Magmabond anaerobic nutlock magmabond mag42 50ml magmabond anaerobic nutlock 50ml is a general purpose medium strength thixotropic nutlock designed for use where threaded and push fit parts must remain secure in normal use but can be disassembled with hand tools when servicing is requiredmagmabond anaerobic nutlock is a blue liquid that cures when confined in the absence of air eg on close fitting metal surfaces and is suitable for all metric and imperial nuts and bolts preventing vib