Cobblestone is a small round or square stone that is often made up of granite. They are very porous and vary in shape, size, and color.
The best type of concrete sealer for cobblestone is a penetrating water repellent sealer. Water repellent sealers will penetrate into the cobblestone and chemically react to form a water repellent barrier within the pores. They won’t change the look or color of the cobblestone, and will help to protect the cobblestone against damage and deterioration against the absorption of water, snow and ice, de-icing and road salts. Water repellent sealers will also help to reduce mold and mildew growth, and the formation of efflorescence.
The two main types of water repellent sealers are Siliconate water repellents and Silane-Siloxane water repellents. Siliconate water repellents can leave behind a white surface residue unless applied to light or white concrete. Silane-Siloxane water repellent sealers won’t have that issue however, which is why they are the best water repellent sealer to use on cobblestone.
Best Water Repellent Sealers:
- Eagle Natural Seal (average 4.0 star review)
- Armor SX5000 Concrete Sealer Review (average 4.8 star review)
- Siloxane PD Concrete Sealer Review (average 4.5 star review)
- Okon S-20 Concrete Sealer Review (average 4.0 star review)
- Thompson’s Water Seal Concrete Sealer Review (average 3.2 star review)
There are cobblestones, and cobblestone concrete. Cobblestones, as mentioned above, are small stones usually made of granite while cobblestone concrete is stamped concrete that is made to look like cobblestones. If you have stamped concrete that was made to look like cobblestone, you can use a water repellent sealer or an acrylic sealer. Acrylic sealers will help to enhance the look and color of the stamp, and leave behind a protective gloss finish. Learn more about the best Acrylic Concrete Sealers.