Internal waterproofing of Water Tank A water tank is a container for storing water. Water tanks are used to provide storage of water for use in many applications, drinking water, irrigation agriculture, fire suppression, agricultural farming, both for plants and livestock, chemical manufacturing, food preparation as well as many other uses. It is necessary to clean and disinfect your water holding tank(s) at least once a year or more often, if required. This is to remove algae (plant growth which produces bad tastes and odours), silt, and bacteria which may be harmful. Empty the tank. There are two ways you can waterproof your water tank: The conventional way is the application of cement slurry that will stop the leakage for the time being. It's only a temporary solution to waterproof the tank which is done to arrest the leakage from cracks & joints. At times, seepage and leakage from overhead and underground tanks spoil the décor. This, in turn, helps the growth of algae and fungus, which leads to weakening of the structure. For this reason, such areas should be made waterproof as well as safe for potable water. concrete tanks are usually large in volume, some of which have been around for many years. Many concrete tanks leaking water require urgent repair. These have been neglected over the years and as a consequence, structural issues have resulted in cracking and leaking. Concrete Water Tank Design goes a long way to increase the longevity of concrete tanks