It is a monocomponent polyurethane consolidation primer. Not only does it seal and seal the substrate like acrylic sealants, but it also provides a tremendous final hardness to the entire system (the harder the base, the harder the final finish). It has a fast drying time that allows you to apply polyurethane finishes in less time than with conventional acrylics. In addition, it is notable for the low or no discoloration of the microcement. Volume: 5L