Coroplast, or perforated corrugated. plastic,  is the mainstay of the sign
industry. It’s a rigid plastic that comes in 10 colors and either ¼” or ½”
thickness. Very inexpensive and only good for short term outdoor use.  We
generally cut vinyl with either text, photos or both and apply it to the
coroplast material. Coroplast is generally used for short-term roadside signage.

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