"Hard foam sheets" are available in PVC material such as Forex or Kömaprint and alternatively there are GATORFOAM sheets with an insert of rigid polystyrene foam. The boards have a comparably low weight, do not absorb water, and do not rot or become brittle. Due to their easy treatability, they are used in displays, shop window decorations, interior design, for construction site signs and model making as well as in trade fair stand and shop construction.