Pond Liner & Underlayment

(19 products)

Line your pond with the finest high quality pond liner by choosing from our wide selection! Create a durable foundation...

Line your pond with the finest high quality pond liner by choosing from our wide selection!

Create a durable foundation for your aquatic paradise! Our collection features a variety of exceptional pond liners, including Firestone 45 mil EPDM, PolyGuard 20 mil PVC, AquaArmor 24 & 30 mil LLDPE, as well as 2-part liquid epoxy liner – all guaranteed to be fish-safe.

Our heavy-duty underlayment provides protection against rocks, twigs and other debris to help ensure a longer life for your pond liner. This quality underlayment weighs approximately 6 oz. per square yard (when dry).

The use of this underlayment protects rubber pond liner by increasing puncture resistance by 300-400%!

Pond Liner CALCULATOR

Enter the largest measurement for each dimension. If you're digging a pond 10 feet wide on average, but there is one section that measures 12 feet wide, please use 12 feet as the width.

Liner is manufactured in widths divisible by 5. Therefore, our liner calculator always rounds up the width to the nearest multiple of five.

Pond Length

Pond Width

Pond Depth

Calculated Liner Length

Calculated Liner Width

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3' x 5' (1)
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Anjon (3)
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Firestone (2)
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$0.49 off

Firestone
Firestone QuickPrime Plus Seam Primer for EPDM pond liner | 1 Qt.

$69.50 ~~$69.99~~

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Aquascape
Aquascape 22010 Black Silicone Sealant - 4.7 oz.

$12.98

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Pond and Garden Depot
Pond Armor Pond Shield Primer

From $58.75

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