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Loctite 577 Medium Strength Threadlocker, 250mL Tube, Dark Yellow

ID: LOC21457 Mfr ID: 21457
Manufactured by: Loctite Industrial
Loctite 577 is designed for the locking and sealing of metal threaded pipes and fittings. Particularly suitable for use on stainless steel without the need for surface activation. The product cures when confined in the absence of air between close fitting metal surfaces and prevents loosening and leakage from shock and vibration.

Container Size
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  • Brand name :  Loctite
  • Series :  LOC-577
  • Item Name :  Threadlocker
  • Short Desc :  21457 577 THREAD SEALANT 250ML TUBE
  • UPC :  00079340214576
  • UNSPSC :  31201701

Loctite 577 provides robust curing performance. It not only works on active metals (e.g. brass, copper) but also on passive substrates such as stainless steel and plated surfaces. The thixotropic nature of Loctite 577 reduces the migration of liquid product after application to the substrate.

Performance Details
Full Cure Time 24 hr 
Application Time 30 min - 6 hr (Unprimed), 1 - 3 hr (Primed) 
Shear Strength 725 psi 
Tensile Strength 100 psi 
Design & Construction
Form Paste 
Color Dark Yellow 
Cure Type Anaerobic Cure 
Environmental Condition
Temperature Rating -55 to 150 deg C 
Supporting Information
Applicable Materials Steel, Stainless Steel, Galvanized Steel, Aluminum 
Chemical Properties
Composition Dimethacrylate Ester 
Specific Gravity 1.15 
VOC 0.99g/L 
Viscosity 70000 - 130000 cP 
Physical Properties
Container Size 250mL 
Container Type Tube 
Odor/Scent Mild 

Loctite 577 Medium Strength Threadlocker, 250mL Tube, Dark Yellow Material Safety Data Sheet (MSDS) 

Loctite 577 Medium Strength Threadlocker, 250mL Tube, Dark Yellow Safety Data Sheet (SDS) 

Features :

  • General purpose, medium strength liquid thread sealant for sealing metal threads
  • Suitable for all metal types
  • Instant low pressure seal
  • Locks connection against vibration-induced loosening and other stresses
  • Easy-to-apply
  • Cures on active and inactive metals
  • Acrylic chemical compound
  • One-component requires no mixing and is heat cure
  • Activator secondary cure
  • Slight solubility in water
  • Specific gravity of 1.15 - 1.2

Applications :

  • For Lock and Seal Metal Pipes and Fittings