Prevents streaks and stains and provides leak protection on Travel Trailers, Fifth Wheels, RV's etc. It reduces the use of streak cleaners which can damage your RV Camper finish. Available in several lengths. RainKap (RainCap) is NOT used at the awning unless its mounting is below the roofline molding like some Fifth Wheels. Easy to roll in with the concave wheel of a screen spline tool and cut to length. Routes dirty rooftop water away from the siding, window mounts, storage compartment doors and slide seals preventing saturation, leaks and black streaks. Seals the roof edge molding screws for additional leak protection at the roofline. Protects and saves your investment, time and money. See our web site for more information www.RainKap.com.