Oxalic acid question

[B Spring]

I have a customer who I'm trying to get his parking lots as white as I can, so I bought some oxalic acid, because I heard it helps whiten concrete, does anybody know what the mixture for this is?

 

[Ralph Q]

Start with 12 oz's per gallon. Bump it up if it doesn't achieve the desired effect. mix it in warm water.












Ralph.
Pressure washing Oldsmar

 

[jhag1]

What he said. Warm water.

 

[814jeffw]

Also,..you won't see the real results until it completely dries out. This came up a few years ago,..and the guy went back to re-treat it and it was nice and white.

I tend to put it on a wet surface and leave it? Although,..depending on the immediate foot traffic an area may see,..I will rinse it in some instances.

Jeff

 

[B Spring]

Do you downstream it, or using a pump?

 

[junker1]

I use a 12volt pump for oxalic.

 

[814jeffw]

Either can be effective,..much depends on the job at hand.

Jeff

 

[al9226]

Also if you don't get it on evenly the concrete can come out blotchy. Don't ask me how I know.


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[B Spring]

Ok I appreciate the help, I bought 2 bags and didn't know how to mix it