I find concrete sealers are super quick to apply. Just clear the concrete, Permit it dry, then use the sealer that has a mop. It received’t change the shade with the concrete, but will darken it somewhat and increase some gloss. You’ll ought to reapply it every year or so https://mcgepoxycoatings.com/epoxy-vs-untreated-concrete-garage-flooring-which-one-is-best/