What I found with mine was that water got into the track under the rubber and flowed to the front. The rubber just held the water in the track. The MH was parked on a slight incline. Over the years the screws rusted almost completely through. Some were half the original dia some rusted completely through. I found the same thing in the molding above my baggage doors. My MH was 15 years old at the time. I put caulking on the threads or the new screws and most threaded tight. I ended up caulking the bead so water could not enter.