Zinsser Gardz Problem surface sealer is a clear, water-based acrylic resin sealer designed for interior application to porous surfaces prior to painting, texturing or wall covering. Gardz is recommend for sealing problem porous surfaces such as bare or damaged drywall, plaster, cement and cementitious coatings, spackling paste and joint compound, calcimine, stucco, acoustic and texture finishes and uncoated wallpaper.Repairs torn paper on damaged drywall, eliminates bubblesSeals skim coats and spacklingProtects new drywallSeals old wallpaper adhesiveEasy to apply, high spread rate, fast dryingWater-base, low-odor and dries clear