When a concrete driveway starts to show signs of damage, the owner has the option to tear out the old concrete and replace it with a new one. However, it can be quite costly and time-consuming. One other option is driveway resurfacing. It makes use of a coating or overlay, enhancing both the form and function of the driveway. As long as it adheres properly to the old concrete, it should last several years. To ensure proper adhesion, contractors use what they call a Bonding Agent before the overlay is applied.
What is a Bonding Agent?
A bonding agent is like an adhesive or glue made especially for concrete. It is applied on the old concrete slab prior to installing the new overlay or coating. This way, it will adhere properly and effectively. This is also used in repairing holes and cracks on the concrete surface.
What to do Before Applying the Bonding Agent?
The old concrete slab often has a lot of dirt, dust, and even grime on its surface. These must be removed to make sure that the bonding agent would work as it should. It is highly recommended to pressure clean the surface thoroughly to remove anything that could affect the effectiveness of both the bonding agent and the new layer. If the surface has too much grease, oil, or stubborn dirt, a good blasting or grinding could take off the top layer completely and reveal a new, more sound surface.
What Type of Bonding Agent Should You Choose?
There are many different kinds of bonding agents available today. The right choice depends on what type of surface it will be applied on and what the purpose or function of that space would be.
Liquid bonding agent – This is mixed with water, cement, and sand to create a slurry. The new layer is applied while it is still sticky.
Two-part epoxy bonding agent – Like any other epoxy product, this is mixed right before it is applied. It is great for adding a concrete layer on an old concrete slab.
Powder bonding agent – This is often used on concrete that contains hard aggregates and those that are exposed to heavy traffic.
To get the best possible bonding agent type to use on the concrete, consult a pro. They would be able to provide you information about whether or not your concrete slab or the material that will be used on top of it would benefit from a bonding agent.