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. Loctite® 577™ Thread Sealant, Fluorescence High Viscosity Instant Low Pressure Seal, Tube, 250 mL, Composition: Tetramethylene dimethacrylate, Oleic acid 5.5EO, Methacrylic acid, monoester with 1,2-propanediol, polymer with 4,4'-methylenediphenyl diisocyanate, Polyglycol dimethacrylate, Ethene, homopolymer, Ethene, Yellow, Mild, -65 to 355 °F, 1.17 Specific Gravity, 199.4 °F Flash, 3% VOC