Abstract: The invention relates to the field of chemistry and relates to a coating for wood materials, which serves as a basis for subsequent coatings. The object of the present invention is to disclose a coating, with the aid of which the conductivity of the wood materials is improved. The object is attained by a coating, in which the outer and/or inner surface of a wood material is provided with polyelectrolytes which were dissolved or are or were dispersed in water and/or an organic solvent at least up to processing, with a largely uniform distribution and wherein at least 10 g polyelectrolyte is present per square meter. The object is further attained through a method in which an aqueous solution and/or dispersion of polyelectrolytes is applied on the outer and/or inner surface of wood materials, wherein at least 10 g cationized polyelectrolyte solid is applied per square meter coated outer and/or inner surface of the wood material.