Yes, sand-filled sandbags can stop flooding and water.
What allows sandbags to stop flooding and water is the sand contained inside the sandbag. The sand is fine enough that it can stop individual water molecules from going through.
However, it is important to note that the polypropylene, the type of plastic material used to make the sandbag, is not what stops water. When sandbags are filled with a coarser material such as gravel, gravel-filled sandbags do not stop flooding or water.
Be sure to fill either one of these sizes of sandbags with sand to protect your property from flooding.
Choose a sandbag size to learn more
14" x 26" (most popular)
18" x 30"