Extruded twin wall fluted/corrugated polypropylene sheet offers efficient solutions to a wide variety of applications. It is the material of choice for today’s screen printing industry, ideal for indoor and outdoor applications. It is tougher than corrugated fiberboard and lighter than extruded plastic sheet. It is waterproof and stain-resistant. All stock sheets are electrostatically double treated by “Corona Discharge” on both sides to allow specifically formulated inks and adhesives to adhere.