OK, so here I have a 2012 Northern Lite. The seam where the 2 halves come together was sealed with butyl and has oozed out since it was new and now it has stopped. I cleaned off the excess off the upper portion where it had oozed out(really looked ugly without cleaning up). I was going to seal this upper side (not with silicone) but what I'm hearing is I should just leave it alone and just check my screws around the two halves and put sealant in the holes of the screws and put them back in? My vinyl insert has the screws in the ends of them to keep them from pulling apart.