UltraBoard consists of a polystyrene foam center faced on both sides by a smooth, moisture resistant sheet of solid polystyrene.  The foam and facers are permanently bonded together insuring flatness and rigidity.  It is lightweight, strong, warp-resistant and durable.  Designed for interior use Ultra®Board is an excellent choice for permanent displays and signage, P.O.P displays, exhibit displays, routed letters, and more.