I've got a couple of roof leaks on our new (to us) 87 Sovereign
. I'm wondering if we need to scrape off all the old sealants/cailk and start over, or add sealant to the existing base filling in all the visible cracks and checks? What do y'all recommend for a job like this. We've got a tube of the Vulkem 116 polyurethane sealant. Will that do the job? Or should we get something else?