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Brick Driveway Wash, Polymeric Sand, and Sealant Application

In this article, we will be explaining how to restore an old brick driveway back to its original condition. This is done by pressure washing, moss removal, polymeric sand application, and sealant application.

Algae On Brick
Original State of the Driveway

Pressure Washing The Brick & Moss Removal

Pressure washing is a necessary preparatory step for sealer application. Pressure washing serves multiple purposes- it removes dirt from within the pores of the bricks, it loosens the moss growth between the bricks, and it removes algae and mold growth.

This process will dramatically lighten the color of the bricks and restore an even finish throughout if done properly with a surface cleaner.

Before and After Brick Pressure Wash
Driveway Partially Washed

Polymeric Sand Application

Polymeric sand is the filler between the bricks holding them in place. This differs from normal sand due to the polymer structure that is developed when it reacts with water. This creates a very firm structure and prevents sand from blowing away from the wind, leaf blowers, or high water flow on the surface. This polymeric sand is essential to the process as it creates rigidity for the driveway, holding it in its original shape for long time periods. 

Polymeric sand is applied by dumping the sand in a line across the driveway towards the top. With a hard bristled broom, push that sand down evenly until all gaps have been filled and the sand is used up. From there, continue pouring and sweeping sand throughout for a uniform finish. 

Applying Polymeric Sand
Applying Polymeric Sand

After the sand has been applied, thoroughly apply water to the surface with a low-pressure method to allow the polymers to activate.

Sealer Application

Masonry sealer should be applied to the bricks after the polymeric sand has been allowed to dry and cure. This product will seal the porous surface of the bricks, preventing damage from freeze/thaw cycles, and preventing intrusion from oil, water, salt, and chemicals. Sealer prevents anything from coming in or out for years to come, meaning your driveway can be easily cleaned with a normal hose while the sealer is working.

Masonry Sealer Application
Sealer Application

The sealer application is quite simple. Load up a pump sprayer with the masonry sealer, pressurize it, and get spraying. Apply the sealer until you notice a white, milky appearance, and move on to the next area. If it dries in less than 5 minutes, another coat is needed. The driveway should look noticeably more “wet” after application and should feel like 120 grit sandpaper when walking on it.

Applying Masonry Sealer
Applying Masonry Sealer

Finished Project

This project looked beautiful when it was completed. It went from a dark, algae-covered, moss-filled driveway back to looking like new.

Finished Driveway
Finished State of the Driveway

If you are interested in a free quote on restoring your brick driveway, request an estimate here.


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