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    SikaSet® Waterplug (formerly known as MasterSeal® 590) - Fast setting mortar to plug active water leaks in concrete and masonry

    How does MasterSeal 590 work?

    MasterSeal 590 is a blend of hydraulic cements, well graded sands and additives supplied in dry powder form. It requires only the addition of clean water to produce a ready-to-use, ultra-rapid setting, plugging mortar.

    Recommended uses:

    • Stops active water or seepage under pressure through joints, cracks and holes in concrete or masonry, where a normal mortar would be washed away and resin would not bond.
    • For sealing cracks and construction joints in reservoirs and other water-retaining structures.
    • For instant sewer connections.
    • For rapid anchoring of bolts, conduits, pipes, railings, sanitary equipment, etc.
    • Joint filling, pointing between concrete segments in concrete and brick tunnels, sewage systems, pipes and mines.

    What makes MasterSeal 590 a unique solution?

    MasterSeal 590 is:


    • Chloride-free, will not promote corrosion of reinforcement.
    • Expands as it sets to ensure a permanent watertight seal.
    • Mechanical characteristics similar to concrete.

    Cost effective

    • Ultra-rapid setting for instant leak plugging.
    • Blocks water, no injection equipment required.

    Easy to apply

    • Only to be mixed with water.

    Environmentally friendly

    • Cement based, contains no toxic elements.

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    Surface applied capillary waterproofing system for concrete and block work

    MasterSeal 501/502

    Components of Master Builders Solutions crystalline capillary waterproofing system

    MasterSeal 590

    Fast setting mortar to plug active water leaks in concrete and masonry

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    MasterSeal 909

    Re-injectable hose waterstop system for construction and cold joints in concrete