---
product_id: 209120538
title: "UWIOFF Pond Liner, 20 Mil HDPE Pond Liners for Outdoor Ponds, 7 x 10 FT | Heavy Duty Fish Koi Pond Liner, Black Pond Tarp for Garden Landscape Stream Fountain Waterfall, UV, Puncture & Tear Resistant"
brand: "uwioff"
price: "$111.87"
currency: USD
in_stock: true
reviews_count: 12
category: "Uwioff"
url: https://www.desertcart.us/products/209120538-uwioff-pond-liner-20-mil-hdpe-pond-liners-for-outdoor
store_origin: US
region: United States of America
---

# Leak-proof HDPE material 20 mil thickness for durability UV resistant for long outdoor life UWIOFF Pond Liner, 20 Mil HDPE Pond Liners for Outdoor Ponds, 7 x 10 FT | Heavy Duty Fish Koi Pond Liner, Black Pond Tarp for Garden Landscape Stream Fountain Waterfall, UV, Puncture & Tear Resistant

**Brand:** uwioff
**Price:** $111.87
**Availability:** ✅ In Stock

## Summary

> 💧 Seal your pond with confidence — durability that flows with your creativity!

## Quick Answers

- **What is this?** UWIOFF Pond Liner, 20 Mil HDPE Pond Liners for Outdoor Ponds, 7 x 10 FT | Heavy Duty Fish Koi Pond Liner, Black Pond Tarp for Garden Landscape Stream Fountain Waterfall, UV, Puncture & Tear Resistant by uwioff
- **How much does it cost?** $111.87 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/209120538-uwioff-pond-liner-20-mil-hdpe-pond-liners-for-outdoor)

## 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

- • **Multi-Use Versatility:** Perfect for ponds, waterfalls, raised garden beds, and self-watering planters
- • **Safe for Aquatic Life:** Non-toxic HDPE ensures a healthy environment for fish and plants
- • **UV & Puncture Resistant:** Built to withstand sun exposure and rough terrain without cracking
- • **Heavy-Duty 20 Mil Thickness:** Engineered for puncture resistance and lasting strength
- • **Flexible & Lightweight Design:** Effortless installation with no tools required, molds to any pond shape

## Overview

The UWIOFF Pond Liner is a 7 x 10 ft, 20 mil thick HDPE liner designed for small outdoor ponds up to 200 gallons. Its ultra-durable, UV and puncture-resistant material ensures over 10 years of leak-proof performance. Lightweight and flexible, it installs easily without tools and is safe for fish and plants. Beyond ponds, it’s ideal for creative garden projects like raised beds and water features, making it a versatile must-have for modern outdoor living.

## Description

desertcart.com : UWIOFF Pond Liner, 20 Mil HDPE Pond Liners for Outdoor Ponds, 7 x 10 FT | Heavy Duty Fish Koi Pond Liner, Black Pond Tarp for Garden Landscape Stream Fountain Waterfall, UV, Puncture & Tear Resistant : Patio, Lawn & Garden

Review: An Unconventional But Perfect Choice - 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.
Review: Works well, will mold and fold fine. Material is sturdy. - 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 🙂

## Features

- Size - 7 x 10 Feet Pond Liner is ideal for small ponds, up to 200 gallons of water; Easy installation, no tools required
- Thickness - Pond liner 20 mil, thick pond liners for outdoor ponds; Ultra-durable yet lightweight, easy to install, while flexible for a variety of creative designs
- Safe Material - Made of good quality HDPE, which is more leak-proof than LDPE liners. Our liner is UV and puncture resistant, can be used for more than 10 years; Safe for your fish and plant
- Easy to Clean - The koi 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 pond easily
- Multifunctional Use - Great outdoor pond liner for any backyard waterfalls, 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

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0886572JW |
| Additional Features | Tear Resistant, UV Resistant |
| Best Sellers Rank | #3,136 in Patio, Lawn & Garden ( See Top 100 in Patio, Lawn & Garden ) #3 in Water Garden & Pond Liners & Seals |
| Brand | UWIOFF |
| Brand Name | UWIOFF |
| Color | Black |
| Customer Reviews | 4.3 out of 5 stars 2,259 Reviews |
| Installation Type | simple |
| Item Dimensions L x W | 120"L x 84"W |
| Manufacturer | UWIOFF |
| Material | High Density Polyethylene (HDPE) |
| Material Type | High Density Polyethylene (HDPE) |
| Pattern | Solid |
| Product Care Instructions | Clean the pond liner regularly, check for and repair any punctures or damage, and maintain a clean pond environment. If necessary, winterize the pond liner for colder climates. |
| Product Dimensions | 120"L x 84"W |
| Product Style | Compact |
| Shape | Rectangular |
| Size | 10' x 7' (Rectangular) |
| Style | Compact |
| UPC | 609832000358 |

## Product Details

- **Brand:** UWIOFF
- **Color:** Black
- **Material:** High Density Polyethylene (HDPE)
- **Product Dimensions:** 120"L x 84"W
- **Size:** 7-Foot by 10-Foot

## Images

![UWIOFF Pond Liner, 20 Mil HDPE Pond Liners for Outdoor Ponds, 7 x 10 FT | Heavy Duty Fish Koi Pond Liner, Black Pond Tarp for Garden Landscape Stream Fountain Waterfall, UV, Puncture & Tear Resistant - Image 1](https://m.media-amazon.com/images/I/613yKb62GnL.jpg)

## Available Options

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

## Questions & Answers

**Q: Did anyone else receive a their pond liner with little pits or pin holes? Does this matter in the liner's ability to retain water?**
A: I didn’t notice a pin hole, but there must be because there is a slow leak I can’t find

**Q: Is this safe for lining raised garden beds for growing food?**
A: That’s exactly what I’m using it for. After so much safety research, I opted to use it. Best rated for food grade is PETE, followed by HDPE.

**Q: It says you can seam multiple liners together. How would you seam them together?**
A: Using pond seam tape. It's double sided and works well.

**Q: Is seaming accomplished using heat gun weld?**
A: It is better to use pond liner seam tape to accomplish seaming.

## Customer Reviews

### ⭐⭐⭐⭐⭐ An Unconventional But Perfect Choice
*by V***Y 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 🙂

### ⭐⭐⭐⭐⭐ Very sturdy
*by J***S on July 5, 2026*

Thick heavy duty. Good quality

## Frequently Bought Together

- UWIOFF Pond Liner, 20 Mil 7 x 10 Feet Pond Liners for Outdoor Ponds, Black LDPE Fish Pond Liner for Small Ponds, Streams Fountains and Garden Waterfall
- Nashua 3 in x 5 yd Aqua-Seal Waterproof Tape in Black
- TotalPond Waterfall Foam Sealant

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*Product available on Desertcart United States of America*
*Store origin: US*
*Last updated: 2026-08-09*