PU shutters are also referred to as painted shutters. They are coated with polyurethane, then with paints for waterproofing. The shutters are left with a hard, resilient texture; making them long-lasting and waterproof. The finish of these shutters is usually quite durable and allow for great functionality. The wood under the coating itself also becomes quite hard afterwards. Coating takes skilled painters to enhance the overall look and aesthetic appeal. Another great attribute of these PU coated shutters are the easy cleaning and maintenance they allow.