Can you fill in deep concrete cracks using floor leveling compound?

If you have a concrete surface with deep cracks, you may wonder if you can use floor leveling compound to fill them in. Concrete cracks can be unsightly and affect the functionality of the surface, so finding a solution is important. In this article, we will explore the feasibility of using floor leveling compound to fill deep concrete cracks and provide some alternative options to consider.

Understanding Floor Leveling Compound

Before delving into whether floor leveling compound can fill deep concrete cracks, it is crucial to understand what it is. Floor leveling compound is a cement-based material that is self-leveling and designed to smooth out uneven surfaces. It is typically used to level out minor imperfections, such as low spots, small cracks, or unevenness in a concrete subfloor before installing flooring materials.

The Limitations of Floor Leveling Compounds

While floor leveling compounds are effective for minor imperfections, they may not be the best solution for deep concrete cracks. Here are a few reasons why:

1. Shrinkage: Floor leveling compounds can shrink as they dry, which may cause the fill material to pull away from the edges of the crack, leaving gaps.
2. Durability: Floor leveling compounds are intended for thin applications, usually up to 1/2 inch thick. Attempting to fill deep cracks with a thick layer of leveling compound may lead to reduced durability and potential future cracking.
3. Variable Depth: Deep concrete cracks may vary in depth and width, making it difficult to achieve a uniform and level surface using a floor leveling compound alone.

Alternatives to Filling Deep Concrete Cracks

Instead of relying solely on floor leveling compound for deep concrete cracks, it is advisable to consider alternative solutions that are more suitable for large, structural repairs. Here are a few options to consider:

1. Epoxy Injection: Epoxy injection is a common method used to repair deep cracks in concrete structures. It involves injecting epoxy into the cracks, which fills and bonds them together, increasing their strength and stability. This method is particularly effective for structural cracks and can provide a longer-lasting solution.
2. Hydraulic Cement: Hydraulic cement is a fast-setting material that expands as it sets. It can be used to fill deep cracks as it has the ability to bond well with concrete and withstand moisture. However, it may not be as effective for wider cracks.
3. Concrete Overlay: For extensive and severe concrete cracks, applying a concrete overlay may be the best solution. This involves pouring a new layer of concrete over the existing surface, effectively covering the cracks and providing a new, durable surface.

While floor leveling compound is effective for minor imperfections in a concrete surface, it may not be suitable for filling deep cracks due to its limitations in shrinkage, durability, and variable depth. Instead, it is recommended to explore alternative options such as epoxy injection, hydraulic cement, or concrete overlay for a more robust and long-lasting repair. It is always advisable to consult a professional or seek expert advice before deciding on the best solution for your specific situation.