Colored sound-insulating walls manufactured from concrete keep the noise out. They are used mainly on highways or motorways. They can be colored so that they blend in with their surroundings, to create a uniform effect with neighboring buildings, or so that they stand out.

Inorganic Bayferrox® or Colortherm® pigments from LANXESS demonstrate that sound insulation need not be just gray. Noise barriers colored with LANXESS pigments show special characteristics since the products display high quality levels in terms of color strength and color consistency. Because of their chemical structure these products are highly weather stable, lightfast and UV-stable and are very well suited for coloration of construction material. At the same time, the LANXESS production processes ensure low environmental impact. These requirements are of special importance since the sound insulating walls are exposed to different climatic conditions.

The color range of the entire Bayferrox® and Colortherm® product portfolio includes Yellows, Reds, Greens, Browns and Blacks. In between these colors a wide variety of additional shades are possible. The shades tend towards the opaque colors found in nature, and thus fit harmoniously with the environment. Pure colors like yellow can be made by using white cement. Brilliant, glossy shades, like those obtained in plastics and surface coatings, are very difficult to produce in building materials because of the composition and structure of the concrete.

The Global Competence Center Construction will gladly answer individual customer inquiries with respect to this field of application or provide further information about LANXESS pigments.