There are occasions when wood or any one of several other composite materials is the appropriate substrate to use for your outdoor signage needs. There are a number of different materials that can fill these requirements. Medium Density Overlay Plywood (MDO), Alumalite(R), Omega(R) board, DiBond(R) to name a few. All are durable and versatile, materials designed for a wide variety of outdoor uses including Site Signs, Directional Signs, and Identification Signs.