A unique water-based sealer for porous and potential problem surfaces. Zinsser Gardz is formulated to deeply penetrate and dry to a hard, moisture resistant film that seals and binds down porous, chalky and crumbling surfaces, paints and textured finishes. Zinsser Gardz takes the "problem" out of problem surfaces. Deeply penetrating, it dries to a rock-hard, water-resistant finish; this protects surfaces from damage during the next redecorating project.Zinsser Gardz is recommended for damaged drywall, new drywall, spackling and joint compound skim coats, plaster, calcimine, uncoated wallpaper, wallcovering adhesive residue, textured paint and more. Key Features & BenefitsRepairs torn paper on damaged drywall, eliminates bubblesSeals old wallpaper adhesiveWater-based, low odour, dries clearDries fast to a hard, moisture-proof filmBinds down chalky surfacesCan be applied to high-pH surfacesCleans up with soap and water