Need help for product selection and preparation

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stanigator

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See attached photos for what I'm trying to patch up (the gaps appears to be too big to be fixed by a crack sealant economically).

The selection is quite overwhelming. Which of the following product would you recommend using?

(1) https://www.homedepot.ca/en/home/p.epoxy-shield-concrete-patch.1000522539.html
(2) https://www.homedepot.ca/en/home/p.concrete-patching-compound-095l.1000684674.html
(3) https://www.homedepot.ca/en/home/p.grey-concrete-crack-seal-946ml.1000142883.html
(4) https://www.homedepot.ca/en/home/p.38l-gray-bondex-concrete-patch-rtu.1000104552.html
(5) https://www.homedepot.ca/en/home/p.anchoring-cement-45kg.1000183098.html
(6) https://www.homedepot.ca/en/home/p.mix-and-go.1000682025.html
(7) none of the above; other

In addition, in order to properly patch over these cracks, do I need to remove the top part of the old concrete patch (using a chisel or jackhammer), or can I apply the patching material directly on top of the old patch after removing all the dirt?

Thanks in advance for your help.

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If those are the control joints, i would recommend the self leveling concrete caulk. I would do the same where the sidewalk meets the stairs. Any concrete product is not flexible and will likely just crack again.
 
typically apron/vest stores only carry the 'ns' version (non-sag/vertical) which means you'll need to 'tool' the mtl against the sidewalls,,, teaspoon & wtr work fine,,, pay attn to jnt depth:width ratio per mfg's instructions,,, be certain sidewalls are CLEAN,,, IF you can find the 'sl' (self-leveling) version, no tooling rqd,,, you'll need backer rod - either open or closed cell works fine
 
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