Can you apply concrete resurfacer to epoxy-coated concrete?

Let’s delve into this question in more detail.

Understanding Concrete Resurfacer and Epoxy Coating

Before discussing the compatibility of these two materials, it’s essential to understand what concrete resurfacer and epoxy coating are and how they function.

Concrete Resurfacer: Concrete resurfacer is a special product designed specifically for addressing worn or damaged concrete surfaces. It consists of a mixture of cement, fine aggregates, and polymer modifiers, which creates a strong and durable bond when applied to existing concrete. This resurfacing material typically comes in a powder form that needs to be mixed with water before applying.

Epoxy Coating: Epoxy coating is a protective layer applied to concrete to improve its durability, resistance to chemicals, and aesthetics. It consists of two main components – epoxy resin and a hardening agent. When these two components are mixed together, they chemically react to form a tough and glossy coating that adheres tightly to the concrete surface.

Compatibility of Concrete Resurfacer and Epoxy Coating

Concrete resurfacer can be applied to epoxy-coated concrete with some considerations. While epoxy coatings form a robust and bonded surface, they can develop flaws and imperfections over time due to wear and tear, UV exposure, or inadequate application. Concrete resurfacer can effectively cover these imperfections and provide a fresh, new surface.

However, it is crucial to assess the condition of the epoxy coating before applying concrete resurfacer. If the epoxy coating is extensively damaged, peeling off, or delaminating from the concrete, it is recommended to remove it completely before proceeding with resurfacing. Applying concrete resurfacer over severely damaged epoxy coating will not deliver satisfactory results and can lead to premature failure of the resurfaced surface.

Preparing the Epoxy-Coated Concrete for Resurfacing

To ensure successful application of concrete resurfacer on epoxy-coated concrete, thorough preparation of the surface is essential. Follow these steps to prepare the surface properly:

1. Clean the Surface: Remove any dirt, dust, grease, or contaminants from the epoxy-coated concrete surface using a pressure washer or with the help of appropriate cleaning agents.
2. Repair Damaged Areas: Inspect the epoxy coating for any visible flaws, holes, or cracks. Use an epoxy repair compound to fix these damaged areas. Allow the repaired areas to cure completely before moving forward.
3. Profile the Surface: Sand or etch the entire epoxy-coated concrete surface to create a rough profile that promotes better bonding between the old coating and the new resurfacer. Follow the manufacturer’s instructions for the appropriate method and tools to achieve the desired profile.
4. Remove Loose Epoxy: If there are loose or flaking areas of the epoxy coating, it is important to remove them by grinding or sanding. Avoid leaving any loose material on the surface, as it can affect the adhesion of the resurfacer.
5. Clean the Surface Again: After profiling and removing loose epoxy, thoroughly clean the surface to remove any debris, dust, or particles. This step is crucial to ensure optimal bonding between the epoxy coating and the concrete resurfacer.

Applying Concrete Resurfacer to Epoxy-Coated Concrete

Once the surface is properly prepared, you can proceed with applying the concrete resurfacer by following these steps:

1. Mix the Resurfacer: Prepare the concrete resurfacer mixture by following the manufacturer’s instructions. It is typically a two-step process – first, adding a specified amount of water to a mixing container, and then gradually adding the resurfacer powder while stirring continuously until a smooth consistency is achieved.
2. Apply the Resurfacer: Start by dampening the prepared surface with water to prevent it from absorbing excessive moisture from the resurfacer. Then, using a steel trowel or squeegee, spread the resurfacer mixture evenly over the epoxy-coated concrete surface. Work in small sections to ensure a consistent application.
3. Smooth and Level: After spreading the resurfacer, use a steel trowel or a long-handled squeegee to smooth and level the material. Avoid leaving any thick or thin spots. The resurfacer should be approximately 1/8 to 1/4 inch thick.
4. Allow for Proper Drying: Ensure that the resurfaced area remains undisturbed during the drying process. The curing time can vary depending on factors such as temperature, humidity, and the specific product used. Refer to the manufacturer’s instructions for the recommended curing time.

While it is possible to apply concrete resurfacer to epoxy-coated concrete, thorough surface preparation and assessment of the epoxy coating’s condition are paramount. Concrete resurfacer can effectively cover minor imperfections and restore the appearance of a worn or damaged epoxy coating. However, if the epoxy coating is severely compromised, it is advisable to remove it entirely before proceeding with resurfacing. By following the proper steps and guidelines, you can achieve a rejuvenated and long-lasting concrete surface.