Pondliner Underlay offers exceptionally high performance and provides a highly effective protective barrier between substrate and liner. The material is fabric consisting of non-woven Polypropylene stable fibers which are heat set and needle punched for superior bonding. This extremely versatile underlayment fabric has a very high tensile strength.
We recommend that our Pondliner Underlay is used beneath all our liners, not only to help protect liners from penetration by sharp stones, roots, etc, but also to reduce excessive localized stretching of the liner when ground settlement occurs over time. Resists tears and punctures and features extreme tolerance of Hydrocarbons, seasonal change cycles, mildew, and rot.
In most cases, your liner warranty will require that you use a pond liner underlay.
Read more in our information center on finding and repairing a leak in your water garden koi fish pond liner here!
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