Coroplast® is the trademark name for a popular manufacturer of this plastic material. It is also referred to as Corr-x, Plasticor, Hi Cor, Correx, Corriflute, Corflute, Coroflute, Cadflute, Fluteboard, Polionda (Portuguese), Twinplast, Kanalplast (Swedish), Corlite and numerous others.
Although it is identical to cardboard, it is made from plastic, not paper. It is a polypropylene copolymer most commonly found in 4x8 ft² sheets throughout the US. While difficult to find, it comes in a variety of colors, and also, thicknesses. We use the most common 4mm thickness for our products.
The material stands up so well to harsh elements that its primary use is in outdoor signage. The lightweight material can be cut with a razor blade, box cutter or sharp scissors. Coroplast is waterproof, inert, reusable and recyclable. These characteristics make it an optimal choice for use in guinea pig cages!
Coroplast CANNOT be found online in a single sheet large enough to ship that would make a cage. Online plastics vendors sell smaller pieces that will fit in standard shipping boxes. These pieces would have to be cut and taped perfectly to work in a cage. We know because we created C&C cages so we have mastered the art of cutting, scoring and folding Coroplast for shipping.