How to fix cracks in the concrete by the steps (pic)?

Looks to me like that isnt a crack but separation of two layers. Cold chisel off layer. "Key" out crack. Patch with vinyl additive mix. Ignore Kathy, that's hogwash

Menards, Lowes and Home Depot all carry a crack fixer.

Home Depot has a concrete skim cover.

I would use a cold chisel and hammer to open up the crack more and then either use concrete caulk of a liquid concrete filler.

Separation on stairs from slab. Slab is sinking. Looks like there was a patch job o the slab and where the slab and crack meet. Chisel away any of the cement around the crack. Fill the crack with concrete mortar repair in caulk tube. Needs to be flexible since the walk slab is sinking.

William, you're right. My apologies. I'll say if OP wants it done right, anything that comes in a tube will not only look bad but *will* ultimately fail.

I would first investigate the drainage issue that caused this. Extending all downspouts 6' or more away and downhill from home should suffice, but leaving the root of the issue unchecked is asking for further problems.

After that, use a wire brush and angle grinder (or manually) and scour the entire area and surrounding.

Key out crack with cold chisel to 1/4"

Vacuum area

Wet area down to *Field capacity* Otherwise you will not achieve a proper bond with patch

Apply the patch with vinyl additive. Get the dry stuff and only mix enough water to spread as needed. More water=more weak.

Unless OP fixes the drainage issue, again, nothing will work. Start there. And again, don't forget to wet the area down. That's very important.

Hope this makes up for the snide remark, good luck

Hi Bea, You can fill wide cracks with concrete crack filler in a caulk tube. Then you can resurface the slab.

https://www.quikrete.com/athome/video-resurfacing-concrete-slabs.asp