The quick and easy solution when there is high water heavy rain or other wet problems hydro snake the water barrier polymer absorbs water oil diesel etc two barriers per set repel deflect or soak up water ideal as an aid on a building site better than a sand sack because they arent so large to store no preparation work required self activating taking up to 20 litres of water ready to use in minutes the barriers can be reactivated after use size 145 x 2 x 20 cm w