45-Mil EPDM Rubber Pond liner with UnderGuard Underlayment has a Limited Lifetime Warranty Durable, puncture resistant, extremely versatile for use in waterfall features, pond kits, water gardens, retention basins, koi ponds, aquaponics, lakes, stream liners, and fish hatcheries. Does not contain plasticizers, which become brittle and cause cracks or splits. Easy to install, lays flat, very pliable for easy shaping and feature fitments. Geotextile will come in multiple pieces equivalent to total square footage. Certified Fish & Wildlife Safe by Guardian Systems Inc 45-Mil EPDM LifeGuard Pond Liner and UnderGuard Underlayment ComboWhen choosing the pond liner for your water feature project, remember that it is the foundation for your Koi Pond, Water Garden, or Waterfall. From residential backyard ponds to commercial water features, Anjon Manufacturing's EPDM LifeGuard Pond Liner is the quality choice of installers and water feature owners and has been tested and is certified to be fish and wildlife safe by Guardian Systems, Inc! LifeGuard Pond Liner is is simply the best pond liner that is available on the market today, very pliable, and easy to work with, while fitting into your pond and connecting to your features components. EPDM rubber liner readily accepts pipe and hose penetrations without leaks and is easily seamed. The warranty for Anjon Manufacturing's 45-Mil EPDM LifeGuard Pond Liner is unsurpassed in today's market! LifeGuard Pond Liner comes with a standard 25-Year Manufacturer Warranty that's applied when installed without UnderGuard Underlayment Nonwoven Geotextile. LifeGuard Pond Liner is warrantied for life when installed with UnderGuard Underlayment Nonwoven Geotextile! *This listing includes UnderGuard Underlayment Nonwoven Geotextile.