Help needed to remove grout haze

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redtileman

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Aug 22, 2008
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#1
Has anyone ever removed grout haze from Mapei CQ off of wood look porcelain tile? I tried hydrochloric acid and straight phosphoric acid both under a green pad using a 150 lb hawk brute with no success. Also tried a product called Bare Bones which I use to strip vinyl tile, it also had no effect.
 

MikeGaure

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Nov 23, 2015
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#2
Has anyone ever removed grout haze from Mapei CQ off of wood look porcelain tile? I tried hydrochloric acid and straight phosphoric acid both under a green pad using a 150 lb hawk brute with no success. Also tried a product called Bare Bones which I use to strip vinyl tile, it also had no effect.
do you have pics? acid should've worked
 

redtileman

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Aug 22, 2008
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It may be epoxy grout. It says sanded grout with polymer. Not sure if that means epoxy or not.
This stuff is in every one of these porcelain wood look tile nooks, crannies and crevices.
 

PistolPete

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Sep 28, 2014
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Peter Dymond
#5
Mapai website says to use their epoxy grout remover to remove dried haze.
Good luck with that, if it's everywhere then be prepared for hands & knees with a scrubber.
Its a brutal job.
 

Dafloorman

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Jul 30, 2008
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Gerald Simmons
#6
It may be epoxy grout. It says sanded grout with polymer. Not sure if that means epoxy or not.
This stuff is in every one of these porcelain wood look tile nooks, crannies and crevices.
Use some muriatic acid! 80% water 20% acid, with a stiff nylo grit blue brush, that will remove the haze, but not damage the floor.
 

PistolPete

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#7
Use some muriatic acid! 80% water 20% acid, with a stiff nylo grit blue brush, that will remove the haze, but not damage the floor.
He said he tried acid. I looked up the tech spec sheet for that grout and it says it's acid proof!
I've had some success using Hopes perfect glass cleaner for modified grout haze. It's alcohol based.
I've seen it so bad that the only practical solution was a tear out & replace, especially with wood plank tile
 

Dafloorman

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#8
He said he tried acid. I looked up the tech spec sheet for that grout and it says it's acid proof!
I've had some success using Hopes perfect glass cleaner for modified grout haze. It's alcohol based.
I've seen it so bad that the only practical solution was a tear out & replace, especially with wood plank tile
Yes but muriatic is stronger than the other acids that he’s tried.
 
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#9
Be extremely careful when using acid especially indoors. Always, always, always test first, preferably in a small spot that won't be visible if damage occurs, such as a closet or pantry. If acid is splashed onto appliances or other surfaces it can cause permanent damage, so always cover with plastic. One drop on a stainless steel appliance with the wrong customer and you may be buying them a new one. If you are using a very strong acid mix, even the fumes can cause corrosion (from experience) so don't use anything in a stronger concentration than the manufacturer recommends.

I understand that you want to help this customer out and that's commendable but don't make their problem your problem. As Pistol Pete said above, in some rare cases it just plain cannot be fixed. If that's the case, walk away it's just not worth it (also from experience).

BTW, polymer grout is not epoxy grout. Two different products.
 
Aug 22, 2008
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#10
Thank you, I did try a 3/1 mixture of muriatic acid when I did estimate. But, I already have breathing problems and did not want to make them worse. A company here in Houston recommended Twister which is hydrochloric acid. I saw on Mapei website that they have an Ultra Heavy duty cleaner to remove their products haze so I might recommend that to the customer.
 

rob allen

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#11
Dec 3, 2012
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#12
Is this the ready mix grout in a bucket? Dont know if acid will touch it. That stuff acts more like glue then typical grout.
 

MikeGaure

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#14
must me a diy project?

if not get that contractor back onsite.

hope your charging enough lol
 
Dec 3, 2012
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must me a diy project?

if not get that contractor back onsite.

hope your charging enough lol
So many tile guys i see leaving the haze for next day. I even heard one guy say "it will come off as they walk on it". If they thought this stuff would be the same? Man that was an expensive mistake. I agree bring installer back to clean up the mess.