Coroplast is ideal for indoor and outdoor applications. It is tougher than corrugated fiberboard and lighter than extruded plastic sheet. It is waterproof and stain-resistant. The hollow-fluted design makes this sign material extremely easy to handle and simple to display in a number of ways. Our coroplast pole signs use 4mm thickness of coroplast and direct UV printed onto the surface. There is no mounting required, and there will be no color fading. Your image and message will be long lasting throughout the campaign.