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Unread 07-27-2020, 12:01 PM   #1
Dun Wright
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Join Date: Oct 2019
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White Spectralock Epoxy grout stains- What chemicals can I use?

Long story short, the last step of our bathroom remodel turned into a mini nightmare.

I caulked a black granite countertop to a white tile wall. Long story short, I didn't like the first caulk job so I washed it off with copious amounts of water and started again. What I didn't notice is that although my caulk line at the countertop level was cleaned well, I let the black caulking-laced water run down the backside of the wall behind the cabinet (no big deal) but it then pooled on the white floor and white epoxy grout.

So now I have a beautiful white floor and white grout, with dark grey stains in the grout, everywhere the water pooled. The ceramic tile was untouched but the white spectralock grout looks atrocious.

What chemicals can I use on Spectralock Epoxy grout without discoloring it more?

Do harsh chemicals effect epoxy grout? how about goof off? Latex caulk remover? Laquer thinner? Denatured alcohol?

The black caulking was DYNAFLEX ULTRA EXTERIOR SEALANT, paintable if that matters at all. NOT silicone but it does appear to be a hybrid of some kind.

Thanks in advance.

edit- Does anyone seal epoxy grout? I know chemically it is pointless, but more wondering if there is something that makes it less resistant to holding dirt/stains. A "slick coat" so to speak...

Last edited by Dun Wright; 07-27-2020 at 02:57 PM.
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Unread 07-27-2020, 09:38 PM   #2
Tool Guy - Kg
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Hi, Bob.

Nobody I know of seals epoxy grout. Penetrating sealers don’t leave a film (or slick coat).

Epoxy is resistant to many chemicals, but that doesn’t give you carte blanche to try every cleaner willy-nilly.

First thing to do is place a quick call to the manufacturer of the caulk to see what solution will dissolve it. Then do little test to see how it fares.

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Unread 07-31-2020, 12:08 PM   #3
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Hi Bob,
Here is a link to suggested cleaning (refer to the restorative deep cleaning section). We'd suggest doing a small test area first to determine compatibility.
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