How is the swimming pool waterproof? What materials are used?

Hello, K 1 1, polyurethane waterproof coating, JS polymer cement base, can be used for swimming pool waterproof, and the effect is good. Make a waterproof layer in the middle, preferably with waterproof paint, which is convenient and simple to construct and can be brushed in every corner. Building waterproofing is a measure to prevent water from infiltrating into some parts of the building from building materials and structures. Waterproofing is mostly used in roofs, underground buildings, underground parts of buildings, inner rooms and water storage structures that need waterproofing. According to the different measures and means adopted, it can be divided into two categories: material waterproofing and structural waterproofing. I hope my answer can help you, thank you!