Concrete Cleaner Pressure Washing Chemical

Concrete Cleaner for Pressure Washing -- Breaks Down Oil, Grease, and Organic Stains

If you clean concrete for a living, you already know that pressure alone doesn't cut it on oil stains, tire marks, and baked-in grime. This concrete cleaner is a contractor-grade degreaser that breaks those stains down chemically so your surface cleaner and rinse actually lift them out of the pores. Apply it, let it dwell, and wash it off. The concrete comes out looking like new instead of just wet and rearranged.

Available in 1 gallon, 4 gallon, and 5 gallon jugs, plus 55 gallon drums for crews running through chemical every week. The larger sizes cut your per-gallon cost significantly, and most contractors find 5 gallons covers a full week of driveway and flatwork jobs.

What This Concrete Cleaner Does

This is an alkaline-based degreaser formulated specifically for concrete, pavers, brick, and masonry surfaces. It attacks the three things that make concrete look terrible: petroleum-based stains (oil drips, transmission fluid, hydraulic leaks), organic growth (algae, mildew, moss that darkens shaded areas), and general traffic grime (tire marks, foot traffic, dirt ground into the surface).

The alkaline formula works by breaking the molecular bonds that hold grease and oil to the concrete surface. Once those bonds break, your pressure washer flushes the loosened grime right out of the pores. Without a chemical pre-treat, you are just pushing contamination around with water pressure and hoping for the best.

How to Use Concrete Cleaner on a Pressure Washing Job

Getting results from a concrete cleaner comes down to the right dilution, enough dwell time, and proper rinsing technique. Here is the process most contractors follow:

Step 1: Blow Off Loose Debris

Use a leaf blower or broom to clear leaves, dirt, and loose material off the concrete before you apply anything. Chemical sitting on top of a leaf does nothing for you. You want the cleaner making contact with the actual concrete surface.

Step 2: Pre-Wet the Surface

Hit the concrete with plain water first. A dry slab absorbs chemical too fast and you'll use more product than you need. A damp surface lets the cleaner spread evenly and stay active longer.

Step 3: Apply the Concrete Cleaner

Downstream the cleaner through your pressure washer's chemical injector using a black soap nozzle tip, or apply it with a pump sprayer for heavier coverage on stained areas. For general cleaning, follow the label's dilution ratio. For heavy oil stains, use a stronger mix and apply directly to the stain.

Step 4: Let It Dwell

Give the chemical 5 to 10 minutes to work. You'll see the surface start to darken as the cleaner pulls contamination up out of the pores. On hot days, mist the surface with water if the chemical starts drying before you rinse -- you don't want it to dry on the concrete.

Step 5: Agitate Stubborn Spots

For old oil stains or heavy buildup, hit the spot with a stiff deck brush while the cleaner is still dwelling. The mechanical agitation combined with the chemical action is what breaks up stains that have been soaking into concrete for months or years.

Step 6: Rinse With Your Surface Cleaner or Wand

Run your surface cleaner over the entire slab, working in overlapping passes. The chemical has already done the hard work of loosening the grime -- your machine just needs to flush it off. You'll notice the water running off is dark at first, then clears up as the concrete comes clean.

Step 7: Post-Treat If Needed

Some contractors follow up with a sodium hypochlorite rinse to kill any remaining organic growth and brighten the concrete. This is optional but gives you that extra pop of clean that customers notice.

Dilution Ratios for Concrete Cleaning

Always follow the product label for exact ratios. When in doubt, start lighter and increase concentration if the first pass doesn't get it done. Using more chemical than you need wastes product and can leave residue that's harder to rinse off.

Where Contractors Use This Concrete Cleaner

This isn't a consumer-grade spray bottle cleaner. It's formulated for the volume and intensity of commercial pressure washing work. Here are the most common applications:

• Residential driveways: Oil drips from vehicles, tire marks, and general weathering. The bread and butter of most pressure washing businesses.
• Commercial sidewalks and entryways: Foot traffic grime, gum residue, and spilled beverages on concrete outside retail stores and offices.
• Restaurant and bar patios: Grease splatter, food stains, and organic growth on outdoor dining areas.
• Gas station pads: Petroleum stains from fuel spills and vehicle leaks. These are some of the toughest stains you'll encounter.
• Loading docks and warehouse floors: Hydraulic fluid, diesel, and heavy equipment grease ground into industrial concrete.
• Parking garages: Accumulated vehicle fluids and tire marks across large concrete surfaces.
• Pool decks and patios: Algae, mildew, and sunscreen residue on textured concrete.

Concrete Cleaner Specifications

Tips From Contractors Who Use This Product

Don't skip the pre-treat. The single biggest mistake new pressure washers make on concrete is skipping the chemical step. You can run a surface cleaner over a driveway for an hour without chemical and still leave stains behind. Five minutes of dwell time with the right cleaner saves you 30 minutes of extra passes with the machine.

Work in sections. On large slabs, apply chemical to one section at a time so it doesn't dry before you rinse. Most contractors work in 10-by-10-foot sections on hot days and larger sections when it's cooler or overcast.

Test on a small area first. Especially on colored or stamped concrete, test the cleaner in a hidden corner before committing to the entire surface. Alkaline cleaners are safe on standard gray concrete, but some decorative finishes can react differently.

Keep overspray off landscaping. Pre-wet any plants, grass, or mulch beds adjacent to the concrete before you apply chemical, and rinse them again after you finish. The diluted runoff is generally not a problem, but concentrated overspray can burn foliage.

Frequently Asked Questions

Will this concrete cleaner remove old oil stains?

It will significantly lighten most oil stains and completely remove many of them. Stains that have been soaking into concrete for years may need two applications with agitation between passes. Some very old petroleum stains leave a shadow that no chemical can fully remove because the oil has permanently discolored the concrete. Set realistic expectations with your customers -- improvement is the goal, not always perfection.

Can I use this in a downstream injector?

Yes. Dilute according to the label and pull it through your downstream chemical injector using a black soap nozzle tip. For heavier applications, a pump sprayer gives you more control over concentration and coverage.

Is this safe on stamped or colored concrete?

Test a small area first. Standard gray concrete handles alkaline cleaners without issue. Colored sealers and stamped concrete finishes vary, and some can be affected by strong alkaline solutions. When in doubt, dilute more and test.

How much do I need per driveway?

A typical two-car residential driveway (400 to 600 square feet) uses roughly 1 to 2 gallons of diluted solution, depending on soil level and dilution ratio. A 5 gallon jug of concentrate makes enough diluted solution to cover multiple driveways in a day.

Can I mix this with bleach (sodium hypochlorite)?

Do not mix cleaning chemicals together. Apply the concrete cleaner first, rinse it off completely, then apply your SH solution as a separate step if needed. Mixing chemicals can create dangerous fumes or neutralize both products.

Does this work on pavers and brick?

Yes. The formula is safe on concrete, pavers, brick, and natural stone. It's particularly effective on paver patios where organic growth gets into the joints and oil stains darken high-traffic areas.

Related Products

• All Concrete Cleaning Chemicals
• Surface Cleaners for Flatwork
• All Pressure Washing Chemicals
• Nozzle Tips (including soap nozzles)
• Pressure Washer Hoses
• Guns and Wands

Pair it with a surface cleaner to knock out driveways and large slabs twice as fast.