Introduction Geomembrane sheets are widely used in Pakistan for waterproofing, waste containment, and environmental protection. These synthetic liners, typically made from HDPE (High-Density Polyethylene), LDPE (Low-Density Polyethylene), PVC (Polyvinyl Chloride), or LLDPE (Linear Low-Density Polyethylene), prevent water seepage and protect structures from moisture damage. Whether used in fish...