CustomCrete FAQ: What is Shot Blasting?

Shot blasting is a concrete surface preparation method that uses small steel beads, called shot, to remove old coatings, surface contaminants, and weak concrete while creating a textured surface for new flooring systems. It is commonly used before installing epoxy, urethane cement, and other industrial concrete coatings because it helps create a strong bond between the coating and the concrete.

For warehouses, manufacturing facilities, and commercial buildings, proper concrete surface preparation is one of the most important steps in a flooring project. Understanding how shot blasting works can help facility managers determine why this process may be necessary before installing a new floor.

At CustomCrete, questions about concrete shot blasting often come from facility managers preparing for a flooring renovation or comparing different surface preparation methods.

How Does Concrete Shot Blasting Work?

Shot blasting uses specialized equipment that propels small steel beads against the concrete surface at high speeds.

As the steel shot strikes the concrete, it removes surface material and creates a rough texture. The machine then collects the steel shot for reuse while a connected dust collection system removes debris.

This process creates a surface profile that allows new concrete coatings to bond more effectively.

Unlike traditional sandblasting, industrial floor shot blasting is typically performed using enclosed equipment designed to contain most of the debris.

What Is Shot Blasting Used For?

Shot blasting concrete is commonly used to prepare industrial and commercial floors before installing new coatings.

Typical applications include:

• Removing existing coatings and sealers
• Removing weak or deteriorated surface concrete
• Creating a textured surface for coating adhesion
• Preparing large warehouse and manufacturing floors
• Removing certain surface contaminants
• Preparing concrete for epoxy and urethane cement flooring systems

The amount of material removed depends on the equipment, shot size, and desired surface profile.

What Are the Benefits of Shot Blasting Concrete?

One of the biggest advantages of shot blasting is its ability to prepare large concrete surfaces efficiently.

Additional benefits include:

• Strong coating adhesion: Creates a mechanical profile that helps coatings bond to concrete.
• Efficient preparation: Covers large, open floor areas relatively quickly.
• Controlled dust: Enclosed equipment and dust collection systems capture much of the debris.
• Consistent surface texture: Produces a uniform profile when properly operated.

However, shot blasting is not always the best option for every project, especially smaller spaces or areas with limited equipment access.

Is Shot Blasting Better Than Diamond Grinding?

Not necessarily. Both methods are commonly used for industrial concrete surface preparation, but they serve different purposes.

Shot blasting uses steel shot to create a textured surface, making it useful for many coating installations.

Diamond grinding uses rotating diamond tooling to remove surface material and can be better suited for smoothing high spots, removing certain coatings, and preparing areas that require a less aggressive profile.

Some flooring projects require both methods to achieve the desired surface condition.

Does Shot Blasting Create Dust and Noise?

Yes. Shot blasting equipment can be loud and should be operated with appropriate hearing protection.

Although the equipment is designed to contain debris and collect dust, the process is not completely dust-free.

In occupied facilities, shot blasting may be scheduled during off-hours or completed in sections to reduce disruption to employees and daily operations.

Final Thoughts

Shot blasting is an effective concrete surface preparation method that removes unwanted surface materials and creates the texture needed for many industrial flooring systems. While it works well for large areas and coating preparation, diamond grinding may be more appropriate for certain surfaces and project requirements.

To better understand which method may work best for your facility, read the next article: "Grinding vs Shot Blasting Concrete: What’s the Right Prep Method for Your Project?"