The main cause of economic damage to timber and millwork worldwide are Basidiomycetes (brown and white rot). After testing a wide range of triazole derivatives for their effectiveness against decay fungi, Tebuconazole, a triazole compound, was selected. The physico-chemical, toxicological and ecotoxicological data of this substance are described. Tebuconazole is unleachable, light-stable, heat-stable and suitable for use in both solvent-borne and water-borne formulations. Tests carried out by official institutes show that Tebuconazole is resistant to both leaching and evaporation. Toxic values measured in accordance with EN 113 and EN 73 (e.g. Gloeophyllum trabeum: 0.03-0.08 kg/m³ a.i.) reveals the great potential of Tebuconazole to protect treated wood against decay fungi.

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