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Magic Crack Filler

4.2 4.2 out of 5 stars 79 ratings
Color Concrete Grey
Brand Trim-A-Slab
Item Weight 10 Pounds
Item Form Powder
Material Other

About this item

  • Do it yourself
  • Installs easily
  • Matches Concrete, dry powder, no mess, no shelf life, quick, easy and DIY

Product details

  • Is Discontinued By Manufacturer ‏ : ‎ No
  • Product Dimensions ‏ : ‎ 8 x 2 x 8 inches; 10 Pounds
  • Item model number ‏ : ‎ 3417
  • Date First Available ‏ : ‎ January 26, 2016
  • Manufacturer ‏ : ‎ R & D Workshop, LLC
  • ASIN ‏ : ‎ B07N8HT795
  • Customer Reviews:
    4.2 4.2 out of 5 stars 79 ratings

Product Description

Magic Crack Filler is an extremely fine dry powder that is used to fill hairline cracks in mortar and concrete.

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Customer reviews

4.2 out of 5 stars
4.2 out of 5
79 global ratings
Far exceeded my expectations
5 Stars
Far exceeded my expectations
Hairline crack formed a few months after our new driveway was poured, gave this product a try and was amazedBefore photo is from about 6 months prior to the repair. After photos are 24 hours after the repairEasy to use, took all of 2 minutes. Obviously my crack was the perfect size and the color was on par. Time will tell if this stuff will hold up over the winter (northern indiana)
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Top reviews from the United States

Melissa B.
5.0 out of 5 stars Works for hairline cracks
Reviewed in the United States on September 18, 2023
Verified Purchase
I experimented with using this product in different widths and depths of cracks in my concrete patio and walkways. This works as intended on narrow hairline cracks. Anything wider or deeper than a hairline, it sinks down and hardens somewhat, but the bond is weaker and stays "sandy" on the surface. For those areas, I'm going to leave as much of the product as possible in place and use it as a base layer for a liquid masonry crack filler.
7 people found this helpful
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Amazon Customer
4.0 out of 5 stars So far, interesting product.
Reviewed in the United States on December 1, 2022
Verified Purchase
Curious to see how it holds up. It does make some cracks blend it betterthan an open crack. Super easy to use!
6 people found this helpful
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guy c
5.0 out of 5 stars It works
Reviewed in the United States on December 9, 2022
Verified Purchase
Use as directed it works. I have a front porch that has large slate rectangular and square. The tile was separating from the concrete. My desire was to fill the cracks before winter so water doesn't get in and make it worse or break during winter when I cannot fix properly. I used the powder, I did mask the areas with tape and masking paper to ensure no discoloration on the slate/cement etc. After the install of the powder, you cut the tip (small) go to the space and gently tap the tip on the area that needs it and the powder will come out slowly so you can fill the area and move accordingly. I had one that was on an edge, I put tape along the side and filled the void 1/16-1/8" and lightly sprayed with water and it is holding firm for 2 months. I don't review anything right away unless it sucks right away.
12 people found this helpful
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Georges Harned
5.0 out of 5 stars Its Magic...Not sure its worth the money but it sure does work
Reviewed in the United States on August 7, 2023
Verified Purchase
Its Magic...Not sure its worth the money but it sure does work (Might as well find the same stuff at a hardware store)
2 people found this helpful
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Tom Lucini
5.0 out of 5 stars Great stuff
Reviewed in the United States on June 7, 2023
Verified Purchase
Easy to use
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Nashville Hunter
1.0 out of 5 stars Awful. Avoid for concrete repair.
Reviewed in the United States on September 24, 2019
This product is awful. I have a brand new driveway (installed three weeks ago) that unfortunately, developed two hairline cracks immediately after pouring. I bought this product hoping it was an alternative to the liquid crack filler available at big box stores. Here are the issues I experienced:
—It shrinks after application causing small voids that could easily be penetrated by water
—One container is barely enough to do a hairline crack that runs the width of a 10ft driveway
—the material isn’t easy to apply. It might go easy into hairline cracks, but carefully removing excess material with a broom causes the filler to be at a lower point than the concrete.

My recommendation: go with a product you can buy at a big box store so if it doesn’t work, you can return it for a refund. I would have been better off just buying a bag of topcoat powder and using it in the cracks.

I’m in TN and we have yet to have any rain for the last four week if you’re curious if rain caused any of these issue.

I ordered directly from the seller’s website.
26 people found this helpful
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Steve
5.0 out of 5 stars Fix your cracks
Reviewed in the United States on May 22, 2021
Verified Purchase
Very easy to use, made very nice looking repairs to pool deck and driveway cracks.
6 people found this helpful
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Michael J.
2.0 out of 5 stars Very small container
Reviewed in the United States on February 18, 2024
Verified Purchase
Wow. I guess 11 oz isn’t very much. That’s an issue with mail order. FYI, the container is only the size of a small mustard squeeze bottle. For $23 bucks (incl shipping), I expected much more. Won’t be buying this again.
2 people found this helpful
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