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The actual moisture level that is acceptable for your concrete floor depends on what primer or flooring material you plan to install above it. For this reason, you should check the manufacturer’s instructions for the exact details.

Generally, the moisture levels should be 3.5% to 4.5%, although it does vary. Some products can handle higher levels of moisture, so you should always test your concrete before purchasing your flooring materials.

Concrete is extremely porous. Without a proper sealing, it will absorb just about anything it comes in contact with, including water and ice. During the colder months with freeze-thaw cycles, this could cause the concrete to crack and become damaged in other ways. You always want to seal your cleaned concrete surfaces after they’ve completely dried out.

Unlike staining concrete, painting concrete often results in chips and peeling over time. You can expect numerous touchups over the years if the concrete is in a high-traffic area. Since concrete paints are opaque, you may also find it more difficult to get the exact color results you want. Lastly, painting concrete can make it much more slippery unless you mix in an additive for traction.

When you’re painting a garage floor, it’s best to use a combination of rollers and brushes. You’ll want to start with a brush, making a border around the edges where the floor meets the wall. From there you can use a roller, though some people also like to do the entire first coat with a brush because it’s easier to work the paint into the textured concrete.