Rv Roof Magic never needs a primer and is a single component solvent based product. With over a 15 year history of success we have helped rv owners fix roof leaks the first time. Never needing another product again. This is not your standard water based sealant. This is a solvent based system. During the drying process the product will literally chemically cross-link and bond itself to the substrate making a very barrier to the elements and water. Rv Roof Magic comes with a 5 year warranty and can be upgraded to a 10 year warranty. for more information call our office at 855-281-0907