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Concrete with tar how to remove it?

Mike Fox

New member
This is a concrete balcony on a commercial building. They want to start using this outdoor area. Looks like tar paper asphalt and tar were on it for quite a while. The tar paper/asphalt will be removed prior but they want the concrete cleaned. Any suggestions on best method to clean this?

60 x 20 ft

Thanks
 

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Jim Cooney

New member
Re: Concrete with tar

I've removed tar successfully, but more times than not the concrete will remained stained. If the customer is expecting like new concrete look, pass on it.
 

cleanhoods

New member
Re: Concrete with tar

After you clean the concrete to cover the stain use concrete stain to cover the stain.Hope this makes sence,lol.
Marko:biggrin:
 

Mike Fox

New member
Re: Concrete with tar

Follow up. I am planning on painting this concrete balcony. I cleaned off all the asphalt and steam cleaned the concrete. There are still some areas that are holding tar and oils in the concrete. I know this because when wet some areas have beading water. Any suggestions for removing this before I paint it?

Thanks
 

Jim Cooney

New member
Re: Concrete with tar

Any areas left that still contain oil or petroleum products will make any coating you plan to apply fail.

Is the oil pumping up out of the concrete, or is it all on the surface ?
 
Re: Concrete with tar

You need a product like ASTEC Bcs-4 spec which is compatible with the tar/asphalt emulsion, best use ASTEC ASPHALT primer, etc, there are certified astec installers across the country
 
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