Well my roof usually leaks when it heavily rains, so today i took out my headliner. I have an aftermarket sunroof in my car, and it seems that there is black sealant or silicone around the edges, but not in some places. So i want to go back around and fill in this entire seam. What should i use? Just regular black silicone and bead it around, or use an expoy type product or something else?