 Hydrophobic concrete is also used in applications that are exposed to rain or rain puddling, such as green roofs, other kinds of roofs, parking structures, and plazas.Amongst the many benefits of using hydrophobic concrete, it reduces installation time and lowers costs.Use of hydrophobic concrete can reduce the labor time of industrial project because normal concrete involves a corrosion proofing period as well as a waterproofing period.