White Coroplast® is a high quality extruded thin walled corrugated plastic sheet formulated specifically for use in packing. It is extremely durable, waterproof and resistant to stains and most chemicals. Coroplast® is produced from a high impact polypropylene copolymer 157" (4mm) thickness. Coroplast® uses a copolymer resin in order to increase impact and low temperature performance. Chemically, the sheet is inert, with a NIL pH factor. It does not have anti static agents and is not corona treated. At regular temperatures, most oils, solvents and water have no effect, allowing it to perform under adverse weather conditions.
It can be used as a backing material for paintings and framed works on paper and in the manufacture of crates.
Archival Coroplast® is available. It is much more costly than Coroplast® and there is disagreement among professionals if it is a superior product.