Use the brush with the acid, about 10% and some oxalic, a touch of neutral cleaner for a surfactant, that’s what I do and it works great.

 

From: Jason Francis [mailto:jfrancis@marbleglow.com]
Sent: Monday, 17 March 2014 10:20 AM
To: Stone and Tile PROS Technical Support
Subject: RE: [sccpartners] Efflorescence on Slate

 

Thanks mike. I had  previously tried a nylo grit with no results. Straight hydrochloric acid seemed to loosen it some. Maybe I could try the strata after allowing hitting it with acid.

 

Jason

On Sunday, March 16, 2014, Mike Marsoun <nulifesc@bigpond.com> wrote:

Use a strata grit brush (80 grit) and if you need a smoother finish follow with a nylo grit (120). 

Sent from my iPhone


On 17 Mar 2014, at 3:36 am, Jason Francis <jfrancis@marbleglow.com> wrote:

Any quick input on this one would be greatly appreciated....

 

 

I have an old lobby slate floor, 1000SF, and successfully removed ugly epoxy coating. When dry, on only certain tiles(20%), there is heavy efflorescence that I have not come across. It is mineral buildup that is very hard.(it barely scratches with a screwdriver) Acid cleaners did not make much of a difference. Grinding the floor would be too much work because of its rough texture, and it would end up flat.

 

How can I get rid of the buildup? I am thinking of trying a stronger acid, like muratic acid. The only solution I can come up with is possibly antique brushes on a variable grinder? I have no idea how that would work. Shot Blasting with baking soda, but that would be a pain...

 

Thanks!

 

Jason

 

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Marble Glow
Jason Francis
Sales / Lead Stone Pro
www.marbleglow.com
333 Norton Road
Red Hook, NY 12571
718-514-7343 NYC 

845-208-8289 Upstate 

 

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 Image removed by sender.


Marble Glow
Jason Francis
Sales / Lead Stone Pro
www.marbleglow.com
333 Norton Road
Red Hook, NY 12571
718-514-7343 NYC 

845-208-8289 Upstate 

 

Image removed by sender.

 

 

 

 

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