Our RV Roof Magic is a one-coat application coating so as the product dries it chemically cross-links, creating a chemical bond whereby our coating and your roof fuse together to literally become one and the same., it'll extend your RV's roof for another 18 years. Protect your investment from leaks and damages with our RV Roof Magic, no primer is needed, waterproofs within 3 hours, and provides a beautiful finish to your camper. To order you can call us directly at 610-298-1989 ext. 1 for sales.