were paying a guy to reseal our roof, just to be safe.. we did this on one camper we bought with a stuff from lowes.. ad bought a paint roller, and rolled it on.. it worked great.. we also bought a roll of the sealer tape from ebay.. $40. roll but was worth it on the roof on the other camper. but it was cracked from end to end, this camper were just doing it to be on the safe side