Sealocrete Sealofoam Expanding Foam - 750ml is a quick setting polyurethane based foam, which expands on application. This easy to use expanding foam expands up to 150% its extruded volume on application. It comes in a ready to use handheld canister. Due to the quick setting properties, the foam can be cut, sawn, plastered and sealed over after approximately one hour. This expanding foam is ideal for filling irregular and large gaps and holes, both indoors and outdoors.