EPDM stands for Ethylene Propylene Diene Monomer and is often referred to as synthetic rubber. EPDM pond liners fall under the classification of flexible pond liners, meaning they can be manipulated into nearly any size and shape. The chemical structure of EPDM makes the material naturally resistant to UV rays and the effects of weathering, and products sold as pond liners are typically safe for both fish and plants.
Often, one sheet of EPDM rubber material will be big enough to meet your needs. However, if you are creating a larger pond, it's a simple process to tape multiple sheets together to achieve your desired results, though care must be taken when joining sheets to ensure a durable, waterproof seal. This means you can save money since you won't need to hire a professional pond installer with a wealth of equipment to get your pond up and running.
