On my old ('78) airhead, Loctite 290 (green) and Vibra-tite VC3 are the two thread lockers used most. I always wondered if Loctite makes a product similar to Vibra-tite VC3? My admiration for the product comes from reusing the same fastener without having to reapply, which seems to happen often on this old bike.
I recently used the green to help with a leaking cylinder head push-rod tube oil seeping problem. Good stuff. The stick loctite (blue) sounds like something I must have - just because.