7. For the DIYer, you can also try a paste of flour and hydrogen peroxide. Spread it over the stain, cover with plastic wrap, and allow to sit overnight. Remove the paste with a damp cloth or with a soft scraper (if needed). This treatment may require more than one application, and results will vary depending on the nature of the stain and the type of sealant you used on your slate.8. When water does not bead on the tile, it is time to reapply sealant. Slate will require resealing throughout the years, a task offset by the fact that clean up during the intervening years is quite easy. Before sealing, sand any scratches with a fine grain sandpaper.Slate stone is resistant to water, doesn’t react to chemicals, is fireproof, is less porous than many other natural stones, and doesn’t scratch easily. All of that said, slate, like all natural stone, must still be cared for to keep it as clean and as beautiful as the day it was installed. Follow these tips to keep your flooring looking their best!
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