Epdm pond liners have high expansion & contraction characteristics that enable it to conform to objects below the pond. Should earth movement occur, such as settling, epdms high elongation will enable it to stretch. Epdm pond liners flexibility provides more versatility in the pond design. Unlike preformed liners, it can be easily shaped to fit the unique contours of the pond dimensions, allowing a more unique design. Epdm pond liners stay flexible in temperatures from -40 Fahrenheit to 175 Fahrenheit making it easy to install year round. Unlike other liner materials, EPDM pond liners do not contain plasticizers that could make it become brittle with age & cause cracks or splits in the material, threatening aquatic life. Epdm pond liners requires little or no regular maintenance once installed. Remarkable resistance to the harmful effects of Ultraviolet radiation (UV), ozone & other environmental conditions. $5 cut & box fee included in price!