The Liners are made by PVC, reinforced with compressed multilayer nylon mesh with options like Butyl Rubber or EPDM. Liners are prefabricated as one piece bag to fit inside the water tank. These are non-sticky and chemical stabilized. With water inflow, it takes the shape of the tank. These liners are made of food grade, anti-algae and UV stabilized. These are made according to anti-cracking technology and tested upto 600,000 folds before cracking.