I had roof damage on my 1989 Dolphin resulting in leaks into the unit. As a newbie, I repaired it with silicone caulk. The problem with silicone is after exposure to sunlight, it begins to deteriorate. After internet research, I decided to give Eternabond a try. The application was completed this weekend after removal of all the silicone. Beware! Eternabond will not stick to silicone. I tried it on a small leak spot as a test. Only time will tell if my leak problem is solved. I can say this.This stuff is easy to apply and sticky (with emphasis) and once you put it down, it's down! I discussed this product with other Rv'ers this past summer and their experience with Eternabond was very positive.