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Marty
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Category: Home Improvement
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Experience:  30 years of home remodeling
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remove water stains from slate hearth

Customer Question

black slate hearth- water from plant has dripped onto the slate. It is a greyis white color. have tried scrubbing but does not remove entirely.
Submitted: 9 years ago.
Category: Home Improvement
Expert:  Tammy F. replied 9 years ago.
  First thoroughly spray a 50/50 solution of hydrogen peroxide and water directly on the spot. Let that set 15 minutes and repeat. Do not use this mixture on colored grout. Peroxide is bleach, safe but nonetheless bleach. It removes the color from colored grout.



If the stain refuses to budge, soak a heavy-duty paper towel with straight peroxide laying the towel on top of the stain. Cover the towel with plastic wrap to prevent the peroxide from drying out quickly. The towel holds the peroxide on the surface giving it time to dissolve the stain. If that doesn’t work, mix a paste of straight peroxide and baking soda. Allow the bubbling to subside. Apply to the stain and let it set. Re-spray with peroxide as it dries out.



Shaving cream sprayed on stains also does a good job removing them. If your grout is colored test an inconspicuous spot first. Tile stores now carry a cleaner stick that resembles chalk. It is safe to use on colored grout and works wonders. After you remove the stains from the grout, seal them.


source


Let me know if you have more questions.

Expert:  Marty replied 9 years ago.
 
Try regular vinegar. It's slight acidity is usually enough to dissolve
the water stain if it is a lime deposit. Next step would be "Lime-Away"
or "C-L-R" , but use sparingly.

If neither of these works, then the sealer is discolored. Try an
automobile finishing rub,"fine" in texture. Apply with a terry cloth
towel and rub. As it removes the finish, it will also seal the slate so
that no other sealer would be required.



 




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