For this project we added a Grey color to the Concrete Mix, the most important factor is to keep the consistency of the concrete within the different trucks, but even with consistent mix, concrete doesn’t cure evenly, some slabs starts to dry faster than others resulting in disparity of color. Within a week or two, the color start to even out as the slabs cure.
Sealer helps to even out the disparity of color as it creates a shine finish and darkens the original color
