You can create a gap between the car door and the car body without damaging the door by squeezing the door with a plastic crowbar, and you can let the silencer between the door through that gap. It will easily reach the solution without bothering you and without damaging the door.
It is made of a very strong and durable special plastic, and it is a very light product. It is used in the process of tightening the door edge of the cars. Since it is made of plastic material, it does not damage the door during crimping.