Tried and trusted for many years, EPDM (Butyl) rubber is tough, durable and pliable, and for a time, was the only liner of choice. Its main advantage is that it can be box-welded to intricate shapes to provide sharp, neat corners in more formal ponds. Simply let us know the shape and size of your pond or water feature and we will get back to you with a price and a date for delivery, direct to site.