LifeGuard Pond Liner 20 ft x 35 ft 45 Mil EPDM Rubber - Durable Pond

In this review the LifeGuard Pond Liner 20 ft x 35 ft 45 Mil EPDM Rubber with UnderGuard underlayment is evaluated as a heavy-duty option for hobbyists and small professionals building ponds, waterfalls, or water features. The bottom line: this combo is for anyone who wants a thick, puncture-resistant liner that lays flat and holds up in sunlight, with the biggest reason to buy being its 45-mil EPDM construction coupled with geotextile underlayment and a limited lifetime warranty for long-term peace of mind.

Key Features

• 45-Mil EPDM Rubber: Provides a thick, flexible barrier that resists punctures and stays pliable for shaping around rocks and features.
• UnderGuard Underlayment: Adds a protective layer between soil and liner to reduce abrasion and extend the life of the pond system.
• Limited Lifetime Warranty: Offers long-term assurance that the manufacturer stands behind material durability and performance.
• Fish & Wildlife Safe: Certified safe for fish and wildlife, making it suitable for koi ponds, aquaponics, and fish hatcheries.
• Versatile Use: Suitable for waterfalls, water gardens, retention basins, stream liners, and lakes for multiple outdoor water projects.
• Easy to Install: Lays flat and remains pliable, simplifying fitting and trimming during installation even for large layouts.

Who It's For

This liner is best for backyard pond builders, landscapers, and hobby aquaculture enthusiasts who need a thick, reliable membrane that stands up to sunlight and general wear. Its size and durability make it a practical choice for koi ponds, water features, and small retention basins where a long-lasting liner matters.

Those who should look elsewhere include customers who need custom-fabricated preformed tanks or who cannot receive freight-truck deliveries easily, since this item ships via freight truck and lift-gate service is not included. Lightweight temporary liners intended for very small containers may be overkill compared with this heavier EPDM product.

Pros & Cons

Pros

• Exceptional material quality and thickness make it durable and resistant to punctures and sun exposure.
• Underlayment included reduces risk of abrasion and simplifies installation in uneven excavations.
• Certified safe for fish and wildlife, so it can be used confidently in aquaculture and koi environments.

Cons

• Heavy weight makes handling a two-person job and can complicate transport and positioning during installation.

Specifications

Material	45-mil EPDM rubber
Included underlayment	UnderGuard geotextile (multiple pieces by total area)
Size	20 ft x 35 ft
Warranty	Limited lifetime warranty
Safety certification	Certified Fish & Wildlife Safe
Typical uses	Ponds, waterfalls, water gardens, koi ponds, aquaponics

Our Verdict

The LifeGuard 20 ft x 35 ft 45-mil EPDM liner with UnderGuard underlayment is a solid buy for anyone building a permanent pond or water feature who values durability, fish-safe materials, and a product backed by a limited lifetime warranty. Its thickness and included underlayment justify the effort of handling the heavier roll, delivering good long-term value for serious outdoor water projects.

Frequently Asked Questions

Does the liner come with underlayment?
Yes, the product ships with UnderGuard geotextile underlayment sized to the total square footage, delivered in multiple pieces if necessary.

Is this safe for fish and aquatic plants?
Yes, it is certified Fish & Wildlife Safe and intended for use in koi ponds, aquaponics, and fish hatcheries.

How is the product shipped?
This item ships via freight truck; lift-gate service is not included and carriers require accurate contact information to schedule delivery.