LOCTITE® 577

Features and Benefits

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
  • 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
  • KIWA GASTEC QA AR 214 certified for hydrogen gas systems
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Documents and Downloads

Safety Data Sheets and RoHs
LOCTITE 577, 250ml 2099612 en-JP
IDH: 2099612

Size Case: 250 ml Tube

LOCTITE 577, 250ml 235280 en-JP
IDH: 235280

Size Case: 250 ml Bottle

No documents found

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