extremely simple to place (adhesive) Disadvantage: the limited length which does not allow to caulk one piece full height of the door. Does not stand a cat locked up by mistake in the garage, and determined to open the door at all costs! Nevertheless, it is easy to change damaged parts: pulling off sharply, remove the glue with white spirit ... I have two feed rollers for next winter, entrance doors, garage and cellar are equipped on their periphery ALL.