Beginner’s Guide to Concrete Polishing: Process, Finishes & Costs

Concrete polishing mechanically grinds, hones and refines a concrete slab with progressively finer diamond abrasives to create a smooth, durable finish. Unlike a grind and seal concrete floor, it does not rely on a topical coating to create its shine.

Polishing concrete entails much more than just the use of the grinding machine. There are several factors such as slab condition, aggregate exposure, gloss level, and equipment used that play an important role in this procedure.

In this article, we will look at the process of concrete polishing, types of finishes, tools and steps involved, common mistakes, and what influences the costs.

What Is Concrete Polishing?

Concrete polishing is a multi-staged mechanical process that uses diamond-embedded abrasives, run in progressively finer stages, to smooth and refine a concrete surface until it reaches the required sheen. Depending on the slab and the stages used, a chemical densifier may also be applied to harden the surface.

Not every smooth or shiny concrete floor has actually been mechanically polished. A floor that’s been ground and coated with a topical sealer can look glossy too, but it’s a different system with different maintenance needs, worth understanding before you compare quotes.

Concrete Grinding vs Honing vs Polishing vs Grind & Seal: What’s the Difference?

Grinding removes material and flattens or prepares the surface. Honing continues refining it with finer abrasives to bring down the sheen level. Polishing carries that mechanical refinement further again, to reach the required smoothness and reflectivity. Grind and seal take a different path: the surface is ground, then finished with a topical coating, so the final look and feel depends heavily on that coating rather than on the concrete itself.

Process	Purpose	Result
Concrete grinding	Remove coatings, flatten and prepare	Coarse to refined surface
Concrete honing	Progressively refine the surface	Smooth, lower-sheen finish
Concrete polishing	Continue mechanical refinement	Smooth to highly reflective
Grind and seal	Grind, then apply a topical coating	Matte, satin or gloss, depending on coating

These terms get used interchangeably, but they’re different stages. Neither polishing nor grind and seal is universally “better”. The right choice depends on your existing slab, the look you want, how the space is used, and your maintenance expectations.

What Finish Can You Achieve with Polished Concrete?

Choosing a polished concrete finish involves two visual decisions: how much aggregate is exposed and how much sheen the finished floor has.

Concrete Aggregate Exposure Levels

The depth of grinding determines how much stone within the slab becomes visible.

• Cream finish: Minimal grinding leaves little or no aggregate exposed. The result depends heavily on the original slab placement and finishing quality.
• Salt-and-pepper exposure: Light grinding reveals fine aggregate for a subtle decorative appearance.
• Medium exposure: Deeper grinding exposes more stone and creates a stronger decorative character.
• Full exposure: Significant grinding reveals larger aggregate for a bold, distinctive finish.

Sheen ranges from a practical low-sheen finish through satin and polished up to high gloss, which needs the greatest degree of surface refinement.

Sheen level	Appearance
Low sheen	Subtle reflection
Satin	Soft light reflection
Polished	Clear reflectivity
High gloss	Highly reflective

Can Your Existing Concrete Floor Be Polished?

Many existing concrete floors can be polished, but it depends on the slab’s condition, any previous treatments, and how much repair work it needs. Cracks, old adhesives, paint, coatings, oil staining and general unevenness all affect what’s achievable and how much preparation is required first.

It’s worth setting realistic expectations too. An existing slab won’t always polish up to look exactly like a reference photo, because the original concrete mix, aggregate distribution and any past repairs all influence the final result.

A proper on-site assessment before work begins is the only reliable way to know what your floor can achieve.

How to Polish Concrete Floors: Step-by-Step Process

The exact process varies according to the slab’s condition, hardness, existing coatings, required aggregate exposure and desired sheen. However, the following stages explain how to polish concrete professionally.

Step 1. Choose the Required Tools and Equipment

Professional concrete floor polishing typically requires a planetary floor grinder, edge grinder, industrial dust extraction system and appropriate diamond tooling. Depending on the floor, concrete repair products, densifier, protective treatments and burnishing equipment may also be needed.

Tool or Material	Purpose
Planetary floor grinder	Grinding, honing and polishing main areas
Edge or hand grinder	Working around edges and corners
Metal-bond diamonds	Initial grinding and surface preparation
Resin-bond abrasives	Honing and refining the concrete
Industrial dust extractor	Controlling dust during dry grinding
Repair products	Treating suitable cracks and surface defects
Concrete densifier	Supporting surface hardening and polishing
Burnisher and pads	Enhancing the final finish where required

Simply hiring a grinder is not enough. Concrete hardness, coatings, aggregate exposure and desired sheen influence the choice of machinery and abrasives.

Step 2. Assess the Concrete Slab

Inspect the floor for coatings, contamination, cracks, damage and uneven areas. The assessment helps determine the required preparation and suitable finish.

Step 3. Prepare the Area and Remove Existing Flooring

Carpet, tiles, adhesives, paint and old coatings may need removal. Proper site preparation and appropriate safety controls are essential before grinding begins.

Step 4. Complete the Initial Concrete Grinding

A floor grinder fitted with suitable metal-bond diamond tooling removes surface irregularities and unwanted coatings. Grinding may also expose aggregate where required. The starting grit varies according to the floor.

