Cracks in concrete floor.

My question is what would be the best method to fill and hide these cracks. I thought about using a cement filler then painting the entire floor with a epoxy paint but don't know how durable and long lasting this would be.

Thanks for any and all advise.

They didn't pour any type of grade beams before pouring the slab but it certainly sounds like good insurance.

The soil below the slab is excellent with a very good perk rate. I know because I have a full 8' foundation on the back wall that steps up to 4' below grade on the front wall because of the slope on which the garage was built.

The contractor that poured the slab has done others for me and I was always satisfied with his work. He did tell me these spider web cracks have been occuring on other jobs and he was suspect to the quality of the portland cement the plant was using.

I really don't know what caused this much cracking but I did notice that when they were placing the concrete some of it didn't appear to be thoughly mixed. I live pretty close to the concrete plant and perhaps the concrete wasn't in the truck long enough to mix.

At any rate, it is to late to cry about it now and the cracks are mostly cosmetic with the largest one being about 1/8" in width. The concrete filler in the caulking gun sounds like a good way to go with a couple coats of epoxy paint on top.

They make a patching compound for exactly this purpose; see your dealer. I've used both epoxy and polyurethane paints over concrete with excellent results. Both are pricey, require perfect surface preparation, and take some time to apply. Neither will prevent future cracks. They tend to make the floor slippery unless you mix in some special sharp sand with the paint.

I know it's too late but next time, use air-entrained, fiber reinforced concrete. Pricey but won't crack, even without rebar.