---
product_id: 20371743
title: "Firestone PondGard 45 Mil 20 x 25-Feet EPDM Pond Liner"
brand: "firestone"
price: "$3436.02"
currency: USD
in_stock: true
reviews_count: 8
category: "Firestone"
url: https://www.desertcart.us/products/20371743-firestone-pondgard-45-mil-20-x-25-feet-epdm-pond
store_origin: US
region: United States of America
---

# 75-year life expectancy ensures long-term reliability Fish-safe and eco-friendly for sustainable ponds 45 mil EPDM thickness for ultimate durability Firestone PondGard 45 Mil 20 x 25-Feet EPDM Pond Liner

**Brand:** firestone
**Price:** $3436.02
**Availability:** ✅ In Stock

## Summary

> 🐠 Build your dream pond with confidence — durability that outlasts trends!

## Quick Answers

- **What is this?** Firestone PondGard 45 Mil 20 x 25-Feet EPDM Pond Liner by firestone
- **How much does it cost?** $3436.02 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/20371743-firestone-pondgard-45-mil-20-x-25-feet-epdm-pond)

## Best For

- firestone enthusiasts

## Why This Product

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

## Key Features

- • **Eco-Conscious Design:** Safe for fish and plants, supporting a thriving aquatic ecosystem.
- • **Unmatched Durability:** 45 mil EPDM thickness resists tears and punctures, built to last decades.
- • **Effortless Installation:** Pliable yet tough liner that adapts to your pond’s unique shape with ease.
- • **Warranty-Backed Confidence:** 20-year limited manufacturer’s warranty for worry-free pond building.
- • **Contractor-Approved Quality:** Preferred by pros and landscapers who demand premium performance.

## Overview

The PondGard 45 Mil 20 x 25-Feet EPDM Pond Liner by Firestone offers a premium, tear-resistant 45 mil EPDM material with a 75-year life expectancy and a 20-year limited warranty. Engineered for durability and environmental safety, it’s fish and plant safe, making it the top choice for professionals and enthusiasts seeking a reliable, long-lasting pond foundation.

## Description

45 Mil EPDM Fish Safe Liner with a 20 Year Limited Manufacturers Warranty. This Top Grade Tear and Puncture Resistant 45 mil EPDM liner is perfect for adding a stream or for lining your waterfall. Never settle for PVC or anything less than 45 mil EPDM PondGard Liner. Pondliner is the foundation of every great pond and specially formulated for water gardens. Don't settle for anything but the best. Firestone Pondgard pond liner is fish safe, strong and durable yet pliable and will last you for many, many years. EPDM 45 mil is the #1 choice for contractors, landscapers and consumers that demand only the best.

Review: Dependable. - I purchased the 50 Mil approximately 8 years ago Firestone is the best choice for worried free issue Never leaked /tough and last for years . No matter the weather . Full sun . I am more worried about my concrete pool leaking ‘ then my koi pond . If building a pond and you want worry free from leaks . Buy Firestone .
Review: Best Pond Liner - Great Quality - I bought this liner for my property to make a small retention pond mainly for wildlife and watering a remote food plot/garden. First, it was exactly what the description said. Made in USA, EPDM, and the exact specs as far as measurement and thickness. You can try other liners like I have many times from big box stores or whatever that state their EPDM and UV resistant and so on, but this liner honestly puts them to shame. I installed it per their guidelines with the bio-barrier underlayment and haven't had any problems. I even had 2 relatively large limbs break off of a cottonwood next to the pond and drop directly on the liner. I was worried about a puncture because the water is only 2ft deep at most where the limb impacted. Not even a scratch on the liner. Only word of advice is pay attention to description. Some larger sized liners and shipped in two pieces due to the weight. You'll have to seal a seam. As long as you do and use what they recommend, this stuff is pretty durable and forgiving to work with, just make sure you put in the work on smooth soil, and don't skip the underlayment (lose warranty if you don't use). Great quality and made in USA.

