Our 4mm Coroplast signage is typically used for yard, parking, real estate, and election signs. Durable and waterproof, these signs are printed with UV-cured inks for outdoor use. We also have durable, steel H-Stake available as an option for use as Yard Signs. Note: if using H-Stakes, make sure to place your rigid sign order with the Width size bigger than the Height Size and order with vertical flutes.