Repair Cracks in Exposed Aggregate

How to Repair Cracks in Exposed Aggregate Concrete: A Comprehensive Guide


Exposed aggregate concrete, while known for its durability and aesthetic appeal, is not immune to wear and tear.

Over time, factors like weather fluctuations, heavy loads, or ground movements may cause cracks to form.

These cracks, if left unaddressed, can lead to further damage and compromise the integrity of your concrete surface.

This article aims to guide you through the process of repairing cracks in exposed aggregate concrete to ensure your surface remains robust and visually appealing.

I. Evaluating the Damage

The first step in any repair process is assessing the extent of the damage.

Size and Depth of Cracks

Cracks can range from hairline fractures to larger, more noticeable ones. Small cracks, less than 1/4 inch wide, are relatively straightforward to fix. Larger cracks, however, may require a more intensive repair process or even professional intervention.

Cause of Cracks

Understanding the underlying cause of the cracks can help prevent them from recurring. Common causes can include weather changes, ground shifts, or an initial improper installation.

cracked concrete

II. Materials and Tools Needed

Before starting the repair process, gather all necessary materials and tools.

Concrete Crack Filler or Repair Product

This is the main material that will fill the cracks. For small, shallow cracks, a simple concrete crack filler will suffice. For deeper or wider cracks, a more substantial concrete repair product might be needed.

Trowel or Putty Knife

This tool is used to apply the repair product into the cracks and smooth the surface afterward.

Wire Brush

This can be useful for cleaning the cracks before repair.

Protective Gear

Safety goggles and gloves should be worn during the repair process to ensure your safety.

III. Preparing the Cracked Area

Proper preparation of the cracked area is vital to a successful repair.


Use the wire brush to clean out any loose concrete, debris, or dust within the cracks. This ensures a clean surface for the repair product to adhere to.

Preparing the Repair Product

Follow the manufacturer’s instructions to prepare your chosen concrete crack filler or repair product.

IV. Repairing the Cracks

With your surface prepared and your materials ready, you can now proceed with the repair process.


Use your trowel or putty knife to apply the repair product to the cracks. Be sure to press the product firmly into the cracks to ensure they are filled completely.


After filling, smooth out the repair product so that it aligns with the surface level of the rest of the concrete.

V. Curing and Finishing

After the cracks have been filled, it’s crucial to allow the repair product to cure properly.

Curing Time

The curing time can vary depending on the repair product used, so it’s essential to refer to the manufacturer’s instructions.


After the repair has cured, it’s recommended to seal the entire surface of the concrete. This not only protects the repaired area but also helps to enhance the overall look of the exposed aggregate concrete.


Maintaining your exposed aggregate concrete goes beyond regular cleaning – it involves timely repair of cracks to prevent further damage.

By following this guide, you can address minor cracks on your own, helping to prolong the lifespan of your concrete and keep it looking its best.

Remember, if the damage is severe or extensive, it’s always wise to call in a professional to ensure the repairs are carried out correctly and safely.

Leave a Reply

Your email address will not be published. Required fields are marked *

(08) 7282 0880