COR-TEN is a type of steel characterized by a high corrosion resistance and mechanical resistance. Exposed to the weather conditions, it forms a stable rust-like appearance coating of dark brown color, which inhibits deeper penetration. For outdoor use, COR-TEN is supplied naturally oxidized, without further treatment. The oxidation will stabilize over a period of 10-16 months. During this period, rust particles may come off, leading to a risk of staining on light and permeable surfaces. For indoor use, COR-TEN is supplied pre-treated with wax. A wax kit is available on request. For cleaning we suggest to proceed with a simple pouncing on the surface without using any detergent or water. Samples images are an indication only and do not replace the use of real ones, since it is not possible to guarantee a reproduction identical to the original.