Originally Posted by bevman
What should be used to keep the door from slamming against the side, bending the hinges, and denting the wall?
There is nothing available that will prevent the door from slamming against the side of the trailer, which usually results in a bent door, except you.
Don't let the door fly out of your firm grip, and you will never have the problem.
The door slamming against the side of the trailer, "WILL" damage the side wall. There is nothing to stop it.