Lightweight, yet sturdy, aluminum is a great choice for outdoor signs. Recycled composite core sandwiched between two sheets of aluminum make these panels extremely lightweight and durable. Aluminum signs are designed to last for years. You can get Aluminum signs in either 1 or full color. We recommend full color. Aluminum signs are rigid which allows them to be mounted without the need for a backing. These signs have can take a curve or be bent. Aluminum signs are weather proof and rust free.