It's good that the service explains upfront what determines the final appearance after washing and sealing: my quality has been consistent season after season, and I based my budget on the cost to seal paver driveway, where the price is influenced by the area, the condition of the joints, and the type of sealant. For a brick patio, a gentle approach— cleaning brick patio with power washer —gently removes moss and grime without disturbing the grit in the joints. Has anyone compared the results of a matte and a "wet" sealant—which looks fresher longer?