The nanodeck® fire protection for paper & cardboard NANODECK FIRE PROTECTION Cardboard/Paper is a fire protection impregnation for cardboard and paper in accordance with DIN 4102-B1, as well as for straw in the interior. NANODECK FIRE PROTECTION cardboard/paper is ecological (odorless, free from halogen, heavy metal and solvents) and easy to process (application with immersion or spraying method). The impregnation contains a highly efficient combination of near-natural nitrogen and phosphor compounds. In the case of fire non-flammable gases develop, the coated material carbonizes and extinguishes automatically.