Shop for FOME-COR JETMOUNT® Board. FOME-COR JETMOUNT® is comprised of denser extruded polystyrene foam with clay-coated paper facers. The denser core provides increased rigidity and warp resistance. Great for demanding mounting jobs for display, signage and framing. Standard sizes available. FOME-COR JETMOUNT® is sold in cartons of 20 sheets. Stocked materials typically ship in 2-5 business days. Can’t find what you need? Get a quote or learn more about foam boards.