MasterSeal NP 1: One-component, elastomeric, gun-grade polyurethane sealant
Formerly: Sonolastic NP 1

How does MasterSeal NP 1 work?

MasterSeal NP 1 is a one-component, high performance, non-priming, gun-grade, elastomeric polyurethane sealant. It requires no mixing and typically requires no priming to bond to many materials, including concrete and masonry.

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

What are the unique features of MasterSeal NP 1?

  • Available in ProPaks, reducing jobsite waste, lowering disposal costs
  • 12 standard colors to match a wide variety of common substrates
  • Wide temperature application range makes MasterSeal NP 1 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
  • Meets VOC requirements in all 50 states

What are the benefits of MasterSeal NP 1?

  • One-component formula requires no mixing, helping to reduce labor costs
  • Joint movement capability ±35% provides excellent flexibility for keeping moving joints weathertight
  • Easy to gun and tool, speeding up application and making neater joints
  • No primer required for most construction materials lowering installation costs
  • Weather resistant for long-lasting weather tight seals
  • Compatible with non-rigid coatings and can be painted
  • Superior holding power for long-lasting roof tile installation

Safety Data Sheet (SDS)
Find all available safety data sheets for this product >> More.

MasterSeal NP1 Brochure(pdf, 1.72 Mb)
Data Guide ( pdf, 351.13 Kb
Guide Spec(doc, 143.00 Kb)
Color Reference(pdf, 168.36 Kb)
LEED Letter (pdf, 72.91 Kb)
LEED Letter (pdf, 54.79 Kb)
LEED v4 Letter ( pdf, 39.91 Kb)





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