Users of iOS devices such as the iPhone or the iPad now have a convenient way to estimate the amount of Roadware 10 Minute Concrete Mender™ needed to repair a concrete crack, joint or spall.  Since Concrete Mender may be extended with sand at a ratio of two parts sand to one part liquid, estimating product usage is more challenging. The Roadware App eliminates the guesswork and gives users an estimated usage in 600ml cartridges and gallons of material. Sand ratios can be adjusted from none, 2:1 and 3:1 for special applications. An internet connection is not necessary when using the App so you can make an estimate from anywhere.