White Portland cement is similar to ordinary, gray Portland cement in all respects except for its high degree of whiteness. Obtaining this color requires substantial modification to the method of manufacture; it is the metal oxides (primarily iron and manganese) that influence the whiteness and undertone of the material. And because of this, it is somewhat more expensive than the gray product.
The different sub products of white cement are:
Normal (Type I), water repellent, high early strength (Type III), high sulphate resistant (Type 5) and masonry cement (Type N and Type S).
ASEC Trading supplies white cement with minimum 80% whiteness.
White Portland cement is used in combination with white aggregates to produce white concrete for prestige construction projects and decorative work. White concrete usually takes the form of pre-cast cladding panels, since it is not economical to use white cement for structural purposes. White Portland cement is also used in combination with inorganic pigments to produce brightly colored concretes and mortars.