What is the best material for lining my garden pond, rubber or cement?

Ponds and water features can be lined with cement; however cement will deteriorate and crack in time unless it is heavily reinforced with steel. This can be extremely expensive and requires a great deal of knowledge of installation techniques. Rubber liners are extremely durable and offer the added benefit of flexibility which allows them to conform to irregularities and shifting in the surrounding terrain. Rubber liners also require less manpower to install and, depending on the mil rating, will last 20 years or more.  more