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    ​MasterSeal NP 2

    A multi-component, polyurethane sealant​

    How does MasterSeal ​NP 2 work?

    MasterSeal NP 2 (formerly known as Sonolastic NP 2) is a multi-component, highly flexible, non-priming, high-performance polyurethane sealant.​

    Recommended uses:

    • Interior and exterior
    • Above and below grade
    • Immersed in water
    • Expansion joints
    • Panel walls
    • Precast units
    • Aluminum and wood window frames
    • Roofing
    • Fascia
    • Parapets
    • Vinyl siding
    • Store front assemblies
    • Parking structures

    What are the unique feature​s of MasterSeal NP 2?

    • Wide temperature application range makes MasterSeal NP 2 suitable for all climates
    • UL listed; Passes 4–hour, 4–inch, fire and hose stream test when used with Ultra Block or mineral wool
    • Suitable for water immersion with documented performance in wet areas
    • Bulk packaging results in less waste
    • Formulated to withstand pedestrian and vehicular traffic

    What are the benefits​​ of MasterSeal NP 2?

    • Joint movement capability +/- 25% provides excellent flexibility for keeping moving joints weather tight
    • Weather resistant for long-lasting weather tight seals
    • Easy to gun and tool to speed up application and make neater joints
    • No primer required for most construction materials, lowering installation costs
    • Chemical cure allows for faster turnaround time
    • Long pot life provides extended working time

    On the Job Vid​​eos

    How to Apply MasterSeal NP 2 sealant


    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 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.

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