What gets built before color ever enters the picture
Everything that decides how long a stamped slab lasts, structurally, gets built before anyone thinks about color or pattern. Compacted stone base, reinforcement, the right thickness for what will sit on it, and control joints spaced to the slab. Stamped concrete is an ordinary slab with two extra operations layered onto that same foundation, so a stamped patio poured on a properly prepped base holds up exactly like a plain broom finished one poured the same way.
That is worth saying plainly because people sometimes assume decorative work is inherently more fragile than plain concrete. It is not. What is different is what sits on top of it.
What happens on pour day that decides how the color holds
Two different techniques put color into a stamped slab, and both change how the finished surface ages. One mixes pigment into the concrete itself at the plant, so the tone continues straight through the slab and does not disappear if the surface ever gets scuffed or chipped. The other casts a color hardener onto the surface once it has been floated, which builds up a tougher, more saturated layer exactly where feet and tires meet the concrete. The pattern gets pressed in right after, and a release agent keeps the mats from sticking to it.
None of that decides how long the look lasts on its own. What decides that is what happens after the mats come up and the slab cures.
The first two seasons
A new stamped slab moves through more color change in its first year or two than it will for the rest of its life. Sunlight softens the pigment a shade over that stretch, and the pace of that shift drops off sharply once the early adjustment is done. Meanwhile foot and vehicle traffic starts wearing the raised parts of the pattern paler while the recessed grout lines stay dark, which is the contrast that gives a stamped slab its stone-like depth once it settles in.
None of that is damage. It happens on schedule whether the sealer routine is perfect or not, and it is the baseline the slab lives at before upkeep becomes the thing that matters most.
The recurring part: staying ahead of the sealer
Past that early settling-in period, how long a stamped slab keeps its look comes down almost entirely to keeping fresh sealer on it. Plan on a recoat roughly every two to three years as a starting point, closer to two under a lot of direct afternoon sun or near trees dropping debris on the surface. A recoat is a real job, not just rolling product over what is there: the old surface gets cleaned and has to dry all the way through first, since trapping any moisture underneath is what causes the cloudy blush people sometimes mistake for a bad batch of sealer.
Building the coat up in two light passes rather than one thick one is what makes it wear evenly instead of lifting off in patches within a few winters. Stay on that rhythm and a stamped slab can hold close to its pour-day look for a long stretch, because the sealer is absorbing the weather and the traffic that would otherwise reach the colored surface directly.
What happens if resealing lapses
Let the sealer go long enough and two things happen. The color flattens out and the surface starts picking up grease and leaf stain it used to shed. Push it further and the fix stops being a simple recoat and turns into stripping and rebuilding the wear layer, which is a bigger job than staying ahead of it ever would have been.
The slab underneath is usually still fine through all of this. A neglected sealer schedule is a cosmetic problem for a long time before it becomes a structural one, which is the part that surprises people who assume a faded stamped patio means the concrete failed.