Features : GREAT FOR • Rocker Arms • Stud Bolts • Frame Bolts • Fasteners and Bushings • Loose Screws • Vibration Sensitive Items. USE ON • Automotive • Threadlockers • And More >>J-B Weld Threadlockers 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 from shock and vibration. J-B Weld Perma-lock High Strength Threadlocker is ideal for heavy-duty applications requiring resistance to severe shock and vibrations. Heating and hand tools are required to separate parts