LOCTITE® 561 is a semi solid thread sealant in stick form. It provides an immediate low pressure seal for fine metal pipe threads up to eighty millimetres. The product ensures easy disassembly using standard hand tools while resisting shrinkage or blockages in fluid systems.
Appearance: off white semi solid stick
Specific gravity at 25 °C: 1.14
Unworked penetration: 80 to 140 (ISO 2137)
Break loose torque on NPT fittings after seventy two hours: 30 to 50 Nm
Low break loose torque on steel nuts and bolts: 7 to 10 Nm
Temperature range: –55 °C to +150 °C
Pressure rating: up to sixty nine MPa in 3/8 inch NPT fittings after seventy two hours
Primary Chemistry:
Methacrylate ester
Conor Robertson, Technical Specialist
Product recommendations backed by technical expertise.
Fast answers to formulation and application questions.
LOCTITE® 561 cures in the absence of air between close fitting metal threads, creating a clean and reliable seal. Its stick format prevents mess and enables precise application in tight locations. Certified to NSF ANSI 61 for potable water, it suits industrial, utility, and plumbing applications. Its temperature range spans from negative fifty five degrees to plus one hundred and fifty degrees Celsius.
Prevents leaks and loosening in threaded pipe applications caused by vibration or pressure changes
Eliminates reliance on tapes or pastes that may shrink or harden
Supports maintenance-friendly fittings that can be serviced without hassle
Delivers reliable sealing in areas where liquid products are unsuitable
Use LOCTITE® 561 on fine metal pipe threads up to eighty millimetres in industrial and plumbing applications
Apply directly to male threads using stick applicator
Assemble to specification and allow seventy two hours for full cure before pressurisation
Disassembly is possible with hand tools or moderate heat if necessary
For use on passive substrates or slow cure areas, consider activator assistance
Strategically located across North America and EMEA for fast, reliable delivery. Every order, every time.
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