Unfortunately Thor California (not thor industries) is out of business - was bought out by another company who also went under (from what i hear). Up here in canada there is not a lot of information on dealers who will service this model.
If I had access to a customer service department that would be my first choice - do you happen to know if there still are dealers for these trailers that will service them? I cant remember what sealant I used but it came highly recommended - thers is defintately a large leak somewhere though, but without tearing up the inside of the roof or walls, i really cant locate it. I suppose I will ahve to think of something creative.
Any other suggestion on sealant? Dicor apparently does not ship to Canada. I will check out the insulation, but what will that tell me? Since the floor appears to be rotting from the bottom up, I will assume that the insulation under the floors in the front storage will be saturated as well.