Rust-Oleum Block Filling Primer in a 1-gallon container is designed for optimal adhesion and coverage on porous surfaces. This flat primer effectively seals and fills cracks in concrete and masonry, ensuring a smooth base for topcoats. Its high-build formula enhances the durability of your paint job, making it ideal for both interior and exterior applications. Compliant with industry standards, this primer is perfect for residential and commercial projects, providing a reliable foundation for long-lasting finishes.
