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Custom Building Products RedGard 1 Gal. Waterproofing and Crack Prevention Membrane
0010186764375

Custom Building Products

RedGard 1 Gal. Waterproofing and Crack Prevention Membrane

  • Ready to use - Roll it on
  • Quick dry formula
  • First step to achieving a lifetime warranty
$49.97 /each

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Product Overview

RedGard Waterproofing and Crack Prevention Membrane prevents cracks in tile and stone floors due to surface movement. The membrane also produces a moisture barrier. Suitable for use in residential and commercial tile and stone installations.

  • Designed for interior and exterior use
  • Easy to use and can be applied by roller, trowel or airless sprayer
  • Apply 1 coat to inhibit tile and stone cracking due to minor surface movement
  • Apply 2 coats to waterproof floors and countertops
  • Rated for extra heavy-duty service

Info & Guides

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Warranty / Certifications

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Customer Questions & Answers

Can I use tile mastic to install tiles over redguard in a shower

Asked by: Chuck
You can but its not recommended. Tile mastic has a tendency to break down over time in areas of high moisture. Thin-set is the standard for high moisture areas.
Answered by: Nick
Date published: 2016-07-21

Can it be used on fiberglass? I am trying to revitalize, smooth and seal the storage cavities in my rv floor.

Asked by: Goffredo
RedGard will not work on fiberglass to revitalize storage cavities of an rv floor, you may need to use some epoxy based material.
Answered by: CustomBuildingProducts
Date published: 2015-11-01

Cement board gaps and seams

For cement board gaps 1/8" or less your instructional video states you can join the two surfaces with redgard. States to spread 6" of redgard on both sides of the gap then apply 6" inch mesh tape to seam and then apply redgard to join seam. Apply second coat to waterproof. In other questions posted here I see it recommended by some to join the seams with thinset first then redgard. I want to do this right and I dont want to have to redo it, so which is it? Redgard alone is okay or thinset first for seams then redgard?
Asked by: Anthony
We would recommend to tape and fill seams between cement board with a polymer-modified mortar prior to applying the RedGard Waterproofing and Crack Prevention Membrane. For further assistance please contact our installation division at 800.272.8786 option 2
Answered by: CustomBuildingProducts
Date published: 2016-11-28

Will RedGard stick to PVA drywall primer? I have used a scratchcoat of thinset over old concrete ...

Will RedGard stick to PVA drywall primer? I have used a scratchcoat of thinset over old concrete board and rough old tile glue, then primed with Kilz PVA drywall primer. Is my RedGard going to stick on top of all this?
Asked by: Superdry
RedGard Waterproofing and Crack Prevention Membrane is not recommended to be applied over PVA primer. For further assistance please contact our installation division at 800.272.8786 option 2
Answered by: CustomBuildingProducts
Date published: 2016-10-26

Can I tile with thin set directly on redgard with thin set I did and now some of the tile are coming loose

Asked by: JD
From what I'm understanding from your sentence is if you can install tiles on top of RedGard. Remove any loose tiles first, and the reapply the thin-set mortar. I'm not sure why the tiles are loose, but be aware of proper drying times, and apply it correctly using the right mortar and notched trowel. Joseph
Answered by: JosephHDATL
Date published: 2016-03-11

Hello ALL: I'm using the Densshield Backer Boards for our bathroom Shower Tiling job. The Denshie...

Hello ALL: I'm using the Densshield Backer Boards for our bathroom Shower Tiling job. The Denshield "Backside" is already Factory Sealed with a "Yellow" color, but the Sides are "White" and look like the Raw Board Material. The Front is the Normal Gray Paper look..... Therefore, can I use this RED GUARD on the entire board (Sides & Backside) before even installing the boards to the Showers Walls ? Thanks
Asked by: DIYr
Please confirm with DensShield that this method of installation complies with their systems warranty. For further assistance please contact our installation division at 800.272.8786 option 2
Answered by: CustomBuildingProducts
Date published: 2017-01-24

Is this appropriate for shower walls?

