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    ​MasterSeal 550

    Flexible, cementitious waterproofing membrane

    How does MasterSeal 550 work?

    MasterSeal 550 is an acrylic-modified, portland cement-based flexible, waterproofing membrane for concrete and masonry. Use it above or below grade on interior or exterior surfaces.

    Recommended uses:

    • Walls and floors
    • Tiled pools and fountains
    • Plaza decks
    • Balconies
    • Mechanical rooms

    What are the features of MasterSeal 550?

    • Waterproof membrane
    • Creates a flexible membrane
    • Breathable
    • Ready-to-use kit

    What are the benefits of MasterSeal 550?

    • Protects against soil moisture and water seepage; extends life of structural slabs and underlayment
    • Accommodates substrate movement; prevents cracks from telegraphing; provides excellent underlayment for thin-set tile applications
    • Allows interior moisture vapor to escape
    • Easy to mix and place
    • Low odor

    Direct contact

    Master Builders Solutions Technical Support

    Construction Systems

    1-800-243-6739

    Safety Data Sheet (SDS)

    Find all available safety data sheets for this product.

    Product Certifications

    Generate a free certificate of conformance for a specific Master Builders Solutions construction product.

    LEED v4 & v4.1 Teaser Image

    LEED v4 & v4.1

    Search by product or CSI code and download up to date LEED information.

    Related Literature

    Certification Letter

    pdf (90.88 Kb)

    Data Guide

    pdf (197.57 Kb)

    MasterSeal 550 Part A SDS

    pdf (407.02 Kb)

    MasterSeal 550 Part A SDS

    pdf (209.54 Kb)

    MasterSeal 550 Part A SDS

    pdf (236.45 Kb)

    MasterSeal 550 Part A SDS

    pdf (295.25 Kb)

    MasterSeal 550 Part B SDS

    pdf (297.46 Kb)

    MasterSeal 550 Part B SDS

    pdf (197.40 Kb)

    MasterSeal 550 powder SDS

    pdf (331.38 Kb)

    MasterSeal 550 powder SDS

    pdf (269.57 Kb)