BestNest Firestone PondGard EPDM Pond Liner, 20' x 22.5', 45 mil | Flexible Rubber Liner for Fish Ponds, Waterfalls & Water Gardens | Fish & Plant Safe, Puncture-Resistant, UV-Stable EPDM Membrane

Build a beautiful, long-lasting water feature with the BestNest Firestone PondGard EPDM Pond Liner, 20' x 22.5', 45 mil. This professional-grade liner is the industry standard for decorative ponds and water gardens, offering unmatched flexibility, durability, and environmental safety. Crafted from ethylene propylene diene monomer (EPDM) synthetic rubber, the PondGard liner provides a highly stable and waterproof membrane that easily conforms to the shape of your pond. Whether you’re designing a compact backyard water feature or a sprawling koi pond, this flexible liner adjusts to every contour with ease—even in cold temperatures. The 45 mil thickness provides exceptional puncture resistance and tensile strength, protecting against roots, stones, and other sharp debris that could compromise your pond’s integrity. Its black color not only delivers a natural, elegant aesthetic but also enhances the illusion of depth while offering additional UV protection against sunlight exposure. Engineered for long-term reliability, PondGard resists UV radiation, ozone, and microbial attacks, maintaining its elasticity and watertight seal through years of exposure. Once installed, it requires little to no maintenance, providing peace of mind and long-term performance for both professional landscapers and DIY pond builders. PondGard’s composition has been rigorously tested and approved by both the Environmental Protection Agency (EPA) and the American Society for Testing and Materials (ASTM) to ensure it is safe for fish, aquatic plants, and other pond life. You can confidently build a thriving ecosystem without worrying about harmful chemicals or leaching. Ideal for a wide range of applications—including koi ponds, garden waterfalls, streams, fountains, and backyard water features—the PondGard EPDM liner offers unmatched quality and versatility. Key Features: Industry-standard 45 mil EPDM pond liner Flexible, durable, and easy to install Puncture-resistant and UV-stable Safe for fish, plants, and aquatic ecosystems Resistant to microbial and environmental damage Requires minimal maintenance Backed by a 20-year warranty Dimensions: 20' x 22.5' Thickness: 45 mil (1.14 mm) Material: EPDM synthetic rubber Color: Black Brand: Firestone PondGard Warranty: 20 years Made in USA Whether you’re creating a tranquil koi pond or a stunning backyard waterfall, the BestNest Firestone PondGard EPDM Pond Liner delivers unmatched reliability, strength, and peace of mind—making it the perfect foundation for your next water feature.

• Industry-Standard Pond Liner Trusted 45 mil EPDM rubber liner from Firestone PondGard, designed for decorative ponds, waterfalls, and water gardens. Highly flexible and durable for long-term use.
• Flexible & Easy to Shape EPDM membrane retains high flexibility, even in cold weather, allowing it to conform easily to the unique contours and dimensions of any pond design.
• Exceptional Strength & Resistance Offers outstanding tensile strength and puncture resistance while withstanding UV rays, ozone, and environmental wear for reliable performance year after year.
• Safe for Fish & Aquatic Plants Formulated to be non-toxic and safe for fish, plants, and wildlife. Meets EPA and ASTM standards for water quality and biological safety in aquatic environments.
• Natural Aesthetic with Depth Classic black color enhances pond appearance, providing the illusion of greater depth while adding UV protection for improved longevity and stability.