What Is Soda Blasting?

Soda blasting is a method of cleaning that uses pressurized sodium bicarbonate, also known as baking soda, as a gentle abrasive to clean objects and even remove tough coatings without damaging the surface. The system for soda blasting operates similarly to regular sandblasting, using compressed air to bombard the surface with particles. The result is that finishes, coatings, dirt, grease, and calcium deposits can be removed without damaging the surface you are targeting. You can rent equipment for soda blasting, or you can get some help from a local pro. Here is how it works.

Average Cost of Soda Blasting

To soda blast an area yourself, you can expect to pay between $1.50 and $2.50 per pound for the medium and $200 on average to rent the blasting equipment. You can expect to use about five to 10 pounds of sodium bicarbonate medium per square foot for most soda blasting jobs. The price of the equipment may vary depending on the scope of your particular job. 

To hire a company to do soda blasting for you, expect to pay between $1.50 and $7 per square foot, depending on the size and complexity of your job.

Why Choose Soda Blasting?

Baking soda, the abrasive material in soda blasting, is gentler than other types of sandblasting materials, so it is better for surfaces where you are concerned about causing damage. 

On the Mohs scale to determine hardness, sodium bicarbonate is the least hard medium used for blasting. This can include things like car parts, brick and stonework, tiles like those in pools and patios, and even outdoor furniture. Soda blasting can remove graffiti, paint spills, grease, oil stains, mold, and smoke damage without causing visible marks on the surface that you are cleaning.

Common Uses for Soda Blasting

Soda blasting is a versatile way to clean many surfaces. Since it is relatively gentle compared to traditional sandblasting, it can be used in some situations where sandblasting would not be recommended. Soda blasting can be used to remove:

• Paint

• Protective coatings

• Calcium deposits

• Smoke residue or soot

• Rust

• Oil

• Grease

• Gum

• Adhesives

• Mold

• Ink

• Asphalt

• Powder coating

Surfaces That Can Be Cleaned With Soda Blasting

Since soda blasting is gentler than traditional sandblasting and the medium comes apart more easily on impact than the mineral aggregate used in sandblasting, it is good for cleaning delicate surfaces and specialty parts, as well as other types of surfaces. It does not tend to scar or etch the surface that it is being used on. Soda blasting can be used to clean:

• Car parts

• Fiberglass

• Stucco

• Wood

• Metal

• PVC

• Aluminum

• Composite

• Stone

• Concrete

• Masonry

• Plastic

• Asphalt

• Pavers

Places Where Soda Blasting Does Not Work Well

Because it is more gentle, soda blasting is less useful for removing thick, built-up rust. It should not be used around gardens or foliage because of its alkalinity, as it can kill plants by changing the pH of soil. It can be difficult to get the sodium bicarbonate medium to target very smooth surfaces, like gloss paint on metal, because it is not as hard as the aggregate used in traditional sandblasting.

Soda Blasting Is a Safe Alternative

Sodium bicarbonate has an alkaline pH, but aside from causing some skin and eye irritation, it is relatively harmless. While you should wear proper safety equipment when using soda blasting equipment, including goggles and gloves, contact with sodium bicarbonate does not cause any long-lasting symptoms or damage to people.

Using soda blasting outdoors is also considered to be safe, as the sodium bicarbonate does not have lasting effects on the surrounding environment. Although dust from soda blasting can change the pH of soil local to the blasting, it generally does not persist in soil or cause damage outside of the blasting area. Using some dust control, such as wetting down the area around which the blasting occurs and setting up barriers like tarps or drop cloths, can help prevent local damage to plants.