Skylight install

I am installing a skylight on the angled roof of my trailer. I will seal it with SB 140 recommended by manufacturer. It will be visible. Is there some kind of sealant tape that could go over the perimeter of the unit to “dress it up” a bit? If I make a trim piece around it will likely hold water a bit.
Thanks ahead of time for any help.
Thanks ahead of time for any help.