Lifeguard 20 ft. x 90 ft. EPDM Pond Liner 45-Mil Rubber Liner

Our review of the Lifeguard 20 ft. x 90 ft. EPDM Pond Liner finds it best for DIY pond builders and water feature projects that need a robust, flexible membrane. The single biggest reason to buy is its 45-mil EPDM construction, which stays flexible year-round and resists UV and puncture damage better than vinyl alternatives. Installers who value ease of shaping, fish safety, and long-term durability will appreciate this liner, though those needing custom-cut delivery or lift-gate service should plan logistics ahead of time.

Key Features

• 45-mil EPDM rubber: Provides a thick, resilient barrier that resists tearing and maintains flexibility in cold and hot weather.
• UV and puncture resistant: Holds up to sunlight exposure and general abrasion around waterfalls, shelves, and streambeds so you can expect longer service life.
• Fish and wildlife safe: Certified safe for koi, turtles, and aquatic life, making it suitable for ponds, fish hatcheries, and aquaponics systems.
• No plasticizers: Stays flexible without cracking or splitting over time, unlike vinyl liners that can become brittle.
• Easy to cut and shape: Lays flat and conforms to curves and features, which simplifies do-it-yourself installations and in-pond adjustments.
• Versatile outdoor use: Sized and durable enough for ponds, waterfalls, retention basins, and water gardens, offering broad application options.

Who It's For

This liner is aimed at homeowners and landscapers building medium to large outdoor water features who want a long-lasting, fish-safe membrane. It suits DIYers who need a flexible material that conforms to irregular pond shapes and who prioritize UV resistance and puncture protection.

It is less appropriate for someone who requires on-site cutting and lift-gate delivery as standard freight shipping applies and lift-gate is not included. Customers wanting thin, low-cost vinyl substitutes or those needing pre-formed rigid liners should look elsewhere.

Pros & Cons

Pros

• Durable 45-mil thickness provides good abrasion resistance and long-term flexibility.
• Certified fish and wildlife safety removes concern about toxicity for koi and turtles.
• Easy to shape and lay flat, making it practical for complex pond contours and DIY installs.
• Resists UV exposure and will not crack or split like vinyl alternatives over time.

Cons

• Some users report mixed experiences with puncture resistance depending on site conditions, so heavy debris or sharp rocks require careful underlayment.
• Ships via freight truck without lift-gate included, which can complicate delivery for some buyers.

Specifications

Material	EPDM rubber
Thickness	45-mil
Size	20 ft. x 90 ft.
Primary uses	Ponds, waterfalls, streambeds, aquaponics, retention basins
Safety	Certified fish and wildlife safe
Weather resistance	UV and puncture resistant, no plasticizers
Shipping	Freight truck (lift-gate not included)

Our Verdict

The Lifeguard 20 ft. x 90 ft. EPDM Pond Liner is a sensible choice for pond builders who need a thick, flexible, and fish-safe membrane that outperforms vinyl in durability and seasonal flexibility. It represents good value for projects where shapeability and long-term resistance to UV and cracking matter, provided buyers account for freight delivery details and protect the liner from sharp debris during installation.

Frequently Asked Questions

Is this liner safe for koi and other fish?
Yes, it is certified fish and wildlife safe and is suitable for koi, turtles, and aquaponics systems.

Will the liner crack in winter?
No, the EPDM formulation contains no plasticizers and stays flexible year-round, reducing the risk of cracking or splitting in cold weather.

How is the liner shipped?
The liner ships via freight truck and does not include a lift-gate, so confirm delivery contact details and handling needs before purchase.