Thanks for the input everyone. I'm still keen to know why they don't seal the walls themselves first, but probably only the mfr knows the answer to that. I'm going to guess "it's cheaper to not seal the edges."
OK so let me phrase the original question a bit differently - if you could seal the edges of the laminate walls without affecting the installation (or removal) of windows and other fixtures, what would be the downside? Like what about just a couple of coats of epoxy? It makes no sense to me to leave the walls open to moisture, but...does the laminate need to "breathe" or something, in a way it can't do through the interior paneling?
Also had the center brake light leak into the rear wall. The brake light has a rubber gasket that barely sealed around the hole in the wall for the wires. Dicor fixed that.
Yep, my center brake light has the same issue and both screws had stripped to boot. Luckily there's no visible water damage in the area (yet). I fixed the holes with Mr. Grip (http://tinyurl.com/glvpprk) and the lens seems to fit tighter now, but the gasket isn't really very compressed. I was thinking of cutting a new gasket out of thicker material. Did you just replace the gasket entirely with a bead of Dicor around the edge? I've never used the stuff - can it be applied and smoothed like caulk, for a clean look? Easy to remove the lens if the bulb goes out?
Thanks again for all the help.
