This calculator is provided so you can estimate the quantity of material needed for your project. When evaluating crack sealing on asphalt you need to consider not only the width and depth of the crack but also the width of the overband and its thickness. Joint sealing in concrete seldom has an overband so the value for Overband Width and thickness should be set to 0. If you are estimating GAP Mastic or GAP Patch, you need to consider not only the width and depth of the wide crack but also the width and depth of the overband, which is usually larger on a wide crack repair. If you have any questions please contact us for assistance.