We guarantee the liners for 2 years against any manufacturer defects (material, seams, construction) and have done extensive use and freeze/ thaw testing. (Draining your Rain Bench® for winter is still recommended) They are, however, not indestructible and therefore can be torn or punctured with sharp objects. Once inside a Rain Bench® framework, however, they are protected from most dangers as well as sunlight.
We have our own and various installations for others since spring of 2009 and have never needed to replace a liner due to a failed seal. The only time we have heard of a replacement being needed is has been 1, from animal damage.
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