Permabond HM118 High-Strength Threadlocker

Description

Permabond® HM118 is a high-strength anaerobic threadlocker designed for locking bolts, nuts, and screws that require permanent assembly. This thixotropic, non-drip adhesive provides superior vibration resistance, corrosion protection, and high torque strength, making it ideal for machinery, automotive, and industrial applications.

HM118 cures quickly and reliably on steel, cadmium, zinc, and other plated fasteners, forming a durable, permanent bond that withstands extreme conditions. It meets MIL-SPEC MIL-S-46163A (Group 03, Class 3, Grade 1) and ASTM D5363 AN 0331, ensuring compliance for military and aerospace applications.

For customers seeking alternatives to Loctite® 271, 3M™ Scotch-Weld™ TL71, or Permatex® Red Threadlocker, Permabond HM118 delivers an equivalent, high-performance solution.

Key Features & Benefits

✅ High-Strength, Permanent Locking – Prevents loosening due to vibration and shock
✅ MIL-SPEC Compliant – Meets MIL-S-46163A (Group 03, Class 3, Grade 1) and ASTM D5363 AN 0331
✅ Fast Curing at Room Temperature – Handling strength in 10 minutes, full cure in 24 hours
✅ Non-Drip, Thixotropic Formula – Stays in place during application
✅ Corrosion & Chemical Resistance – Protects fasteners from rust, moisture, and harsh chemicals
✅ Withstands High Temperatures – Reliable in extreme environments up to 150°C (300°F)
✅ 100% Solids, Solvent-Free – Environmentally friendly and safe for industrial use

Technical Specifications

• Viscosity: 1,800 mPa.s (thixotropic)
• Gap Fill: 0.2 mm (0.008 in)
• Maximum Thread Size: M20 (¾”)
• Handling Strength: ~10 minutes at 23°C (73°F)
• Full Cure Time: 24 hours
• Torque Strength (M10 Steel, ISO 10964):
  • Break: 23 N·m (200 in.lb)
  • Prevail: 32 N·m (280 in.lb)
• Shear Strength (Steel Collar & Pin, ISO 10123): 17 MPa (2500 psi)
• Temperature Range: -55°C to 150°C (-65°F to 300°F)
• Color: Red

Applications

• Permanent locking of bolts, studs, and screws
• Industrial machinery and heavy equipment
• Automotive and aerospace fasteners
• Pumps, motors, and rotating assemblies
• Oil & gas, mining, and military applications

Directions for Use

1. Ensure surfaces are clean, dry, and grease-free. Use acetone or isopropanol for best results.
2. Apply HM118 to the threads of one component.
3. For through holes, apply a continuous bead along the contact length of the threads.
4. For blind holes, apply several drops to the bottom of the hole.
5. Assemble and torque fasteners as required.
6. Allow 10 minutes for handling strength and 24 hours for full cure.
7. For faster curing, use Permabond A905 or ASC10 Activator.

🔹 Note: HM118 is a high-strength, permanent threadlocker—removal may require localized heating and mechanical force. Not recommended for plastic components or oxygen-rich systems.