Quick Dam Sandless Sand Bag 6pk 12ix24i. Protect your home or property in times of flooding with Quick Dam Flood Bags. These sandless sandbags are ready to use - just lie in place and let the water do the rest. Flood Bags expand and activate on contact with water, growing in size to absorb, contain, and divert problem water. Flood Bags are light weight and easy to use. Stack multiple Flood Bags to increase the wall height. Keep Flood Bags on hand for emergency situations. Each Flood Bag absorbs 4 gallons of water and grows to 3.5in high in minutes