Best For: Driveways, pathways, patios, dog runs, and drainage Slightly larger than pea gravel, river rock is a smooth sedimentary, igneous, or metamorphic rock that comes from rivers and creeks.

so it works for pea gravel but less so for larger gravels like river rock. You also want to ensure that your glue will still allow your driveway to be permeable, as you want water to be able to ...