Sealing Grout?

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Forum topic by jasoncarpentry posted 05-31-2013 05:58 PM 1034 views 0 times favorited 4 replies Add to Favorites Watch
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142 posts in 2618 days

05-31-2013 05:58 PM

Topic tags/keywords: grout sealer colorant ceramic tile

This is probably the wrong forum for my questions, but I couldn’t find a forum for non-wood DIY questions.

I have a back porch with ceramic tiles & grout. The porch is screened in, so the tile gets rained on. I also have a fairly large shower w/ a tile floor. I’ve been told that the grout needs to be sealed periodically (every 2-5 years, depending on who’s giving the advice). We just mopped the porch w/ a standard soap product, and now my wife says that some of the grout is discolored. I can’t tell, but I’m slightly color blind.

So now I have to clean (or re-color) and seal all of the grout. For the cleaning step, I got “Tile Guard” cleaner from Ace Hardware. I tried it on some of the darker-looking grout, w/ no color change that I can tell. So, that’s Strike One.

As far as the sealant, I just looked at this product from Home Depot:

Both the salesman and the on-line product reviews are unclear as to whether this is a colorant AND a waterproof sealer, or just a colorant. I understand that the manufacturer (Polyblend) can make grout in a variety of colors, and a combination colorant/sealer would be ideal for my needs.

Any help would be appreciated.

-- Jim in Tennessee

4 replies so far

View bold1's profile


293 posts in 1811 days

#1 posted 05-31-2013 10:03 PM

Years ago we used Thomsons water seal for grout or any porous masonry. Now they usually recommend an acrylic sealer. I’ve used a sealer sold by Color Tile, but since we no longer have any of their stores, I was advised by an installer i know to use any good acrylic floor sealer. My wife has done our kitchen last year and so far I can tell no difference between the Color Tile grout sealer and the acrylic sealer/wax. Cleaning can be spotty depending on what is in the grout. If too spotty regrouting is your last choice. I use sodium percarbonate, also known as oxygen bleach, to clean. Simply mix in clean water and place on the grout and let sit a minute or so. Then scrub with a stiff brush or broom(I don’t like to get on my knees anymore). It’s the best I know of that shouldn’t cause any problems. All sealers should darken the color slightly, but if the grout’s clean it should be even.

View ShaneA's profile


6909 posts in 2562 days

#2 posted 05-31-2013 10:14 PM

Looks like it says colorant and sealer to me. Why do you need the colorant? If the grout is wet, the color will be different than when totally dry. It can take quite a while for grout to really dry. Sealing should be done as needed, based on absorption rate. Kind of like waxing a car. If the water beads, you are good. If it soaks in and the grout changes color, it needs sealing. Dupont makes a good sealer.

View jasoncarpentry's profile


142 posts in 2618 days

#3 posted 06-01-2013 01:27 AM


I’d like to find a combination colorant/sealer so that I can get a uniform color AND seal the grout all at the same time.

-- Jim in Tennessee

View ChuckC's profile


828 posts in 2898 days

#4 posted 06-01-2013 04:13 AM

I’ve had very good luck with OXI cleaner on grout. It comes as a powder and you mix it with water. Make the solution strong and use a stiff synthetic scrub brush.

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