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You’ll usually need to prime a garage floor before painting—especially if the floor is unpainted. Garage floors are made from concrete, which is porous and produces dust. The dust can contaminate the paint and cause issues with adherence. 

Primer creates a barrier and gives you a clean surface to work on. It also minimizes absorption to help give you an even, pro-looking paint job. Make sure you choose a primer that’s specifically designed to cover concrete flooring.

Polished concrete floors also have downsides. Some homeowners, for example, might dislike the coldness of the material (though area rugs can help warm up the space). Concrete floors are also hard, which isn’t always ideal for children and pets. What’s more, these floors are susceptible to cracking, and repairs can be costly. Some homeowners might not like that installation isn’t DIY-friendly. 

There are many benefits to painting a garage floor, especially if you use an epoxy floor coating . In general, paint makes your garage easier to clean. Since concrete is porous, it tends to absorb things like dirt, grime, mildew, oil, and grease. Paint—specifically epoxy-based paint—creates a barrier that helps you easily mop up the mess before it stains or is difficult to remove.

Exterior paint finishes come in a variety of options, but for concrete, your best bet is to go with an eggshell, satin, or semi-gloss latex paint. All three options are more durable than matte finishes and should help hide imperfections on your home’s concrete surface.