Hi, we recently used Zinser Gardz at my daughters house to seal plasterboard walls after removing the wallpaper. We painted over the Gardz and the end result was really good. I wondered if anybody knows if Zinser Gardz can be used on brick plastered walls. It says for dry lining on the tin. Or is there another product you can use on plastered walls for sealing in any old wallpaper paste. Thanks for your helpi