My greenhouse door has a cabin hook, with the bit it hooks into stuck onto the side of concrete block shed wall. Well, it was mounted on a concrete shed, it came off in the wind about two years after I mounted it there with some adhesive I don't remember.
I've tried two part araldite (fell off) and Ados F2. Neither stuck the metal to the concrete wall well.
Do I need a different adhesive? Could be that I just need to hold one of those ones longer until it sets?