Sandstone Paving Slabs Need Sealing? Yes or No

Whether sandstone paving needs sealing, our recommendations are as follows:

Sealing protects the sandstone by filling its pores to prevent liquid intrusion and reduce staining.

For Natural Face Sandstone Paving (Split Riven):

We recommend not sealing. Color changes over time will not affect the overall aesthetic, as these changes are a natural characteristic of the natural stone and can add unique charm.

For Smooth Sandstone Paving (Rough Polished Honed):

We recommend sealing. Sandstone has larger pores and a higher water absorption rate. Sealing helps maintain consistent color and protects against staining, cement penetration, and other contaminants from the bottom and sides of smooth sandstone paving slabs. It also preserves the smooth sandstone’s appearance and extends its longevity, offering extra protection, especially if the installation quality is not highly professional.

Typically, customers who prefer smooth sandstone paving are very concerned about the consistency of the paving color. Therefore, maintaining long-term color consistency is a key focus in the installation process.

How to Seal Sandstone Paving

1. Clean the Paving

   • Remove Dirt and Debris: Sweep the surface to remove loose dirt and debris.
   • Deep Clean: Use a suitable stone cleaner to thoroughly clean the sandstone. Ensure that all residues, such as dirt or old sealant, are completely removed. Allow the surface to dry completely before proceeding.

2. Choose the Right Sealer

   • Type of Sealer: Select a sealer suitable for sandstone. There are two main types:
     • Invisible Sealers: These protect without altering the appearance of the stone.
     • Color Enhancing Sealers: These can deepen the color of the sandstone while providing protection.

3. Prepare the Area

   • Weather Conditions: Ensure the weather is dry with no rain forecast for at least 24 hours. Sealing should be done in a well-ventilated area.

4. Apply the Sealer

   • Application: Use a brush, roller, or sprayer to apply the sealer evenly over the sandstone. Work in small sections to ensure complete coverage.
   • Follow Instructions: Refer to the sealer manufacturer’s instructions for the best application technique and recommended number of coats. Typically, a second coat may be needed for optimal protection.

5. Allow to Dry

   • Drying Time: Allow the sealer to dry completely. This usually takes 24 hours, but check the product label for specific drying times.
   • Avoid Traffic: Do not walk on or place objects on the sealed surface until it is fully cured.

6. Regular Maintenance

   • Reapply as Needed: Depending on the sealer and usage, reapply the sealer every 1-3 years to maintain protection.
   • Clean Carefully: Use appropriate cleaning products to avoid damaging the sealant and the sandstone.

By following these steps, you can help ensure that your sandstone paving remains beautiful and protected for years to come.