Originally Posted by
Severian
And don't use green for threaded parts. It's primarily designed for PRESSfit (bearing sleeves, headset cups etc) parts.
There is a green threadlocker (as opposed to the green 609/690 that you refer to) that is intended to wick into preassembled fasteners. I don't think it's super strong.
I agree with the others though, you don't need threadlocker on brake mounts, it's over kill. Just tighten it properly and it won't come loose.