I only did the seal on the hatch lid on three sides. The top and both sides. Not the lower edge. I will say that in the main, it seems to work just fine. However along the top edge I have to put the weatherstrip right up along the top edge,even in front of the 1 inch wooden strip in front of the hatch stiffener. There was about 6 inches where the foam strip sliped back a little bit away from the forward edge because I was not diligent in my lining it up, and I got a small leak. So in sum,The best results for me have been to run the foam sealing tape right up against the absolute perimeter on the left right and top sides.