Well, they say it sets up like an epoxy if you lay it in wet.
Depending on the amount, I wouldn't disagree with that, Rusty. Use a 16th, and you'll jerk underlayment off the floor if you come back to remove vinyl. That adhesive is wicked strong. With a 32nd, though, it can be taken up. It ain't like pulling up a carpet tile, but it will come up. I just don't see the advantage to anyone in a releasable sheet install. We all know the modular dealio with carpet tile, but what gives with sheet goods?
It goes to the makeup of the adhesive if you ask me. Vinyl backed material is non-porous. You have to have something that can bond to a closed cell surface in order to hold it in place. That reminds me, I had something pretty cool happen several months ago. Did a big job of heavy, vinyl backed material and used the adhesive that was sold with the job. It was in the middle of nowhere and they sold multi-purpose. O well. Screwit. I glued the whole place down and it was perfect. About a month later, I got a call, and they said there were wrinkles. Wrinkles? Yes. Wrinkles.
I go down there and the entire 120 yards had totally released from the adhesive they bought. Granted it was a what passes for a "high solids" adhesive these days, so it was loaded with clay, but the whole job was just sitting there over a bed of dried adhesive loose.
I just glued it back down with pressure sensitive and a hundred pound roller. 30 minutes. No lie. All better. Pretty cool.