Shop for Gatorplast® Board. Gatorplast® board is comprised of extruded polystyrene foam bonded between two layers of high-impact polystyrene cap sheets which are smooth, offering high-impact facers that resist warping. Lightweight and water resistant. Vinyl graphics can be repositioned. Standard sizes available. Gatorplast® is sold in cartons of 2-15 sheets. Stocked materials typically ship in 2-5 business days. Can’t find what you need? Get a quote.