Originally Posted by
Duragrouch
I don't like loctite. This is because, on my rear rack, long bolt (rack designed for discs, which I don't have) so more bending moment on bolt, it sheared off at the frame after 7 years. I was lucky, the threaded shaft was loose enough I could back it out with a dental tool. With loctite, that would have been impossible, even heating it up to soften the thread locker.
I'm going to geek out for a bit. Assuming the picture above is the joint that failed, there's probably a design flaw in the rack. You should be screwing the bolt all the way through the extrusion, so the bending moment is only between the end of the rack extrusion and the mounting point on the bike.
And really, claiming that 2 years' experience is enough to demonstrate that you solved a problem that took 7 years to fail really isn't very convincing.
As Tourist says, use the blue Loctite.