LOCTITE-561 (19-Gram-Stick)

Additional Product Information

Overview

Loctite 561 (19-Gram Stick) is an industrial-grade, one-component anaerobic thread sealing adhesive designed for locking and sealing pre-torqued metal pipes and fittings. Engineered to cure in the absence of air between close-fitting metal surfaces, it delivers reliable sealing performance while preventing loosening caused by vibration and shock. Its convenient stick format allows precise, clean application, especially in confined or hard-to-reach maintenance areas, making it highly suitable for MRO and AOG environments.

Key Technical Specs for Loctite 561

• Type: One-component anaerobic thread sealant (stick form)
• Appearance: Off-white, waxy consistency
• Technology: Acrylic-based methacrylate ester
• Strength: Low strength for controlled disassembly
• Cure Mechanism: Anaerobic cure between metal surfaces
• Application Method: Solid stick for clean, precise application
• Typical Use: Thread sealing for metal pipes and fittings

Approvals & Specifications

• Industrial Grade: Suitable for mechanical, plumbing, and maintenance applications
• OEM Compatibility: Widely used across industrial and engineering sectors
• Industry Classification: Thread sealing and locking compound

Typical Aircraft MRO / AOG Applications

• Sealing threaded metal pipe fittings in aircraft systems
• Use in pumps, compressors, and auxiliary systems
• Preventing loosening due to vibration in critical assemblies
• Rapid application during AOG maintenance situations

Compatibility & Safety Notes

• Compatibility: Designed for metal-to-metal threaded connections
• Surface Prep: Ensure threads are clean and free from oils or contaminants
• Safety Notes: Use appropriate PPE; avoid contact with skin and eyes
• Handling: Stick format minimizes spills and over-application

Packaging & Procurement

• Supplied as a 19-gram stick for precise application
• Compact size ideal for toolkits and on-site maintenance use

Why Loctite 561 is Chosen for AOG / MRO

• Clean and easy application in tight or difficult areas
• Reliable sealing performance under vibration and shock
• Low strength allows easy disassembly for maintenance
• Reduces mess compared to liquid or paste sealants

Practical Suggestions for Your Team (AOG Mindset)

• Keep sticks in maintenance kits for quick deployment
• Use for rapid sealing in confined or overhead applications
• Ensure proper surface cleaning before application for optimal sealing

Manufacture / Aviation Spec Codes

• Manufacturer: Loctite
• Product ID: 561
• Form: Solid stick thread sealant

Alternative Names & Descriptions

• Loctite 561 Thread Sealant Stick
• Loctite Anaerobic Pipe Sealant Stick
• Industrial Thread Sealing Adhesive (Stick Form)
• Low Strength Pipe Thread Sealant