3 Main Types of Pond Liner Materials

Choosing a pond liner means choosing a material that’s durable and long-lasting. Pond liners must offer resistance to UV radiation, resilience, and flexibility. A pond liner thickness is measured in “mils.” Thus, one mil equals one thousandth (0.001) of an inch. Here are the main types of pond liner materials:


Polyvinyl Chloride (PVC) is a low-cost plastic commonly found in “budget pond kits”. PVC liners are usually thinner than other types of liner material.

Being thinner also means that PVC pond liners are lighter and easier to work with. However, PVC liners have shorter lifespans compared to more durable and thicker types of liner materials.

Also, some PVC liners do not have UV inhibitors. Thus, they become brittler and crack easily. PVC liners also have little puncture resistance. Thus, leaks are more common.


LDPE (Low-Density Polyethylene) is a flexible plastic sheeting. It fits well inside of a pond. Thickness can range up to about 40 mils. Thus, LDPE is not as strong or puncture-resistant as other liner materials.


EPDM (Ethylene propylene diene monomer) is a synthetic rubber. It is safe for use with ponds. This is the most durable type of pond liner material. It is resistant to UV, ozone, etc.

EPDM is more expensive than other pond liner materials but the durability and lifespan are worth the price.


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