This EM-Plastic® Hi-Core corrugated sheet is useful for making signs, bus boards, freestanding displays, packaging, or for craft projects. It's much stronger than cardboard and is resistant to water, which makes it ideal for permanent or semi-permanent use. Each corrugated plastic sheet measures 32 sq ft, and you can cut it down to make multiple smaller signs or use it to cover large sections of a wall. This product is resistant to chemicals and rainwater and won't rust, rot, or warp. Besides signs, you can also use the board to create temporary moulds for resin and a host of other applications.