Loctite is a registered trade mark of one brand of thread locker. Red Loctite is called stud and bearing mount because it was designed for locking press-in rocker studs into small-block Chevy heads. A buddy used to use it to hold bronze props on his 70 mph rc hydroplanes (no nut!) and change them with a torch. Blue is a general use removable product; I have used green, very thin, designed to be applied to fasteners that were already assembled; it would wick its way into the threads and set up in the abscence of air. The original is still the best.