---
product_id: 532133792
title: "15 x 20 FT Pond Liner, 20 mil Pond Liners for Outdoor Ponds, UV Resistant Fish Pond HDPE Liner for Backyard Koi Ponds, Pool, Water Features, Fountains, Waterfall and Water Gardens, Black"
brand: "uwioff"
price: "€ 187.66"
currency: EUR
in_stock: true
reviews_count: 5
url: https://www.desertcart.es/products/532133792-15-x-20-ft-pond-liner-20-mil-pond-liners
store_origin: ES
region: Spain
---

# Leak-proof & waterproof seal UV resistant for long outdoor life 20 mil ultra-thick HDPE durability 15 x 20 FT Pond Liner, 20 mil Pond Liners for Outdoor Ponds, UV Resistant Fish Pond HDPE Liner for Backyard Koi Ponds, Pool, Water Features, Fountains, Waterfall and Water Gardens, Black

**Brand:** uwioff
**Price:** € 187.66
**Availability:** ✅ In Stock

## Summary

> 💧 Elevate your outdoor oasis with the ultimate pond liner—durability meets effortless style!

## Quick Answers

- **What is this?** 15 x 20 FT Pond Liner, 20 mil Pond Liners for Outdoor Ponds, UV Resistant Fish Pond HDPE Liner for Backyard Koi Ponds, Pool, Water Features, Fountains, Waterfall and Water Gardens, Black by uwioff
- **How much does it cost?** € 187.66 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.es](https://www.desertcart.es/products/532133792-15-x-20-ft-pond-liner-20-mil-pond-liners)

## Best For

- uwioff enthusiasts

## Why This Product

- Trusted uwioff brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Effortless Maintenance:** Smooth surface reduces soil buildup and prevents contamination, making pond cleaning a breeze.
- • **Sunproof & Stress-Free:** UV resistant material protects your pond liner from sun damage, keeping your water feature pristine season after season.
- • **Fish & Plant Safe, Always:** Non-toxic, leak-proof liner safeguards your aquatic life and plants, creating a healthy ecosystem in your backyard.
- • **Versatile Backyard Essential:** Perfect for koi ponds, waterfalls, fountains, raised garden beds, and innovative self-watering projects.
- • **Built to Last, Designed to Impress:** 20 mil thick HDPE ensures unmatched durability and puncture resistance for years of worry-free use.

## Overview

This 15 x 20 ft, 20 mil thick HDPE pond liner offers superior UV resistance, puncture protection, and leak-proof performance. Designed for outdoor ponds, koi habitats, and water features, it ensures a safe, clean environment for fish and plants while simplifying maintenance. Lightweight yet ultra-durable, it’s a versatile solution for enhancing any backyard water project.

## Description

Full description not available

## Features

- 20 mil Thick HDPE - Pond liner 20 mil, thick pond liners for outdoor ponds; Ultra-durable yet lightweight, 15 x 20ft large size is easy cutting and to install
- Safe Material - Made of good quality HDPE, which is more leak-proof than LDPE liners. Our pond liners for outdoor ponds are UV and puncture resistant, waterproof and leak proof, can be used in outdoor ponds for many years; Safe for your fish and plant
- Easy to Clean - This fish pond liner provides a flat surface for your pond, reducing the soil accumulation. Also can effectively prevent harmful substances in the soil from penetrating into the pond to pollute the water, so that you can clean the pond easily
- Multifunctional Use - Great backyard pond liner for any waterfalls, outdoors ponds, fish/koi ponds, and other water features; Can be used in different ways: Utilize the liner for raised garden beds, sub-irrigation planters, and other self-watering projects
- 100% QUALITY SERVICE - Each product of UWIOFF has been strictly screened and is seriously responsible for every customer. We offer 7 days, 24 hours worry-free customer support service.

## Images

![15 x 20 FT Pond Liner, 20 mil Pond Liners for Outdoor Ponds, UV Resistant Fish Pond HDPE Liner for Backyard Koi Ponds, Pool, Water Features, Fountains, Waterfall and Water Gardens, Black - Image 1](https://m.media-amazon.com/images/I/613yKb62GnL.jpg)

## Available Options

This product comes in different **Size** options.

