[idkfa]

With modern tanks (those designed with the vents), I cannot see why loctite would be used at all. You can either:

- Not loctite the threads, the tank may unscrew, you could vent the tank.
- Loctite the threads, you may or may not clog the vent, you may or may not create a rocket.

It seems even IF the tank can unscrew when you properly torque it using no loctite, the end consequences are much worse if you actually do use loctite. Not speaking of older tanks though...