Please login with your username and password.


Can’t remember your accounts password?

Can't access your account?

Select your language.

This page is available in the following languages:

    Please select your location

    MasterSeal SL 1

    One component, self-leveling polyurethane sealant​

    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

    US / Canada Product Inf​ormation

    Data Guide

    Data Guide (French)

    Data Guide (Spanish)

    Certification Letter

    LEED Letter

    LEED v4 Letter

    Color Reference - MasterSeal SL 1

    Color Reference - MasterSeal Single Component

    Safety Data She​ets (SDS):

    MasterSea​l SL 1

    MasterSeal SL ​1 - Gray

    MasterSeal SL 1 - L​imestone

    MasterSe​al SL 1 - G Prepolymer

    MasterSeal SL​ 1 - LTB Prepolymer

    Direct contact

    Master Builders Solutions Technical Support

    Construction Systems


    Safety Data Sheet (SDS)

    Find all available safety data sheets for this product.

    Product Certifications

    Generate a free certificate of conformance for a specific BASF construction product.

    Related Literature

    Certification Letter

    pdf (55.36 Kb)

    Color Reference

    pdf (89.38 Kb)

    Data Guide

    pdf (109.24 Kb)

    Data Guide (French)

    pdf (147.34 Kb)

    Data Guide (Spanish)

    pdf (131.40 Kb)

    Joint Sealants Brochure - Spanish

    pdf (749.31 Kb)

    LEED Letter

    pdf (74.21 Kb)

    LEED v4 Letter

    pdf (69.99 Kb)

    Sealant Performance Selection Guide

    pdf (872.11 Kb)