The wastewater industry is the largest overall industry current using polyurea tank linings. This is because they are able to withstand the majority of chemical and biological gases that wastewater treatment plants produce. Additionally, anti-microbial additives may be added to the polyurea to stop the growth of microbes on the liner. The most important thing is that polyurea coatings create a unidirectional membrane. This means they can be molded into pumps, poles, or other inner structures. Large-diameter pipes, as well as manholes and lift stations, are ideal models for polyurea. Polyurea can be found in hard-structured formulations to strengthen pipes and manholes. Because they are sprayed on linings, they conform precisely they create the ideal structural coating.