I took this pic a long while back. This represents an acid stained piece of concrete with ascending sealers. The entire piece was acid stained, then scored, then sealed. Starting with a densifier SW (penetrating sealer) , NW Water Based Acrylic, NE SEC Sealer, ending with a clear urethane SE (topical sealer).
Not only are the colors asleep, in the SW quadrant, but if left in the sun they will dissipate or bleach out. Even integrally colored concrete needs to be kept topically-sealed to look good.
