• Prevents fastener loosening on vibrating assemblies, e.g. pumps, gear boxes or presses
• Works on all metals, including passive substrates
• Suitable for use on most oil-coated, 'as-received' fasteners without cleaning
• Can be disassembled with ordinary hand tools for easy service and maintenance
• NSF/ANSI 61 certified

Blue, medium strength, primerless threadlocker
This iconic threadlocker locks and seals metal nuts and bolts to prevent loosening due to shock and vibration. Medium strength: removable with hand tools.

The LOCTITE® 243 is a blue, general purpose threadlocker that provides a medium-strength bond. It works on all metals without primer, including passive substrates such as stainless steel, aluminum, and plated surfaces. Suitable for use on most oil-coated, 'as-received' fasteners without cleaning.