Corrugated plastic(Coroplast®) signs are lightweight, economical and durable. It consists of an extruded plastic, weatherproof material with a fluted core center. It is nontoxic, recyclable, can be cut into custom shapes, and is ideal for demanding applications.
PVC (Sintra) is great for use on menu boards and in-store advertising that will be displayed on a wall or stand.
Foam Board is great for short-term indoor use and is lightweight and versatile.