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    Sika Thoroseal®-581 (formerly known as MasterSeal® 581) - A waterproof cement-based coating for concrete and masonry

    How does MasterSeal 581 work?

    MasterSeal 581 is a Portland cement-based coating for concrete and masonry that resists both positive and negative hydrostatic pressure. Polymer-modified with MasterEmaco A 660, MasterSeal 581 creates a low maintenance and highly durable waterproof barrier.

    Recommended uses:

    • Vertical and light-pedestrian horizontal surfaces
    • Interior and exterior
    • Above and below grade
    • Alternative to mechanical finishing or rubbing of concrete
    • Waterproofing basement and retaining walls
    • Foundations
    • Bridges and tunnels (non- traffic barring surface)
    • Water cisterns

    What makes MasterSeal 581 a unique solution?

    • Waterproof to help protect building interiors from dampness and moisture damage
    • Breathable, allowing interior moisture to escape without damaging coating

    How can you benefit from MasterSeal 581?

    • Resistant to both positive and negative hydrostatic pressure, making MasterSeal 581 suitable for use below grade interior and exterior and in water treatment construction
    • Compatible with high-performance coatings, including a wide range of architectural coatings and textured finishes
    • Hides minor surface defects and blemishes in architectural concrete
    • Available in ten landscape colors and custom colors (with minimum order quantities)