What is Coroplast?

Coroplast is a brand name for corrugated plastic (other brand names include Polyflute and Correx). It is made of twin-walled polypropylene with a fluted core that gives it structural strength. Coroplast is also heat sensitive and is prone to warping when displayed or stored in areas of high heat. However, an indoor sign subject to gentle treatment and occasional cleaning will last up to 5 years.