Permatex® Medium Strength Threadlocker Blue is a medium strength anaerobic threadlocking material, which cures between engaged threads to form a unitized assembly that resists virtually all leakage, shock and vibration. The product is a single component, anaerobic liquid that cures when confined in the absence of air between close fitting metal surfaces. Ideal for all 1/4" to 3/4" diameter nut and bolt assemblies. Excellent chemical resistance with a temperature resistance range of -54 degree Celsius to +150 degree Celsius (-65 degree Fahrenheit to +300 degree Fahrenheit). Easily removable with hand tools for servicing requirements. OEM Specified. NSF White Book registered.