Coroplast signs are an inexpensive and often temporary form of signage. Coroplast refers to the material on which the sign is printed. This is essentially a plastic cardboard.
They can be used as indoor signage or outdoor signage but are most commonly seen in real estate or political signs. Despite their low cost they can produce an eyecatching sign that only the owner knows is inexpensive.
If you are looking for inexpensive signage coroplast is definitely an option to consider.