concrete acid stain COUPCOLOR®CAS as a paint for concrete surfaces. This substance penetrates the concrete tissue and reacts with the calcium on its surface to cause the concrete surfaces to stain. As a result, the color of acid stain is created by the reaction of this material with the concrete surface. For this reason,acid stain is not scientifically classified as a dye.
The amount of paint and the color spectrum created depends on the type and quality of the concrete surface and the grade of concrete. The higher the grade of concrete, or in other words, the higher the amount of cement on the concrete surface, the higher the colorability. Therefore, the final color of acid stain is determined after its reaction with the concrete surface.