white concrete after what appears to be muratic acid

Pressurized

New member
I want to start by saying happy easter!

I went and looked a a job yesterday at a store where someone cleaned just the enterance's with a pressure washer and muratic acid. Well it left it all discolored, enterances being normal concrete color with some yellowish places (not normal) and the rest of the concrete white. What can I use to make this all white again? I tried spraying bleach through a pump up sprayer on it and it only seemed to lighten it up a very very little. Thanks in advance!
 

Russ Johnson

Equipment Expert
Hydrofluoric and sulfuric acid mixed. A good strong aluminum brightener (both acids in the 8% to 10% range) cut 1:2 and misted over the entire area should make the color a uniform white.

Be extremely careful with acids, especially HF (hydrofluoric acid).

Anyone using HF should download and print the attached document. It is standard medical procedures to treat HF exposure. Many emergency medical staff have no idea what to do for it. Keep a copy in your truck, and take it to the hospital with you just in case.

View attachment HF_medical_book.pdf

Although HF is a greater hazard than other chemicals, it does things nothing else can do in certain circumstances. Just respect it for what it is, and use it appropriately.

Neutralize the area with a dilute soda ash solution.
 

Pressurized

New member
THANK YOU, now let the chemical hunt begin. So 1 gal (.5gal hf +.5gal sf) and 1 gal water in pump sprayer, or 1 gal hf and 1 gal sf?
 

Russ Johnson

Equipment Expert
THANK YOU, now let the chemical hunt begin. So 1 gal (.5gal hf +.5gal sf) and 1 gal water in pump sprayer, or 1 gal hf and 1 gal sf?


The acids are already blended in the aluminum brightener. You don't want to be messing with either in its raw strength. 1/2 gal aluminum brightener in 1 gallon water.
 

Russ Johnson

Equipment Expert
Although I'd love to sell you some, you'd be better off buying a small quantity like a gallon from a local source.
Anything shy of a drum isn't a feasible purchase. HF must be truck freight shipped, the package services won't touch it in any quantity.
A drum would run $130 - $160 or so to ship...so is a gallon...or a fiver. Even if you pay $25.00 for a gallon locally, you'd obviously still save a ton.
If you washed fleets or had lots of concrete whitening to do, I'd welcome your business with open arms.
 

Pressurized

New member
I really appreciate you looking out for me, and now that I know about your store I will bookmark it for future purchases. So I just need to go to an auto parts store and ask for some aluminium brightener or do you think they wold have it.
 

Christopher

Moderator
Contact your local pressure washing supplier if you have one.

The hardware stores and auto parts stores will not have the commercial grade chemicals and equipment you need to run a commercial business.

If you don't have a local pressure washing supplier (not a box store) then the vendors on this site will happily take your order and get you the professional grade supplies you need.

As for chemicals, if you don't have a local supplier, you will have to order a larger quantity FROM A REPUTABLE VENDOR, NOT ALL VENDORS ARE REPUTABLE WHEN IT COMES TO CHEMICALS AND DETERGENTS.

There are some threads on the site talking about some of the great chemicals from some of the vendors here, Russ J., Brad J. are some that have great chemicals.
 

Pressurized

New member
Thanks Chris and Russ, there is not a local supplier here or in the state for that matter that I know of.... closest thing is in memphis. So lots of ordering and minimum order stuff.... I would love to keep it in the community
 

Pressurized

New member
Although I'd love to sell you some, you'd be better off buying a small quantity like a gallon from a local source.
Anything shy of a drum isn't a feasible purchase. HF must be truck freight shipped, the package services won't touch it in any quantity.
A drum would run $130 - $160 or so to ship...so is a gallon...or a fiver. Even if you pay $25.00 for a gallon locally, you'd obviously still save a ton.
If you washed fleets or had lots of concrete whitening to do, I'd welcome your business with open arms.

Found some today will try tomorrow


Sent from my DROIDX using Tapatalk 2
 

apple

Moderator
Thanks Chris and Russ, there is not a local supplier here or in the state for that matter that I know of.... closest thing is in memphis. So lots of ordering and minimum order stuff.... I would love to keep it in the community

Try Harcros in Little Rock

Sent from my C771 using Tapatalk
 
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