Abstract-  For a very long period, cement and concrete have used hydrophobic additives to lessen water penetration. Chemicals called hydrophobic agents are added to cement to increase the angle at which water hits the concrete’s surface. To reduce water penetration into concrete, fatty acids and their fractions have been added to cement as admixtures or phasechange agents. Alkenes, oils, fats, and other greasy materials commonly fall under the category of hydrophobic molecules. The hydrophobic element lengthens the lifespan and aesthetic attractiveness of the concrete by reducing water permeability. Since the middle of the 20th century, water-repellent concrete has become very common in architecture and design. The non-polar, lipophilic, hydrophobic chemicals’ large contact angles reduce the incidence of unfavourable interactions. The investigations on the use of hydrophobic materials in cement mortar and concrete are summarised in this article.