"He who marches out of step hears another drum." ~ Ken Kesey
I think you're talking about polyken or R-tape (the blue stuff frog mentioned) It's not necessary, but can come in handy depending on your workflow and how people handle screens--more so on rollers than statics, IMHO.
Yeah, if you think there's a tape you put on the frame to glue the mesh to, I'd be interested in seeing it.