Also known as Coroplast, corrugated plastic is a sturdy, semi-permanent material. It is ideal for outdoor use, as both the material and the printed surface (which is typically created with cured UV ink) is resistant to most weather conditions. This material does not damage easily and is still holds up aesthetically even if it does somehow get bent.
There are limitations on finishing and customisations, as the image is printed directly onto the material. Corrugated plastic is also more difficult to cut and re-size by hand. It isn’t easy to affix to surfaces with adhesives, as it’s a bit too heavy and plastic has poor adhesive properties. I can also be more expensive than foam core.