The vast majority of flexible pond liners available commercially are manufactured of EPDM (Ethylene Propylene Diene Monomer), HDPE , Butyl Rubber or PVC, with the first two liners being the most popular. A newer method involves a spray-based coating known as polyurea, and though the cost of using polyurea is considerably higher than flexible sheets, the lifespan of the material may be much longer than any other.
Lifespan of EPDM pond liner: Up to 20-25 years and can be used in northern climates.
Lifespan of Butyl Rubber: Up to 20-25 years.
Lifespan of HDPE liners: Up to 15 years but they are not recommended for use in northern climates.
Lifespan of PVC liners: Up to 10 years.
The picture shows EDPM pond liner in 5', 10' and 20' wide rolls. (1.5 , 3 and 6 m)