Product Description

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.

Used as an acoustical sealant, MasterSeal NP 1 reduces sound transmission in partition systems to support high STC values by sealing spaces around cut-outs and at perimeters of partitions. The sealant cures to a tough rubber to form a long-lasting acoustical seal.

Product Highlights:
• 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
• Available in ProPaks, reducing jobsite waste, lowering disposal costs
• 12 standard colors to match a wide variety of common substrates
• No primer required for most construction materials lowering installation costs
• Weather-resistant for long-lasting weathertight seals
• Wide temperature application range makes MasterSeal NP 1 suitable for all climates
• Compatible with non-rigid coatings and can be painted
• Superior holding power for long-lasting roof tile installation
• 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
• Can be used as an acoustic sealant to increase system STC value
• Minimizes sound transfer and supports high STC ratings

Applications:
• 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
• Storefront assemblies

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