Usually after 24 hours in normal conditions. Wait longer in cold weather.
Curing Concrete.
Concrete keeps gaining strength for weeks after it's placed, but only if it stays moist and protected. Curing is the simplest way to get a stronger, more durable surface.
At a glance:
7 days : Recommended minimum curing
~70% : Of design strength at 7 days
28 days : When design strength is measured
Why Curing Matters.
Concrete hardens through a chemical reaction between cement and water, called hydration. If the surface dries out too early, the reaction stops. The result is a weaker, more porous surface that cracks, dusts and scales. Well-cured concrete is stronger, more wear-resistant and better protected against freeze-thaw damage.
How Long to Cure.
Cure for at least 7 days where possible. In cool weather, strength develops more slowly, so extend curing and protection. Keep traffic off new concrete: foot traffic after about 24 hours, cars after about 7 days, and heavy loads only once design strength is reached.
Curing Methods:
Start curing as soon as finishing is complete. Choose a method that suits the job.
Curing compound: Sprayed or rolled on to form a membrane that holds moisture in. Fast and practical for most flatwork.
Wet curing: Keep the surface continuously wet with sprinklers or soaked burlap. Very effective, but it must not dry out between wettings.
Plastic sheeting: Covers the surface to trap moisture. Lap and weigh the edges. It can cause uneven colour on decorative work.
Curing blankets: Hold moisture and heat. Essential in cold weather.
Frequently Asked Questions
When can I walk on new concrete?
When can I drive on my new driveway?
Wait at least 7 days for passenger vehicles, longer for heavy vehicles or in cold weather.
Can I seal and cure at the same time?
Some products are cure-and-seal. Others must go on after curing. Check the product instructions and ask us if unsure.
Once the concrete has set, yes. Rain on a fresh, unfinished surface can damage it.
What happens if I skip curing?
The surface can end up significantly weaker, with more cracking, dusting and freeze-thaw damage.
Disclaimer: These guides are general information. Always follow your engineer's specification and local building requirements.
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