A graphic panel system for providing a message spanning all or substantially all of a readerboard is provided. When an engaging element forming surface of the surface fastener is placed on a concavo-convex surface of foaming body molding cavities of a foaming mold, if the mold has the same magnetic force as that in the related art, the linear sealing body is well adhered along the concavo-convex surface. The present invention also provides a product comprising a preservative effective amount of the aforementioned mixture.