High‑Density Polyethylene (HDPE) is a widely used polymer material that is employed in a variety of applications, especially in industrial and everyday products such as water distribution, waste management, and plastic bags. Because HDPE has a higher density than other types of polyethylene, it is more durable. It resists chemicals, UV light, water, and impacts, and it also offers good mechanical strength and flexibility. HDPE is particularly suitable for water distribution because it prevents degradation caused by microorganisms or chemicals and blocks water passage. It is also commonly used in waste management, as durable, lightweight, and easily spillable plastic bags and containers can be produced for storing and transporting waste materials. HDPE is used in many other applications, including plastic bags, PET bottles, slides, playgrounds, mining, and the oil industry. In conclusion, HDPE is a safe, durable, easy‑to‑process, and inexpensive polymer material that is frequently chosen for the production of various industrial and everyday products. The HDPE membrane, made from high‑density polyethylene, is a geomembrane material that provides impermeability in projects such as regular solid waste storage sites, mine waste storage sites, acid ponds, tank sites, ponds, and irrigation channels. Thanks to the special resin blended with antioxidants and carbon black used in its production, it is manufactured to be resistant to chemical, biological, mechanical effects, and UV.