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Loctite 242 is a medium-strength, blue anaerobic threadlocker designed to lock and seal metal fasteners (1/4 to 3/4 inch) against vibration, leaks, and corrosion. It cures in 24 hours on metal surfaces without air, allowing for removal with hand tools. It is ideal for small motors, machinery, and automotive applications, functioning between -65 and +300 F.