Master-Seal® 590

The Master Builders MasterSeal 590 Hydraulic Cement (10 lb.) is a high-performance, fast-setting repair mortar designed to instantly stop active water leaks in concrete and masonry structures. This hydraulic cement expands as it cures, forming a watertight seal that withstands hydrostatic pressure, making it ideal for basements, foundations, retaining walls, swimming pools, and manholes.

The MasterSeal 590 is easy to apply, with minimal preparation required, and can be used in both above- and below-grade applications. It bonds effectively to damp or wet surfaces, ensuring reliability even in leaking cracks, holes, and joints. This product sets within 3 to 5 minutes, allowing for quick repairs to prevent water intrusion and structural damage. Once cured, the cement provides long-lasting protection with excellent resistance to weather, freeze-thaw cycles, and chemical exposure.

Perfect for contractors, engineers, and DIY enthusiasts, the MasterSeal 590 is an essential solution for emergency repairs and long-term waterproofing projects. Its user-friendly formulation makes it easy to mix and apply, ensuring effective results for a variety of repair needs in both residential and commercial environments.