What is the Swell HDPE Pond Liner 25-Year Guarantee?

This is Swell UK's most popular pond liner. It's designed to be laid over suitable underlay and keep your pond from draining. Liners are made from a variety of different materials but this one is fashioned from 0.35mm-thick UV-resistant HDPE which is very supple, making installation quick and stress-free. This liner is so durable in fact that we sell it with a 25-year guarantee against UV damage.

Why do I need a pond liner?

Pond liners keep the water in your pond from draining into the surrounding earth. A correctly installed pond liner protects your fish and pond as a whole. Unlike other materials that are sometimes used incorrectly as liners, pond liners are UV-resistant and so will retain water for much longer without breaking down and degrading.

Is this pond liner easy to fit?

Yes, although they have no stretch, UV-resistant HDPE pond liners are very supple, making them easy to install in your water garden.

How are pond liners measured?

Pond liners are measured in length and width. However, when deciding on the size of the pond liner you require, it's important to measure the depth of your pond as well as its length and width.

How much pond liner do I need?

If you're unsure what size you need, our Pond Liner Calculator will tell you the size required. Don't forget to use a good quality underlay of similar size beneath your liner to help prevent punctures.

What does the guarantee cover?

This Swell Pond Liner carries a 25-year guarantee, but we also have other variations with 40-year and lifetime guarantees. As with every pond liner sold in the UK, the guarantee covers UV damage only, not punctures, and you'll need to install this over a good quality pond liner underlay to help prevent leaks.