FloodFence is made from ABS which has a higher density than water. Meaning it has negative buoyancy.
FloodFence works in fast flowing water. It is ribbed maximizing rigidity strength and rubustness when in use.
The flow of water, forces the FloodFence unit down against the ground. As the water depth increases so does the downward pressure on the units. They stick to the ground, The system is self-balancing.
The hard-wearing gaskets create a seal with ground terrain. Sealing is best on urban hard-standings.