ARDEX IS ONE OF THE PRODUCTS I KNOW ABOUT BUT THERE ARE PROBABLY MORE. IF YOU PAID FOR A FLAT FLOOR YOU SHOULD GET A FLAT FLOOR! AT NO FURTHER COST TO YOU!! YOU COULD GRIND OFF THE HIGH SPOTS, OR NOT AND APPLY THIS ARDEX. IT'S WHAT EVER YOUR CONCRETE GUY WANTS TO DO TO FIX "HIS" PROBLEM !