Permabond HL126 Penetrating Threadlocker

Description

Permabond® HL126 is a penetrating-grade, low-viscosity anaerobic threadlocker designed to lock and seal pre-assembled fasteners through capillary action. Its thin, wicking formula makes it ideal for applications where disassembly is not possible. HL126 penetrates into tight spaces, preventing vibration loosening and sealing micro-gaps.

Beyond threadlocking, HL126 is excellent for sealing weld porosities, offering a quick and effective way to prevent leaks in metal assemblies. It cures fast on most metallic surfaces, making it a versatile solution for industrial, automotive, and aerospace applications.

For customers seeking alternatives to Loctite® 290, 3M™ Scotch-Weld™ TL90, or Permatex® Penetrating Grade Threadlocker Green, Permabond HL126 offers a high-performance, MIL-SPEC compliant solution with superior environmental resistance.

Key Features & Benefits

✅ Penetrates Pre-Assembled Fasteners – Wicks into threads via capillary action
✅ Prevents Vibration Loosening – Strengthens fasteners without requiring disassembly
✅ MIL-SPEC Compliant – Meets MIL-S-22473E Grade AA (Group 01, Class 1, Grade 1) and MIL-S-46163A Type III Grade R (Group 02, Class 6, Grade 1)
✅ Seals Weld Porosities – Fills micro-gaps and pinholes in metal welds
✅ Thin, Water-Like Consistency – Ideal for fine threads and small gaps (0.05 mm)
✅ Fast Cure Time – Handling strength in 15 minutes, full cure in 24 hours
✅ 100% Solids, Solvent-Free – Environmentally friendly and non-shrinking

Technical Specifications

• Viscosity: 10 – 30 mPa.s (very low, wicking)
• Gap Fill: 0.05 mm (0.001 in)
• Maximum Thread Size: M10 (½”)
• Handling Strength: ~15 minutes at 23°C (73°F)
• Full Cure Time: 24 hours
• Torque Strength (M10 Steel, ISO 10964):
  • Break: 14 N·m (125 in.lb)
  • Prevail: 34 N·m (300 in.lb)
• Shear Strength (Steel Collar & Pin, ISO 10123): 10-20 MPa (1450-2900 psi)
• Temperature Range: -55°C to 150°C (-65°F to 300°F)
• Color: Green

Applications

• Locking and sealing pre-assembled fasteners
• Weld porosity sealing and metal repair
• Fine-threaded fasteners in automotive and aerospace applications
• Preventing leaks in hydraulic fittings and pipe threads
• Tamper-proofing set screws and small fasteners

Directions for Use

For Threadlocking Post-Assembly:

1. Assemble and torque fasteners as required.
2. Apply HL126 over the fastener, allowing it to wick into the joint.
3. Product will penetrate and cure in place, securing the assembly.

For Weld Sealing:

1. Clean the weld area of dirt, rust, scale, and debris.
2. Apply HL126 directly over the weld to allow penetration into micro-porosities.
3. Allow product to cure for at least 1 hour before pressurization.

🔹 Note: Not recommended for oxygen-rich systems or plastic components.