Product Description Zinsser Gardz Problem Surface Sealer is an interior sealer specifically designed to seal porous or problem areas such as stucco, uncoated wallpaper, texture finishes, plaster, cement, drywall and more. Deeply penetrates the surface creating a moisture-proof film. Ready-to-use coating strengthens soft texture finishes and binds chalky surfaces. From the Manufacturer Lock down porous and crumbling surfaces with Rust-Oleum Zinsser GARDZ Problem Surface Sealer. This low-odor, water-based formula dries to a clear, matte finish, creating a hard, paintable seal over damaged drywall, adhesive residues and other chalky surfaces.