Now you can repair cracks and spalls to a smooth finish in a fraction of the time it takes with ordinary products. Roadware 10 Minute Concrete Mender is an evolutionary two-part hybrid urethane for repairing concrete. Its nearly water thin for deep penetration and it wont pop out like epoxy because it never gets brittle. Roadware 10 Minute Conrcete Mender is a two-part polyurethane that penetrates deep into concrete to make permanent repairs. Nearly thin as water at less than 9cps, Concrete Mender actually injects itself into the matrix of the concrete and shores up the existing concrete as well as making the repair. Concrete Mender eliminates the bond-line as it Microdowels into the concrete. We call it Microdowling. A dual cartridge gun is required to use this material.