This is not glue, not threadlocker. It’s a retaining compound for metal parts.
Bearings - Lock bearings into housings or onto shafts that are a bit loose
Bushings & sleeves - Stop them from spinning or walking out
Cylindrical parts - Gears, pulleys, rotors that fit with clearance
Repair worn parts - If a shaft/housing is worn and has too much play
It cures when there’s no air between metal surfaces. Once it sets, it’s basically welded but you can still remove it with heat later.