How are the seams treated? Are they glued?

Our 8mm Strong Rubber Rolls - Designer Series can be loose laid without having to glue the seams at all. If you are looking to make the seams watertight, we do recommend using our Seam Sealer glue. Since there can be some variance in the width of our rubber rolls, if you have any gapping, our Seam Sealer glue can be used as well to fill in any gapping. The typical preferred method is to just cut the rolls so that the seams but up nice and tight appearing virtually seamless.