Great Stuff Smart Dispenser Gaps & Cracks Insulating Spray Foam Sealant 12 oz

GREAT STUFF Smart Dispenser Gaps & Cracks 12 oz is a ready-to-use polyurethane insulating spray foam sealant designed to fill, seal, and insulate gaps and cracks up to 1 inch. It expands to take the shape of openings and helps create a long-lasting, airtight, and water-resistant seal around plumbing penetrations, electrical openings, attic gaps, basement areas, window and door framing, and other common building voids.

The integrated Smart Dispenser gives better control than traditional straw cans, with precision application, reduced dripping, and reusability for up to 30 days when used properly. This makes it a practical choice for contractors, HVAC techs, maintenance teams, and homeowners who want cleaner application and less product waste.

The cured foam adheres to wood, metal, masonry, glass, and most plastics and can be used for interior and exterior applications. Once cured, it is paintable, stainable, and sandable, making it suitable for both visible finishing work and hidden sealing jobs. Under standard conditions, it becomes tack-free in about 5–15 minutes and is generally trimmable in about 1 hour.

This product is especially useful when improving energy efficiency by helping reduce unwanted airflow, moisture intrusion, and entry points for insects and allergens. For best results, use according to label directions and all applicable safety precautions, as the product is a flammable aerosol and the SDS identifies transportation as UN 1950 Aerosols, Class 2.1.