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Custom Building Products RedGard 3-1/2 Gal. Waterproofing and Crack Prevention Membrane
0010186771748

Custom Building Products

RedGard 3-1/2 Gal. Waterproofing and Crack Prevention Membrane

  • Ready to use - Roll it on
  • Quick dry formula
  • First step to achieving a lifetime warranty
$139.00 /each

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Product Overview

RedGard 3.5 Gal. Waterproofing and Crack Prevention Membrane is a ready to use waterproofing and crack prevention membrane for tile and stone installations. Just roll it on and let it dry. The membrane dries quickly.

  • For tile and stone installations
  • Apply with a roller, trowel or sprayer (tools not included)
  • Use 1 coat for crack prevention
  • Use 2 coats for waterproofing
  • Dries quickly
  • Includes moisture control
  • Covers 385 sq. ft.

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Warranty / Certifications

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Customer Questions & Answers

59 Questions94 Answers

Customer Questions & Answers

RedGard 3-1/2 Gal. Waterproofing and Crack Prevention Membrane
RedGard 3-1/2 Gal. Waterproofing and Crack Prevention Membrane

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4 answers

Can I use this product on drywall ? Basically on walls ?

This question is from RedGard 3-1/2 Gal. Waterproofing and Crack Prevention Membrane
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January 18, 2016
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Answers (4)

Asked by
SoCarolina
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Home Improvement Profile: Professional
August 18, 2016
Answer: 
Not for a shower and if you need to waterproof any walls other than in the shower, you may have bigger issues.
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January 29, 2016
Answer: 
Yes, you can use this product on a wall.
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Asked by
lake charles la.
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January 21, 2016
Answer: 
If this is being used in a tub surround or shower area, I would recommend using cement backer board and then apply this product. That's what I did before installing wall tiles .
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January 19, 2016
Answer: 
RedGard Waterproofing and Crack Prevention Membrane may be applied to Gypsum surfaces with a minimum 2000 psi compressive strength in an interior dry area. Prime all surfaces to receive RedGard with properly applied manufacturer's sealer or with a primer coat of RedGard, consisting of 1 part RedGard, diluted with 4 parts clean, cool water. For further assistance please contact our installation division Read More
RedGard Waterproofing and Crack Prevention Membrane may be applied to Gypsum surfaces with a minimum 2000 psi compressive strength in an interior dry area. Prime all surfaces to receive RedGard with properly applied manufacturer's sealer or with a primer coat of RedGard, consisting of 1 part RedGard, diluted with 4 parts clean, cool water. For further assistance please contact our installation division at 800.272.8786 option 2 Read Less
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3 answers

Is this water cleanup

This question is from RedGard 3-1/2 Gal. Waterproofing and Crack Prevention Membrane
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November 8, 2015
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Asked by
SoCarolina
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Home Improvement Profile: Professional
August 18, 2016
Answer: 
Yes, but plan to throw away roller covers and brushes you use. That is why chip brushes are best to use with Redgard. Brushing also lays down a thicker coat than rolling.
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Asked by
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January 12, 2016
Answer: 
Yes, until it dries.
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November 9, 2015
Answer: 
While the product is still wet it can be cleaned with water. For further information please contact our technical service department at 800 272-8786 option 2.
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3 answers

Can redgard be used as an underlayment for peel and stick vinyl tile?

This question is from RedGard 3-1/2 Gal. Waterproofing and Crack Prevention Membrane
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July 21, 2015
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Asked by
SoCarolina
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August 18, 2016
Answer: 
No. Vinyl peel and stick tiles do not require underlayment like laminate flooring does.
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Home Improvement Profile: Professional
October 21, 2015
Answer: 
perhaps, call the tile manufacturer for specific guidelines or risk failure.
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July 22, 2015
Answer: 
We do not recommend that you bond peel & stick tile directly to RedGard. We would recommend that you skim coat the RedGard with a cement based product like SpeedFinish prior to bonding your peel & stick tile. For further information please contact our technical service department at 800 272-8786 option 2.
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2 answers

Can i use a single coat to seal osb subfloor so that i can mortar and screw backer board down after

This question is from RedGard 3-1/2 Gal. Waterproofing and Crack Prevention Membrane
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October 26, 2016
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October 27, 2016
Answer: 
Hello Dan,
Red Guard can be used on Exterior Plywood and OSB (interior, dry areas only). If you are installing backer board, you would apply a thin mortar, then the backer board. After that you could apply the Red Guard on the backer board.
To find specifications for any products on the Home Depot site. Left click on the photo of the product you are interested in at Home Depot.com. Then detailed Read More
Hello Dan,
Red Guard can be used on Exterior Plywood and OSB (interior, dry areas only). If you are installing backer board, you would apply a thin mortar, then the backer board. After that you could apply the Red Guard on the backer board.
To find specifications for any products on the Home Depot site. Left click on the photo of the product you are interested in at Home Depot.com. Then detailed installation instructions and product specifications can be found by clicking on the word “specification” which is below the product’s photo. You will find installations instructions and user guide to the right. Read this over carefully to see if this is right for you.
Thank you for your inquiry.
Charlotte of the Home Depot Community. Read Less
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October 27, 2016
Answer: 
Applying a coat of RedGard Waterproofing and Crack Prevention Membrane prior to installing cement backer board would not be beneficial, as the backer board fasteners would puncture the membrane. For further assistance please contact our installation division at 800.272.8786 option 2
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Customer Reviews

RedGard 3-1/2 Gal. Waterproofing and Crack Prevention Membrane is rated 4.7 out of 5 by 44.
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. 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: 2016-11-22
Rated 5 out of 5 by from Works as advertised I used this product to waterproof a concrete floor prior to gluing 3/4 oak flooring down. This product was easy to apply with a roller, dried quickly, and filled in some of the smaller cracks in the concrete. Adhesive seemed to apply well on top of it. Good product.
Date published: 2016-07-23
Rated 4 out of 5 by from I used this to coat a basement floor before installing a laminate floor over it. The product spr... I used this to coat a basement floor before installing a laminate floor over it. The product spreads easily and dries quickly! It is a little pricey, but it forms a nice sealed membrane when complete. I would recommend buying more than you think you will need.
Date published: 2016-11-08
Rated 5 out of 5 by from waterproofing and crack isolation membrane The redgaurd did a great job as a floor underlayment. I needed to seal an older concrete floor. There were numerous cracks in the existing concrete allowing water to seep through.
Date published: 2016-12-27
Rated 5 out of 5 by from Water Proof This product was easy to apply and dries fast. Made it easy to apply two coats om n the same day.
Date published: 2016-10-13
Rated 5 out of 5 by from it worked exactly as said like the chance in color to let you know it is dry it worked exactly as said like the chance in color to let you know it is dry
Date published: 2016-12-18
Rated 5 out of 5 by from REDGARD Excellent product that gives You peace of mind. Product has multiple uses .
Date published: 2016-09-06
Rated 5 out of 5 by from Great stuff Easy to use, dries fast. Used as anti fracture prep for tile floor
Date published: 2016-09-21
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