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Is there a substance i could use that would harden the surface of concrete enough to make it resist scratching by steel?

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  • $\begingroup$ It depends on the( Force/square inch) and to some degree the hardness of the steel and the hardness of concrete aggregate, $\endgroup$
    – blacksmith37
    Apr 28, 2022 at 15:10

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I suggest exploring the "Dry Shake Hardeners" produced by Sika, which I consider the leader/best in cement products. https://www.sika.com/en/knowledge-hub/dry-shake-hardeners-for-concrete-floors.html#Abrasion

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