Permatex Blue Gel Threadlocker Not only does Threadlocker Gel from Permatex lock and seal threaded parts securely to prevent loosening from vibrations, but it also protects threads from corrosion, ensuring long-lasting performance. What's even better is that hardware is easy to remove using hand tools when needed, making disassembly a breeze. Its gel formula ensures precise application without any messy drips or waste, providing liquid-reliability for your projects.Gel Threadlocker from Permatex is a solution that saves you from loosening fasteners and the need to stock expensive lock nuts, washers, etc. Features: Gel formula provides liquid-reliability without drips, globs, mess or waste Blue medium strength formula Ideal for all nut and bolt applications 1/4 to 3/4 (6mm to 20mm) Locks and seals while preventing parts loosening due to vibration Removable with hand tools for disassembly Mil-S-46163A, Type II, Grade N