In contrast to other products, Fertan does not cover the rust, but dissolves it chemically, no acidic surface leaves it back and does not convert it into a dry film. On the surface it forms a compact layer of iron tannin compounds that are insoluble and an excellent basis for later rust protection paintings such as synthetic, polyurethane paintings, etc. The protective effect of Fertan continues for years, on the condition that the treated surface is provided with a lacquer layer or another covering product. Before the post -treatment (e.g. painting) inject the area with water or rub the black dust created by conversion of the rust with a wet cloth. A liter Fertan Is sufficient for an area of approx. 15m². On light areas can Fertan Cause stains. Therefore, cover substrates and the spl.
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