Loctite Yellow Thread Lock Sealant for Pipe Fittings and Metal Threads LOCTITE® 577

Loctite LOCTITE® 577 Thread Lock is a premium Thread Sealant and locking paste specifically formulated for sealing metal pipes and threaded assemblies in industrial applications. This yellow paste is suitable for sealing both straight and tapered threads, ensuring reliable locking and sealing performance.

The chemical composition primarily includes dimethacrylate ester, providing excellent resistance to chemicals and high temperatures up to 150°C. It delivers a medium strength lock that is particularly effective on passive metals without requiring additional activators. The high viscosity and thixotropic nature of the paste allow it to fill gaps up to 0.25 mm, preventing leaks even under high pressure.

Once fully cured, the sealant withstands pressures exceeding 200 bar, making it suitable for demanding industrial fluid power and mechanical applications. Its application versatility spans pipe fitting sealing, coarse threaded components, and general metal thread locking. The product does not creep, shrink, or shred after application, ensuring long-lasting joint integrity.

It is compliant with industry standards including ANSI/ESD S20.20:2014 and BS EN 61340-5-1:2007, reflecting its suitability for environments with electrostatic discharge considerations. Manufactured in Ireland, this Loctite product adheres to high-quality production standards.

Typical applications include use in industrial, construction, and maintenance settings where threaded metal pipe sealing and locking are necessary. It supports industrial fluid power tool operations and mechanical assembly where reliability and safety are critical.

Effective sealing and locking for straight and tapered threads. Excellent chemical and thermal resistance due to dimethacrylate ester composition. Operates within a wide temperature range from -55°C to 150°C. High-strength sealant with pressure resistance exceeding 200 bar post-curing.

High-viscosity, thixotropic formulation for gap filling up to 0.25 mm. Medium strength suitable for metal pipes and coarse threaded components. Works on passive metals without activation. ANSI/ESD and BS EN standards compliant.

Manufactured in Ireland for consistent quality. Explore a wide range of industrial sealants and adhesives at EnvMart for all your piping and mechanical sealing needs.