Concrete doesn't dry — it cures, through a chemical reaction that needs moisture and time. What happens in the first month sets the surface strength you'll live with for the life of the slab.
The timeline that actually matters
Concrete reaches roughly 70 percent of its design strength in the first week and continues gaining for a month or more. Loading it early doesn't just risk damage that day — it can permanently reduce what the slab ends up capable of.
- 24–48 hours: forms come off, keep everything off the surface
- 3–7 days: light foot traffic is fine
- 7 days: patio furniture and normal use
- 28 days: full design strength, vehicles on a driveway, sealer can go down
Keeping it moist is the point
The instinct is to let new concrete dry out. That's backwards — curing needs water, and concrete that dries too fast ends up with a weak, dusty surface that scales off in a few years.
In hot or windy weather we'll apply a curing compound or ask you to mist the slab a few times a day for the first several days. It looks like a small thing and it makes a large difference to surface durability.
Sealing, and when
Sealer goes on after the slab has cured — 28 days is the standard wait. Applying it early traps moisture in the slab and can cause the sealer to fail and cloud.
Once it's down, sealer keeps water and salt out of the surface pores, which is exactly where freeze-thaw damage begins. Plan on resealing every two to three years for exposed surfaces, and sooner for stamped concrete where the sealer is also carrying the color.
The first winter is the dangerous one
Never use de-icing salt on concrete in its first winter. New concrete hasn't fully developed its surface resistance, and chlorides drive freeze-thaw damage straight into the pores. The result is scaling — the top layer flaking off in sheets — and it's permanent.
Use sand for traction instead. It gives you grip and does nothing to the surface. After the first winter, avoid ammonium-based and magnesium chloride products entirely; calcium chloride used sparingly is the least harmful option if you need something.
A simple annual routine
Sweep and rinse before winter so leaves and organic debris aren't sitting on the surface holding moisture. Check that joints are still clear and sealant is intact. Plow and shovel with a plastic or rubber-edged blade rather than steel.
Keep an eye on any new cracking. Routing and sealing a crack early costs very little and stops water from getting into the base beneath, which is where the expensive problems begin.