Tanks are these kinds of steel or concrete facilities which are constructed by following specific drinking water regulations and specifications as described by each country’s legislation. Water tanks face different kind of threats and must be well watertight, while being protected from positive and negative pressure. Deterioration can be caused because of chemical attacks, abrasion, changes of temperature or the regular wet and dry cycling. The underground water pressure can develop hairline cracks that can allow underground water and soluble salts to penetrate and create corrosion to the steel reinforcement that can cause structural damages. In addition, if there are water leakages the problem of growth of microorganisms like algae and mold formation and be resistant to highly hydrostatic pressures and to corrosion. ALCHIMICA’s solutions based on polyurethane certified technology protect and secure the safety of water tanks.