LATICRETE VAPOR BAN™ Primer ER is a single-coat, 100% solids, liquid applied 2-part epoxy coating specifically designed for controlling the moisture vapor emission rate from new or existing concrete slabs. This product also requires minimal to no surface preparation! It consolidates the application of a moisture barrier and primer from two steps into one! It will also perform as an epoxy primer for concrete prior to installing self leveling underlayment products such as NXT Level and LATICRETE® SUPERCAP®.