10 Best Pond Liners 2025 in the United States

The LifeGuard Pond Liner is made from 45-mil thick EPDM rubber, a material known for its durability and flexibility, making it a solid choice for various water features like ponds, waterfalls, and koi habitats. Being puncture resistant and free from plasticizers, it promises long-lasting performance without cracking or brittleness, which is important for maintaining a secure water barrier. The inclusion of an UnderGuard underlayment adds extra protection against sharp objects below the liner, reducing the risk of damage.

Its size of 20 ft by 25 ft covers a good area suitable for medium to large ponds, and the liner lays flat easily, which helps simplify the installation. This can be a big advantage for users who may not have professional installation help. Additionally, it’s certified fish and wildlife safe, reassuring that it won’t harm aquatic life in your pond.

Although the underlayment arrives in multiple pieces, requiring some extra effort to align properly during installation, and the shipping logistics and weight may require careful handling, this pond liner is a reliable, high-quality option for those wanting a tough, fish-safe liner that can handle various pond types. Its material strength and warranty provide peace of mind for long-term use.

The LifeGuard Pond Liner is made from 45-mil thick EPDM rubber, a material known for its durability and flexibility, making it a strong choice for a variety of water features like ponds, waterfalls, and koi habitats. Its thickness helps resist punctures and wear, which is important for long-lasting protection. Unlike some liners, this one doesn’t use plasticizers that can become brittle over time, so it’s less likely to crack or split in sunlight. EPDM liners generally perform well against sun damage, helping the liner last outdoors. The included UnderGuard Underlayment adds extra protection from sharp objects below the liner, which improves durability.

This liner is certified safe for fish and plants, so it won’t harm aquatic life, making it a good pick for natural ponds or aquaponics. With a size of 15 by 20 feet, it fits medium to larger ponds, but if your pond shape is irregular, the EPDM's pliability helps with custom fitting. It is fairly heavy at 97 pounds due to the material and included underlayment, so installation might require some effort or help.

The LifeGuard Pond Liner provides a reliable, fish-safe, and easy-to-handle option for anyone building or upgrading a pond, while the weight and size should be considered to ensure it suits your specific project requirements.

The Lifeguard 15 ft. x 20 ft. EPDM pond liner is a strong choice for anyone building or upgrading an outdoor pond, waterfall, or water garden. Made from 60-mil thick EPDM rubber, this liner offers professional-grade durability that can handle heavy rocks and wildlife activity without tearing. It’s designed to be very flexible and lays flat easily, making installation smoother even if your pond shape is complex. A big plus is that it doesn’t contain plasticizers, which commonly cause liners to crack over time, so you’re likely to get many years of use without worry. It also comes with a 25-year warranty, showing the manufacturer’s confidence in its lifespan.

Another important factor is its certification as fish and wildlife safe, ensuring it won’t harm your pond’s ecosystem, which is crucial if you keep fish or plants. The size is a good medium, suitable for many backyard ponds, but if you have a larger or unusually shaped pond, you might need to check if it fits well or if seams will be necessary.

This liner effectively balances strength, safety, and ease of use, making it a reliable pick for hobbyists or serious pond builders looking for a long-lasting, fish-friendly liner.