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.

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