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

US / Canada Product Inform​​ation

Data Guide

Data Guide (French)

Data Guide (Spanish)

Certification Letter

LEED Letter

LEED v4 Letter

Safety Data Sheets​ (SDS):

MasterSeal NP 2 - A​​​ctivator

MasterSeal NP 2 - Alumin​​um Gray

MasterSeal NP 2 - finPAR​​T Ab

MasterSeal NP 2 - Lime​​​stone

MasterSeal NP 2 - Pig Sp​c Disp

MasterSeal NP 2 - Pre ​​Gray

MasterSeal NP 2 - Preti​nt Precast Gray

Canada - French

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 BASF construction product.

Related Literature

Certification Letter

pdf (55.41 Kb)

Data Guide

pdf (77.74 Kb)

Data Guide (French)

pdf (305.55 Kb)

Data Guide (Spanish)

pdf (134.00 Kb)

Guide Spec

doc (113.47 Kb)

Joint Sealants Brochure - Spanish

pdf (749.31 Kb)

LEED Letter

pdf (73.42 Kb)

LEED v4 Letter

pdf (70.00 Kb)


pdf (54.99 Kb)

Sealant Performance Selection Guide

pdf (872.11 Kb)

zip (56.48 Kb)