MasterSeal NP 2

Multi-component high performance polyurethane sealant

Formerly: Sonolastic NP 2

How does MasterSeal NP 2 work?

MasterSeal NP 2 is a multi-component, highly flexible, non-priming, high performance polyurethane sealant. It has been successfully tested for joint movement of ±25%. It can be tinted to multiple colors.

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 features 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

Product Information

Data Guide

Certification Letter

LEED Letter

LEED v4 Letter

Safety Data Sheet - NP2 Activator

Safety Data Sheet - MasterSeal 950 formerly NP2/SL2 Accelerator

NP2 Standard Stock Color Pack MSDS