Gator Aqua Rock is manufactured to meet ASTM No. 9 requirements for permeable paver joint units. The calibrated gradation obtained from the fractured high-strength granite makes it the ideal product for the bedding course and jointing material to collect surface water run-off and help stabilize interlocking paver surfaces. It helps collect roof and surface water run-off and reduce the rate of stormwater off driveways, parking lots, patios, and more for residential and commercial use. Gator Aqua Rock offers long-term infiltration performance. The minimum slope of the finished pavement surface should be 1%. The surface of the pavers may be 1/8 to 1/4 in. (3 to 6 mm.) above the final elevations after compaction. This helps compensate for possible minor settling normal to pavement.