Designer Harmony

MASTERSEAL NP1

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MasterSeal NP 1 is a one-component, acoustic/sound damping, elastomeric, gun-grade polyurethane sealant

Formerly: Sonolastic NP 1

MasterSeal NP1 Product Data Sheet

MasterSeal NP1 Color Chart

MasterSeal NP1 Guide Spec

MasterSeal NP1 Brochure

MasterSeal Sealant Selection Guide

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

Substrates

  • Concrete
  • Masonry
  • Aluminum
  • Wood
  • Clay & concrete roof tiles
  • Stucco
  • Natural stone

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
  • Can adhere to green concrete up to 72 hours after pour.

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 

Compliances

  • ASTM C 920, Type S, Grade NS, Class 35, Use NT, M, A, T, O* and I
  • Federal Specification TT-S- 00230C, Type II, Class A
  • Corps of Engineers CRD-C- 541, Type II, Class A
  • Canadian Specification CAN/CGSB-19.13-M87, Classification MCG-2-25-A-N, No. 81026
  • CFI accepted
  • Underwriters Laboratories Inc.® classified (fire resistance only)
  • ISO 11600-F-25LM
  • STC (sound transmission class)