Product Features


Masterseal np1, 10.1 oz, aluminum gray, 1 component, high performance, non-priming, gun grade, elastomeric polyurethane sealant, it requires no mixing & typically requires no priming to bond to many materials, including concrete & masonry.


  • Aluminum Gray Color

  • 10.1 Ounce Tube

  • 26 Linear Feet Approximate Coverage

  • Excellent Flexibilty and Adhesion

  • Water & Weather Resistant

  • Easy to gun and tool, speeding up application and making neater joints

  • Skins overnight and fully cures within a week

  • One-component formula requires no mixing, helping to reduce labor costs

  • No primer required for most construction materials lowering installation costs

  • Wide temperature application range makes MasterSeal NP 1 suitable for all climates

  • Meets VOC requirements in all 50 states

  • UL listed; Passes 4–hour, 4–inch, fire and hose stream test when used with Ultra Block or mineral wool

  • USDA compliant for use in meat and poultry areas

Product Features

Masterseal np1, 10.1 oz, aluminum gray, 1 component, high performance, non-priming, gun grade, elastomeric polyurethane sealant, it requires no mixing & typically requires no priming to bond to many materials, including concrete & masonry.