Eliminating dispensing guns, hoses, and connections that can loosen and create a hassle on the jobsite, Todol Duo-Fill 400 Two-Part Urethane Foam Sealant adheres well to most construction materials and offers multiple starts and closures. Seal it up and get out. It provides a chemical cure in one minute that is unaffected by weather. This labor-saving 13 oz. two-part can-inside-a-can dynamically expands to 3.5 gals of foam sealant.