I'm thinking of applying this over hardi board before tiling my shower wall, but I'm concerned that the tile may not adhere well to the wall with this in between, especially given that it's supposed to be a crack prevention membrane (which seem to suggest that it serves as a decoupling membrane in addition to being waterproofing).
Asked by: John
yes as I am using it on my basement shower stall and it is highly recommended for showers. I applied it, waited a few days, then applied my tiles and haven't had any problems with tiles coming off.
Answered by: Rich
Date published: 2016-08-17

SHOULDN'T I TAPE AND THINSET CEMENT BOARDS JOINTS BEFORE APPLICATION OF REDGARD

THE INSTRUCTIONS JUST SAYS TO TAPE JOINTS AND APPLY REDGARD, LOOKS LIKE YOU SHOULD TAPE & THINSET JOINTS FIRST?
Asked by: BUTCH
seal your joints with tape, then seal the tape with thin-set, then apply the Redguard after the thin-set has dried and has been lightly sanded. The Red Guard will seal all the joints for you.
Answered by: Rich
Date published: 2016-07-31
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Customer Reviews

RedGard 1 Gal. Waterproofing and Crack Prevention Membrane is rated 4.6 out of 5 by 145.
Rated 5 out of 5 by from Redgard was very easy to apply. I actually used a brush, first to do all the corners and seams, ... Redgard was very easy to apply. I actually used a brush, first to do all the corners and seams, then to coat the rest. I put 2 coats on all the seams. Clean up was easy with water. I used it previously on my other shower floor. This time I used it on my entire master shower, walls and floor, seat, and niche. I even used it to re-coat a couple of my tools that had lost their rubber grips; worked like a charm! When the connection on my cord for charging my cell phone started to separate, I even used a Q-tip to put the redgard around the area. What great stuff!!
Date published: 2016-11-04
Rated 5 out of 5 by from I recently used this product on a bathroom shower tile project. 1 gallon was sufficient for the 3... I recently used this product on a bathroom shower tile project. 1 gallon was sufficient for the 3x5 shower. The application was painless and it creates an amazing, almost rubber like, membrane. I built a small box using leftover 2x4's and painted the interior to test it and it held the water with no leakage. My project isn't complete yet so I can't speak to the durability but it definitely gives me piece of mind.
Date published: 2016-12-15
Rated 5 out of 5 by from This stuff is amazing. I first saw it at a tile store where they had coated the inside of a small... This stuff is amazing. I first saw it at a tile store where they had coated the inside of a small cardboard box with RedGard and filled it with water. I was so fascinated by this that I had to go look at it each time I went in the store. It was there, holding water for months!
Date published: 2016-12-09
Rated 3 out of 5 by from I purchased this on the advice of a HD professional to be applied over new Hardi Board for a tub ... I purchased this on the advice of a HD professional to be applied over new Hardi Board for a tub surround....no shower. I planned to tile the walls of this surround. It was fairly expensive, in my estimation. Upon getting home and reading the instructions, I found that you cannot use premixed tile adhesive with this product. As I had already purchased the tile adhesive, and did not want to purchase and mix another product, I returned the RedGard. As this is a tub-only installation, I deemed the use of this product to be unnecessary , but I believe it would be very good for use under the tile in a shower.
Date published: 2017-01-17
Rated 1 out of 5 by from I bought this one and trusted it because of so many positive reviews here. I followed the instruc... I bought this one and trusted it because of so many positive reviews here. I followed the instruction and used it on Hardie cement board. After a few days, I checked on it and I was so surprised to find out that I could peel off some areas just like peeling off an old paint. It didn't I contacted their customer service and they recommended to apply a primer coat prior to two full coats. Their recommendation wasn't even on the manual and It was clearly not a user mistake. I had to spend a few hours to peel it off from the shower wall on a small bathroom size. No refund/replacement. I bought Ardex 8+9 waterproofing compound and hoped that it would work based on some suggestions online for Hardie cement board. WOW! It was a huge different compared to RedGard. It sticked really well on Hardie cement board. It even sticked on my t-shirts, pants, and other materials. The smell was not as strong as RedGard. The dark grey color was nice too compared to RedGard bright red color. The most important different was the texture. The dried membrane had a rough texture good for bonding with cement. RedGard had a smoother soft plastic-like texture. I would highly recommended Ardex 8+9 on Hardie cement board. Their customer service was fast and helpful when I called them for some questions.
Date published: 2016-11-21
Rated 5 out of 5 by from This stuff is awesome. My husband and I used it to seal a crack in our floor prior to installing... This stuff is awesome. My husband and I used it to seal a crack in our floor prior to installing tile in our kitchen. The only drawback was removing the mortar when we replaced the floor a few years later. The areas where the Redgard was installed were very difficult to remove. I guess this is a testament to how well it works though, so we will continue to use it on our residential remodel projects.
Date published: 2016-12-13
Rated 5 out of 5 by from Good stuff I used this to waterproof a niche in a shower wall. It was applied in the area over concrete board. After finding that I had high spots on the mortaring and had to grind it down, I found a reassuring membrane in the part that I grinded away. I have pending peace of mind that this is water-tight.
Date published: 2016-10-04
Rated 5 out of 5 by from I applied his over older concrete in my basement. Easy to apply and am ready for the tile now! I applied his over older concrete in my basement. Easy to apply and am ready for the tile now!
Date published: 2016-11-08
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