Concrete is one of the most durable materials. It can last a century or longer with proper maintenance regardless of the application. Modern concrete works well in both indoor and outdoor construction projects as well as in decorative design. However, you need to apply some form of sealant or coating to it to maintain its look and longevity.
How exactly do concrete sealants help?
Concrete coatings prevent deterioration caused by chemicals, light, moisture and temperature changes. Since concrete is porous, some sealants are designed to prevent moisture from reaching the interior surfaces. These coatings help prevent bacteria and mold growth, moisture contraction and expansion during temperature changes, and general erosion.
Some sealants act like reinforcing binders and protective shields, so any wear mostly affects the sealant instead of the concrete. These coatings make a surface resistant to impacts, stains and wear caused by foot traffic and work or play activities.
Invisible coatings protect the material while allowing you to recreate a matte or no-gloss finish. Noticeable coatings create smoother or shinier surfaces or emphasize specific decorative details.
What are the main differences?
A penetrating sealant decreases incidents of anything reaching the interior of concrete and causing damage while maintaining a natural or semi-gloss surface appearance. This type of sealant allows air passage and moisture removal, which makes it great for outdoor applications in four-season, temperate climate regions that experience harsh temperature changes or surface de-icing and herbicide chemical treatments. Common examples include driveways, walkways, stairs, decks and patios, pool deck areas, and garden sculptures.
A film-forming sealant creates a durable and noticeable matte, semi-gloss, or high-gloss barrier. That said, this type can trap moisture under or within the material. It’s a poor choice for any surface that might experience exposure to high-volume or standing water. Film-forming sealants are mainly used indoors as seen with flooring projects. You can also use it to highlight an outdoor aggregate or brushed surface, emphasize decorative colors and stamped details, or make pavers arranged in patterns look wet.
Which option is the right one?
Before you pick a sealant, always think about how you plan to use the concrete and consider potential natural and human-made elements that might cause faster deterioration. If you don’t want to change the look of the surface or you’re working outdoors, a penetrating sealant usually performs best. Additionally, it requires the use of less energy and time than a film-forming one during initial installation and follow-up maintenance. A film-forming sealant can help you achieve a specific decorative look and level of protection, but you usually need to pay more for installation and maintenance. Film-forming sealants can discolor, scratch and wear in ways that are more noticeable than penetrating options.
The right sealer for a specific concrete project is critical to making surfaces appear exactly as desired and more durable and longer-lasting. For additional tips about concrete or other home topics, check out our Facebook and Instagram accounts. To find a top-notch concrete and sealant professional to complete the job in your local area, visit our Marketplace.
