Model # SBG12

Internet #202525431

Store SKU #570923

Store SO SKU #1000726568

Custom Building Products StainBlocker 12 oz. Additive for Grout

Custom Building Products

StainBlocker 12 oz. Additive for Grout

$997 /each
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Frequently Bought Together

Product Overview

StainBlocker for Grout is a sealing and performance enhancing additive to be used when mixing grout and water. Unlike traditional sealers which are applied to grout after it has dried for 2-3 days, StainBlocker for Grout is added directly to the grout mix during installation, to immediately repel dirt and make clean-up easier after the grout is dry. StainBlocker for Grout will not affect grout color.

  • Use with 7 lb. and 10 lb. polyblend grout
  • Add when mixing grout and water
  • Immediately resists dirt, oil, and stains
  • Low odor, low VOC, pH neutral

Info & Guides

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Container size (qt.)
Maximum coverage area (sq. ft.)
Product Width (in.)


Base Material
Color Family
Commercial / Residential
Commercial / Residential
Dry time (hours)
Flooring Material Features
Stain resistant
Flooring Product Type
Flooring Admixture
Flooring Use Type
Flooring material for use on
Product Weight (lb.)
Sealer Type

Warranty / Certifications

Manufacturer Warranty
1 Year Product

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Customer Questions & Answers

Can you use this sealer with hydraulic Cement grout

small job 24" x 24" replacing 6" tiles
Asked by: Anonymous
Yes you can. But if you have any questions about it call Custom Building Products at 1=800-8786.
Answered by: Larry
Date published: 2015-10-24


If I mix this with the grout do I still have to seal the grout?
Asked by: Bob
StainBlocker Grout Additive may be mixed with grout to provide stain protection. Sealing grout is recommended, but is not required. For further assistance please contact our installation division at 800.272.8786 option 2
Answered by: CustomBuildingProducts
Date published: 2016-02-13

What r mixing directions?

Asked by: Jd
12 oz. of StainBlocker Grout Additive and 6 oz. water may be used with the 7 lb Polyblend Sanded Grout. 12 oz. of StainBlocker Grout Additive and 36 oz. water may be used with the 10 lb Polyblend Non-Sanded Grout. For further assistance please contact our Care and Maintenance division at 800.272.8786 option 3
Answered by: CustomBuildingProducts
Date published: 2016-02-03
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Customer Reviews

StainBlocker 12 oz. Additive for Grout is rated 3.1 out of 5 by 16.
Rated 1 out of 5 by from lightens grout We purchased this and use it throughout our house. I'm not sure about the durability but it changed the color of our grout. It went from a very dark grey to a light grey. disappointed but I can't change it now. It's not awful but its not what I chose
Date published: 2017-04-29
Rated 5 out of 5 by from Awesome I used this for the first time about a year ago. I used it on a kitchen back splash. The joints still look brand new, and that's in a kitchen, behind a range, and behind the sink. I wouldn't ever use the old joint additive ever again. It doesn't clean up like this product. Plus you just add it in your mix and you're done, you don't have to go back after it dries like the old.
Date published: 2015-09-01
Rated 1 out of 5 by from Very BAD product It is not just waste your money! You want to kill yourself why so so stupid to purchase this product. 1. It doesn't work, you can still see the water penetrate the grout 2. Once that left on the tile, it is extremely difficult to clean, it could take you a month to clean, because when it wet you are unable to see it until it dry.
Date published: 2016-09-26
Rated 5 out of 5 by from Great product This worked great with our grout for the shower. Sealed and done. Waterproof
Date published: 2014-10-22
Rated 5 out of 5 by from Stainblocker 12 oz Additive For Grout It's very easy to use. Just add it when mixing. It helps to keep the color true and to keep stains from soaking into the grout.
Date published: 2015-10-24
Rated 1 out of 5 by from Doesn't Work at all First time the grout had something spilled on it, it stained. Wish i would have gone with a regular sealer. All my hard work tiling the floor is ruined. :(
Date published: 2012-07-10
Rated 2 out of 5 by from Very difficult to work with I added this to PolyBlend un-sanded grout to grout some mosaic tile. I usually use the Grout Boost additive, but it was not in stock. The StainBlocker additive was mixed with water precisely per the directions for un-sanded grout and was mixed to the usual consistency with the proper wait time. It floated onto a small area ok, but quickly began thickening and was extremely difficult to sponge off any excess grout, even with the scrubber side of the sponge I was using. This increased the application time, the amount of grout needed (due to waste), and my frustration level significantly. My advice is to stay away from this product. If you decide to use it anyway based on other reviews here, I'd love to be there to tell you "I told you so"!
Date published: 2015-09-10
Rated 5 out of 5 by from great product from homedepot great stuff to mix in with grout , make keeping stains off a whole lot easier
Date published: 2015-03-11
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