Sealant FAQs | 5 Features To Look For In A Concrete Sealant

Irrespective of the type of concrete you used in your project, you should know that no installation is complete until you apply a sealant. Not only does a concrete sealant help enhance the appearance of the material, but it is also known to protect the surface from dirt, chemicals, oil and stains for many years to come. However, in order to enjoy the numerous benefits provided by a sealer, it is important that you know how to pick the right one for the task at hand. Let's summarize the main features to look for when shopping around for a concrete sealant.

1.How does the sealant interact with the other substances?

In the eventuality that you intend to apply the sealant as an overlay, then it is very important to check whether it is compatible with the surface that you intend to spread it on. Selecting the wrong type of sealant for the job will result in unwanted effects and could even ruin your entire project. Ideally, you should check out various specialty websites and purchase the sealant designed specifically for a certain surface or material.

2.Will the concrete handiwork be exposed to high traffic and/or the elements?

To avoid having to perform maintenance frequently, it is recommended to choose a sealant that provides protection against the specific conditions to which the concrete installation is commonly exposed. In general, a water-based acrylic is a good choice for outdoors concrete projects, as it can easily penetrate into the material and grant excellent protection against the elements. For interior concrete installation, an epoxy or polyurethane based sealant will protect your handiwork against scuffs and stains.

3.What type of finishing do you want to achieve?

In case you are interested in enhancing the coloring of the concrete, then you should look for an acrylic sealant with a medium to high gloss sheen. Moreover, you can mix a solvent-based sealant with a colored powder or a liquid tint to create color washes on the surface. On the other hand, if you are not aiming for a shiny or wet appearance, then apply a film-forming sealant with matte or low polish finishes. Alternatively, you can apply a penetrating sealant.

4.Is it breathable?

The reason why acrylics are prefers for outdoor applications is that they are breathable. A breathable sealant implies that the finish will repel water, while allowing some water vapors that get trapped inside to escape. While some epoxy-based sealants are excellent water repellents, take note that they are also impermeable and hence, they will affect the structure of the concrete slab from the inside out.

5.How long will the sealant last?

In general, if you apply a sealant following the manufacturer's recommendations, you will not have to worry about reapplying it for a pretty long time. Even though epoxy and urethane based sealants deliver the best long-term protection, do not forget that the level and duration of protection they provide also depends on the environmental conditions and maintenance. In addition, while most sealants are covered by warranty, make sure to respect the manufacturer's guidelines or else you risk voiding it.