Three part process, once concrete was down and setting a bit dry dye was thrown on very heavily like sand almost, that absorbed for a hour or so to where surface was firm enough to walk on then another round of dye applied so that stamps do not stick, then the stamp was tamped down quite aggressively. Took quite some time actually. Once done they left the loose solids on for a couple of days then leaf blew it off then did edges. Let that sit for a few days then pressure washed. Once that was completely dry they applied a wet sealer that enhanced the dark portions and sealed the color in. I wanted it to look like rustic reclaimed barn wood deck. We really like it.