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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

    Direct contact

    Master Builders Solutions Technical Support

    Construction Systems

    1-800-243-6739

    Product Certifications

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

    Related Literature

    Cert Letter

    pdf (90.62 Kb)

    Guide Spec

    doc (131.50 Kb)

    MasterSeal NP 520 Data Guide

    pdf (209.58 Kb)

    MasterSeal NP 520 black SDS

    pdf (267.88 Kb)

    MasterSeal NP 520 brown SDS

    pdf (210.82 Kb)

    Sealant Performance Selection Guide

    pdf (668.18 Kb)