Masterseal 1025568 10.1oz Black NP-1 Sealant One Part Polyurethane Sealant-1PK LANC-6424

A one-component high-performance gun-grade moisture-curing polyurethane sealant designed for a wide range of sealing and caulking applications in active exterior joints. NP-1 requires no mixing and typically bonds to many materials without a primer, including concrete and masonry.