How to Resurface a Concrete Counter
- 1). Remove any loose or broken bits of concrete. For sealed countertops, use a hand-held concrete grinder to remove existing sealer.
- 2). Tape off surrounding areas to prevent concrete from spilling over into unwanted areas.
- 3). Fix any cracks or holes by filling it with concrete resurfacer. Concrete resurfacer is good for hairline cracks no wider than 1/8 inch. For cracks as wide as 1/2 inch, squeeze in concrete repair caulk using a caulking gun. Smooth out the cracks and holes with a putty knife. Allow to dry.
- 4). Mix the concrete following the manufacturer's directions. Pour the mix into a plastic work bucket. There are specialized concrete mixes for concrete countertops. A well-graded aggregate mix will reduce shrinkage and increase strength. Self-consolidating concrete blends are ideal for diamond polishing and are very durable.
- 5). Spread the concrete mix using a trowel. Smooth over the surface evenly by pressing hard onto the counter.
- 6). Remove the tape, and let the concrete dry for 24 hours. The countertop can also be "wet-cured" by covering it with plastic. This process will take about a week to dry, but the countertop will be more durable. Use the concrete grinder to further smooth the countertop, if necessary.
- 7). Seal the surface with epoxies, penetrating silicone-based materials, urethanes, waxes, acrylics or silicates. When choosing a sealer, consider factors such as high temperatures, stain and acid resistance, ability to repel oil and ultraviolet radiation.
