Adhesives
Loctite
- https://en.wikipedia.org/wiki/Loctite
- Brand name like Kleenex, that produces adhesives
- Mainly preventing bolts from loosening from vibration
Color code by strength
- Purple (222) - Low strength (screws < 1/4in), weak
- Blue (243, 242) - Mid, removable w/ hands
- Red (271, 262) - High, may require heat to remove
- Green (290) - Wicking Grade - applied after assembly, for small gaps
Most Loctite threadlockers are anaerobic adhesives, which means they cure (harden) in the absence of air and the presence of metal ions — ideal for threaded metal fasteners.