Your concrete driveway is strong and durable and, if maintained, will give you many years of service. When occasional hairline cracks occur, a simple repair will get your driveway looking good and prevent the crack from becoming larger. To repair a hairline crack, you won’t need any special equipment, just use a few supplies that you pick up at your local hardware store.
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Using Masonry Crack Filler1
Clean the crack of all debris — dirt, particles of concrete, or pebbles. Use a vacuum cleaner or soft brush after you’ve cleaned out larger particles with a wire brush. Be sure to follow the manufacturer’s directions when squeeze the patch into the crack. If the crack is deep, fill the crack.
Remove loose debris from the crack, using a wire brush. Sweep up any surface debris, using a broom. Alternatively, blow it out with an air compressor. Clear debris from a small hairline crack, using canned air.
2
Insert a tube of masonry crack filler into a caulking gun. Inject the crack filler along the hairline crack. Apply the crack filler to a dry surface.
3
Smooth excess crack filler with the straight edge of a putty knife to create an even surface.
Using Concrete Patching Compound1
Clean debris from the crack in the same manner as when using masonry crack filler. Dampen the crack by spraying it with a garden hose.
2
Mix vinyl concrete patching compound with water in a bucket, according to the directions on the package.
3
Press the mixture into the crack with the pointed tip of a trowel. Fill the crack until it is even with the driveway surface. Use the flat bottom of the trowel to blend the patching compound with the surrounding driveway surface.
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References (3)About the Author
Michele Norfleet is a freelance writer who writes on travel, home and garden and education topics. She has coauthored a handbook for teachers on school-wide discipline and has contributed tips for special-needs students in the basal curriculum for RCL Benziger. Norfleet holds a master's degree from Southern Illinois University and has experience as a special-needs teacher and speech pathologist.
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Hairline Crack FillerChoose Citation Style
Norfleet, Michele. 'How to Repair a Hairline Crack in a Concrete Driveway.' Home Guides | SF Gate, http://homeguides.sfgate.com/repair-hairline-crack-concrete-driveway-92337.html. Accessed 09 October 2019.
Norfleet, Michele. (n.d.). How to Repair a Hairline Crack in a Concrete Driveway. Home Guides | SF Gate. Retrieved from http://homeguides.sfgate.com/repair-hairline-crack-concrete-driveway-92337.html
Norfleet, Michele. 'How to Repair a Hairline Crack in a Concrete Driveway' accessed October 09, 2019. http://homeguides.sfgate.com/repair-hairline-crack-concrete-driveway-92337.html
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It’s a given that a concrete slab will develop cracks over time. This is particularly true at cold joints, where two concrete slabs meet that were poured at different times.
If the concrete slab is outdoors, such as a driveway, the cracks need to be sealed properly to keep water from seeping under the slab and eroding the soil, which can cause the concrete to settle.
To seal crack in a concrete slab:
Watch this video to find out more.
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VIDEO TRANSCRIPT
Concrete driveways require a lot less maintenance. You want to keep them nice and clean. But more importantly, you want to be sure you fill up any cracks you might have, especially a crack like this. Now, this is called a cold joint, where this slab and this slab were poured at different times. And no matter what you do, it’s going to crack.
Now, here’s what’s important about sealing that crack up, is that if you allow rain to get in this crack, sooner or later it’s going to affect the integrity of the soil below it. This will start settling and cracking, I’ve seen it a hundred times.
Here’s all you have to do is take a screwdriver, and just kind of scratch away at any debris you may have in the crack. Then, a wire brush to really clean it up really well. And then use a whisk broom. Or, I’ll tell you what, a leaf blower works really well on this as well.
Then, the important thing is a concrete repair caulk, this particular one is a self-leveling. And on a crack like this, you basically are just filling it in, and making it nice and flat.
Now, that works well on a crack like this. But if you have a crack that’s a little larger – for some reason on this side, it’s a little larger than on that side – you’ll need this extra step.
It’s a backer rod, and you use this anytime you’re caulking anything on the outside of your house that’s larger than say a quarter inch or three-eighths. And here, I’m going to put it down in the crack, like that. Screwdriver, push it down about a half-inch. Then, I’ll caulk right over it, just like I did the smaller crack.
Danny Lipford is among the country’s most sought-after home improvement experts. The seasoned remodeling contractor and media personality served as the home improvement expert for CBS’s “The Early Show” and The Weather Channel for over a decade and has made more than 180 national television appearances on “Fox & Friends,” “Inside Edition,” “Morning Express with Robin Meade,” Fox Business Channel, Rachael Ray and more. He travels the country making appearances as a brand ambassador and spokesperson, and each year contributes expertise to hundreds of popular magazines and online media outlets. Chelsea Lipford Wolf is a born-and-raised home enthusiast, adding her crafty skills and passion for DIY as co-host of the top-rated, nationally syndicated “Today’s Homeowner” TV show. Seal Hairline Cracks In Concrete
In addition, Chelsea maintains her own home lifestyle and décor blog and award-winning web-series, “Checking in with Chelsea.”
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We recommend submitting questions involving unique situations like yours to the Today’s Homeowner Radio Show. Please use this form to contact Danny Lipford, America’s Home Expert, directly: https://todayshomeowner.com/radio/ask-questions/ Take care! Comments are closed.
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