Sealant question

Pic would help. Mine was just above storage compartment that manufacture cut siding to short and it came loose.

I was thinking of the upper ones. not along the compartments.
Sounds like it is there for cosmetics.

Thanks for the answers. But I'm still confused. The molding I'm talking about seems to be a trim strip to hide the hinges for the basement doors. It's attached to the outside of the sidewall and overlaps the basement doors just enough so you don't see the hinges. the basement doors close against a rubber bulb seal. So I don't see how water getting in between the trim strip and the sidewall would leak into the sidewall or the basement compartments. But, I'm not very savvy on technical stuff, so maybe I'm missing something. Winnebago must have put the sealing (looks like clear silicone) on for some reason.

C&J wrote:
The sealant along the top of the molding strip that separates the sidewall of the motorhome from the tops of the basement doors has cracked and separated in spots. Is this anything more than a cosmetic problem

Yes, might keep splitting and cracks could turn into bigger cracks.

Yes, it keeps water from entering sidewalls. depending on construction of your rig, it can cause rotting or delamination of sidewall.
Dicor lap sealant or Dicor self leveling is used to go over the existing.