Zinsser ShieldZ Universal wallcovering primer is a one-step, mildew-resistant, high-hiding primer for use on all surfaces, with all adhesives and under or over all wallcoverings. ShieldZ Universal provides excellent adhesion and makes wallcovering removal easy later. Designed for use on existing wallcovering, paneling and gloss surfaces. Use on regular paint, porous flat paint or unprimed drywall.Eliminates split seams and curled edgesSticks to all surfaces without sandingCompatible with all adhesivesPrevents drywall tearing when stripping wallpaperFast drying, low odorSafe, water cleanup