Quick Answer

Yes, a floor buffer can polish concrete, but only for the finishing resin passes, not the grinding phase. Use resin pads starting around 800-1500 grit, run the buffer at 1500-3000 RPM, keep the floor clean, and work in overlapping passes. A buffer lacks the weight and speed to grind, so use a floor grinder for anything coarser than 800 grit.

What a Buffer Can and Cannot Do

A standard floor buffer spins a pad at high speed and low pressure. That is perfect for refining and burnishing: the fine resin passes (800-3000 grit) and the final gloss. It cannot profile concrete or remove coatings because it has no weight and no aggressive metal tooling. Try to grind with a buffer and the pad glazes while the high spots stay untouched.

Pad Choice and Speed

Use resin pads for concrete, such as diamond resin floor polishing pads, sized to the buffer's pad driver. Start at the finest grit that matches the floor's existing finish; 800 or 1500 are common starting points. Run the buffer at medium-to-high speed and keep it flat. For the final gloss, switch to a burnishing or white pad and run it dry.

Technique on the Floor

Clean the floor with a vacuum and damp mop before buffing; any grit under the pad scratches the surface. Move the buffer in overlapping passes, roughly half the pad width per pass, and keep a steady rhythm. Do not let the buffer dwell in one spot, which overheats the resin and leaves a dull burn mark. On edges and under cabinets, use a smaller rotary buffer or hand pad.

Know When to Use a Grinder Instead

If the floor has visible scratches, coatings, or high spots, a buffer will not fix them; those need a floor grinder with metal bond tooling first. The buffer is the final-stage machine: it refines and shines an already-prepared floor. Matching the machine to the stage is what produces a clean, even gloss.

Frequently Asked Questions

Q: What RPM should I run the buffer at for concrete?

A> For resin pads, 1500-3000 RPM works; for burnishing, the fastest setting your buffer has. Slower machines need more passes.

Q: Can I use a floor buffer to grind down a high spot?

A> No. High spots need a floor grinder with metal bond segments. A buffer will polish the high spot, not remove it.

Q: Do I need a special pad driver for concrete pads?

A> Yes, resin pads mount on a driver that fits the buffer. Match the driver size to both the buffer and the pad brand.

Conclusion

A floor buffer earns its place in the finishing stages of every polish job: clean the floor, run the right resin grits, and burnish to gloss. Leave the grinding to the grinder and the buffer will shine the floor fast.