When you install a concrete coating, there a 3 layers that need to work together to provide the best solution for long-term durability. We begin with the Basecoat to bond with the concrete, then add the flake layer to add aesthetics and texture and finish with the topcoat to add both abrasion and UV protection. With our Croc Floors, we use the Penntek Evolution system. It uses a blended Polyaspartic/Polyurea topcoat for the best protection and a pure Polyurea basecoat for maximum long-term adhesion.

In this article, we will focus on the basecoat since choosing the right type of basecoat is critical to ensuring a durable and long-lasting concrete floor coating. Two popular options for concrete coating basecoats are polyurea and polyaspartic coatings. While both of these coatings share many similarities, there are some key differences in their properties, benefits, and drawbacks.

Polyurea Basecoats

Polyurea coatings are a type of basecoat that are known for their high durability, superior adhesion to concrete and chemical resistance. They are made from a combination of a polyisocyanate and a synthetic resin, which forms a strong and flexible chemical bond (See the science) with the concrete substrate. Polyurea basecoats are highly resistant to abrasion, impact, and chemicals, making them an excellent choice for concrete coatings in high-traffic areas or areas that will be exposed to harsh weather conditions.

One of the key advantages of polyurea basecoats is their high flexibility and elongation, which means they can withstand changes in temperature and moisture levels without cracking or peeling. This makes them an ideal choice for areas with extreme climate conditions or for applications where movement and expansion are likely. Polyurea coatings are also highly resistant to UV radiation, which can prevent color fading and discoloration over time.

Polyurea coatings can be customized to include slip-resistant additives or other performance enhancements. However, one potential drawback of polyurea coatings is their higher cost, and more complex installation compared to other types of coatings.

Polyaspartic Basecoats

Polyaspartic coatings are another popular option for concrete basecoats. They are similar to polyurea coatings in that they are a type of spray-applied coating, but are made from a different type of resin. Polyaspartic coatings are highly resistant to UV radiation and color fading, making them a good choice for outdoor applications.

One of the key advantages of polyaspartic basecoats is their short cure time, which means they can be installed quickly and with less disruption to the project timeline. They are also available in a range of colors and finishes, and can be customized to suit any aesthetic preference. However, polyaspartic coatings are generally less flexible than polyurea coatings, which can make them more prone to cracking or peeling if the concrete substrate experiences movement or expansion.

Polyaspartic coatings are highly resistant to abrasion and chemicals, and require minimal maintenance over time. They are also generally less expensive than polyurea coatings, which can make them a more attractive option for projects on a budget.

Choosing the Right Basecoat

When choosing between polyurea and polyaspartic basecoats for a concrete coating project, there are several factors to consider. The specific requirements of the project, such as the climate, traffic levels, and performance requirements, will influence the choice between the two coatings. Other factors such as aesthetic preferences and budget constraints may also be relevant.

One key factor to consider when choosing a basecoat is the way that each type of coating bonds with the concrete substrate. Polyurea coatings form a strong chemical bond with the concrete, while polyaspartic coatings form a mechanical bond. While both types of bond can be effective, the strength of the bond will depend on a range of factors including the quality of the concrete substrate and the preparation process.

While a mechanical bond can be effective in providing a strong and durable coating, it may not be as strong as a chemical bond. Over time, the mechanical bond of a polyaspartic coating may begin to break down due to factors such as changes in temperature, moisture levels, or movement in the concrete substrate.

This can result in issues such as peeling or delamination of the coating, which can reduce the lifespan of the coating and require costly repairs or replacements.

In contrast, polyurea coatings form a strong chemical bond with the concrete substrate, which means that the coating is essentially fused to the substrate at the molecular level. This chemical bond provides a high level of adhesion and can help to prevent issues such as peeling or delamination over time.

In general, polyurea coatings are considered to be a more durable and long-lasting option for concrete basecoats, particularly in high-traffic areas or areas with extreme climate conditions. However, polyaspartic coatings may be a more attractive option for projects that have a limited budget.