Plaster is the oldest and most common pool surface finish. It is a simple mixture of water, Portland cement, and either marble dust or silica sand.
Traditional white plaster (or marcite) gives pools a smooth, classic appearance and remains a popular choice despite the range of pool finishes that have emerged over the years. White plaster is the most inexpensive pool finish option and typically lasts five to seven years before any signs of etching or chipping appear.