Next time you are near a paint store or one of the big boxes that sells Kilz products, go in and ask them if they have a display of Gardz on a piece of drywall.
You'll be impressed.
Doesn't matter where you live.
Very few products will stick well to drywall once the outer layer of paper has been removed. Nor will water based products adhere well to water soluble wallcovering adhesives.
Most professional painters use Gardz when that is the case.