ARDEX PC-T Polished Concrete Topping hardens fast, and can be walked on in two hours and polished in 24. It mixes with water and can be pumped or poured, installing from 3/8 in. to 2 in. and up to 5 in. with aggregate. Available in white, gray, and light gray, it can be integrally colored with the company’s water-based PC Color-Dye, available in eight colors. ARDEX Americas.