LOCTITE 577 THREAD SEALANT 50ML

Seal and lock metal threads with confidence using Loctite® 577, the trusted medium-strength, general-purpose thread sealant engineered for metal pipes, fittings, and threaded assemblies. Designed to provide an instant, low-pressure seal, Loctite 577 prevents leakage, loosening, and corrosion caused by vibration, heat, or mechanical stress — ensuring reliable performance in demanding industrial environments.

Formulated as a non-shrinking, non-creeping anaerobic paste, Loctite 577 cures in the absence of air between close-fitting metal surfaces to form a durable, chemical-resistant seal. It offers excellent thermal and chemical resistance, cures on both active and inactive metals, and features a medium viscosity (25,000 mPa·s) for smooth, precise application with minimal migration.

Ideal for maintenance, plumbing, and mechanical assembly, Loctite 577 is suitable for sealing all coarse metal threads — from stainless steel to brass — and is certified for industrial and food-grade applications with NSF P1 (No. 123001) and DVGW (EN 751-1) approvals.

Key Features:

• Medium-strength thread sealant for locking and sealing metal threads

• Instant low-pressure seal – prevents leaks immediately after assembly

• Non-shrinking, non-creeping formula ensures reliable long-term sealing

• Excellent chemical and temperature resistance

• Cures on all metals, including stainless steel and passive substrates

• Prevents vibration-induced loosening

• NSF P1 Reg. No.: 123001 – food-safe certification

• DVGW Approval (EN 751-1): NG-5146CQ0312

• Colour: Yellow

• Temperature resistant: –55°C to +180°C

Specifications:

• Brand: Loctite®

• Model: 577

• Type: Thread Sealant (Anaerobic Paste)

• Colour: Yellow

• Size: 50 mL

• Viscosity: 25,000 mPa·s

• Strength: Medium

• Cure Type: Anaerobic

• Base: Paste

• Temperature Range: –55°C to +180°C

Reliable, versatile, and easy to apply — Loctite® 577 provides a professional-grade seal for metal pipe threads in industrial, mechanical, and plumbing applications.