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#4686702 - 03/06/18 07:31 PM Rust stain removal on concrete?
motor_oil_madman Offline


Registered: 11/29/09
Posts: 4860
Loc: Houston, Texas
I'm going to be pressure washing a driveway tomorrow and it has a few time sized rust spots from fertilizer and probably rebar. I have a 4000psi power washer. Will this do the job or is their something else I can use to take the rust off.
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2007.5 dodge cummins 6.7 liter. Chevron Delo400 15w40. 7000 mile or 250-300hr intervals.


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#4686717 - 03/06/18 07:36 PM Re: Rust stain removal on concrete? [Re: motor_oil_madman]
Linctex Offline


Registered: 12/31/16
Posts: 6178
Loc: Waco, TX
Originally Posted By: motor_oil_madman
I have a 4000psi power washer. Will this do the job?


Yes, probably

If it doesn't - try a little bit of VERY diluted muriatic acid after pressure washing it
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#4686736 - 03/06/18 07:52 PM Re: Rust stain removal on concrete? [Re: motor_oil_madman]
motor_oil_madman Offline


Registered: 11/29/09
Posts: 4860
Loc: Houston, Texas
If it only takes a little bit of acid. I wonder if coca cola would be enough. Just get a 20 oz bottle then pour on the rusty areas and let.ot soak until I get to it with the pressure washer.
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#4686828 - 03/06/18 08:49 PM Re: Rust stain removal on concrete? [Re: motor_oil_madman]
ZeeOSix Offline


Registered: 07/22/10
Posts: 17795
Loc: PNW
I've got some rust stains from moss killer. If the Coca Cola works, let us know.

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#4686938 - 03/06/18 10:22 PM Re: Rust stain removal on concrete? [Re: motor_oil_madman]
Reddy45 Offline


Registered: 08/15/08
Posts: 2973
Loc: USA
4000psi will take care of it. My 3200psi cleans rust just fine (with the proper nozzle).

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#4686987 - 03/06/18 11:20 PM Re: Rust stain removal on concrete? [Re: motor_oil_madman]
Marco620 Offline


Registered: 02/25/14
Posts: 2195
Loc: Deplorable Kansan,HK fan!
ExtraMuscle degreaser or TSP maybe.
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#4687065 - 03/07/18 06:04 AM Re: Rust stain removal on concrete? [Re: motor_oil_madman]
Sonic Offline


Registered: 03/07/11
Posts: 369
Loc: Midwest
I've used IRON OUT outdoor formula to clean rust stains from concrete as well as composite decking. Works well.

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#4687067 - 03/07/18 06:06 AM Re: Rust stain removal on concrete? [Re: motor_oil_madman]
demarpaint Offline


Registered: 07/03/05
Posts: 29803
Loc: NY
I've cleaned a lot of rust stained patios in my day. A bit of muriatic acid and a good pressure washer worked very well for me.
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#4687113 - 03/07/18 07:11 AM Re: Rust stain removal on concrete? [Re: motor_oil_madman]
SKVenture Offline


Registered: 03/21/17
Posts: 92
Loc: Philadelphia PA
If you use the muriatic acid, be sure to flush the area with low pressure water either with a pail or a garden hose. You donít want to stuff splashing all over you when you hit it with a power washer!

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#4687142 - 03/07/18 07:47 AM Re: Rust stain removal on concrete? [Re: motor_oil_madman]
BJD78 Offline


Registered: 08/05/17
Posts: 493
Loc: Nebraska
I like a few rust and oil stains on my driveway, gives it character. Over time the duo of sun shine and rain will fade the stains naturally.
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#4687289 - 03/07/18 09:44 AM Re: Rust stain removal on concrete? [Re: motor_oil_madman]
SHOZ Offline


Registered: 06/28/03
Posts: 5751
Loc: Illinois
Citric Acid is a great rust buster.
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2008 Hyundai Accent 1.6L 5 sp manual hatchback
2010 Hyundai Genesis Coupe Track 2L Turbo 6sp manual

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