Convenient aerosol that dispenses a one-part liquid urethane foam that expands 200% to 300% and cures to a durable, hard foam, insulating sealant. Fills large cracks and holes that caulk cannot. Forms an airtight, water resistant and weather resistant bond on surfaces such as masonry, wood, metal, glass, tile, and most plastics. Helps eliminate energy escape. Prevents the entrance of insects or rodents. Dries tack-free in 15-30 minutes and cures completely in 8-24 hours, depending on humidity. Easy to apply. Conforms to any shape.