blue gel loctite is good won't run all over the place my favorite. then the red evil devil loctite stud and bearing loc takes heat to get it loose again is the next best/ permanent my 2-cents.
in a pinch any sciclone rtv will work as a thread locker I use it on the oil pan nuts on my real airplane and have never had to stop on a cloud to check the oil yet.
been doing it for 23 years no nuts have fallen off.
But I can say I've scared mine pretty bad a couple of times.