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BTG PRODUCTS

Mold and Mildew Defense Grout Additive | Grout-Guard Treats 10lbs Grout - Pack of 1

  • Based on 16 reviews
Condition: New
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Availability: 13 left in stock
Fulfilled by Amazon
Arrives Friday, Oct 23
Order within 19 hours and 55 minutes
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Features

  • MOLD & MILDEW DEFENSE: Protect your grout by incorporating Grout-Guard during mixing
  • ADVANCED FORMULA: Non-toxic solution that keeps your tile looking brand new
  • USE ANYWHERE: Ideal for the bathroom, kitchen, and any other room that has floor or ceiling tiles
  • EASE OF USE: Knead the package for a few seconds and add to wet grout while mixing
  • MADE IN THE USA: All manufacturing and designs are made with American jobs

Description

Grout-Guard comes with notches to allow for easy tearing. All pieces of Grout-Guard are sourced in the US and all manufacturing is done in Texas. The ingredients used to make Grout-Guard are extremely effective at defending the surface from mold and mildew. This product is safe and effective. The same ingredients can be found in baby paste and sunscreen. Even though Grout-Guard is a white gel, the clear zinc oxide allows for the pigment of the grout to be absorbed rather than lightening your desired color. Protect your home from mold and mildew by incorporating Grout-Guard during the mixing process. Get ahead of black grout lines by adding Grout-Guard early in your tiling process.

Material: Polymer-based


Brand: BTG PRODUCTS


Style: Grout Additive


Water Resistance Level: Water Resistant


Item Form: Liquid


Brand Name: BTG PRODUCTS


Number of Packs: 1


Unit Count: 160 Ounce


Global Trade Identification Number: 22


Number of Items: 1


Manufacturer: BTG Products


Model: GG10


Part Number: GG10


Water Resistance Level: Water Resistant


Item Form: Liquid


Compatible Material: [Tile]


Style Name: Grout Additive


Surface Recommendation: Ceiling,Floor,Tile


Material Type: Polymer-based


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Friday, Oct 23

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

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Similar Products

Top Amazon Reviews

    • Keeping my bathroom grout white!
Style: Grout Additive
Worked wonderfully! I'm redoing my kids' bathroom, and so happy to have some protection against mold and mildew in my bathroom grout!
Reviewed in the United States on March 27, 2026 by kristy kelly
    • Quality product
Style: Grout Additive
GREAT PRODUCT! Moved into our new house that the builders used a cheap grout in. We had a serious mold issue in our bathroom after only a few months of living there, swapped it for Mold Defense and cleared out all the mold! Highly, highly recommended.
Reviewed in the United States on May 2, 2023 by Isaac Munoz
    • Seems good for white grout.
Style: Grout Additive
My wife bought this without knowledge. I needed a mold block to add to a custom dark color grout. This one's main ingredient is bright white zinc oxide. Mixed with white grout, it is probably perfect. With dark steel blue, it just didn't work. Saved it for a white grout project that is next.
Reviewed in the United States on July 17, 2023 by TXDiver
    • Easy to add forextra protection
Style: Grout Additive
I decided to do some remodeling to our bathroom. We have way to much moisture in there and our previous fan (from the 50s) was super loud and didn't seem to actually pull out moisture very well. As a result we get a lot of mold, including on the ceiling. I can remove it fairly well from the tiles on the walls, but I've removed it using commercial fungicides many times from my ceiling but it always comes back. So, I bought a new ultra quiet fan to install and decided just in case that doesn't help enough that I would actually just tile my ceiling. However, I know that while the tiles will be relatively easy to clean, grout can be a pain to remove mold from. Not wanting to have to spend time scrubbing grout lines on my ceiling I decided two things, 1. I'll use the thinnest grout line I can, and 2. I'll use this grout additive to reduce the risk of mold and mildew. I can't vouch for it's effectiveness yet, as I only just used it and the mold will take a while to notice if it's still a problem. What I can say is that it was easy to use and mixes into the grout perfectly. I'm not sure it would be something you could easily add to a pre-mixed grout but if you're mixing it yourself from the powder, its really just the added step of pouring this in with your grout. I really hope to see a marked improvement with no mold growth in the bathroom after all this but if I'm back to scrubbing mold out off my ceiling and it's allover the grout, I'll be sure to update this review. ... show more
Reviewed in the United States on April 16, 2023 by Cassandra Strand
    • Mixes well ~
Style: Grout Additive
Review Image by Cagalli
It's a very small packet and blends in seamlessly. Regarding its mold and mildew defense, I haven't observed any significant difference. Nonetheless, some protection is better than none. My grout is white, and I didn't find any issues with the grout when I used this additive. So far, there is no mold on the grout in my bathroom. ... show more
Reviewed in the United States on September 8, 2023 by Cagalli
    • Used Indoors and Trying Outdoors for North Facing Windows,
Style: Grout Additive
I put this in the grout we used when recently re-tiling our shower stall and it seems to be holding up well. But since it can be used in wet environments, and is largely sodium chloride and zinc oxide which are effectively natural insecticides and pesticides also, I decided to combine some with my window seal and put it around the exterior north-facing and lake-facing windows of our house which are in the back of our home thankfully, where they tend to get horrible looking mold and other growth around their edges. I'm hoping this will help prevent them from darkening and needing frequent cleaning and re-sealing, but also they might repel bees from nesting, and the invasive beetles, flies, mosquitos, etc. which sometimes hanging around too close to the house where we like to BBQ on the patio. ... show more
Reviewed in the United States on May 28, 2023 by MJ
    • Effective, but Time Limited
Style: Grout Additive
Review Image by CJBS
Review Image by CJBS
This is a zinc-oxide liquid that contains sodium chloride (salt), which deters mold from growing. It mixes with grout (I've mixed with caulks before too). This is effective at repelling mold, and may extend the mold resistance for a few years, but it won't last forever. Mold will eventually grow. Having said that, there's nothing to lose by adding this - it's relatively cheap - to eek a few extra years out of grout/caulk. ... show more
Reviewed in the United States on May 20, 2023 by CJBS
    • Works great
Style: Grout Additive
I must express my utmost satisfaction with this outstanding product! After moving into our new house, we discovered that the builders had used subpar and inexpensive grout in the bathroom. To our dismay, within just a few months of living there, we were confronted with a severe mold problem. Determined to tackle the issue head-on, we decided to switch to the remarkable Mold Defense product. The results were nothing short of miraculous! With the help of Mold Defense, we successfully eradicated all traces of mold from our bathroom. I cannot stress enough how highly I recommend this exceptional product. If you're faced with a similar mold predicament, don't hesitate to give Mold Defense a try – it truly delivers exceptional results. ... show more
Reviewed in the United States on May 22, 2023 by Noor

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