[sourdough]

I think you need to determine exactly what they did. How much for the roof clean/seal treatment and how much to replace "seals/sealant"?

I had my roof cleaned/sealed and sealant checked in May/June and it was around $380-$400 if I recall. That included a 2 part Dicor? cleaner/sealer product that I believe retails for around $100. Our trailer is almost 38' stem to stern so is longer than yours.

I can't imagine what would be ruined on a 2 year old trailer as far as seals/sealant is concerned if you keep up with it. I'm on mine a couple of times a year looking for cracks. The sealant still looks really good and is nice and pliable even if it's a 14. It does stay inside most of the time when not in use.

Edit: Did you study the bill closely? Did they per chance bill you to repair the underbelly again, and/or hide it in the balance charged? Gotta watch those dealerships.