Can Polyaspartic Coating be Applied on Top of Epoxy Coating?

Can Polyaspartic Coating be Applied on Top of Epoxy Coating?

Polyaspartic coating and epoxy coating are two popular options for protecting and enhancing the durability of surfaces. But can you apply polyaspartic coating on top of epoxy coating? In this article, we will explore the compatibility and benefits of using polyaspartic coating as a topcoat for epoxy coatings.


When it comes to protecting floors, walls, and other surfaces, epoxy coatings have been a trusted choice for many years. Epoxy coatings provide excellent resistance against chemicals, abrasion, and impact, making them ideal for commercial and industrial applications. However, epoxy coatings can be prone to yellowing, especially in high-UV environments and when exposed to sunlight. This is where polyaspartic coatings come in.

Understanding Polyaspartic Coatings

Polyaspartic coatings are a type of fast-curing polyurea coating that offers exceptional durability and protection. They are often used as topcoats for epoxy coatings due to their excellent UV stability and resistance to yellowing. Polyaspartic coatings can be applied in a variety of thicknesses, ranging from thin mil to self-leveling, depending on the requirements of the project.

Compatibility with Epoxy Coatings

The good news is that polyaspartic coatings can indeed be applied on top of epoxy coatings. In fact, they are specifically formulated to work as a topcoat for epoxy coatings. This compatibility makes them a popular choice for achieving a durable and long-lasting finish. When applied over an epoxy coating, polyaspartic coatings can enhance the aesthetic appearance and provide additional protection against UV radiation, scratches, and stains.

Benefits of Polyaspartic Coatings over Epoxy Coatings

  1. Rapid Cure Time: One of the key advantages of polyaspartic coatings is their fast cure time. Unlike traditional epoxy coatings, which can take several days to fully cure, polyaspartic coatings cure within hours. This allows for faster project completion and minimizes downtime.
  2. UV Stability: Polyaspartic coatings have excellent UV stability, making them highly resistant to yellowing and discoloration. This is especially beneficial for outdoor applications or areas with exposure to sunlight.
  3. High Chemical Resistance: Polyaspartic coatings offer superior chemical resistance compared to epoxy coatings. They can withstand a wide range of chemicals, including solvents, acids, and alkalis, without suffering from degradation or damage.
  4. Flexibility and Impact Resistance: Polyaspartic coatings have a higher degree of flexibility and impact resistance compared to epoxy coatings. This makes them better suited for areas that experience heavy foot traffic or equipment movement.
  5. VOC Compliance: Many polyaspartic coatings are low in volatile organic compounds (VOCs). This makes them an environmentally-friendly choice for both indoor and outdoor applications.

How to Apply Polyaspartic Coating on Top of Epoxy Coating

When applying polyaspartic coating on top of epoxy coating, it is important to follow the manufacturer's instructions and recommendations. Here is a general guide on how to apply polyaspartic coating on top of epoxy coating:

  1. Surface Preparation: Ensure that the epoxy coating is fully cured and free from any contaminants. Thoroughly clean the surface to remove dust, dirt, and grease.
  2. Primer Application: Apply a suitable primer compatible with both epoxy and polyaspartic coatings. This will ensure proper adhesion between the layers.
  3. Polyaspartic Coating Application: Apply the polyaspartic coating using a roller or squeegee, following the manufacturer's instructions regarding thickness and dry time.
  4. Cure Time: Allow the polyaspartic coating to cure completely as per the manufacturer's specifications. This may typically range from a few hours to a day.
  5. Optional Topcoat: Depending on the desired finish and level of protection, you can apply an additional polyurethane topcoat over the cured polyaspartic coating for added durability and gloss.


Polyaspartic coatings can be successfully applied on top of epoxy coatings, providing enhanced durability, UV stability, and chemical resistance. The compatibility between these coatings makes polyaspartic coatings a versatile and reliable choice for various surface protection applications. When properly applied, polyaspartic coatings can extend the lifespan of epoxy coatings while providing additional benefits.
In summary, the answer to the question "Can polyaspartic coating be applied on top of epoxy coating?" is a resounding yes. By combining the strengths of both coating systems, you can achieve a superior finish that withstands the test of time.

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