Need Help Getting Red Clay Dirt Stains Out

[RICHARD A.]

I need some good info on getting red clay dirt stains out of concrete. thanks! Richard A.

 

[ron p]

you can

check out www.powerwashdirect.com RED DOG
It will etch glass so i will guess it either has buffered muratic acid in it or buffered hydrofloric acid in it.
I have used both acids before and they will work. Be carefull on cement less then 1 year old.