Zinsser brand is known for professional-quality, problem-solving products that make the job easy and get it done right. Make wetting wallpaper a simple, streamlined process with Rust-Oleum Zinsser 30" Wallpaper Tray. This dual-purpose prep tray can either be used as a perfectly sized water tray or as a holding place for wet paper to relax. Buy 2 and have 1 of each ready to go.