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How do you remove stains from the garage floor?

GarageFloor.jpegI suggest using Chemtech 1L Concrete And Driveway Cleaner. It is biodegradable and non-toxic and does not affect plastic, rubber, glass, and most metals. Please note that this is a concentrate and must be diluted in water. Use a stiff bristle brush broom to remove dirt and debris while using Chemtech.


After brushing the garage, I recommend using a pressure washer to remove deep-seated dirt. This will wash out all the dirt and contaminants on your floor. If you decide to paint it, I suggest using White Knight Ultra Pave Garage Floor Primer and  White Knight 4L Medium Grey Ultra Pave Quick Dry Paint. for a quick refresh of the garage floor.


Here is a handy step-by-step guide: How to paint concrete floors. - EricL

We decided to hire someone professional who will use the pressure washer with degreaser. However, we enquired a few of these people about the pressure wash process and they all say even with pressure cleaners some stains will remain on the floor. - ivanptr

Some stains like paint and grease stains are very hard to remove. You will only be able to find out once you give it a very good clean. If after using the cleaning products there are still paint stains on the floor, you will have to use a steel scraper to remove them.


For heavy oil and grease stains, I suggest using CLR 750ml Oil And Grease Remover. With an older age of the floor, some stains will be difficult to remove. Once the floor is totally clean and dry, you can then see what is left and determine if you can paint over them.


With the majority of stains and marks removed and a pressure washer used, that would remove all loose dirt and debris. From there, I recommend either painting the floor or do an epoxy garage floor project. Either method will give you good results and a strong cover from future stains.


White Knight 4L Medium Grey Ultra Pave Heavy Duty Concrete And Paving Paint does not require a primer. You can paint this directly onto your garage floor. There is no need to use the White Knight Ultra Pave Garage Floor Primer.


The other garage paint options are the Dy-Mark 4L Water-Based Grey Epoxy Coat Garage Floor Kit and the Garage & Factory Floor Protector 10L Charcoal. But among the three the White Knight is the easiest to apply. - EricL

Just Starting Out

hi any final images of how it looked after all the hard work... 

Bunnings Team Member
Bunnings Team Member

Welcome to the Bunnings Workshop community @MicaCleaning. It's brilliant to have you join us, and many thanks for your question.

This Best Advice article is a contribution of helpful tips provided by our members. The image used is from @ivanptr's discussion on How to clean a garage floor. Within that discussion, you'll see their finished result.


Do you have a garage floor that needs cleaning? If so, you might like to provide some images so our helpful members have a better idea of solutions they could suggest.


We look forward to hearing all about your projects and plans around the house and garden and encourage you to let us know any time you need assistance or have something to share.


Retired Team Member
Retired Team Member

Those who are looking for more information on cleaning your garage floor may also like to check out resident D.I.Y. expert @EricL's guide How to remove stains from garage floors for step-by-step instructions. 


Please don't hesitate to reach out should you have more questions. Our wonderful Bunnings Workshop community members are here to help.




Having an Impact


Hi All 

I have similar issue in my car port but am a bit hesitant to use chemicals as the run off would go into part of garden. Will the chemicals recommended here be ok if they got into the garden?


Bunnings Team Member
Bunnings Team Member

Hello @Puddin 


Allow me to give the supplier a call regarding the Chemtech 1L Concrete And Driveway Cleaner and find out if it's safe for plants. As soon as we have more information, I'll get back to you.


Thank you for your patience.




Having an Impact



Thanks Eric 

Really appreciate you following this up. 

Cheers Ann

Bunnings Team Member
Bunnings Team Member

Hi @Puddin 


I have spoken with the supplier's technical team who've told me that Chemtech 1L Concrete And Driveway Cleaner is suitable for use around plants, but they advise a few simple steps to help protect them.


Their advice was to mix the product to a 10:1 ratio, 10 parts water, 1 part product. If the product is used unmixed, you may run into some issues.


Thoroughly wet down any surrounding plants and green life before application of the product and then hose them down after use.


If these steps are followed, you should have absolutely no issues.


Let me know if you have any further questions.




Having an Impact



Thanks Jacob


Really good to get such a quick response you guys are great. Will try it and post how it goes, may not be for a week or two though. 


Cheers Ann 

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