HDPE/EPDM/PVC liners designed to retain water in ponds and reservoirs; fish-safe options.
Geomembrane + geotextile underlay; thickness per project; installation via welding/field seaming.
Aquaculture, reservoirs, rainwater harvesting, ETPs, canal lining.
Project standards (e.g., IS 15351, GRI-GM13 where applicable).