Oh I said spray adhesive, not spray interfacing. My interfacing didn't have any sticky stuff, so I bought a can of spray adhesive to make them stick together. Rumor had it on the Internet somewhere you could buy Spray Stablizer, that would wash out (which would be great because then when the quilt is done all that is left in the quilt is the wonderfully soft fabric), but I looked and looked locally and couldn't find it.