I have a corner that pulled up a little when I removed some masking tape and would like to know if there is a caulk available to hold this down and if so where I might purchase it. Also on the leading edge of my rv roof there is a edge where I removed the masking tape, looks to me that the wind may eventually start to get under it. could I caulk this area also? should I not have used masking tape and just let it run down the front?