PRODUCT: SONOLASTIC NP1 ONE-PART POLYURETHANE CAULKING/SEALANT, 300mL TUBE, 30 TUBES/CASE. PRICE/TUBE. APPLICATIONS: Sonneborn NP 1 Polyurethane Sealant is 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. With 800% elongation, 350 psi tensile and +/- 25% joint movement capability, NP-1 handles most every exterior application. NP-1™ requires no mixing and typically bonds to many materials without a primer, including concrete and masonry. NP1 dries with a smooth finish and is paintable.