PL polyurethane concrete and masonry sealant is specially designed for repairing and sealing cracks or gaps in concrete or masonry. Highly flexible, providing years of longlasting performance. Weather resistant and paintable. Polyrethane is paintable and does not interfere with paint adhesion to surrounding surfaces. Bonds to most building surfaces, including concrete and metal where acetoxy silicone experiences adhesion problems. Remains elastic and has better tear resistance than silicone.