On evaporation of the solvent, DINITROL 81 leaves a transparent, hard and waxy film, ideally suited as a protective coating, affording easy visual inspection of the metal surface, reading of labels, numbers, etc. DINITROL 81 is intended for protection, in storage and in transit, of finished surfaces of steel and of other metals, particularly when a colourless, transparent and smearless film is desired. DINITROL 81 may also be used for protection of lacquered surfaces withstanding white spiritand similar solvents, e.g. different types of tooling and equipment engines and vehicles.