How To Cure and Seal Concrete 

Concrete floors are popular for their durability, cost-effectiveness, versatility and cleanability. However, to get that tough floor, there are two steps you can’t omit: concrete curing and sealing.  

Curing ensures that your concrete achieves its full potential strength, while sealing protects the cured concrete from external elements to improve longevity. Read on to learn how to cure and seal concrete.  

What Is Concrete Curing and Why Is It so Important? 

Concrete curing is the process of maintaining adequate moisture and temperature to allow the cement within concrete to hydrate properly. Hydration is a chemical reaction between cement and water that makes concrete harden and gain strength. 

Hydration slows down or stops too early if concrete isn’t properly cured. You end up with weaker concrete with more cracks, less durability and a much shorter lifespan.  

Poor curing means your slab may never reach its full structural potential. This leads to dusting, surface defects and costly repairs down the line. So, if you want to achieve maximum concrete longevity and strength, curing must be done. 

Curing begins immediately after the concrete is finished and should continue for at least seven days. However, it takes about 28 days to cure fully. The duration can vary depending on weather, mix design, humidity and slab thickness. 

What Is Concrete Sealing and Why Should I Bother? 

Even after curing, concrete still needs sealing. Concrete has tiny pores that allow dirt, mold and moisture to penetrate. Over time, this can weaken the concrete, causing cracks and degradation. Concrete sealing is applying a protective coating to a concrete surface to enhance its durability, appearance and resistance to damage.  

One of the top benefits of sealing concrete is to prevent water intrusion, which causes surface erosion, cracking and spalling in cold climates. Sealing protects against oil stains, mold growth, UV damage and color fading. A sealed concrete floor simply looks more appealing and lasts longer.  

When Is the Best Time To Apply Concrete Sealer? 

Not sure when and how to seal concrete? Wait at least 28 days before applying a sealer to new concrete. This allows the concrete to cure and fully reach its intended strength. Sealing too early can trap moisture underneath, causing peeling, bubbling, discoloration or weakening the slab.  

The temperature and weather also matter. Concrete sealing should be done in dry conditions when the temperature is between 50°F and 90°F. High temperatures can cause the sealer to evaporate too quickly. Ensure the slab is clean, dry and free of old sealers, oils or debris to ensure good adhesion.  

What Are the Different Types of Concrete Sealers and Which One Is Right for My Project? 

Not all sealers are the same. According to the concrete experts at ICS, understanding penetrating concrete sealer vs. topical sealer is key to choosing the right concrete sealer for your needs. 

Penetrating Sealers 

These soak into the concrete and react chemically to create a water-repellent barrier below the surface. Common types include silane, siloxane and silicate-based sealers.  

Penetrating sealers don’t alter the surface texture and are highly effective against freeze-thaw damage, moisture intrusion and deicing salts. They are best for driveways, sidewalks and exterior slabs where slip resistance is essential. 

Topical Sealers 

These sealers form a protective film on the surface and often enhance color and sheen. Topical sealers include:  

• Acrylics: These topical sealers form a thin, breathable film that offers moderate protection against water, UV rays and stains. Acrylic sealers are affordable, quick-drying and suitable for both interior and exterior use. However, you need to reapply more frequently than the rest.  
• Polyurethanes: Although the film is thicker than acrylics, polyurethanes are highly durable and suitable for high-traffic areas. The only issue is that they become slippery when wet.  
• Epoxies: Epoxies provide a hard, durable and glossy finish. They have excellent chemical and stain resistance, but can trap moisture and are not UV resistant. Best for interior floors.  

Where Can I Find Quality Curing and Sealing Products? 

Not all curing and sealing products are created equal. Therefore, you need to find quality products that suit your specific needs. Concrete experts like Intermountain Concrete Specialties (ICS) offer a full range of concrete supplies, including top-tier curing compounds and sealers for every kind of project. Their concrete experts will listen to you to understand your needs, recommend the best product and provide expert tips for application.  

Wrapping Up 

Curing and sealing concrete will significantly improve its strength, durability and appearance. If you are unsure how to cure concrete or the best sealer for your surface, contact the concrete experts at Intermountain Concrete Specialties for help. These professionals will help you choose the right products to get the most out of your investment.