Water tanks may seem like simple systems; nothing more than gigantic water bottles that should easily contain large volumes of water or other liquids for as long as they need to be stored. The truth, however, is more complicated. As they say, “the bigger they are, the harder they fall,” and the same is true for water tanks. Most industrial water tanks are designed to hold very large volumes of water, which can exceed one hundred thousand gallons. This means that not only is there enormous stress placed on water tanks by virtue of the incredible quantities of water within, but that there are many more opportunities for material failure, which pose potentially catastrophic consequences. Cracks, leaks, UV degradation, or other types of damage or deterioration risk letting water out, and contaminants in. In either case, water stored in compromised water tanks may be rendered unsafe, or otherwise unsuitable for industrial or commercial use. Perhaps worse still, in the event of primary containment failure, the sudden release of large volumes of water can pose life-threatening risks to on-site personnel, as well as to surrounding infrastructure, communities, and wildlife. To protect water tanks from spills and contamination, polyurea water tank coatings offer the perfect solution.