How Long Does Concrete Take to Cure? When You Can Walk, Drive, and Seal New Concrete
Quick answer: Concrete is usually ready for foot traffic in about 24 to 48 hours and for cars in about 7 days. It reaches its specified design strength at 28 days, which is when heavy vehicles can typically use it. For exterior concrete in Ontario, the Cement Association of Canada recommends curing for at least 7 days with adequate moisture and temperatures above 10°C. Cold weather slows everything down.
You've just had your driveway, patio, or slab poured. Now comes the hard part: waiting. Below is a clear timeline, what "curing" actually means, and how to protect your new concrete so it performs for decades.
What's the Difference Between Concrete Setting, Curing, and Drying?
These three words get mixed up, but they mean different things:
Setting is when concrete stiffens and stops being workable. This happens within hours of placement.
Curing is the chemical reaction (hydration) between cement and water that builds strength. It continues for weeks and needs moisture and warmth to happen properly.
Drying is water evaporating from the concrete. Concrete that dries out too fast can't cure properly, which is why fresh concrete is kept moist.
Concrete doesn't harden because it dries. It hardens because it cures. Keeping it moist in the first week is what builds a strong, durable surface.
Concrete Curing Timeline
First few hours: Nothing. Keep people, pets, and debris off while the concrete sets.
24 to 48 hours: Light foot traffic (early strength).
7 days: Drive and park regular passenger vehicles (about 70% of design strength).
28 days: Heavy vehicles like RVs and large trucks; apply sealer per the product's directions (specified design strength).
Timelines are typical for standard concrete in moderate weather. Your contractor may adjust them based on mix, thickness, and temperature.
How Long Before You Can Walk on New Concrete?
Wait at least 24 hours before walking on a freshly finished slab, and longer in cool weather. Keep it to light foot traffic only. No wheelbarrows, bikes, or dragging furniture.
How Long Before You Can Drive on a New Concrete Driveway?
Plan on 7 days before driving or parking a regular car on a new driveway. By then, concrete typically reaches about 70% of its design strength. For heavy vehicles, like RVs, loaded trucks, or delivery vehicles, wait at least 28 days.
A few extra tips for new driveways:
Avoid parking near the edges for the first month. Edges are the weakest point
Don't turn the steering wheel while stationary on fresh concrete
Ask contractors and moving companies to keep heavy equipment off until 28 days
Why Is 28 Days the Magic Number?
Concrete strength is specified and tested at 28 days. When a mix is called "32 MPa," it means it's designed to reach 32 megapascals of compressive strength at 28 days. Concrete keeps gaining some strength after that, but 28 days is the industry benchmark.
Learn more about strength ratings in Understanding Concrete Mix Strengths: MPa Explained.
How Does Weather Affect Concrete Curing in Ontario?
Cold weather slows hydration dramatically. Below about 10°C, curing slows down, and freezing fresh concrete can permanently damage it. Cold-weather pours need planning: insulated blankets, accelerators, or heated enclosures. See our guide on Best Practices for Pouring Ready-Mix Concrete in Winter.
Hot, dry, or windy weather pulls moisture out of the surface too fast. That can cause surface cracking and a weaker, dustier finish. Crews pour early in the day and use curing compounds, wet burlap, or plastic sheeting to hold moisture in.
Rain within the first few hours can damage the surface finish. Cover the slab if rain is expected shortly after the pour.
How Do You Cure Concrete Properly?
The goal is simple: keep the concrete moist and at a good temperature for at least the first 7 days. Common methods:
Curing compound: a liquid sprayed on after finishing that seals in moisture. Fast and common on driveways.
Wet curing: lightly misting the slab with water several times a day, or covering it with wet burlap.
Plastic sheeting: laid over the slab to trap moisture. Weigh down the edges.
Insulated blankets: for cool weather, to hold in heat as well as moisture.
When Should I Seal New Concrete?
Most sealers are applied after the concrete has cured, often around the 28-day mark, but always follow the sealer manufacturer's directions. For exterior flatwork in Ontario, the Cement Association of Canada recommends routine sealing, typically every 1 to 2 years, especially where de-icing salts are used.
Can I Use Salt on New Concrete?
Avoid de-icing chemicals on new concrete, especially during its first winter. Some salts can chemically damage the surface. Use sand or fine grit for traction instead.
Does the Concrete Mix Affect Curing Time?
Yes. The water-to-cement ratio, cement content, admixtures, and air entrainment all play a role. Adding extra water on site to make concrete easier to work weakens it and can lengthen curing time. That's why the mix should be right when it's made.
Bathurst Mobile Ready Mix uses volumetric trucks that mix concrete fresh on site, with materials metered at the truck. Your concrete is mixed when your crew is ready to place it, not hours earlier at a plant.
Frequently Asked Questions
How long does concrete take to cure?
Concrete is typically walkable in 24 to 48 hours, ready for cars in about 7 days, and reaches its specified design strength at 28 days.
How long before I can walk on new concrete?
Wait at least 24 hours before light foot traffic, and longer in cool weather.
How long before I can drive on a new concrete driveway?
Most passenger vehicles can drive on a new concrete driveway after about 7 days. Wait at least 28 days for heavy vehicles like RVs or loaded trucks.
Does concrete cure faster in hot weather?
It gains strength faster in warm weather, but hot, dry, or windy conditions can dry the surface too quickly and cause cracking. Keep the concrete moist during the first week.
Can concrete cure in cold weather?
Curing slows significantly in cold temperatures, and fresh concrete must not freeze. Cold-weather pours need protection such as insulated blankets or heated enclosures.
How long should concrete be kept moist?
The Cement Association of Canada recommends curing exterior flatwork for at least 7 days with adequate moisture and temperatures above 10°C.
When can I seal my new concrete driveway?
Most sealers are applied after the concrete has cured, often around 28 days. Always follow the sealer manufacturer's directions.
Can I put salt on a new concrete driveway?
Avoid de-icing salts, especially in the first winter. Use sand or fine grit instead.
Should I water new concrete?
Keeping new concrete moist during the first 7 days helps it cure properly. Lightly mist the surface or cover it with wet burlap or plastic sheeting. If a curing compound was sprayed on, follow the product directions and don't wash it off.
Why is my new concrete cracking?
Concrete shrinks slightly as it cures, so small hairline cracks are common. Control joints are cut so that cracking happens in straight, planned lines. Wider cracks are more often linked to a poor base, drying too fast, or loading the slab too early.
What happens if it rains on fresh concrete?
Heavy rain in the first few hours can wash out the surface and leave it weak or pitted. Once the concrete has set, rain generally won't harm it and can even help keep it moist. Cover the slab with plastic if rain is expected right after the pour.
Can I pour concrete in the fall in Ontario?
Yes. Fall is a good season for pouring as long as the concrete is protected from freezing during curing. Watch overnight lows, and plan for insulated blankets when temperatures drop near freezing.
Planning a Pour?
Get fresh concrete mixed on site, measured to the job, and delivered across Toronto, Scarborough, Markham, Aurora, Oshawa, and the GTA.
Call 416-656-1937 or email admin@bathurstreadymix.ca for a quote.
Related reading: Exposed Aggregate Concrete: The Complete Guide · How Much Concrete Do I Need? · Best Practices for Pouring Ready-Mix Concrete in Winter · Understanding Concrete Mix Strengths: MPa Explained