when you say "seal the roof",are you talking about coating the entire roof or just the caulked or sealed areas around all the vents,ac and stacks ?. if you mean the caulked areas ,i would reccomend using dicor caulk or better yet use eternabond over all the caulked areas. you can buy eternabond from an rv supply or get it online. expensive,but it does a great job of sealing. apply it over the caulked areas after thoroughly cleaning with mineral spirits.if you go to eternabond's website,there are videos that explain how to use it.
if you mean sealing the entire roof,why do you think it needs sealing ? if its rubber or pvc,i would just clean it .those materials don't need sealing,unless its torn or ripped.
2008 rockwood signature ultra lite 8315SS[SIGPIC]