Per the ICPI recommendations of a permeable paver system, WetLok should not be used for permeable paver installations although it is a permeable material. With minimal use and typical contaminants found on a project (Dirt, Dust, Debris, and Pollen), WetLok Jointing Sand would quickly fall below the infiltration rate that is required for a properly functioning Permeable Paver installation. Since the maintenance of the Wetlok Jointing sand is to Pressure Wash the Joints to remove debris, it is likely that within a season or two the contaminants would reduce infiltration rates to a point that the permeable system would not work as designed.