Description
Permabond HM129 is a high-strength anaerobic threadlocker and thread sealant for metal fasteners that need permanent assembly. It cures in the absence of air between tight-fitting parts, helping maintenance and production teams stop loosening, vibration-related back-out, and fluid leakage on bolts, nuts, and screws.
Permabond HM129 Benefits
- High-strength cure is suited to assemblies that are meant to stay locked in service instead of being removed by hand.
- Oil-tolerant performance helps on real shop hardware where perfect cleaning is not always possible before assembly.
- Fast cure on steel, cadmium, zinc, and other plated fasteners keeps repair and assembly lines moving.
- Corrosion protection and leak prevention support threaded joints exposed to moisture, fluids, and vibration.
- Medium viscosity makes it practical for applying to bolts, studs, and threaded fittings without running off the parts.
This grade is a good fit when the job calls for both locking and sealing in one step. It is commonly used on industrial equipment, metal fabrication, vehicle service, and general plant maintenance where threaded joints see movement, heat, or fluid contact after assembly.
Permabond HM129 Applications
- Locking bolts and nuts on machinery that sees repeated vibration.
- Sealing threaded metal fittings that need protection against leakage.
- Permanent assembly of screws and studs on plated hardware.
- Service and maintenance work where oil may still be present on the threads.
- Production fastening on steel and zinc-coated components.
Technical Details
Permabond describes HM129 as a high-strength, medium-viscosity anaerobic threadlocker with oil tolerance, corrosion protection, and solvent-free chemistry. The technical data sheet lists 500 cP viscosity, 0.15 mm maximum gap fill, 10 minute set time on steel, 17 N/mm2 shear strength on steel, and service temperature capability to 200 degrees C. For manufacturer information, see Permabond.
Ordering Help
Use this grade when you need a permanent threadlocker rather than a removable service grade. For related retaining, sealing, and locking products, browse our anaerobic adhesives category.
If you need help matching strength level or cure speed to your hardware, call (800) 220-1966 or email [email protected].
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