Remove outer packaging. Then open the vacuum-sealed bag and remove the FloodSax®.
Energise your FloodSax®. This can be done by soaking the FloodSax® with water until they are fully expanded. This should take 2 to 3 minutes.
You can soak your FloodSax® in the sink, a bucket or a wheelbarrow. You can use a hosepipe or watering can. You can use rain water.
After energising, place one long FloodSax® against the base of the door.
Then build a wall on top by vertically overlapping the other energised FloodSax®.