Loctite 577 Thread Sealant, a medium-strength, general-purpose anaerobic adhesive designed for locking and sealing metal pipes and fittings.Key Specifications & FeaturesProduct Type: General-purpose thread and pipe sealantStrength & Viscosity: Medium strength, high-viscosity yellow liquidApplication: Provides an instant, low-pressure seal for coarse and fine metal threaded assemblies; will not creep, shrink, or shred.