks at the same time.
When you need a general purpose thread sealant with high temperature- and contamination-tolerance, as well as effectiveness on inactive and active metals, choose LOCTITE® 577. Designed for the locking and sealing of threaded metal pipes and fittings, this product provides an instant, low-pressure seal and won't creep, shrink or shred. Perfect for use on stainless steel without the need for surface activation, it offers gap performance to 0.25 mm (0.01") and will cure even in the presence of minor surface contaminations from cutting, lubrication, anti-corrosion and protection fluids, or cleaners containing surfactants and corrosion inhibitors. Meets the performance requirements of KIWA GASTEC QA AR 214 for admixtures up to and including 100 % hydrogen gas – certifications are available in select countries.
  • 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
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Documents and Downloads

Technical Data Sheet
LOCTITE® 577™
Download TDS
Safety Data Sheets and RoHs
  • 50 ml Tottle - IDH 2068151
  • 250 ml Tottle - IDH 2068161
  • 50 ml Accordion - IDH 2068162
LOCTITE 577, 50ml 2068151 en-ES
IDH: 2068151
EAN: 5010266011950

Size Case: 50 ml Tottle

Download SDS

Download RoHs
LOCTITE 577, 250ml 2068161 en-ES
IDH: 2068161
EAN: 5010266011974

Size Case: 250 ml Tottle

Download SDS

Download RoHs
LOCTITE 577, 50ml 2068162 en-ES
IDH: 2068162
EAN: 5010266011929

Size Case: 50 ml Accordion

Download SDS

Download RoHs
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Technical Information

Agency approvals / certificates / specifications DVGW, NSF, WRAS
Application method Dispense system, Manual
Applications Pipe sealing, Thread sealing
Breakaway torque, Steel M10 33.0 N·m (295.0 in./lb. )
Color Yellow
Cure type Anaerobic cure
Key characteristics Chemical resistant, Fluorescent, General purpose, Immediate low pressure sealing, Strength: medium strength, Surface contamination-tolerant, Temperature: high temperature, Thixotropic
Operating temperature -55.0 - 150.0 °C (-65.0 - 300.0 °F )
Physical form Paste
Recommended for use with Metal, Metal: passive metal, Thread type: tapered
Viscosity, 20 RPM 25000.0 mPa·s

How to

Step by Step Guide

1. Preparation

Cleaning - It is recommended to use LOCTITE® SF 7063/7064/7070 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 temperature (below 5°C), apply activator LOCTITE® SF 7240 or LOCTITE® SF 7649 (see cure speed vs activator graph in the TDS). Allow to dry.

2. Application

Apply a 360° bead to the leading male thread, leaving the first thread free. For bigger threads, apply both on male and female threads. For manual dispensing the use of a peristaltic handgun is recommended to ensure a consistent application volume.

3. Assembly

Assemble fittings using wrench tightening in accordance with manufacturers' recommendations.

4. Disassembly

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.

Where to Buy

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LOCTITE® 577
Medium strength, thixotropic, general purpose thread sealant for straight-to-straight and straight-to-taper threaded fittings. Fills the space between threaded parts and seals and locks at the same time.
  • 50 ml Tottle - IDH 2068151
  • 250 ml Tottle - IDH 2068161
  • 50 ml Accordion - IDH 2068162

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    Frequently Asked Questions

    LOCTITE® 577 is similar to

    • LOCTITE® 567