There are two main words in the cement's name: water and phobic. Hydrophobic cement is obtained by grinding Portland cement clinker with a film forming substance to reduce the rate of deterioration between Portland cement clinker and oleic acid when stored under unfavorable conditions. The cement of this type is also called hydrographic cement.
Define Hydrophobic Cement
In hydrophobic cement, the cement grains are treated with admixtures that decrease their ability to permeate water. Among the most common hydrophobic admixtures are acidol, naphthene soap, oxidized petrolatum, etc.