Swell 4x8m 40 Year Guarantee Pond Liner & Free Underlay

These pond liners are made from a flexible 0.35mm-thick HDPE (high density polyethylene) material that, while not quite as thick as rubber pond liners, is similarly durable. It's also UV resistant and, when paired with the standard protective underlay provided, forms a great base for a quality pond.

These garden pond liners are easy to fit. Their HDPE make-up makes them flexible pond liners that are well suited to a performed pond or sculpted garden ponds like Koi ponds. They also create a great seal, keeping pond water where it should be - in your pond!

These heavy duty liners are incredibly durable and built to stand the test of time. In fact, we're so confident in the durability of these fish pond liners, and the HDPE they're made of, that we've given them a 40-year guarantee which covers your pond liner against damage from sunlight. It doesn't cover damage from punctures so it's highly recommended that you lay down your free layer of standard protective underlay prior to installing your pond liner to protect pond liners from sharp stones and, in doing so, reduces the likelihood of leaks. Like the pond liners themselves, this protective underlay is flexible and very easy to fit.

If you're looking for a large pond liner, or a lake liner, then HDPE is the way to go. This material is not only resistant to UV radiation, but a wide range of chemicals too. This, combined with the fact that it's a cheaper material, make it an incredibly popular choice for big ponds.

These quality pond liners come with a free layer of standard protective underlay, but for added piece of mind you may want to pick up some pond sealer, pond liner patches, and/or pond liner repair tape. These products will protect your pond liner against general wear and tear, ensuring that pond water stays in your pond year-round.