A geomembrane sheet is a synthetic membrane made from polymer materials that serve as a barrier to liquids and gases. These sheets are typically used in applications where a waterproof barrier or containment is required. Common materials used to produce geomembrane sheets include polyethylene (HDPE), polypropylene (PP), and polyvinyl chloride (PVC). Geomembranes are engineered to provide an impermeable layer that can prevent the migration of liquids, gases, and other contaminants, thus helping maintain environmental safety and preventing leakage.