Oil and rust stain removal for concrete that pressure washing will not fix
Engine drips, fertilizer rust, sprinkler stains and furniture rings each need a specific treatment, not more water pressure. We identify the stain, treat it correctly and tell you up front what to expect.
Oil stain treatment on a driveway, Boulder County
Pressure does not remove oil or rust. Chemistry does.
Oil soaks into concrete. Rust bonds with it. Hit either one with a pressure washer alone and you spread the oil wider or burnish the rust in, which is why so many driveways have a faint gray smear where somebody tried. The stain has to be dissolved or lifted out of the pores, and the product that does that depends entirely on what the stain is.
We treat oil with degreasers and poultices that pull it out, and rust with removers that break the iron bond, then we rinse and neutralize so nothing keeps working on the concrete after we leave. We test first on colored, stamped or sealed surfaces, and we tell you honestly if a deep, old stain is likely to leave a shadow.
The stains we treat
- Engine oil, transmission fluid and power steering drips on driveways and garage floors
- Hydraulic and coolant spills from equipment and work vehicles
- Orange rust from sprinkler heads and well water overspray on sidewalks
- Rust rings from patio furniture, fire pits, grills and planters
- Fertilizer rust spots on driveways and walks
- Grease and food stains around grills, patios and commercial entries
- Battery acid and chemical etching, assessed and quoted for repair
Once a stain is out, a penetrating sealer is what keeps the next drip on the surface long enough to wipe up instead of soaking in.
What stain removal includes
A separate treatment for every stain type, whether it is one drip in Longmont or a row of parking stalls in Golden.
- Stain identificationOil, rust, organic and chemical stains all look alike from a distance and need different products. We identify each before treating.
- Test spot on finished surfacesColored, stamped, stained or sealed concrete gets a test spot first so there are no surprises.
- Degreaser or poultice for oilFresh oil gets a degreaser with dwell time. Deep stains get a poultice that pulls the oil out of the pores.
- Rust remover, then neutralizedRust is dissolved with a remover designed for concrete, then rinsed and neutralized so it stops working.
- Full surface cleaningAfter treatment the whole area is surface cleaned so the treated spot blends with the rest of the slab.
- Sealing to prevent repeatsA penetrating sealer keeps future drips and sprinkler water from soaking in. We quote it if it makes sense.
Why rust and oil stains are so common on the Front Range
Most Colorado sprinkler systems run on water with enough iron to leave an orange arc on every sidewalk they overspray, and lawn fertilizers with iron do the same in spots. Meanwhile the dry heat bakes every oil drip into the slab within weeks. By the end of a summer the stains are part of the concrete.
Treating stains in spring or early summer, before the heat sets them, gives the best results. Sealing afterward keeps them from coming back.
- Iron in the waterWell water and many municipal supplies carry enough iron to stain concrete orange wherever sprinklers overspray.
- Heat sets oilHigh altitude sun bakes drips in fast. A stain treated in May lifts far better than the same stain in September.
- Deicer opens the poresWinter magnesium chloride roughens the surface, which gives the next oil drip an easier path into the slab.
How stain removal goes
Four steps, and most jobs are finished in a single visit.
Photo and diagnosis
Text a photo of the stain. We can usually tell you what it is and what to expect from the picture.
Test and treat
Finished surfaces get a test spot, then each stain gets the product made for it with proper dwell time.
Rinse and neutralize
Treatments are rinsed and neutralized so nothing keeps working on the concrete, and the area is surface cleaned to blend.
Inspect and seal
We show you the result and, if it makes sense, seal the area so the next drip does not become the next stain.
Stain removal questions
The things people ask before they book. If yours is not here, text us a photo and ask.
Fresh oil and most rust stains come out completely. Oil that has soaked in for years gets dramatically lighter but can leave a faint shadow. We tell you which to expect from the photo, before you commit to anything.
Iron in the water. Every time the sprinkler oversprays onto the concrete and dries, it leaves a little more iron behind. We remove the stain, and adjusting the sprinkler head keeps it from returning.
Usually, yes. Rust removers can affect color, so we do a test spot first and choose a product that is safe for the finish. If there is any risk to the color, we tell you before we go further.
Pressure alone spreads oil and pushes it deeper. Oil has to be dissolved and pulled out of the pores with the right product, and then the area is cleaned. That is the difference between a stain gone and a bigger gray smear.
A penetrating sealer after treatment. It keeps drips and sprinkler water on the surface long enough to wipe or rinse away instead of soaking in. We can seal the treated area or the whole slab.
Services that go with it
Stain removal usually pairs with one of these.
Oil and rust stain removal near you
Based in Berthoud and working across Boulder, Larimer and Jefferson counties.
Boulder County
Larimer County
Not on the list? We take on jobs just outside these counties too. Send us the address and we will tell you quickly. All service areas
Get a stain removal quote by text, call or this form
A close up photo of the stain and a wider shot of the area gets you the fastest answer. We will tell you what it is and what to expect.
Request a free quote
We reply by text or email, usually the same day.
Residential and commercial. Serving Boulder, Jefferson and Larimer counties.