ARDEX MC™ PLUS Moisture Control System – A two-coat, 100 percent solid epoxy moisture control system formulated to suppress moisture vapor emissions in new or existing concrete prior to the installation of ARDEX Americas Underlayments. The ARDEX MC PLUS system is based on a reactive epoxy that produces a hard surface and bonds tenaciously to the substrate. There are two components: the ARDEX MC™ PLUS PRIMER, which is red in color and is installed as the base coat, and the ARDEX MC™ PLUS SEALER, which is dark green in color and serves as the sealer coat. After sufficient drying, the surface of the system is then primed prior to installing the selected ARDEX Americas underlayments and then the final finish flooring. Once cured, this two-coat system reduces any level of moisture emissions to an acceptable level, even over new concrete that is only 7 days old. No sand broadcast is necessary for underlayment layers of 1/4” (6 mm) thick or less.