Rust-Oleum Acid Blocking Primer is a 16 oz. flat primer designed to provide superior adhesion and block stains on various surfaces. This high-performance primer is ideal for use on metal, wood, and drywall, ensuring a smooth base for topcoats. Its acid-blocking properties prevent rust and corrosion, making it suitable for both indoor and outdoor applications. The easy-to-apply formula dries quickly, allowing for efficient project completion. Compliant with safety standards, this primer is a reliable choice for both DIY enthusiasts and professionals looking to achieve a flawless finish.