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  1. #1
    phil wood is offline Registered User
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    Question rust on stucco

    any tips on chemical to use to remove rust from stucco? have used rust remover from home depo. need a cheaper gallon mixture. is it muratic acid?>?

  2. #2
    ron
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    if you had any HF [hydrofloric acid] based alum brightner and a high alk. based soap then you could 2 step it.
    im quite sure it will work.
    Oxalic acid is much safer and it by itself might do the trick.
    These acid's are not as harsh to the stucco as muratic.
    muratic eat's lime.
    The more you learn the more you earn! Thanks to everyone for their help.
    My motto '' Do it right or dont do it.''

  3. #3
    Everett's Avatar
    Everett is offline Registered User
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    Oxalic would be my choice also. I like it for just this reason, it is both a good wood brightener and rust remover.
    Everett Abrams
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  4. #4
    chirobob is offline Registered User
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    I use phosphoric acid @ 30 - 40% to remove rust. It is what is mostly used in commercial rust removers it turns the rust into iron diphosphide that is also impermeable to water and you can paint over it as well.

    Ron, I two stepped the other day on a rusty tipper it got it clean but the rust is back I used 2% HF on it , maybe the HF doesn't give it the protective film like Phosporhic acid does.

  5. #5
    chirobob is offline Registered User
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    Muriatic or Hydrochloric as it is also called will cause rust. DON'T use it to remove rust it will create more problems!

  6. #6
    Bill B is offline Registered User
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    If this is really dryvit, not stucco, go to the dryvit site. It will tell you to use sureclean 600, which is muratic acid based.


 

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