Stain Removal on Natural Stone
- Thread starter SuperDave212
- Start date
Mikey P
Administrator
yikes.
Did you see any improvement with the peroxide Dave?
My guess is that you have mold on the back side of those tiles leaching through.
JackHAMMER time.
Did you see any improvement with the peroxide Dave?
My guess is that you have mold on the back side of those tiles leaching through.
JackHAMMER time.
clean image
Member
It's a mineral formation. tell tale in the formations on the crack. Path of least resistance for water thats getting under and evaporating out carring everything with it, The black could be coming from slate as well, as it is up steam from the drain.
If You can remove it, probably matter of time before it returns.
Get most of it on surface mechanically, razors or carbide tips or diamonds
Most will be on surface, however being unfilled trav, that black may be inside trav.
Last resort before replacement -try media blast or phosphric- then fill stone
Majority of roof tops hard surface, balconies, I see are not built correct and alway a problem
If You can remove it, probably matter of time before it returns.
Get most of it on surface mechanically, razors or carbide tips or diamonds
Most will be on surface, however being unfilled trav, that black may be inside trav.
Last resort before replacement -try media blast or phosphric- then fill stone
Majority of roof tops hard surface, balconies, I see are not built correct and alway a problem
SuperDave212
Member
40 clear peroxide didn't do a thing....was planning on filling the holes thru out the roof and putting an outdoor sealer when I removed the stain....since I'm a marble guy I can diamond grind it but thought it went to deep, media blast is a sand blasting??
SuperDave212
Member
also tried kleeztone #1 didn't do a thing,
Cameron DeMille
Member
none of what you used will help with mineral deposits. You need acid and mechanical abrasion. Klenztone is great for dirt. Peroxide is great for tannins.
I don't think it's coming from the bottom, usually when it's black, it's standing water that gets hit with the sun and dries off the surface. Either way, acid and an abrasive brush, or grind it. I would rather grind it because it won't collect in as many areas afterwards, but this will be a repetitive thing.
I don't think it's coming from the bottom, usually when it's black, it's standing water that gets hit with the sun and dries off the surface. Either way, acid and an abrasive brush, or grind it. I would rather grind it because it won't collect in as many areas afterwards, but this will be a repetitive thing.
SuperDave212
Member
thank you Cameron....I think I met you in Nashville at a granite convention...
Cameron DeMille
Member
If it was for the SFA show I was there
clean image
Member
You have a pitched floor, remember that if you grind
Mikey P
Administrator
clean image
Member
So you don't make a bird bath
SuperDave212
Member
I would have to spot refinish by hand, I'm at the building again this week, will let you know..
SuperDave212
Member
Hit black spot with a metal diamond by hand, came right off...now I can bid the job...wish me luck
Mikey P
Administrator
good luck, take pics!!!
