Honeywell NP1WHT12 Polyurethane Sealant 10.1 Oz White

Product Description

The HONEYWELL NP1WHT12 is a single-component, moisture-curing polyurethane sealant supplied in a 10.1-ounce cartridge. Formerly sold as Sonolastic NP 1, this formulation delivers permanent elasticity and high performance across a wide range of joint applications. It handles both active and static joints on vertical and horizontal surfaces, interior and exterior. The sealant bonds to concrete, masonry, aluminum, and wood without requiring a primer, and it does not require mixing before application. It skins overnight, reaches functional cure in approximately three days, and achieves full cure in five to seven days. Joint movement capability is rated at plus or minus 35 percent. Longevity is rated up to 15 years under normal service conditions.

This sealant is designed for use on expansion wall joints, floor and pavement joints, curtain walls, panel walls, precast concrete walls, window frames, structural components, dams, spillways, and storm water drains. It is suited for both residential and commercial construction applications and is regularly installed by contractors working with concrete, masonry, and glazing systems. USDA approval covers use in meat and poultry processing areas, and Canadian approval covers food-handling establishments, making it appropriate for regulated facility work. The white color blends with light-colored substrates and is paintable after cure.

Key Features

• Moisture-curing polyurethane formula with permanent elasticity and up to 15-year service life
• Bonds to concrete, masonry, aluminum, and wood without a primer
• Plus or minus 35 percent joint movement capability
• Single-component — no mixing required
• Paintable after cure; skins in 24 hours, full cure in 5-7 days
• USDA approved for meat and poultry areas; Canadian food-facility approval; SWRI validated

Compatibility

Designed for use on concrete, masonry, aluminum, and wood substrates across active vertical and horizontal interior and exterior joints including expansion joints, pavement joints, curtain walls, panel walls, precast walls, window frames, structural components, dams, spillways, and storm water drains.

Installation Notes

Installation is typically performed by licensed contractors, glaziers, or construction trades familiar with joint sealant applications. Before applying, ensure the joint surfaces are clean, dry, and free of dust, oil, and loose material. Verify joint dimensions are within the product's movement capability range before proceeding. Apply in accordance with ASTM C-920 guidelines and any applicable local building codes.

Technical Specifications

• Net Weight (Cartridge): 10.1 ounces
• Package Weight: 1 pound
• Color: White
• Chemistry: Polyurethane, single-component moisture-curing
• Joint Movement Capability: plus or minus 35 percent
• Cure Schedule (Ideal Conditions): Skin — 24 hours; Functional — 3 days; Full Cure — 5-7 days
• Longevity: Up to 15 years
• Shelf Life: 12 months
• Certifications: Federal Spec TT-S-00230C Type II Class A; ASTM C-920 Type S Grade NS Class 25; Corps of Engineers CRD-D-541 Type II Class A; ISO 11600-F-25LM; USDA approved; SWRI validated
• UPC: 00080492301441

Standard Information

• Brand: HONEYWELL
• Manufacturer Part Number: NP1WHT12