Loctite is so seldom actually required that I've got a small tube that has lasted me for almost 20 years. Greased threads to combat corrosion and the proper torque is the proper option for 99.99% of threaded joints on a bicycle. And actually I don't even use thread locker on the .01% where it might be useful. Oddly enough I have yet to have those parts come loose and fly off the bike.