Video courtesy of EPDM Coatings. This video from one of their customer shows you the proper application of Liquid Roof on an RV Roof. This is a liquid EPDM rubber. It is a one coat application and does not need a primer. Full 5 year warranty. Call 610-298-1989 to order or visits www.epdmcoatings.com. When ordering on line enter promo code "SUNNY" and get $5.