How to Polish a Rough Concrete Floor

Concrete floors are rough and gritty. Sweeping un-polished floors stirs up dust and the floors never seem clean. Polishing the rough concrete gives the concrete a smooth texture. In addition, a smooth concrete is easier to maintain than rough concrete. Polishing the rough concrete seals the pores on the concrete, reducing stains and creating a more washable surface.

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Rough concrete floor

Step 1

Seal cracks and joints with epoxy filler. Use a small trowel and press the epoxy filler into joints and all cracks. Smooth the edges so they are level with the floor. Allow the epoxy filler to dry according to the manufacturer's directions on the container of the epoxy filler.

Step 2

Place a dust mask over your mouth and nose before you begin polishing rough concrete.

Step 3

Place the 40-grit diamond polishing pad on the concrete polishing machine. Start from the furthest corner of the room and work slowly in 6 foot by 6 foot sections to polish the rough concrete floor. Repeat with 80-grit and then 150-grit metal-bonded diamond polishing pads. Use a hand-held polishing machine to polish edges with each grit.

Step 4

Fill a pump sprayer with concrete hardener. Start from one side of the floor and spray a fine mist of concrete hardener on the entire floor. Allow the floor to dry according to the manufacturer's directions on the concrete hardener label.

Step 5

Place a 200-grit diamond polishing pad on the concrete polishing machine. Start from the furthest corner of the room and work slowly in 6 foot by 6 foot sections to polish the concrete floor. Repeat with 400-grit, 800-grit, and then 3000-grit resin-bond polishing pads. Use a hand-held polishing machine to polish edges with each grit.