What Does EPDM Stand for in Pond Liners?

There are quite a few different types of pond liners on the market today. From pre-formed pond liners all the way to concrete for large expansive koi ponds. The most popular is the flexible EPDM rubber pond liner.

If this confuses you and makes you wonder what makes EPDM stands for in pond liners, let me explain.

EPDM stands for Ethylene Propylene Diene Monomer. This is exactly why they decided to abbreviate it. Imagine ordering up pond liner and saying I would like to buy Ethylene Propylene Diene Monomer flexible rubber pond liner, please.. haha.

What does this mean to you, and why would you want to use it

Just like a house, a pond liner is your pond’s foundation. It is essential. Just like you would not build your house on top of the sand, you should not use a cheap pond liner.

Installing a cheap pond liner will lead to multiple service calls, a leaky pond, and quite possibly a massive amount of labor to fix and replace.

Using a quality EPDM pond liner will give you that good foundation and let you sleep at night, knowing your pond will hold water for many, many years. EPDM liners have been tested, and when exposed to sunlight, they will only degrade 1/2 a mil a year. This would give you a life span of about 90 years after installation! On top of that, we cover the pond liner in most installations so you could get even more life out of it.

Warranty – We wouldn’t even consider using a pond liner if it does not come with a warranty. And we suggest you shouldn’t either. Most EPDM liners come with a 20-30 year warranty.

It is becoming more popular for homeowners to look at their landscaping and see it as a canvas for expanding their living space. Even landscape architects will say an outdoor space that improves leisure time and adds value to homes. They will also say that water features such as ponds are one of their top requested designs.

Thousands of water features get installed every year, all using pond liners, including:

  • Waterfalls
  • Water gardens
  • Stream
  • Reflection pond
  • Pondless water features
  • Natural styled ponds
  • Koi ponds
  • Hardscapes
  • Fountains
  • Decorative ponds
  • Rainwater harvesting

Why is EPDM Pond Liner so Widely Used?

EPDM pond liners are widely used because they are flexible liners and can be easily used by professional landscape contractors or DIY pond builders. Aside from enhancing the value of your home and giving you more time to relax, the Firestone pond liner is easy to install, durable and allows you flexibility in your water feature design.

Benefits and Features of EPDM Pond Liner


EPDM pond liner is built to hold up to ozone, UV exposure, frost, snow, and extremely hot or cold temperatures. It doesn’t contain migrating plasticizers to protect against splitting, cracking, and microbial attacks caused by algae growth.

Most of the EPDM pond liner suppliers will offer you up to a 20-year warranty so that you can be sure if you build your water feature with this type of pond liner after twenty years of use, it will function as well as it did on day one.

Environmentally Friendly

It can provide excellent support to plant life and also aquatic life.

Easy to Maintain

This type of pond liner is basically maintenance-free. If you have to get a liner puncture, you can repair the liner while leaving it in place with a pond liner patch kit. Getting your water feature back up and running quickly and easily.


you can use a flexible pond liner in all contours and shapes of water features.

Simple to Install

The invention of the tape system allows you to take panels of liner in any size, length, or widths and seamed together with no special tools needed for installation or utilities.


Pro pond contractors and landscape architects demand using an EPDM pond liner. Due to being easy to install, flexible to custom shapes, and building natural-looking water features.


Homeowners and pro pond builders love the beauty EPDM pond liner brings to their projects.

Don’t settle for a low-quality pond liner for your water feature. Look for quality EPDM pond liner suppliers to make sure you’re getting the best. By doing so, you will be able to avoid pond water leaks for many years.

Two of the Most Popular EPDM Rubber Pond Liners on the Market

If you have decided to go with EPDM as your pond liner of choice, the two major players in the game are Firestone and now EasyPro.

firestone pond liner
firestone pond liner


Firestone has been in the game the longest and is the biggest pond liner company out there with its high-quality EPDM pond liner. But, rising costs have caused some pond owners to look for alternatives.

EasyPro Pond Liner
EasyPro Pond Liner

The newest pond liner currently on the market is EasyPro Integra 30 mil EPDM pond liner. It is a more lightweight fish-safe liner, cheaper than the 45 mil pond liner by Firestone but not as heavy duty. If you have a lightweight project and your budget is tight, Integra liner by EasyPro is the way to go.

TOXIC EPDM Pond Liners

Now that you know what EDPM stands for in pond liners, you may start searching the internet. One thing you may notice is that roofing liner is also made out of Ethylene Propylene Diene Monomer (EPDM) and is cheaper than what you find at online pond websites.

Now at first, you may be thinking you found the holy grail and cheaper pond liner. But, it could lead to problems.

While some pond owners have used roofing liners for their projects, we have also heard of owners coming home to a pond full of dead fish built without a “fish safe” EPDM liner. Roofing liners can be made with mold-resistant chemicals or others, and it’s not worth the risk of killing your fish for the small amount saved.