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Whether it's better to stain or paint concrete depends on your budget, desired aesthetic, and DIY skill level. Generally, staining is a more durable option because the stain soaks into the concrete's surface and won't wear away like a topical paint coating. Painting concrete can trap moisture underneath the paint layer, which may cause the concrete to deteriorate over time. However, concrete paint offers a wider variety of colors, is typically easier and less expensive to apply, and is effective at covering up existing stains or blemishes on the surface.

Yes, you can seal an old concrete floor as long as you remove stains and repair damage before sealing. Remove everything from the garage and clear the floor throughout with a concrete cleaner and power washing. Fill in cracks larger than 1/8 of an inch wide and remove all grease and rust stains before sealing. Make sure your concrete is fully dried before applying sealer.

It typically takes 1-2 days to coat a concrete floor, including preparation and curing time.

Polished concrete gets its glass-like finish from several rounds of polishing, using increasingly finer grit diamond grinding pads. The concrete’s hardness will determine which grits you need to get your desired finish. The densifier and sealer also contribute to the look of the final floor, so either talk to a concrete pro (or hire one) to achieve the right concrete floor finish.