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    ​MasterSeal SL 1

    One component, self-leveling polyurethane se​alant​

    MasterSea​​l SL 1 description:

    Excellent flexibility that resists abrasion and punctures 

    MasterSeal SL 1 (formerly known as Sonolastic SL 1) is a one-component, non-priming, elastomeric, self-leveling polyurethane sealant designed for expansion joints in concrete floors and decks.

    Recommended uses:

    • Horizontal
    • Interior and exterior
    • Expansion joints
    • Control joints
    • Pavers
    • Plaza decks
    • Industrial floors
    • Driveways/garages
    • Sidewalks
    • Decks
    • Parking structures
    • Pitch pans

    What are the uniqu​e features of MasterSeal SL 1?

    • Variety of types and sizes of packaging to help reduce jobsite waste
    • Wide application temperature range makes MasterSeal SL1 suitable for all climates
    • Excellent weatherability for long-lasting performance

    What are the benefits of M​asterSeal SL 1?

    • Movement capability of ±35% allows expansion and contraction with joint movement
    • Abrasion resistant to provide for longer wearing and durability
    • Easy to gun for quick installation
    • No priming needed on most surfaces, offering excellent adhesion
    • Self-leveling sealant, so no tooling needed​

    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 (90.16 Kb)

    Color Reference

    pdf (231.82 Kb)

    LEED v4 Letter

    pdf (206.92 Kb)

    MasterSeal SL 1 Data Guide

    pdf (358.62 Kb)

    MasterSeal SL 1 Data Guide (French)

    pdf (382.21 Kb)

    MasterSeal SL 1 gray SDS

    pdf (516.40 Kb)

    MasterSeal SL 1 gray SDS

    pdf (397.29 Kb)

    MasterSeal SL 1 gray SDS

    pdf (315.85 Kb)

    MasterSeal SL 1 gray SDS

    pdf (255.18 Kb)

    MasterSeal Single Component Color Reference

    pdf (478.17 Kb)

    Sealant Performance Selection Guide

    pdf (668.18 Kb)