Originally Posted by sww914
Is the original black sealant
hard or is it sticky? Butyl tape stays sticky, urethane is hard. Wax, grease, and silicone remover does a great job on butyl tape after you remove most of it with a razor blade. If it's urethane you don't need to remove it all, you can trim it down with a razor blade ( a nice sharp new one) nice & smooth and squeeze a bead of new urethane right on the thin remnant of the old bead. If it's flexible but not sticky it is silicone. If it's silicone you need to remove it all. You can slide a razor blade along on top of the fiberglass
and get most of it off and then scrape the rest off with the razor blade perpendicular to the surface and use acetone.
This is exactly what I needed to know thanks. This is a great thread with lots of good advice but I love it when someone hits the nail on the head
. Non sticky and flexible. Now that I have my window out I am going to have to wait for it to stop raining. We hadn't had much rain all spring... Until I took out my window