Honeywell NP1STN12 Polyurethane Sealant 10.1 Oz Stone

Product Description

The HONEYWELL NP1STN12 is a moisture-curing, single-component polyurethane sealant in a 10.1 oz tube, supplied in a stone color finish. Formerly marketed as Sonolastic NP 1, this formulation delivers permanent elasticity and high-performance adhesion across a wide range of construction and mechanical substrates. It requires no mixing, bonds to concrete, masonry, aluminum, and wood without a primer, and achieves full cure in 5 to 7 days under ideal conditions. Joint movement capability is plus or minus 35 percent, and the product carries a rated service longevity of up to 15 years. Plumbers, general contractors, and building envelope technicians use it on both interior and exterior applications where durable, flexible sealing is required.

NP1STN12 is suited for active, vertical, and horizontal joints in residential and commercial construction. Typical applications include expansion wall joints, floor and pavement joints, curtain walls, panel walls, precast walls, window frames, structural components, dams, spillways, and stormwater drains. The formulation is approved by the USDA for use in meat and poultry processing areas and carries Canadian approval for use in food-handling establishments, making it appropriate for commercial kitchen and food-service facility installations as well. It dries smooth, is paintable, and does not generally harbor mold or mildew growth, though it does not contain a fungicide.

Key Features

• Moisture-curing, single-component formula requires no mixing and bonds without a primer on concrete, masonry, aluminum, and wood
• Joint movement capability of plus or minus 35 percent with permanent elasticity
• Skins overnight, reaches functional cure in 3 days, and achieves full cure in 5 to 7 days
• USDA approved for meat and poultry areas; Canadian approval for food-handling establishments; SWRI validated
• Meets ASTM C-920 Type S, Grade NS, Class 25 and federal specification TT-S-00230C Type II, Class A
• Also meets Corps of Engineers CRD-D-541 Type II, Class A and ISO 11600-F-25LM
• Paintable finish; rated service life up to 15 years; 12-month shelf life

Compatibility

Designed for use on concrete, masonry, aluminum, and wood substrates; suitable for interior and exterior expansion joints, curtain walls, panel walls, precast walls, window frames, structural components, dams, spillways, and stormwater drain applications.

Installation Notes

Application should be performed by qualified contractors or tradespeople familiar with sealant joint preparation standards. Surfaces must be clean, dry, and free of dust, oil, and loose material before application. Follow applicable building codes and manufacturer cure-time guidance before subjecting the joint to movement or traffic loads. Do not apply to surfaces that are wet or below the minimum recommended application temperature.

Technical Specifications

• Net Volume: 10.1 oz
• Weight: 0.8 pounds
• Color: Stone
• Sealant Type: Moisture-curing polyurethane
• Components: Single-component, no mixing required
• Joint Movement Capability: +/- 35 percent
• Skin Time: 24 hours
• Functional Cure: 3 days
• Full Cure: 5 to 7 days
• Service Life: Up to 15 years
• Shelf Life: 12 months
• Certifications: ASTM C-920 Type S Grade NS Class 25, TT-S-00230C Type II Class A, CRD-D-541 Type II Class A, ISO 11600-F-25LM, USDA approved, SWRI validated
• UPC: 00080492302141

Standard Information

• Brand: HONEYWELL
• Manufacturer Part Number: NP1STN12