Our coroplast clear coat process should last 3-6 months outdoors (even in the Tucson sun). And as an interior sign, foam core signs and coroplast signs can last years. The major reason is an exclusive coroplast clear coat process used by Graphic Impact. We recommend that if you are planning on using a coroplast (corrugated plastic) sign outdoors that you insist on a clear coat finish
Clear coating a sign also will make some colors even more vivid. It’s a great look and a very inexpensive one!
A clear coat finish tends to make signs more scratch resistance so, depending on how the sign will be used, this can also be a big advantage.