HDPE Pond Liners

An HDPE pond liner is an impermeable geomembrane made from high-density polyethylene that lines the bottom and sides of a pond, reservoir, or lagoon to stop water loss and protect the underlying soil and groundwater. HDPE is the most widely specified pond liner material because it combines high tensile strength, excellent UV and chemical resistance, and a long service life. EFI fabricates and installs HDPE pond liners from 30 to 100 mil for irrigation, agricultural, aquaculture, decorative, and industrial ponds across 45 states.

Most ponds use 30 to 60 mil HDPE. Smaller irrigation, agricultural, and decorative ponds on a well-prepared subgrade are typically lined with 30 to 40 mil. Larger reservoirs, regulated containment, and ponds with heavier loads or foot traffic step up to 60 mil or more. Thicker membrane delivers greater puncture resistance and a longer service life but costs more and is heavier to install. EFI's engineers specify the right thickness after a free site assessment of your subgrade, water type, and regulatory requirements.

Yes. HDPE is chemically inert and non-toxic, which is why the same material is used for aquaculture systems, fish farm ponds, and potable water reservoirs. EFI installs fish-safe HDPE liners designed for biological compatibility, with seams welded rather than glued so there are no solvents or adhesives in contact with the water.

Installed HDPE pond liners typically run $0.50 to $1.50 per square foot for agricultural and irrigation ponds, with larger, thicker, or heavily regulated systems reaching up to $3.00 per square foot. Final cost depends on liner thickness, pond size and shape, subgrade preparation, site access, and quality-assurance requirements. EFI provides a detailed proposal after a free site assessment that reflects your specific conditions.

An HDPE pond liner can last 50+ years when buried or protected from direct sunlight, based on Arrhenius modeling and field performance data. Exposed HDPE with UV stabilizers and 2%+ carbon black typically provides 20 to 30+ years depending on climate and chemical exposure. EFI's rigorous installation and quality-assurance program is designed to deliver the maximum service life from every liner.

Yes. EFI repairs punctures, tears, and seam defects in the field using extrusion welding with material-compatible HDPE. For ponds with a failed or aging liner, EFI can install a complete relining system over the existing liner, often without removing the original material. Every repair and reline restores full containment integrity and is documented in the QA package.