Step 5. Repair Cracks and Surface Imperfections

Suitable cracks, holes and surface defects are repaired using products compatible with the polishing system. Existing cracks cannot always simply be “removed”, so realistic expectations matter.

Step 6. Continue Grinding and Refining

Progressively finer abrasives refine the surface and remove scratch patterns left by earlier stages. Rushing or skipping stages can produce an inconsistent finish.

Step 7. Apply Concrete Densifier Where Appropriate

A concrete densifier penetrates the surface and chemically reacts within the concrete to help increase surface hardness and support further polishing.

Step 8. Hone and Polish the Concrete

Resin-bond abrasives progressively refine the floor until the desired sheen is achieved. There is no universal grit sequence because each slab and finish has different requirements.

Step 9. Apply Final Protection and Buff Where Required

Depending on the polishing system and intended use, suitable stain protection or other compatible treatments may be applied before final burnishing and inspection.

What Grit Is Used to Polish Concrete?

There is no universal grit sequence for polishing concrete floors. The appropriate starting and finishing grits depend on the slab condition, concrete hardness, coatings, required aggregate exposure and desired sheen.

Coarse abrasives are generally used for initial grinding and preparation. Progressively finer abrasives then refine scratch patterns, hone the surface and increase clarity and reflectivity.

The important principle is progression: each stage should properly prepare the floor for the next rather than following one fixed sequence for every project.

Can You Polish Concrete Yourself?

DIY concrete polishing is possible for small, straightforward areas. But a consistent, genuinely polished finish depends on specialised machinery, the right diamond tooling, effective dust control and experience reading how a slab responds as you go.

Consideration	DIY	Professional
Equipment	Hired, limited options	Commercial-grade machinery
Finish consistency	Harder to control	Greater process control
Dust management	Requires your own controls	Established systems
Best suited to	Small, simple areas	Larger or finish-critical floors

Concrete grinding produces respirable crystalline silica dust regulated by the Model Work Health and Safety Regulations. No matter whether you hire or do it yourself, proper dust removal and personal protective equipment (PPE) are not a luxury. WorkSafe WA provides current information about respirable silica dust, which should be read prior to any grinding works.

How Much Does Concrete Polishing Cost in Perth?

Concrete polishing in Perth generally falls between $50 and $150 per square metre, with premium mechanical finishes running from around $115 to $220 per square metre depending on your slab’s condition and the exposure level you’re after.

The main cost factors include:

• floor size and condition;
• existing flooring or coating removal;
• cracks and repairs;
• site access;
• desired aggregate exposure;
• required sheen;
• overall project complexity.

Two floors of the same size can still land on very different quotes, mostly because of what’s underneath the surface rather than the size of the job. Crack repair, old coating removal, slab condition and the finish you want affect labour and material costs more than square metreage alone.

For a full breakdown, see our guide to polished concrete cost in Perth.

6 Common Concrete Polishing Mistakes

• Failure to perform slab assessment. Unidentified cracks or contaminants surface as defects.
• Wrong diamond tooling. Using inappropriate diamond bond or grit on the slab reduces the rate of work and damages the concrete surface.
• Skimming through the grit phases. Each phase should thoroughly eliminate the scratch marks from the previous phase or the scratch marks remain.
• Not addressing cracks or contaminants. They prevent proper densification and manifest as patchy areas.
• Neglecting dust disposal. Remaining dust harms health and the finishing process.
• Expectation of similar appearances in all slabs. Aggregate distribution and past repairs affect the finishing.

How to Maintain Polished Concrete Floors

Clean the floor by sweeping or dust mopping on a regular basis. Use a pH neutral cleaning agent for a damp mop as required. Avoid using harsh and acidic chemicals unless recommended for your specific floor finish and use entrance mats to reduce grit from entering your floor. In case of loss of shine in your floor, consult a professional immediately.

FAQs About Concrete Polishing

• Is it expensive to polish concrete?

The cost depends on floor size, slab condition, preparation, repairs and required finish. Floors requiring extensive coating removal or deeper aggregate exposure generally involve more work.

• How to buff concrete floors?

Buffing, or burnishing, refers to the final high-speed burnishing stage, using fine resin or non-diamond burnishing pads (1,500–3,000+ grit) to bring the surface to its final gloss level after the main grinding and polishing stages are complete.

• Are polished concrete floors slippery?

Not inherently. Slip resistance depends more on surface contamination, moisture and use than gloss level, and anti-slip treatments are available where needed.

• Does polished concrete need to be sealed?

It depends on the system. Some floors rely on densification alone, while others benefit from a penetrating stain protection layer, different from the topical coating used in grind and seal.

• How long will polished concrete last?

With proper installation and regular maintenance, polished concrete floors can last for decades. Their lifespan depends on the quality of the concrete, polishing process, foot traffic, maintenance and exposure to damage.

Get Professional Concrete Polishing in Perth

Not sure whether your existing slab is suitable for polishing or which finish to choose?

With over 15 years of experience, Infinity Flooring provides concrete grinding, polishing and restoration for residential and commercial properties across Perth. We assess your floor on site, explain the available options and provide a clear written quote before work begins.

Book your free site assessment and find the right approach for your concrete floor.