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1

How big are the joints? If they are small, use the polymer sand swept in. If they are larger use a masons grout bag to fill with regular masonry cement.


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You can use cement based grout. Cement based has been used long prior to polymer grouts. I haven’t used polymer or epoxy grouts outside but they work great in the bathroom. I have used addmix in my grout but I also use this in my mortar.


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