A bonding agent which provides enhanced adhension, workability and curing of cementitous overlays. Packaged in 1-gallon (3.8L) plastic bottles of concentrate, dilute 1 gallon of primer with 1 gallon of water. At diluted strength the coverage is approximately 200 square feet per gallon, but varies with surface conditions. A second application is recommended. Required bonding agent for use with T1000™ Stampable Overlay, Microcem, T1000™ Fine Overlay , and Cantera™ Vertical Overlay.