Used 7 gallons on my 36' MH. GREAT results! Easy to apply; watch the various youtube videos and you'll be fine. I didn't bother with the squeegee; after making a big mess. I just used paint roller on a long handle after cutting in all openings/edges with a paint brush. Some air bubbles but no big deal. Had some pieces of the rubber substrate poke through and it leaked a bit on our first trip. Just went up there with some lap sealant and sealed it up. Had a few spots where I spread too thin that peeled up. A good dallop of lap sealant took care of those as well. After a week or so of curing and a few driving miles, go back up there and check for potential leak spots. Once it fully cures, I am planning to purchase/apply bedliner paint over the front and back seam to just below the running lights on top; just in case. Im very happy with the results. Pix coming soon.