How To Seal A Self-leveling Concrete

How to seal a self-leveling concrete

Self-leveling concrete is a popular choice for flooring because it can create a smooth and level surface quickly and easily. However, like all concrete surfaces, it is vulnerable to damage from spills, stains, and foot traffic. Sealing self-leveling concrete is important to protect it from these potential damages, as well as to enhance its appearance and longevity.

sealed self-leveling concrete floor

Sealing the surface of self-leveling concrete creates a barrier that prevents moisture, dirt and other contaminants from penetrating the concrete. This barrier helps to protect the surface from stains, abrasions, and other forms of damage. Additionally, a sealed surface is easier to clean and maintain and can resist fading and discoloration over time.

To ensure maximum protection and durability, it is important to properly seal self-leveling concrete. The following steps will guide you through the process of selecting and applying the appropriate sealer for your specific needs, as well as maintaining the sealed surface for long-lasting results.

Types of Sealers for Self-Leveling Concrete

Sealing self-leveling concrete involves applying a protective coating to the surface of the concrete. There are two main types of sealers to choose from: penetrating and topical.

Penetrating Sealers

Penetrating sealers are designed to penetrate the pores of the concrete and chemically bond with the substrate to create a protective barrier against moisture, stains, and other contaminants.

These sealers are typically made of silanes, siloxanes, or silicates and can provide a long-lasting protective barrier that doesn’t alter the surface appearance of the concrete. They are ideal for high-traffic areas or areas exposed to moisture, such as bathrooms or kitchens.

Topical Sealers

Topical sealers are applied to the surface of the concrete and create a film or coating that protects the concrete from moisture and contaminants. They come in different finishes, such as glossy or matte, and can enhance the appearance of the concrete surface.

Topical sealers can be further divided into two categories: film-forming and non-film-forming.

Film-forming sealers create a protective film on the surface of the concrete and are available in glossy, semi-glossy, or matte finishes. They can be made of acrylics, epoxies, or polyurethanes and are ideal for areas exposed to high levels of foot traffic or heavy machinery.

Non-film-forming sealers penetrate the surface of the concrete to create a barrier against moisture and contaminants, but do not leave a visible film on the surface. They are available in matte or glossy finishes and are ideal for surfaces where a natural look is desired, such as decorative concrete floors.

When selecting a sealer for self-leveling concrete, it is important to consider the level of traffic the area will receive, the type of contaminants the surface will be exposed to, and the desired appearance of the surface.

Preparing the Surface for Sealing

  • Before sealing self-leveling concrete, it is essential to properly prepare the surface. Proper preparation ensures that the sealer will adhere to the surface and provide long-lasting protection.
  • Clean the surface: Start by removing any dirt, dust, or debris from the surface of the concrete using a broom or vacuum cleaner. For stubborn dirt or stains, use a mild detergent and water solution to scrub the surface with a soft-bristled brush. Rinse the surface thoroughly with clean water and allow it to dry completely.
  • Moisture test: Test the surface for moisture using a moisture meter. Moisture in the concrete can prevent the sealer from bonding properly and can result in the peeling or flaking of the sealer. If the moisture content is too high, wait for the surface to dry completely before applying the sealer.
  • Repair any cracks or damage: Check the surface for any cracks, chips, or other damage. Repair any damage using a patching compound or epoxy filler, following the manufacturer’s instructions. Allow the repair to dry completely before proceeding.
  • Sand the surface: Use a sanding machine or sandpaper to lightly sand the surface of the concrete. This will remove any remaining dust or debris and create a slightly rough surface that will help the sealer adhere to the concrete.
  • Test the sealer: Test the sealer on a small, inconspicuous area of the concrete to ensure that it will adhere properly and provide the desired finish. Allow the test area to dry completely and inspect it for any discoloration or other issues before proceeding.

Applying the Sealer

Once the surface of the self-leveling concrete is properly prepared, it is time to apply the sealer. Follow these steps for the best results:

  • Choose the appropriate sealer: Choose the appropriate sealer based on the type of concrete surface, the desired finish, and the level of traffic. Be sure to follow the manufacturer’s instructions when selecting the sealer.
  • Apply the sealer: Apply the sealer evenly to the surface of the concrete using a brush, roller, or sprayer, according to the manufacturer’s instructions. Be sure to apply the sealer in thin coats, and avoid over-application.
  • Allow the sealer to dry: Allow the sealer to dry completely between coats, according to the manufacturer’s instructions. This typically takes 2-4 hours, depending on the type of sealer and the ambient conditions.
  • Apply additional coats: Apply additional coats of sealer as needed, following the same application process as the first coat. Typically, two to three coats of sealer are required for optimal protection.
  • Let the sealer cure: Allow the sealer to cure completely before using the surface. This typically takes 24-48 hours, depending on the type of sealer and the ambient conditions.

Maintaining Sealed Self-Leveling Concrete

After the self-leveling concrete surface has been properly sealed, it is important to maintain the surface to ensure that the sealer continues to provide long-lasting protection. Follow these tips to properly maintain the sealed self-leveling concrete:

  • Clean the surface regularly: Clean the surface regularly using a mild detergent and water solution, and a soft-bristled brush or mop. This will help to remove any dirt, dust, or debris that can scratch or damage the surface. Avoid using harsh chemicals or abrasive cleaners that can damage the sealer.
  • Wipe up spills immediately: Wipe up any spills or stains immediately using a clean, damp cloth. This will prevent the spills from penetrating the sealer and damaging the concrete surface.
  • Avoid heavy traffic: Avoid heavy traffic on the sealed self-leveling concrete surface, especially during the first few days after sealing. This allows the sealer to cure properly and provide optimal protection.
  • Reseal the surface periodically: Periodically reseal the surface of the self-leveling concrete to maintain optimal protection. The frequency of resealing will depend on the type of sealer, the level of traffic, and the conditions of the environment. In general, it is recommended to reseal the surface every 1-3 years.
  • Prevent damage to the surface: Prevent damage to the sealed self-leveling concrete surface by using furniture pads under heavy furniture, avoiding dragging heavy objects across the surface, and using caution when using sharp objects on the surface.
michael Morris