VapAir Seal Flashing Foam is a low-pressure foam system that utilizes a non-flammable blowing agent. The foam is used to seal penetrations and helps to lower heating and cooling costs by reducing air leakage. Spray foam onto any clean, dry surface in any direction to insulate, fill, and seal various sized voids. It is specifically designed to spray onto flat or irregular surfaces and to fill large cavities. To complete the flashing around penetrations, VapAir Seal Flashing Foam is applied below the insulation level.