Accufoams 2.8 lb. Roof Foam Closed-Cell Regular Spray Foam Insulation is easy to apply and bonds well to a variety of roofing materials, including metal, wood, and concrete. As it expands upon application, it fills gaps and cracks, creating a seamless, monolithic layer that helps protect against moisture infiltration and improves the overall integrity of the roof. Accufoam's 2.8 lb. closed-cell spray foam is an effective solution for those looking to upgrade their roof insulation with long-lasting performance and superior energy savings.