Mortar is a mixture of cement, water, and sand. However, some argue that mortar is a cement-based building material used as an “adhesive” to construct building structures. The difference between mortar and cement is that mortar is essentially ready-to-use cement, whose components generally include cement itself, filler, and various types of suitable additives. Therefore, mortar can also be referred to as ready-to-use instant cement—just add water, mix, and it is ready for use.