J-B Weld Blue Threadlocker provide a reliable and superior lock and seal for threaded fasteners. Ideal on all mechanical parts, body assemblies, and hundreds of other applications to prevent loosening of fasteners such as nuts and bolts from shock and vibration. J-B Weld Perma-lock Medium Strength Blue Threadlocker is ideal for fastener applications that may require easy disassembly with hand tools in the future. Temperature resistant to 150� Celsius. No spill, drop or clog cap. Tube � 6 ml.