Average Hourly Cost: The average cost of marble wall sealing by a marble contractor in 2023 is $50 - $100 per hour. The exact cost will depend on the complexity of the job and the type and quality of the materials used.

Cost Breakdown: The cost of marble wall sealing may include the cost of materials such as sealant, primer, and grout, as well as the labor cost for applying the sealant and cleaning up afterwards. Depending on the complexity of the job, the cost may also include additional materials such as backer boards, caulk, and adhesive.

Factors Affecting Cost: Several factors can affect the cost of marble wall sealing, including the type and quality of the materials used, the complexity of the job, and the location and service provider. The cost of materials may vary depending on the quality and quantity needed, while the complexity of the job may affect the labor cost. Finally, the cost may be higher if the service provider is located in an area with a higher cost of living.