I have a 40ft Itasca Ellipse and luckily it's under the gazebo because it took me days to put the old stuff away as I was doing about 20ft a day. After the old one came out, it was easy to put it back in. Took 3 tubes and that's what winnebago uses so he stuck with OEM. The old man was 15 years old and still in good condition, but showing his age. It never hurts to keep up with roof maintenance.