Product Name
Permabond Threadlocker and sealant Anaerobic Adhesive HH120
Brief Description
Permabond HH120 is a high-strength, high-viscosity anaerobic threadlocker and sealant designed for the permanent assembly of metal fasteners. It cures in the absence of air and in contact with metal surfaces, effectively preventing loosening due to vibration, leakage, and corrosion.
Popular Applications & Uses
- Locking bolts, nuts, and screws for permanent assembly.- Sealing pipe flanges.- Retaining worn bearings.- Securing coarse-threaded fasteners.- Preventing vibration loosening in critical components.- Used in machinery and equipment manufacturing.- Automotive engine and transmission bolt assembly.- Aerospace fastener systems.- Heavy machinery and construction equipment.- Securing screws in electronics.- Fasteners in marine equipment.
Industries that Commonly Use It
- Aerospace/Defense- Automotive Service/Repair- Construction/ Building Services- General Manufacturing- Government & Military- LED/Electronics- Marine- Metal Fabrication- Petroleum Industry, Products or Services- Pool/Spa/Plumbing- Transportation/ Specialty Vehicle
Special and Unique Features
- High strength, permanent locking.- High viscosity, non-drip, thixotropic formula, ideal for coarse threads and vertical applications.- Prevents vibration loosening and provides controlled off-torque.- Provides corrosion and environmental protection.- Full cure at room temperature.- 100% solids, solvent-free, environmentally friendly.- Meets MIL-S-46163A and MIL-S-22473E specifications.- Gap filling up to 0.25 mm (0.01 in).
Key Properties
- Chemical Composition: Methacrylate esters.- Appearance: Red liquid.- Viscosity: 7,000 mPa.s (cP) at 25°C (thick, non-drip).- Gap Fill: 0.25 mm (0.01 in).- Maximum Thread Size: M30 (1½”).- Handling Strength: Approximately 10 minutes at 23°C (73°F).- Full Cure Time: 24 hours.- Temperature Range: -55°C to 150°C (-65°F to 300°F).- Torque Strength (M10 Steel, ISO 10964): Break: 31 N·m (275 in.lb), Prevail: 34 N·m (300 in.lb).- Shear Strength (Steel Collar & Pin, ISO 10123): 17 MPa (2500 psi).- Chemical Resistance: Excellent against jet fuel, ethylene glycol, hydrocarbons, toluene, motor oil, and water.
Surface Compatibility
- Steel (best performance).- Cadmium.- Zinc.- Other plated fasteners.- Anodized aluminum.- Stainless steel.- Brass.- Oily and “as received” finishes.- Iron.- Magnesium.- Nickel.- Titanium.- Ceramics.- Glass.- Plastics (users must check compatibility).
Known backups / known substitutes
- Loctite® 277- 3M™ Scotch-Weld™ TL77- Permatex® Large Diameter Threadlocker Red- Permabond MM115 (general purpose threadlocker and sealant)- Permabond HM118 (general purpose threadlocker and sealant)- Adhesive Systems (ASI) 77TL
Comparison Note
Permabond HH120 is a high-performance, permanent anaerobic threadlocker that offers comparable performance to industry-standard alternatives like Loctite® 277, 3M™ TL77, and Permatex® Red, while meeting stringent MIL-SPEC requirements for reliability in demanding environments. It excels in preventing vibration loosening and providing corrosion protection, surpassing traditional mechanical locking methods.
