I don't know if this has been covered before but I have an aluminum 2008 10' x 12' enclosed 2 place that I keep the sleds in. During the summer months the trailer is in storage where it has a roof over it but during the winter it stays in the driveway. I have had it about 6 years now and have noticed that the roof is leaking and is getting a little worse each season. Any suggestions on a good product to apply to the entire roof to seal it up?