[JRTJH]

[QUOTE=Rick;363905...
Is there any reason I can't use Eternabond instead of Dicor for the areas that are going horizontal (where roof meets metal going down the front)?
..."[/QUOTE]

You physically can install Eternabond tape anywhere. The question is: Is it a wise and prudent action?" The answer is, in places where you may need access to repair or adjust a component, a "permanent" repair is not wise.

There is a reason that screws are used to install the molding on the trailer edges and corners. That molding may need to be removed to make repairs in other areas. There's a reason DICOR is used (instead of Eternabond). DICOR can be removed to facilitate access to the underlying structure. Eternabond can't be removed without a good likelihood of damaging the underlying structure. That means, if you ever need to remove the molding, if it ever gets loose and you need to tighten the screws, if the vinyl "screw cover strip" ever dries out and needs to be replaced, you can't remove the Eternabond without risking significant damage to any of those underlying structures.

DICOR is the appropriate product to seal that area. Don't try to make things better by actually making them "permanent".