Instantly create a smooth soft padded wall surface barrier between your pool wall and pool liner. The Gorilla Guard closed-cell 1/8-in thick high-density wall foam provides excellent protection between your pool liner and the pool wall. In addition, the wall foam acts as a form of insulation to improve your pool's ability to retain heat, extending the life of your pool and pool liner by providing extra protection from rust, corrosion, and other wall deterioration that may damage your pool or liner. Requires spray adhesive for easy installation. Helps keep your pool liner like-new for years to come! NOTE: Spray Adhesive not included.