Ardex Engineered Cements introduces Ardex K 301 exterior self-leveling concrete topping and underlayment. K 301 is a Portland cement-based product aimed for “fast-track resurfacing and smoothing of concrete – on, above or below grade,” Ardex says. The product is engineered to set quickly and can be walked on in 2 to 3 hours, the company notes.For details, circle 265 on the Reader Inquiry Card.