Just a heads up....
I am not sure of the problem, but if it is Silicon caulking/sealant, you need to get it off the trailer as soon as possible. It will react with the aluminum and turn the ugliest gray you have ever seen and it will stain/etch the aluminum. Only use Vulkem, Sikaflex or ParBond on the skin, even the hidden parts.
I know I have seen a post on the Forums regarding leaks in the banding. Just can't seem to find it right now.
-"You want to make it two inches - or, if you're working in centimeters, make sure it's enough centimeters for two inches."-Red Green