## Customer Reviews

### ⭐⭐⭐⭐⭐ An Unconventional But Perfect Choice
*by R***T on September 24, 2025*

As a home gardener who has experimented with a lot of different methods, I've found that sometimes the best tool for the job isn't the one it was originally designed for. That's the case with the UWIOFF 10 x 13 FT Pond Liner. While it's marketed for ponds, it turned out to be the perfect material for building a large self-watering garden bed.My project required a liner that was durable, completely waterproof, and manageable to install in a confined space. The 20 Mil thickness of this liner was the key. It was thick enough that I wasn't worried about it getting punctured by tools or rocks, but still flexible enough to be folded and molded into the shape of the raised bed without a lot of struggle. I was able to get clean corners and edges, ensuring a tight seal for the water reservoir at the bottom of the bed.The generous 10 x 13-foot size gave me plenty of material to work with, allowing for a good overlap and a comfortable margin of error. The liner has held up perfectly. It contains the water effectively, and after an entire growing season, there are no leaks or signs of wear. The black color also helps absorb a little bit of heat, which is a bonus in my cooler climate.For anyone looking to create a large-scale self-watering system for their garden—whether it's a sub-irrigated planter or a wicking bed—I can't recommend this product enough. It's a reliable, heavy-duty solution that delivers on its promise of being completely waterproof and durable. Don't be afraid to think outside the box; this pond liner is a fantastic choice for your next garden project.

### ⭐⭐⭐⭐⭐ Works well, will mold and fold fine. Material is sturdy.
*by A***A on March 9, 2025*

First things first, the material is thin but strong, it isn't rubber so it won't mold immediately and there will be creases as it gets laid in, however, once inside, we found that adding river pebbles of varying size and weight, helped hold the material down. Then we started filing it with water, which helps the material mold itself and further sink into the soil.This is southern Florida, so the soil here is rocky and has natural lime stone, the lime stone we couldn't dig out we covered with moist soil and mud, we did this before we laid the material in. With the weight of pebbles and water, it began to mold almost immediately.Also, we did this around 7pm, sun setting afternoon, by mid-day, the heat from the sun will further aid the material to molding around the opening.The remaining material I'd recommend one not to cut, we placed decorative concrete stones around it and over the excess, used soil from the hole to fill in around and over material and then mulched it to further hold it down. What you see in photo is this.Again, it isn't soft rubber but it's pretty good for a small pond which is about 7 ft long and 5.5 wide. At its deepest it's about 2.5 ft, at its most shallow about 10 inches.I'd recommend the material, the size is more than adequate for the laguna we had in mind. We should have put another layer on top of it, but it's strong as is, we've walked around inside it and it feels sturdy at 20 mil.Comes folded up tightly. Didn't notice any tears or holes in fabric. It's been holding water for hours without issue. So far, very good. Price point couldn't be beat and the reviews are pretty good. Will update with more photos when it's finished.👍Update photos as pond/laguna takes shape. Liner is still holding up without issue.Liner is folded beneath stones, as you can see the stones are heavy (over 40 pounds each) and some are stacked. We did this to make sure the material stays in place, doesn't shift towards submerged center. Also, has some security for wildlife currently in pond (fish and turtles).Inside liner is holding about 100 pounds of river pebbles. Hand chosen so as not to tear or poke liner. I recommend using smooth stones and rocks.For the curious: the submerged plant is Egyptian papyrus, other plants are Water Hyacinth (native to Florida) and wild grass orchids 🙂

### ⭐⭐⭐⭐⭐ Heavy quality
*by H***. on September 24, 2025*

Good heavy duty quality. I used it to cover the leaky roof window on my car. Works great.

## Frequently Bought Together

- UWIOFF 15 x 20 FT Pond Liner, 20 mil Pond Liners for Outdoor Ponds, UV Resistant Fish Pond HDPE Liner for Backyard Koi Ponds, Pool, Water Features, Fountains, Waterfall and Water Gardens, Black
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*Product available on Desertcart Spain*
*Store origin: ES*
*Last updated: 2026-02-04*