Zinsser 2300 Problem Surface Sealer, 5 Gallon, Clear 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. Features Use on porous areas such as ceilings, interior walls and related surfaces prior to texturing, wallcovering or painting Water-based, low odor formula applies with a milky-blue/white tint for proper coverage and dries Clear Covers up to 2250 sq ft and dries to the touch within an hour Unique coating seals adhesive residue and protects drywall from tearing, blistering and more Creates a Clear, hard, flat finish ready for topcoat USA SHIPPING estimates delivery times and we work to get your item to you as quickly as possible and within those times, but please know it may take slightly longer than the estimate.