Website made using only Xara Web Designer, and no other graphics or software tools. Coroplast looks like cardboard but is made of polypropylene, a plastic product. Many call it corrugated plastic. It is very lightweight while being so tough you can't tear it. Coroplast is weather resistant enough to be durable in tempory outdoor applications. Typically we stock 4mm white and yellow 48" x 96" sheets. It is also available in 6mm and 10mm by request. It is also available in many colors. Coroplast Edge view of typical coroplast material.