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 Menderâ¢ is a two-part polyurethane that penetrates deep into concrete to make permanent repairs. Nearly thin as water at less than 9cps, Concrete Menderâ¢ actually injects itself into the matrix of the concrete and shores up the existing concrete as well as making the repair. Concrete Menderâ¢ eliminates the bond-line as it Microdowels into the concrete. We call it Microdowlingâ¢. A dual cartridge gun is required to use this material.