This Precast Concrete Coping has a lightweight concrete design. It has an excellent resistance to chemicals, abrasion, UV, efflorescence, and freeze-thaw conditions. Coping provides a smooth surface and acts as a great finishing accent. It covers the pools concrete edges and prevents water from getting behind the pool shell and walls. These strong, durable Artisan Series Pavers won't fade over time and their low water absorption prevents mold and mildew.