Floorpro, QT, #564, self leveling primer, prepares the cleaned surface, improves the bond, & helps prevent pinholes & buddle's in the finished surface, floorpro primer is required as part of the 565 floorpro self leveling installation system, coverage 100 to 150 soft per QT, drying time approximately 3 to 24 hours. This product adds a great value. Product is highly durable and very easy to use. This product is manufactured in United States.