LifeGuard Pond Liner 5 ft x 100 ft 45 Mil EPDM Rubber - Durable

In this review the LifeGuard Pond Liner 5 ft x 100 ft 45 Mil EPDM with UnderGuard underlayment is evaluated for homeowners and small-scale pond builders who need a heavy-duty, long-lasting waterproof membrane. The bottom line: this liner is aimed at anyone building water gardens, koi ponds, waterfall features or retention basins who wants an extra-thick, puncture resistant material that lays flat and is easy to shape. Our review finds it stands out for durability and material quality, with the added reassurance of a limited lifetime warranty and certification as fish and wildlife safe.

Key Features

• 45-Mil EPDM Construction: The thick EPDM rubber delivers strong puncture resistance and long-term resilience in outdoor installations.
• UnderGuard Underlayment: Included geotextile underlayment protects the liner from soil and sharp objects and is provided in pieces equivalent to the liner area for easy handling.
• Limited Lifetime Warranty: The warranty gives confidence for permanent features such as ponds, streams and retention basins.
• Fish & Wildlife Safe: Certified safe for fish and wildlife, making it suitable for koi ponds, aquaponics and hatcheries.
• No Plasticizers: The material formulation avoids plasticizers that become brittle, reducing the chance of cracking or splitting over time.
• Pliability and Ease of Install: The liner lays flat and is pliable for shaping around waterfalls, rocks and other landscape features.

Who It's For

This liner is best for homeowners, landscapers and hobbyist aquaculturists who need a robust pond membrane for water gardens, koi ponds, waterfalls and small lakes or streams. Its thickness and underlayment make it especially appropriate where longevity and puncture resistance are priorities.

It is less appropriate for extremely small decorative containers where a custom-cut thin liner might suffice, or for installers who require lift-gate delivery included; freight truck delivery requires scheduling with a working phone number and lift-gate service is not included.

Pros & Cons

Pros

• Very durable 45-mil thickness provides dependable protection against punctures and UV exposure.
• UnderGuard geotextile adds a protective layer that simplifies installation over rough ground.
• Material is certified fish and wildlife safe, suitable for biological installations like koi ponds and aquaponics.

Cons

• Heavy weight means the roll can be cumbersome to move and position without help or equipment.
• Freight delivery requires coordination and lift-gate is not included, which can add logistics for some buyers.

Specifications

Product	45-Mil EPDM Rubber Pond Liner with UnderGuard
Size	5 ft x 100 ft
Thickness	45 mil
Underlayment	Geotextile UnderGuard (multiple pieces equal area)
Warranty	Limited Lifetime Warranty
Safety	Certified Fish & Wildlife Safe
Shipping	Ships via freight truck; lift-gate not included

Our Verdict

The LifeGuard 45-mil pond liner is a sensible choice for builders who need a thick, long-lasting membrane that resists punctures and is safe for fish. Considering the underlayment, warranty and certification, it offers strong value for outdoor water features, though buyers should plan for handling the heavy roll and arranging freight delivery.

Frequently Asked Questions

Is this liner safe for koi and other fish?
Yes. The liner is certified fish and wildlife safe, making it suitable for koi ponds and aquaponics.

How is the underlayment supplied?
The UnderGuard geotextile underlayment is provided in multiple pieces equivalent to the total square footage to protect the liner and ease installation.

Do I get lift-gate delivery?
Lift-gate service is not included; the item ships via freight truck and carriers require accurate contact information to schedule delivery.