POLYURETHANES STORED IN A SINGLE CONTAINER UNDER PRESSURE AND FORMULATED TO BE FOAMED IN PLACE UPON EXPOSURE TO AMBIENT AIR AND TO BE LAID IN A BEAD-LIKE FORM FOR USE AS A SEALANT AROUND NARROW OPENINGS IN STRUCTURES; SUCH AS, ABOUT WINDOW FRAMES, DOOR FRAMES, AND BASE PLATES, BUT EXCLUDING ROOFS AND ROOFING APPLICATIONS