An above-ground pool liner is a protective layer installed inside an above-ground pool to create a watertight barrier between the pool’s structure and the water. Typically made from durable vinyl, these liners not only prevent leaks but also enhance the pool’s appearance with various patterns and colors. They come in different types, such as overlap, beaded, and J-hook, each designed for specific installation methods and pool models. In addition to providing a visually appealing finish, above-ground pool liners offer a smooth and comfortable surface for swimmers. Proper maintenance, including regular cleaning and chemical balancing, can help extend the lifespan of a liner, which generally lasts between five to ten years. Overall, an above-ground pool liner is essential for maintaining the pool’s integrity, aesthetics, and user comfort.