Porous Pave permeable paving product uses 1/8- to 1/4-in. recycled rubber chips in its surfacing material. The small, fine-cut chips provide a refined, smooth paved surface. The flexible, pour-in-place product has an XL formulation consisting of 50% rubber chips and 50% stone aggregate with a moisture-cured liquid binder. An XLS formulation contains 100% rubber chips.