Mobile estimator to determine the amount of Roadware 10 Minute Concrete Mender or Flexible Cement II (set to no sand) needed to repair cracks and spalls in concrete slabs. The estimator program is based on mathematical calculations and will give a rough estimate in 300x300ml cartridges or gallons needed to repair a crack or spall. Roadware 10 Minute Concrete Mender is a two-part polyurethane that penetrates deep into concrete to make permanent repairs. At only 8.6 cps, 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 and Microdowles into the concrete.