I discovered Loctite 660 a few years ago and have found it to be a pretty impressive, versatile repair option for all kinds of tubular or cylindrical fittings. It's intended for filling voids in keyway slots and gaps in shaft fittings. This stuff will hold a key in a large generator shaft with lots of torque load...so it's pretty darned strong.
Here's a video I made where I recently used it to repair door handles and window cranks, both of which had severely damaged splined shaft interfaces. It's not an adhesive, in that it's not sticky, but for things like this or fixing a pulley/shaft key or installing a bearing race it's pretty handy. There are lots of places in a bus where this can be useful. Think of it, sort of, as liquid metal. For these kinds of joints, it's far better than epoxy.