It looks like Geocel makes a type but heaven help my local stores if they should carry Geocel. I've seen Geocel Ultima, is it it? Not too clear from the label.
What is a good sealant for roofing purposes?
The problem that I;m having is that the very top piece (the crown pieces?) aren't lying flat with just two nails. I'm envisioning having to put some adhesive under it and laying a brick on it to flatten it down. or will it flatten down over time from the sun? Plus I have all the loose shingles where I had to weave the new roof with the old that need sticking back down.