Guide

Choosing the right pond liner material

PVC, EPDM and butyl — each has its strengths. Here's an honest breakdown to help you decide.

The three main materials

Almost all pond liners are made from one of three materials: PVC (polyvinyl chloride), EPDM (ethylene propylene diene monomer) or butyl rubber. Each has distinct characteristics.

PVC

  • Weldable — the only material suitable for box welding
  • Flexible and easy to handle
  • Resistant to UV, chemicals and abrasion
  • Available in 0.75mm and 1.0mm thicknesses

EPDM

  • Very flexible, even at low temperatures
  • Good UV and ozone resistance
  • Typically heavier than PVC
  • Available in limited thicknesses
  • Available in 0.75mm and 1.0mm thicknesses

Butyl rubber

  • Extremely flexible and puncture-resistant
  • Good for very cold climates
  • Heavier and more expensive than PVC or EPDM
  • Less common today than in previous decades
  • Available in 0.75mm and 1.0mm thicknesses

Our recommendation

For a box-welded liner, both PVC and Rubber are great options. Durable, fish-safe, weldable to precise tolerances and backed by a 25-year guarantee. If you are comparing a box-welded boxwelded liner against a flat sheet EPDM liner, the comparison is less about material and more about construction method.

Frequently asked questions

Both PVC and Rubber materials are great options for box-welded pond liners. If you are sure which pond liner would be best for your project we can offer advice.

Yes. Our PVC is inert once installed and safe for fish and aquatic plants. It is the same specification used in commercial aquaculture.

Both materials offer excellent longevity. EPDM is very slightly more flexible at low temperatures; PVC is more resistant to oils and chemicals. For most garden pond applications, the difference is negligible.

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