Rubber cork gasket materials are produced from top quality cork intimately bonded with a synthetic rubber, which may be EPDM, SBR, Nitrile, Neoprene or Polyurethane type. The chemical properties of the material are determined partly by those of the cork and largely by the type of the rubber used. In order to make the right choice in terms of material, it is essential to be familiar with the mechanical, thermal and chemical conditions to which a particular gasket will be subjected during operation