DAP Wall & Cavity Foam with Wide Spray Applicator – 20 oz, Off White

DAP Wall & Cavity Foam with Wide Spray Applicator is a self-contained, one-component polyurethane foam delivered in an easy-to-use wide-spray aerosol can. It blends the convenience of a single-part system with a spray pattern that approximates two-component products, helping you cover larger areas more efficiently without a second mix. The foam is designed for interior air sealing and insulation across a variety of substrates, including wood, masonry, metals, and drywall, making it a versatile option for many common projects.

In real-world use, the closed-cell formulation helps limit moisture intrusion while delivering reliable thermal performance. The product is suitable for rim joists, crawlspaces, attics, basements, and other cavities where sealing and insulation matter. The wide broadcast spray pattern and responsive flow control trigger help you achieve a consistent, wide-angle coat, reducing the need for lengthy touch-ups and multiple passes. As you work, you’ll notice a texture and tack-free finish developing in minutes, with the full cure completing in a few hours depending on thickness and ambient conditions. This balance of ease, speed, and performance can support a smoother workflow on both new builds and retrofit projects.

Performance you can rely on

The product’s closed-cell chemistry helps resist moisture and contributes to improved energy efficiency by sealing out drafts. It is rated to meet interior building codes with a Class A fire rating in the tested configuration, offering additional peace of mind for enclosed spaces. In addition, applying in a temperature range of 40°F to 120°F makes it a flexible choice for year-round projects. The package includes an applicator so you can start sealing without hunting for extra tools.

• Use to fill, air seal, and insulate cavities in walls, rim joists, crawlspaces, attics, and basements.
• Moisture resistance and interior-friendly formulation support durable, code-compliant installations.
• Fast tack-free time (7–12 minutes) and full curing in about 4 hours.
• Patent-pending technology delivers a broad spray pattern and easy one-part handling.
• Enhances R-value and reduces air leakage for year-round comfort and potential energy savings.
• Suitable for a variety of materials and surfaces, including wood, masonry, metals, and drywall.

Quick tips and use cases

For rim joists and small repairs, the foam’s wide spray helps you reach corners and tight spots. In attics and basements, it forms a tight seal around framing members and penetrations, while keeping the interior surfaces uncluttered by requiring fewer separate materials. The off-white color blends well with many interiors and can be finished with standard coverings once cured. Always follow safety guidelines, work in a ventilated area, and consult product data for cure times under your specific conditions.