How do I make concrete floor less slippery?

Marylou Murdock
by Marylou Murdock
I had a concrete porch with stamped concrete built, but it is very slippery and have had a couple of friends fall. I did have the company come back and put a sealer with "grit" in it down but it is still pretty slippery. Does anyone have an idea as to how to fix this issue???
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