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Unread 05-16-2014, 02:35 PM   #1
Laura who is sick of reno
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Sealing slate countertops

Hi everyone--
This forum has always been very helpful so I thought I'd see if anyone has any advice for my latest conundrum. We just installed slate countertops in our kitchen, and I am trying to figure out what to seal them with. I guess the slate is not very porous-- if you put a drop of water on it, it takes a long time to sink in.

The slate was repurposed from 2 pool tables, and before it was polished, the colors of each piece looked similar, but now that it is polished, one of the pieces is less black than the others. But if you wet it or put oil on a sample, it looks darker and more similar to the other pieces. So I was hoping for a finish that would give an "oiled" look to even out the color a bit. I'm not necessarily looking for a shiny finish, but I could deal with it if necessary.

I had been planning to use DuPont Impregnator Pro, because I've read that it is good for non-porous stone, but it also claims to have a "natural" looking finish, which I assume means that it won't change the appearance (color) of the stone.

So I'd love any suggestions of a product (or 2) to use on a non-porous stone to provide good protection and give it an darkened / oiled look would be much appreciated! Thanks ~Laura
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Unread 05-16-2014, 09:53 PM   #2
Tool Guy - Kg
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You're right, that sealer won't change the look of the stone at all. For several minutes as the sealer is applied and the stone is wet, it temporarily changes the color level...but then returns to exactly what the stone looked like before you started.

Sounds like you're looking for an enhancing sealer. They will generally make the color look as though it's wet, yet won't generally impart a higher sheen if you only apply one coat. Enrich 'n Seal from AquaMix would be probably be my first choice because it works well and isn't hard to obtain. 511 Seal & Enhance is another. There are other possibilities. But I'd encourage you to stick with a well known brand. The good sealers are quite a bit more $ than most of the so-so products. But whatever you choose, it's very important to test in a small inconspicuous spot before committing to an entire countertop.

And do make sure you don't choose a topical sealer. A topical sealer, unlike what's previously been mentioned, sits on top of the stone like a film of varnish. They would generally impart a lot of sheen and require oodles of maintenance to keep them nice on a heavily used surface like a kitchen countertop.

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Unread 05-17-2014, 09:08 AM   #3
Laura who is sick of reno
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Hi Tool Guy--

Thank you so much for your very helpful reply. I may be over-worrying the porosity of the stone... This article suggests that the chosen sealer has to match the porosity of the stone (so that the product absorbs properly).


ANYWAY... thanks for your response and we'll probably use the Aquamix stuff. Take Care! ~Laura
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