What is Coroplast®?Coroplast® is the trademark name for a popular manufacturer of this plastic substrate which resembles cardboard. In fact, it's identical to cardboard, only it's made from plastic, not paper.
It is used primarily in outdoor signage because it stands up so well to harsh elements. It is lightweight and can be cut with a sharp blade, such as a razor blade or box cutter or sharp scissors. It is waterproof and food-safe. It is also reusable and recyclable. These characteristics make a superb candidate for guinea pig cages!
It is known around the world by various names:
Corr-x, Plasticor, Hi Cor, Correx, Corriflute, Corflute, Coroflute, Cadflute, Fluteboard, Polionda (Portuguese), Twinplast, Kanalplast (Swedish), Corlite and numerous others.
To be particular, it is a polypropylene copolymer. It is most commonly found in 4 foot by 8 foot sheets. The version (and most common) that we use is 4mm thick (or 1/4"). It can come in a variety of colors, although not many stores carry a large selection of colors. White is by far and away the easiest (and least expensive) color to get.