Shieldz, Gallon, Universal Wallcovering Primer, One Step, White Pigmented Water Base Wallcovering Primer For Use On All Surfaces With All Types Of Wallcoverings, Primes, Seals, Sizes & Hides In One Coat, Makes Hanging Easier, Prevents Drywall Damage During Removal, Medium Tintable, Low Odor, Now Formulated With Zinsser"s Mold & Mildew Shield, Mold & Mildew Preventative, Covers 400-500 SQFT.