Colours for Cement are specifically formulated to colour cement, concrete, mortars, renders and screeds. This buff cement dye uses pigments that conform to EN 12878 : 2014 and is lightfast, with easy dispersion into the dry mix. The buff mortar dye is suitable for interior and exterior use and is intermixable with other colours in the range to give a wide range of shades. Concrete dyes don't affect the performance of the finished mixture when used as directed.