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Old 08-28-2019, 10:08 PM
greif greif is offline
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Default Concrete crack filler



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Anyone know of a thin concrete crack filler? Have some thin /narrow cracks so would like a pourable filler maybe epoxy like to fill cracks in concrete
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Old 08-28-2019, 10:32 PM
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There are any number of fillers. Google is your friend.

What kind of application? Exposed to weather? High traffic? Frost heave?
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Old 08-30-2019, 11:22 AM
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Quote:
Originally Posted by AZ_HighCountry View Post
There are any number of fillers. Google is your friend.

What kind of application? Exposed to weather? High traffic? Frost heave?
I also have the same issue. Is it a good idea to drill a small hole at the ends of cracks to stop them??? Would cyanoacrylate make a good stabilizer??? Thanks.
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Old 08-30-2019, 11:25 AM
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https://www.consumermentor.com/best-epoxy-grout/

Epoxy grout if you can get it into the crack.
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Old 08-30-2019, 03:19 PM
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Professionals drill holes through the slab and fill with expanding foam. After they fix the root cause, they use an epoxy filler. Fix the problem first.. if it's just run-off causing channels under the concrete, easy fix. If it's tree roots, bigger issue.
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Old 08-30-2019, 05:03 PM
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If it's a slab crack inside your home or garage, the best filler I've found is from Rust-Oleum.

Rust-Oleum Concrete Patch & Repair

It's a 2-part epoxy. There are no noxious fumes as with some epoxies. It settles into the crack, so don't mix is all up at once if you want a smooth patch. You can recover a settled patch within 2 hours. It took 3 applications when I used it on a 1/4 inch slab crack. You can use a belt sander on it the next day if you wish.

This stuff is very easy to work with.
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Old 08-31-2019, 05:03 PM
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Thin cracks in exterior concrete walls are generally (and correctly) filled with bathroom caulk.

Such cracking is a common problem in Florida. As the ground settles a little and the concrete block walls crack. Structural integrity is not affected, as rebar and spaced, vertical poured concrete sections tie the roof to the slab.
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Old 08-31-2019, 08:30 PM
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Any filler will fail and look worse than the original crack.
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Old 08-31-2019, 10:03 PM
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Just get some tubes of Sikaflex self leveling concrete crack filler from the home center.

Put on a thick bead and and give it time to sink down the crack. Then run a putty knife along the crack a half hour later to scrape up the remainder. Repeat as often as needed over the next few days until the crack seals up. Finally clean up the leftover material on the edges a brass wire brush and some acetone.

That will fill the crack, reduce tripping hazard, stop seepage, and keep it from spreading too much.

But don't expect it to make the crack disappear like you are putting spackle and paint on a wall.

You can't ever match the look of weather exposed concrete.
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Old 09-01-2019, 10:21 AM
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Back when I was younger, I had a swimming pool company. We used to use a product called DeckOSeal to put in the joint around a pool. One of it's main benefits is that it is flexible...most concrete patch products will just crack again if there is any movement present......just based on my experience...
https://www.deckoseal.com/04/11/deck...joint-sealant/
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Old 09-01-2019, 12:35 PM
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Quote:
Originally Posted by alv7722 View Post
I also have the same issue. Is it a good idea to drill a small hole at the ends of cracks to stop them??? Would cyanoacrylate make a good stabilizer??? Thanks.
Holes drilled at the ends will relieve the stresses and stop them from propagating.

I had a diagonal crack in my slab at the very corner of a wall. I drilled the crack. I cleaned it out entirely and used 2 part concrete epoxy from a gun and filled the void. Applied sand over the wet surface for cosmetic purposes.
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Old 09-01-2019, 12:40 PM
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Quote:
Originally Posted by hoodoo View Post
Back when I was younger, I had a swimming pool company. We used to use a product called DeckOSeal to put in the joint around a pool. One of it's main benefits is that it is flexible...most concrete patch products will just crack again if there is any movement present......just based on my experience...
https://www.deckoseal.com/04/11/deck...joint-sealant/
I had a concrete guy use that very product around my concrete pool where it met the cool deck. The deck expands and contracts with heat and cold so anything solid will eventually break away. He ground out all of the old grout around the pool and then used foam backing rod behind the void to contain the sealer. Otherwise it would just mix and be wasted with sand and soil behind. It was painted to match the cool deck.
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Old 09-07-2019, 07:18 PM
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The Sikaflex self leveling looks good, cracks are less then 1/16 th wide.
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Old 09-07-2019, 07:51 PM
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Some good options here, gonna try a few that are mentioned.
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