Forest River used silicone on my Crusader and has the same tight bonding as from the factory after 6 years. There are many types and brands. I was told the name when I bought but can't remember. The stuff at the big box stores are probably not what you want. I have used Sikaflex and Proflex but don't like the difficulty of applying or removing. I have settled on Dicor for all future applications. As far as difficulty of removing Silicone I find Proflex and Proflex and even Dicor just as difficult. Dicor can be cut and once cleaned new can be added.