LOCTITE® 222 is a purple, low-strength anaerobic threadlocker for small metal fasteners up to 6.35 mm (1/4 in.) in diameter. It helps prevent loosening and leakage caused by shock and vibration while allowing routine disassembly with standard hand tools.
Best for
- Adjustment screws, countersunk screws, and set screws
- Small-diameter or long-engagement fasteners
- Low-strength metals such as aluminum and brass
- Vibrating assemblies including pumps, gearboxes, and presses
- Chassis, HVAC, fastener, and powertrain applications
Key features
- Low-strength, removable formula
- One-component; no mixing required
- Anaerobic cure on close-fitting metal surfaces
- Thixotropic liquid helps reduce migration after application
- Fluorescent for inspection
- Works with active and passive metals
- NSF P1 registration 123002 (regional approval for Europe)
Technical data
| Color | Purple |
|---|---|
| Technology | Acrylate, anaerobic cure |
| Physical form | Liquid |
| Fixture time | 20 minutes under standard conditions |
| Service temperature | -55°C to 150°C (-65°F to 300°F) |
| Viscosity | 1,200 mPa·s (cP) at 20 rpm, 25°C |
| Breakaway torque | 6 N·m (50 in-lb), M10 steel nuts/bolts |
| Prevailing torque | 4 N·m (35 in-lb), M10 steel nuts/bolts |
| Recommended substrates | Metal, including passive metals |
Available sizes
| Size | Package | Henkel IDH |
|---|---|---|
| 6 mL | Tube | 555339 |
| 10 mL | Bottle | 231125 |
| 50 mL | Bottle | 231127 |
Directions
- Clean external and internal threads with a suitable LOCTITE® cleaning solvent and allow them to dry.
- Shake thoroughly. For inactive metals or slow cure conditions, use LOCTITE® Activator SF 7471 or SF 7649 and allow it to dry.
- Apply several drops at the nut engagement area for through holes, or into the bottom of blind holes. For sealing, apply a full bead around the male threads while leaving the first thread free.
- Assemble and tighten as required.
- For removal, use standard hand tools. If excessive engagement prevents removal, heat the nut or bolt locally to approximately 250°C and disassemble while hot.
Storage
Keep the unopened container dry. Optimal storage temperature is 8°C to 21°C (46°F to 70°F); temperatures below 8°C or above 28°C may affect product properties.
California Proposition 65 warning: Cancer and reproductive harm — www.P65Warnings.ca.gov.
Refer to the current Henkel Technical Data Sheet and Safety Data Sheet before use.
Launch DateSeptember 15, 2026
Days In Market37
VendorLOCTITE
Variants3