Product Name
Permabond Anaerobic HL126 Threadlocker
Brief Description
Permabond HL126 is a water-thin, low-viscosity, penetrating-grade anaerobic threadlocker designed to reliably lock and seal pre-assembled fasteners through capillary action. It also effectively seals weld porosities and prevents vibration loosening in various metal assemblies.
Popular Applications & Uses
- Locking and sealing pre-assembled fasteners, nuts, and bolts.- Preventing vibration loosening in mechanical assemblies.- Sealing weld porosities, micro-gaps, and pinholes in metal assemblies to prevent leaks.- Securing set screws permanently after adjustment.- Replacing lock washers and plastic inserts.
Industries that Commonly Use It
- Aerospace/Defense- Automotive Service/Repair- Construction/ Building Services- Electrical Services or Products- Energy- General Manufacturing- Government & Military- Metal Fabrication- Transportation/ Specialty Vehicle
Special and Unique Features
- Penetrating/Wicking Grade: Designed to penetrate into pre-assembled fasteners via capillary action.- Water-thin consistency (low viscosity).- Fast curing on most metallic surfaces (handling strength in ~15 minutes).- Can be applied post-assembly.- Seals weld porosities effectively.- Prevents vibration loosening.- MIL-SPEC compliant (MIL-S-22473E Grade AA, MIL-S-46163A Type III Grade R).- 100% solids, solvent-free, and environmentally friendly.- Superior environmental resistance.
Key Properties
- Chemical Composition: Methacrylate esters.- Appearance: Green liquid.- Viscosity @ 25°C: 10 - 30 mPa.s (cP) (very low, wicking).- Maximum Gap Fill: 0.05 mm (0.001 in) to 0.12 mm (0.005 in).- Maximum Thread Size: M10 (½”).- Handling Strength: ~8-15 minutes at 23°C (73°F) on steel.- Full Cure Time: 24 hours.- Temperature Range: -55°C to 150°C (-65°F to 300°F).- Torque Strength (M10 Steel): Break: 14 N·m (125 in.lb), Prevail: 34 N·m (300 in.lb).- Shear Strength (Steel Collar & Pin): 10-20 MPa (1450-2900 psi).
Surface Compatibility
- Cures reliably and fast on most metallic surfaces.- Performs best on clean steel.- Satisfactory on most metals including anodized aluminum, stainless steel, brass, oily and "as received" finishes, and plated fasteners.- Copper and its alloys accelerate cure speed.- Oxidized or passivated surfaces (like stainless steel, zinc, aluminum) may reduce cure speed; activators (Permabond A905 or ASC10) or heat can be used to accelerate.
Known backups / known substitutes
- Loctite® 290- 3M™ Scotch-Weld™ TL90- Permatex® Penetrating Grade Threadlocker Green- Other wicking grade anaerobic threadlockers (e.g., B 290).
Comparison Note
Permabond HL126 stands out as a high-performance, MIL-SPEC compliant, penetrating-grade anaerobic threadlocker with a very low, water-thin viscosity. This allows it to wick into pre-assembled fasteners and seal weld porosities effectively, offering fast curing and superior environmental resistance, making it ideal for applications where post-assembly application and reliable sealing are critical.
