Yes, it's a good idea to clean your pavers before sealing them. Power washing patio pavers or driveway pavers are the best way to do this, but you can also use a pressure washer. Be sure to remove all the dirt, dust, and debris from the surface of the pavers before sealing them. This will help ensure that the sealant penetrates the surface of the pavers and provides maximum protection.
This answer was provided by paver sealing experts, Stingray Sealing Services in Sarasota, FL.