Temperature Resistant to 300°F
Ideal for ¼” to 1” fasteners
OEM Approved
No Spill, Drip, or Clog Cap
Use On
  • Automotive
  • Threadlockers
  • And More

Perma-Lock Blue Threadlocker

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 Medium Strength Threadlocker is ideal for fastener applications requiring easy disassembly with hand tools.

    Great For
    • Rocker Arms
    • Stud Bolts
    • Frame Bolts
    • Fasteners and Bushings
    • Loose Screws
    • Vibration Sensitive Items

    Made in the USA US flag

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    Clean all threads (bolt and hole) with a cleaning solvent2. Shake the product thoroughly before use.
    For thru holes, apply several drops of product onto the bolt at the nut engagement area.
    Assemble and tighten as usual. When tightening to established torque values, torque compensation is not required.