I HAVE TO PUT THIS OUT THERE

Did it just peel off around the spot you saw on the roof, or was it the whole car? I use SPI epoxy primer as sealer and mix it to the thinner side of their recommendations and have never had a problem. If it just peeled around the spot on the roof, I would think it might have been some kind of contamination in that spot? If the sealer was over mixed like the SPI guy suggests, I would think the sealer would have peeled off with it when you layed the razor blade to it. Bad deal either way, to have to redo it. :(