MasterSeal NP 2 - A multi-component high performance polyurethane sealant

Formerly Sonolastic NP 2


MasterSeal NP 2 is a multi-component, highly flexible, non-priming, high performance polyurethane sealant. It has been successfully tested for joint movement of ±50%. It can be tinted to multiple colors.

Where is MasterSeal NP 2 applied?

  • 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 advantages of MasterSeal NP 2?

  • Movement capability of ±50% adds protection against unanticipated movement 
  • Weather resistant for long-lasting weathertight seals 
  • Easy to gun and tool to speed up application and make neater joints 
  • MasterSeal 905 accelerator available for use in cold climate applications to help speed initial cure 
  • No primer required for most construction materials, lowering installation costs 
  • 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 
  • Chemical cure allows for faster turnaround time 
  • Bulk packaging results in less waste 
  • Long pot life provides extended working time 
  • Formulated to withstand pedestrian and vehicular traffic

Product Information

Technical Data Sheet


MasterSeal NP 2 TDS

pdf (450,72 Kb)