## Features

- 20 Year Limited Manufacturers Warranty
- 45 Mil (1.14 mm) (0.045") EPDM
- 75 Year Life Expectancy
- Environmentally friendly
- SAFE for fish and plant life

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0012SM2QE |
| Best Sellers Rank | #424,213 in Patio, Lawn & Garden ( See Top 100 in Patio, Lawn & Garden ) #243 in Water Garden & Pond Liners & Seals |
| Customer Reviews | 4.7 4.7 out of 5 stars (309) |
| Is Discontinued By Manufacturer | No |
| Item Weight | 150 pounds |
| Item model number | FSPG20X25-45 |
| Manufacturer | Firestone |

## Images

![Firestone PondGard 45 Mil 20 x 25-Feet EPDM Pond Liner - Image 1](https://m.media-amazon.com/images/I/61HbZQkkSWL.jpg)

## Questions & Answers

**Q: is this the same material used on roofs?**
A: It is very similar to the Firestone roofing material although the manufacturing process for their Pondgard material uses fish safe chemicals rather than the hazardous (mildew and fungus resistant) chemicals used in roofing liner. Never use roofing liner for your pond - it will poison your fish.

**Q: I need a liner to fit 6 x 12 x 4 pond**
A: Building a 4 foot deep pond that small is very unusual and will be very difficult to do as well as being difficult to maintain. However, to answer your question you will need a 20x25 liner to allow for at least 2.5 foot overhang on all sides which should be anchored in a trench and covered with rock or soil in order to hold the liner of that deep water pond in place.

**Q: Do you offer a 30’ x 20’ with the underlayment? And if so, what is the cost?**
A: Graystone Industries offers the 20x30 liner and underlayment. The price would depend upon your region due to expensive freight costs for this 190 lb shipment. Please review listing under title - Firestone 20 X 30 45mil EPDM Pond Liner & Matching Underlayment Kit Black…

**Q: I have a pond that is 12 feet in length, 10 feet in width and 4 feet at its deepest length. What size do you recommend?**
A: In order to allow the recommended 2' overlap all the way around the pond, I suggest a 25' x 25'.  If you go with a 20' x 25' you will only have 1' on one side.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Dependable.
*by S***. on December 14, 2025*

I purchased the 50 Mil approximately 8 years ago Firestone is the best choice for worried free issue Never leaked /tough and last for years . No matter the weather . Full sun . I am more worried about my concrete pool leaking ‘ then my koi pond . If building a pond and you want worry free from leaks . Buy Firestone .

### ⭐⭐⭐⭐⭐ Best Pond Liner - Great Quality
*by A***R on April 19, 2022*

I bought this liner for my property to make a small retention pond mainly for wildlife and watering a remote food plot/garden. First, it was exactly what the description said. Made in USA, EPDM, and the exact specs as far as measurement and thickness. You can try other liners like I have many times from big box stores or whatever that state their EPDM and UV resistant and so on, but this liner honestly puts them to shame. I installed it per their guidelines with the bio-barrier underlayment and haven't had any problems. I even had 2 relatively large limbs break off of a cottonwood next to the pond and drop directly on the liner. I was worried about a puncture because the water is only 2ft deep at most where the limb impacted. Not even a scratch on the liner. Only word of advice is pay attention to description. Some larger sized liners and shipped in two pieces due to the weight. You'll have to seal a seam. As long as you do and use what they recommend, this stuff is pretty durable and forgiving to work with, just make sure you put in the work on smooth soil, and don't skip the underlayment (lose warranty if you don't use). Great quality and made in USA.

### ⭐⭐⭐⭐⭐ Great liner!
*by C***R on April 14, 2024*

Going strong after 4 years with zero issues. It should be good for 20. We'll see! So far I'd recommend it and would buy again.

## Frequently Bought Together

- Firestone PondGard 45 Mil 20 x 25-Feet EPDM Pond Liner
- UNDERGUARD Nonwoven Geotextile Underlayment - 20 ft. x 25 ft. - UG20X25
- Tite Seal PLST325 Self Adhesive Double Sided Butyl Pond Seam Tape, 3" by 25'

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*Product available on Desertcart United States of America*
*Store origin: US*
*Last updated: 2026-03-10*