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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


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    LEED v4 & v4.1

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    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)