PERMATEX Medium Strength Threadlocker BLUE Gel is a medium strength anaerobic threadlocking gel conveniently packaged in a new Gel Twist? applicator. the product, like its liquid counterpart, is a single component, anaerobic gel that cures when confined in the absence of air between close fitting metal surfaces, ideal for all 6mm to 25mm (1/4 inch to 1 inch) diameter threaded assemblies. Excellent chemical resistance and temperature resistance range of -54°C to +149°C (-65°F to +300°F). the assembly is easily removable with hand tools for servicing requirements