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How to Seal Block Paving: Easy Steps

Block paving can enhance the appearance of your driveway, patio, or walkway, but it requires proper maintenance to keep it looking its best. Sealing block paving is a crucial step in this process. It helps protect the surface from stains, weeds, and weather damage. Here’s a simple guide on how to seal block paving, ensuring it remains beautiful and durable for years.

Why Seal Block Paving?

Before diving into the steps, let’s understand why sealing block paving is essential:

  1. Protection from Stains: Sealing creates a barrier that prevents oil, grease, and other substances from penetrating the surface.
  2. Weed and Moss Inhibition: A sealed surface makes it harder for weeds and moss to grow between the blocks.
  3. Enhanced Appearance: Sealing enhances the color and texture of the paving, making it look new and vibrant.
  4. Weather Resistance: It protects against the damaging effects of UV rays, rain, and frost.

Materials Needed

To seal block paving, you’ll need the following materials:

  • Block paving sealant (water-based or solvent-based)
  • Pressure washer or hose
  • Broom or brush
  • Weed killer (if necessary)
  • Sand (for joint filling)
  • Roller or sprayer (for applying sealant)
  • Safety gear (gloves, goggles, and mask)

Step-by-Step Guide

1. Prepare the Area

Start by clearing the area of any furniture, pots, or other obstacles. This will give you easy access to the entire paved surface.

2. Clean the Block Paving

Thoroughly clean the block paving to remove dirt, grime, and stains. Use a pressure washer or a hose with a strong jet. Focus on removing any moss or algae. Allow the surface to dry completely before proceeding.

3. Apply Weed Killer

If you notice any weeds growing between the blocks, apply a weed killer. This will ensure that weeds do not grow back after sealing. Wait for the weed killer to take effect and remove the dead weeds.

4. Re-sand the Joints

Over time, sand between the paving blocks can be washed away. Before sealing, refill these joints with kiln-dried sand. Sweep the sand into the joints until they are fully filled. This step is crucial as it helps in stabilizing the blocks and prevents movement.

5. Choose the Right Sealant

There are two main types of block paving sealants: water-based and solvent-based. Water-based sealants are environmentally friendly and easier to apply. Solvent-based sealants offer longer-lasting protection but require more caution during application. Choose the one that best suits your needs.

6. Apply the Sealant

Wear your safety gear before applying the sealant. Use a roller or sprayer to apply an even coat of sealant over the block paving. If using a roller, work in small sections to ensure complete coverage. If using a sprayer, maintain a consistent spray pattern.

7. Allow to Dry

After applying the first coat, allow it to dry as per the manufacturer’s instructions. This usually takes 24 to 48 hours. For maximum protection, you may want to apply a second coat. Ensure the first coat is completely dry before applying the second one.

8. Final Touches

Once the sealant is dry, inspect the surface for any missed spots or uneven areas. Touch up these areas to ensure a uniform finish.

9. Maintenance Tips

To maintain the sealed block paving, regularly sweep the surface to remove debris. Reapply the sealant every 2-3 years, or as needed, to keep the paving in top condition.

Common Mistakes to Avoid

  • Skipping the Cleaning Step: Proper cleaning is crucial. Sealing over dirt or stains will trap them under the sealant, making them permanent.
  • Not Allowing Sufficient Drying Time: Ensure the paving is completely dry before applying the sealant. Moisture can prevent the sealant from adhering properly.
  • Over-application of Sealant: Applying too much sealant can lead to a cloudy or uneven finish. Follow the manufacturer’s instructions for the correct amount.


Sealing block paving is a straightforward process that can significantly enhance the longevity and appearance of your paved surfaces. By following these steps, you can protect your investment and keep your block paving looking pristine for years to come.

For a professional touch and to ensure the job is done correctly, you might want to consider hiring experts.

For a quote, contact VIV Construct Group.

Sealing your block paving not only improves its aesthetic appeal but also ensures it remains durable and resistant to various elements. By doing it yourself, you can save money, but professional services can provide a flawless finish. Don’t hesitate to reach out for expert assistance!