Construction elements, especially cementitious-based materials like concrete are inherently permeable, porous, and hydrophilic in nature. The admission of external water in cement-based materials allows various deterioration processes to start and continue within its microstructure causing cracks and corrosion in embedded steel which eventually have a detrimental effect on the life of the structure. The use of waterproofing chemicals is one way to restrict the entry of external water into the cement microstructure. With this comes new opportunities in the chemical additives industry, one such opportunity is in the hydrophobic chemical treatment of concrete. In this study, silane-based hydrophobic agents were studied by two different application processes: integral addition and surface impregnation. Their effect on transport properties such as capillary absorption and permeable pore volume was evaluated before and after the carbonation process. It has been observed in this study that silane-based hydrophobic chemicals work quite well with LC3 and has been found to drastically reduce permeable pore volume in case of surface impregnation and a significant decrease in permeable pore volume along with an additional decrease in capillary sorption with integral addition of chemical. Results obtained indicate the potential of these chemicals in hindering water ingress and thus signifying their usefulness in areas where there is a risk of reinforcement corrosion and ingress of aggressive species through water transport.