Mill crack or joint with an approved milling machine to the specified width and depth. Mill, saw cut and jack hammer pothole; or core and jack hammer to remove defective areas. Clean and dry the repair with a hot air lance. Treat recessed areas and vertical walls with a primer agent to promote adhesion and prevent moisture intrusion (for concrete applications only).
Heat CrackMaster Mastic Gray material in a thermostatically controlled, purpose-built mixer, with an agitator that ensures complete mixing. Once the material reaches approximately 300 to 320 °F (149 to 160 °C), pour molten CrackMaster Mastic Gray into the prepared area, sealing the bottom of the repair from water intrusion.
If the depth of the repair exceeds 1 inch, the remainder of the repair process will consist of layering coarse, hot angular aggregate (cleaned and dried) at a rate of 25% – 55% by volume with the molten CrackMaster Mastic Gray until within ¾-inch of the top of the repair. The bulking aggregate must be worked into the patch completely. Depth limitations are ¾-inch to full depth. NO DRY LAYERS OF BULKING AGGREGATE WILL BE ALLOWED.
The final ¾-inch of the repair will be CrackMaster Mastic Gray material for optimum flexibility of the repair. Once the top layer has been screeded to a level grade, a high PSV aggregate will be applied to the top of the repair to ensure proper skid resistance. Depending on the depth of the repair, CrackMaster Mastic Gray will be ready for traffic return between 30 and 60 minutes.