How to Seal Paving Stones

Seal paving stones to protect them from wear and tear.

Sealing paving stones used in outdoor projects is important for maintaining appearance and increasing the durability of the surfaces. Sealing increases durability by protecting the paving stones from the elements as well as substances like salt and oil. Sealers can be purchased in a variety of finishes ranging from matte to glossy.

Things You'll Need

• Stiff bristle broom
• Paint sprayer, roller, brush or sponge
• Plastic wrap
• Duct tape
• Degreasing/etching compound
• Concrete sealing compound

Instructions

1. Sprinkle a few drops of water on the surface of some of the paving stones to test for porosity. If the water drops soak into the concrete, the paving stones are ready for sealing. Cover the stones with plastic wrap overnight, taped in place with duct tape. If beads of moisture appear on the underside of the plastic wrap, that indicates that the concrete has too high a moisture content for sealing to be effective.

2. Clean the paving stones of any dirt, oil or grease.

3. Apply a combination concrete degreasing and etching compound. Apply the product with a non-metal sprinkling can, scrub the stones with a stiff bristle broom and then rinse with a garden hose. Allow the paving stones to dry thoroughly.

4. Apply the sealer to the paving stones with a paint sprayer, paint roller, paint brush or sponge. Allow four hours for the sealer to dry, then apply another coat. Apply several coats, allowing each to dry before adding another.

Tips & Warnings

• Use gloves and eye protection while applying masonry sealants. Avoid skin and eye contact and do not breathe mist when applying with a sprayer.

References

• The Mold Store: Guide to Sealing Cement and Concrete Stone, Countertops, Tile, Bricks and Pavers.
• Quikrete: Coatings FAQs.
• Quikrete: Project Details Entertaining at Its Best

Resources

• Read this Article in Spanish