Sure do. The seal do wear down overtime, often due to foot traffic, from the tire of the vheical, or general wear and tear. Re-sealing every year is recommanded. If you do not re-seal it, the glossyness will eventually be wear down to expose the original paver finish. For a simplier solution, many pavers comes pre-seal. A factory is often more low-maintenace compare to a sealing process done after the paver has been installed