5 Best Pond Liners of 2026

Having to buy underlay at the same time as pond liner can push up the cost of doing the pond; however, the PondHero Pond Liner comes with free underlay included making it good value for money.

This particular liner comes as a 2.5 x 2.5 m piece, which is suitable for small ponds and easy to cut to size using standard scissors. There are 59 sizes available from PondHero in total, varying in price but always offering free underlay, so it can be bought to suit any pond.

It’s made from low density polyethylene with a UV-resistant coating on both sides. It’s therefore flexible and lightweight and shouldn’t degrade in sunlight. When being positioned over a dug pond, there may be some creasing, but this can be improved by gently pulling on the liner whilst filling the hole with water.

Due to the fact that this is a budget item, a little extra work needs to be put in to make it as effective as some other liners. Primarily, before putting down the underlay, the area should be well cleared of any roots, stones etc. and putting down a layer of sand first may help improve the longevity.

This is all because the pond liner isn’t particularly thick, and therefore additional steps are required to make sure that it doesn’t split.

However, overall, this is one of the best pond liners in terms of value for money. It may not be as thick as some other brands, but as long as it is treated carefully, it works well to create a pond. The inclusion of free underlay also helps protect the liner from getting damaged.

Thick pond liner can be expensive, but this All Pond Solutions Pond Liner finds a good middle ground between thickness and value.

It’s made from low-density polyethylene with a thickness of 0.3 mm and is therefore very reasonably priced for its size of 5 x 4 m. Per metre squared, it’s one of the cheapest liners featured here.

Cutting it to size can be done easily with scissors, but there are also several other size options available if this is too big or small. There’s no underlay included, so that needs to be bought separately, but it’s still a good price for the size and thickness.

When fresh out the packet, this liner can feel a little stiff, but it will loosen up if left to warm in the sun for a while. This makes it more malleable and easier to shape around the pond. Depending on how curved your pond is, it may be necessary to ‘pleat’ this liner into the corners, instead of expecting it to fit smoothly. It’s also a good choice for making water features out of barrels.

Overall, it’s one of the best pond liners at this price point, but shouldn’t be expected to perform as well as thicker, more durable (and expensive) liners. However, for basic ponds and water features, it offers a good waterproof layer that’s sufficiently easy to work with.

Given how thick this Certikin International Ltd PVC Pond Liner is, it’s not only useful for ponds, but a variety of other uses too.

The thickness is 0.5 mm which is considered relatively heavy duty when it comes to pond liners. As well as being used to create a waterproof base for a new pond, sheets like this be used to cover shed roofs, or to line wooden planter boxes.

Whilst some thinner pond liners can be prone to tearing (especially if used without underlay), this PVC liner is a lot less likely to rip or puncture. It’s durable enough to stop plants from piercing their way through, and can be used for ponds up to 50 cm deep.

Despite being relatively thick, the 2 x 3 m liner is still flexible enough to be moulded into the shape of the pond, made even easier to fit if it is warmed in the sun slightly first. Even so, the material is easier to handle with two people due to its 3.54 kg weight.

Unlike some liners of this size, this is one continuous sheet which makes it less prone to leaks and generally more resilient; large liners are sometimes made of several pieces connected together.

Really, the only thing possibly working as a negative for this liner is its weight; but really this goes hand in hand with its thickness, so it’s hard to get one without the other.

With a name like ‘Flexiliner’ there’s no prize for guessing what the main properties of this 4x3m Pond Liner With Free Underlay will be.

Made from low-density polyethylene, coated with a UV- and rot-resistant laminate, it’s much thinner than standard PVC liners and moulds better around ponds of any shape.

It’s therefore one of the best pond liners for ponds with a lot of curves, and it doesn’t permanently crease in a way that makes it hard to fold. Whilst some pond liners are ‘crackly’, this ‘Flexiliner’ is flexible enough to be folded around corners where necessary, without the folded edges looking brittle.

Despite its relatively thin construction, it’s not easily punctured, and the included underlay adds another layer of protection.

However, given that the free underlay is relatively thin, it may be necessary to put a layer of sand down first, in order to limit contact with stones or roots.

In terms of value for money, this liner is pretty reasonably priced considering there’s no need to buy underlay separately. It’s therefore a good option to go for if you want something that’s quite easy to mould.

Whilst most pond liners are black, this Polyex 8x5m Pond Liner is reversible, giving a choice of a brown side as well as a black one.

The colour you choose depends entirely on personal preference as both sides otherwise offer the same properties. Some people consider brown to look less harsh and more natural than black liner.

Compared to other pond liners featured on this page, this Polyex option is a lot larger at 8 x 5 m, but it can be cut to size. Buying such a large amount makes it great value per metre squared, although there isn’t any underlay included.

As with all good pond liners, it has been coated with a rot-resistant coating and is also UV stabilised. However, despite these properties it’s still easy to smooth and contour around oddly-shaped ponds without creasing.

Overall, this is one of the best pond liners for large ponds given how big the sheet is, but it’s also a great option for anyone who might like a more natural colour scheme for the pond. Having a reversible sheet makes it possible to see what either colour looks like, before settling on a final decision.