Zinsser Bulls Eye Zero Primer & Sealer in White prepares interior and exterior surfaces for a smooth, even paint finish. Its low-odor, water-based formula seals porous materials, blocks common stains and adheres to properly prepared wood, drywall, masonry, metal and glossy painted surfaces. The zero-VOC formulation contains less than 1 g/L VOCs, excluding colorants, and the dried primer film resists mildew. This 1 gallon container covers approximately 400 sq. ft., depending on surface porosity and application. Under recommended conditions, it dries to the touch in 30–45 minutes and can generally be recoated in one hour; allow 24 hours before painting bare cedar or redwood. Apply by brush, roller or airless sprayer, then clean tools promptly with warm water and detergent.