Rust-Oleum Block Filling Primer in a 5-gallon bucket is engineered for superior coverage and adhesion on porous surfaces. This flat primer fills and seals cracks in concrete and masonry, creating a smooth, even base for subsequent paint layers. Its high-build formula is perfect for both interior and exterior use, ensuring durability and longevity. Compliant with industry standards, this primer is ideal for large-scale residential and commercial projects, providing a reliable foundation for lasting finishes.
