Free Shipping and BOPIS

Custom Building Products

Model # LQWAF3

Internet # 100678063

Store SKU # 934492

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

This item has been discontinued.
The Home Depot no longer carries this specific product.

$139.00 /each


Model # LQWAF3

Internet # 100678063

Store SKU # 934492

Store SO SKU # 1000248522

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.

Info & Guides

You will need Adobe® Acrobat® Reader to view PDF documents. Download a free copy from the Adobe Web site.


Product Width (in.) 
Product thickness (mil) 
Recommended overlap (in.) 
Roll length (ft.) 
Roll width (in.) 
Commercial / Residential 
Commercial / Residential 
Flooring Product Type 
Flooring type(s) used with 
Tile & Stone 
Moisture control included 
Package coverage (sq. ft.) 
Sound absorbing 
Subflooring type 
Warranty / Certifications
Manufacturer Warranty 
1 year product 


Rated 4.8 out of 5 by 25 reviewers.
Rated 5.0 out of 5.0 by Easy to Use! After lots of research we decided to use Redgard over Wonderboard cement board for the very large shower we built. It was easy to use, just like painting. I wore a respirator during application and made sure the room was well ventilated to keep the smell out of the rest of the home. After it dries the smell disappears. I did three coats for enough coverage to waterproof the shower walls and ceiling. I used this along with a traditional shower bed with CPE liner (with radiant heating wire). Modified thinset (Versabond rocks!) had no problem sticking to the Redgard, even using large 12x24" tiles on part of the wall. I will definitely be using Redgard for all future shower projects. April 21, 2015
Rated 5.0 out of 5.0 by Saved a tile job gone bad. I had never heard of this product, but learned about it in order to salvage a bad shower tile installation job that was stopped before it got worse. It goes on easily and creates a totally water proof barrier behind your tile. No more finding out two years from now that the installer screwed up and now you have major problems because of leaks in your shower. The only thing I would add to their instructions is to ignore using a trowel. The stuff is too thin. Just use a big paint brush and slosh it on in the corners and over the mesh tape along the seams. Then use a roller to do the flat surfaces. July 16, 2014
Rated 5.0 out of 5.0 by The Redgard is an amazing product The product was so easy to apply with a paint brush or roller. The best advice I can tell you is: make sure you have a clean room. Also, when applying make sure you have a smooth application as it does not flatten out like paint will. July 8, 2014
Rated 5.0 out of 5.0 by Should be a must for building codes I specialize in bathroom remodels, and this product should be required anytime a shower is being built. I've been using it for over 6 years. it is easily applied and dries fairly quickly depending upon atmosphere conditions. I will not do a job without redgarding the entire shower. It works great for a crack suppressant also. do yourself a huge favor, bite the bullet and spend the money, its worth every penny to know you shower won't leak March 29, 2015
Rated 5.0 out of 5.0 by Product has superior quality Easy to use. Just follow directions. Installed product on basement floor before installing tile. May 13, 2014
Rated 5.0 out of 5.0 by use this under tile This is expensive stuff, but well worth it. We built slab on grade with radiant floor heat, so our floor tile is set on concrete. We now use it under all floor tile and no longer get any more cracked tiles after installation. East to install and goes a long ways, more than stated on container. July 14, 2015
Rated 5.0 out of 5.0 by Very Happy with this product I used this product for one of my current projects. Straight forward and easy to understand instructions. Follow the instructions and you should do well. I used it on the bathroom floor in addition to the shower floors and walls in two bathrooms. I believe using this product (something you won't see) was well worth the investment to protect the greater investment in what you do see. September 23, 2014
Rated 5.0 out of 5.0 by does as it says on the tin great product, fridge leaked a day after application, and water was easily mopped up with no damage or seepage. Excellent. June 30, 2015
  • 2015-08-02T12:23:12.451-05:00
  • bvseo_lps, prod_bvrr, vn_prr_5.6
  • cp-1, bvpage1
  • co_hasreviews, tv_25, tr_25
  • loc_en_US, sid_100678063, prod, sort_default
2 >>


Standard Shipping includes delivery by small parcel service. Processing time varies by product.

If product is eligible for shipping to AK, HI and US Territories additional transit time and remote surcharges may apply.