Ok, since I have not receive any advise. If I have a rubber roof. I know they are laid in sheets, however, the area I need to replace is pretty small. Can I use a smaller peice of the rubber roofing material and piece it into the the area that needs to be repaired. It was a seam leak and I don't want to shell out for an entire new roof if I can piece the rubber in and use Etrnabond to seal the junction.