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    ​MasterSeal NP 520: Siliconized acrylic latex, acoustic/sound damping sealant

    How does MasterSeal NP 520 work?

    MasterSeal® NP 520 is a single component, siliconized acrylic latex sealant formulated to provide easy gunnability, tooling and a fast setting seal with minimal shrinkage. It provides enhanced adhesion and weather ability, making it an ideal solution for many interior and exterior sealing applications.  Used as an acoustical sealant, MasterSeal NP 520 reduces sound transmission in partition systems to support high STC values by sealing spaces around cut-outs and at perimeters of partitions. The sealant cures to a tough rubber to form a long-lasting acoustical seal.

    Recommended uses:

    • Vertical or horizontal
    • Exterior or interior
    • Concrete joints
    • Joints with low movement
    • Hollow core sealings
    • Floor planks
    • Window and door frames

    What are the unique features of MasterSeal NP 520?

    • Formulated to reduce shrinkage and cracking that commonly occurs in acrylic latex sealants
    • Product can be painted after 2 hours
    • Easy to gun and tool
    • Non-flammable, suitable for use in interior applications

    What are the benefits of MasterSeal NP 520? 

    • Mulitple package sizes, sized just right for the project
    • Paintable sealant, ensures compatibility with coatings
    • Easy to gun and tool, increasing production quality


    US / Canada Product Information

    Data Guide

    Certification Letter

    LEED Letter

    Guide Spec

    Safety Data Sheets (SDS):

    MasterSeal NP 520 - Colors

    MasterSeal NP 520 - Almond

    Canada - French

    MasterSeal NP 520 - Aluminum Stone

    MasterSeal NP 520 - Ash Brown

    MasterSeal NP 520 - Black

    MasterSeal NP 520 - Bronze

    MasterSeal NP 520 - Brown

    MasterSeal NP 520 - Cameo

    MasterSeal NP 520 - Coppertone

    MasterSeal NP 520 - Dark Tan

    MasterSeal NP 520 - Summer Gray

    MasterSeal NP 520 - White

    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 BASF construction product.

    Related Literature

    Cert Letter

    pdf (26.18 Kb)

    Guide Spec

    doc (112.35 Kb)

    Joint Sealants Brochure - Spanish

    pdf (749.31 Kb)

    LEED Letter

    pdf (137.90 Kb)

    MasterSeal NP 520 Data Guide

    pdf (98.50 Kb)

    Sealant Performance Selection Guide

    pdf (872.11 Kb)