Liquid Roof is for RV roof, Trailers and Mobile Homes Repair. Liquid roof coatings are aftermarket products designed to extend roof life. Liquid Roof seals roof leaks, or merely provide a heat reflective or aesthetic roof coatings function over existing roof surfaces. Note for Fleetwood models or roofs that have any 3rd party coatings over them you first need to apply the ProFlex primer sold seperately.