I first became acquainted with EternaBond tape after I discovered that the side seams on the fiberglass roof of my new 1999 Winnebago roof would need constant checking and re-caulking to avoid the roof from popping out of the "J" channel. Unchecked, many RVers experienced major roof problems as large chunks of their roofs were caught by the wind and ripped off. I was determined to find a permanent solution for this major problem. After reading the manufacturers claims, I applied EternaBond tape to both roof side seams as well as the front and rear roof caps. The tape was applied right over the old caulked seams. Almost eight years later the tape is still in place and doing the job. I haven't had any leaks or other roof issues and haven't caulked anything topside. It truly is a miracle product. Thanks EternaBond.