Firestone 45mil EPDM Liner 10-ft.x 10-ft. Boxed Firestone PondGuard liners are the best EPDM liners on the market! EPDM liners are the preferred choice for landscapers, nurseries and water garden installers because they are extremely flexible and very puncture resistant.Fish friendly EPDM liners have been tested and have proven to be safe with fish and plantsHighly flexible EPDM liners remain flexible in extreme temperatures, from -46 to 175 degrees F.Weather resistant EPDM liners are UV resistant and will not crack with age20 year warranty – all Firestone liners are so durable they are under warranty for twenty years! Category: Liner and Underlayment Tags: 45mil, epdm, firestone, liner