[Red88Carrera]

What do you mean by delaminating? Is the rubber coming loose from the structure underneath? You will find that it is quite common on rigs even after the first year. As long as it isn't a huge area, and the rubber is still in good shape, it's not a problem. I would make sure that the rubber is well secured toward the front area over the cap. For any seams around vents, etc, use Eternabond tape and Dicor self-leveling sealant. If the rubber is loose in alot of areas, just walk away. There's more than enough used RVs on the market.