• Folded black pond liner on a white background
  • Black material being stretched and cut with Aquascape branding, highlighting features.
  • Advertisement for Aquascape products featuring images of ponds, fountains, waterfalls, and streams.
  • Three people working on a large black pond liner with 'Aquascape' branding.
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Aquascape

45 mil EPDM Pond Liner - Custom Size

45 mil EPDM Pond Liner - Custom Size

CL10-10

$199.00 CAD
$199.00 CAD
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Shipping calculated at checkout.
Width (ft)
Length (ft)

45 mil EPDM Pond Liner – Fish Safe Waterproof Liner for Ponds, Waterfalls & Water Features

Our 45 mil EPDM pond liner is a professional-grade waterproof membrane designed for koi ponds, garden ponds, waterfalls, and decorative water features. Made from durable EPDM rubber, this liner provides excellent flexibility, UV resistance, and long-term durability in outdoor environments.

Safe for fish and aquatic plants, EPDM liners are trusted by pond builders and landscape contractors for reliable pond construction and leak prevention.

-Fish-safe EPDM rubber
-45 mil professional thickness
-Flexible for easy installation
-UV, ozone and weather resistant
-Ideal for ponds, waterfalls, and water features

Available in multiple sizes to fit your pond project.

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Product description

Professional Grade 45 mil EPDM Pond Liner

This 45 mil EPDM pond liner is the gold standard for waterproof membranes. Designed for koi ponds, waterfalls, and decorative water features, this rubber liner combines extreme durability with the flexibility needed for complex Canadian landscapes.

Trusted by contractors and homeowners across Ontario for its 20+ year proven performance.

Why Choose our 45 mil EPDM Liner?

  • Superior Durability: 45 mil thickness (1.14 mm) provides maximum resistance to punctures and environmental stress.
  • Extreme Cold Flexibility: Specifically engineered to remain supple in Ontario’s extreme freeze-thaw cycles (remains flexible down to -45°C).
  • UV & Ozone Resistant: Full protection against sun exposure without cracking or degrading over time.
  • Fish & Plant Safe: 100% non-toxic formulation, certified safe for sensitive Koi and aquatic ecosystems.
  • 20-Year Material Warranty: Built for long-term peace of mind and structural integrity.

Technical Specifications

Material Premium EPDM Rubber Membrane
Thickness 45 mil (1.14 mm)
Weight Approx. 0.3 lbs per sq. ft (Heavy Duty)
Lifespan 20-40 years (when installed with underlayment)

📏 How to Calculate Your Liner Size

Use this professional formula to ensure you have enough material for the edges and anchoring:

Liner Length = Max Length + (2 × Max Depth) + 2 ft (Overlap)
Liner Width = Max Width + (2 × Max Depth) + 2 ft (Overlap)

*Pro Tip: If your pond has steep vertical walls, add an extra 1 foot to the overlap for secure rock placement.

Professional Installation Recommendations

  • Use Underlayment: Always install a protective geotextile fabric beneath the liner to prevent punctures from sharp rocks or roots.
  • Sun Exposure: Lay the liner out in the sun for 20 minutes before fitting; it will become much easier to mold into corners.
  • Handling: 45 mil EPDM is heavy. We recommend at least two people for positioning liners larger than 15' x 20'.

Need a Custom Size or Large Roll?

Our team provides expert advice and custom-cut liners for projects of any scale across the GTA.

Contact an Expert