I had the same problem on my storage doors. Easily solved by cutting some 3/16" plastic tubing (outside diameter) and placing it behind the rubber gasket. This tubing pushes the gasket firmly against the door. Five minute repair. It doesn't need to be attached in any way whatsoever. I've traveled over 10,000 miles since then, through heavy rain, not one drop of water. The tubing I used was from an oxygen supply line that my in-laws used for their concentrator. I placed one continuous length from about half-way up one side, all across the top, and half-way down the other side. I also caulked the screw heads that hold the trim molding on the bottom. Don't think it was even leaking there, anyway. Hope this helps you. Mark