Ken I think seam grip may be on the thick side. The contact cement is sort of the same way but can be brushed out to make a thin application.
Paul, I will look for the Selly's. I have heard about PVA but will moisture/water weaken the bond once dry? How does it do with being rolled, folded, stuffed, etc? This isn't a critical application, but if I can get clear contact cement I'll probably go that way. I'm still curious about how the Elmer's will hold up though.
Marc, I have the soft Tyvek and have tried several painters tapes with it but all of them remove material when peeled off.