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 (in the US). The version (and most common) that we use is 4mm thick (less than 1/4 inch). It can come in a variety of colors, although not many specialty plastic stores carry a large selection of colors.
You CANNOT find it online in a size large enough to make a cage that can be shipped to you. As we created C&C cages in the first place, we know very well the challenges of shipping Coroplast. All online plastics vendors of Coroplast sell smaller pieces that will fit in the boxes that the standard carriers will accept. Smaller pieces have to be cut perfectly and taped together to work for a cage. A standard 2x4 grid-sized cage requires a single piece of Coroplast of 39 x 68 inches. We have mastered the art of cutting, scoring and folding Coroplast for shipping with our cage kits.