Easter 2023 Egg Yard Sign Decorations - Coroplast Easter Home Decor, Easter Egg Sign, Easter Egg Cutouts, Easter Eggs Yard Decor with Stakes. Economical and durable, our Coroplast Yard Signs are a staple of outdoor advertising. These outdoor Easter Egg Yard Sign full-color direct printed graphics are vertically fluted for use with a D Wire. Coroplast is typically used for yard, parking, real estate, and election signs. They are waterproof.