Once the pavers are completely clean they will be ready to start the sanding process. We use a 20/40 grain Silica Sand. This special sand is made to fill in the joints, cracks and voids on the surface. This sand is also made to bond with our sealers, to help protect your paver joints from weeds, algae, and ants. We use water to wash the sand into the joints to fill any holes beneath that cannot be seen. This compacts the sand to help prevent wash outs.