How do you fix cracked concrete garage floors?
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Lgh14102410
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I have large cracks in my concrete garage floor. I don't want to spend a fortune to dig up and repour my floors. What can I use to fill the cracks? Thanks, Peggy 
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I have the same problem.
Ace or Home Depot carry those products that can patch concrete. You need to check the foundation to make sure you don't have any roots growing under your slab, causing your concrete to crack and separate.
Home Depot, Lowes, and Menards have latex modified concrete patch.
Try cement leveler: check out these answers from a similar discussion: http://www.hometalk.com/diy/repair/home-exterior/q-how-can-i-salvage-a-crumbling-cracked-24x24-triangle-shaped-concrete-patio-without-184803
How can I salvage a crumbling, cracked 24x24" triangle shaped concrete patio without tearing it out?
There is a crack filler I think it's called epoxy for concrete floors- it's grey. We've used it. It works. Sorry I don't remember where we got it.
fix the cause of the crack if you can, so it can't come back. then patch/ fill in cracks. the concrete patio on the uphill side of my house was letting water in under the door frame. i was able to find a really runny caulking substance...to get into the 1/8 inch crack. no more wet basement.