Paving stone driveway installed by Gappsi in 2008, got refurbished with the cleaning and sealing process. Using low pressure hot water the pavers surface gets clean uniformly with no impact of wear on the stone surface. The joints in between the pavers got filled with high quality polymeric sand and vibrated with heavy mechanical plate compactor with rubber rolling system to prevent pavers from getting scratched or damaged. To learn more about Gappsi products, please contact us at 631-543-1177 or visit our web site at www.gappsi.com