Custom Building Products FlexBond White 50 lb. Crack Prevention Mortar-FBW50 - The Home Depot
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Custom Building Products

Model # FBW50

Internet # 100161308

Store SKU # 373194

FlexBond White 50 lb. Crack Prevention Mortar

Custom Building Products FlexBond White 50 lb. Crack Prevention Mortar

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

$32.47 / each
Bulk Price Discount Available
This item qualifies for a bulk price discount
if you purchase at least 10 units. The
adjusted price will display in the Cart.


Model # FBW50

Internet # 100161308

Store SKU # 373194

Store SO SKU # 1000063655

Custom Building Products FlexBond 50 lb. Fortified Thin-Set Mortar is a premium quality, polymer-modified mortar with exceptional flexibility and bond strength. Great for tiling difficult surfaces, such as plywood, vinyl and laminates as well as hard to bond, nonporous tile such as porcelain and glass. Protects against cracking caused by minor in-plane surface movement.

California residents: see  Proposition 65 information

  • Isolates cracks to 1/16 in. and can be applied over cracks to 1/16 in. without additional preparation
  • Add water and mix to apply
  • Covers up to 100 sq. ft.
  • Dries in 24 hours
  • Exceeds ANSI A118.4 and A118.11 specifications
  • Resists mold and mildew
  • Qualifies for a lifetime system warranty

Info & Guides

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Maximum coverage area (sq. ft.) 
Product Depth (in.) 
Product Height (in.) 
Product Width (in.) 
Additive required 
Color Family 
Commercial / Residential 
Commercial / Residential 
Dry time (hours) 
Floor/wall use 
Floor and wall 
Flooring Product Type 
Ceramic Floor/Wall Tile 
Mold and mildew resistant 
Product Weight (lb.) 
50 lb 
Product type 
Warranty / Certifications
Manufacturer Warranty 
1 year product 


Rated 4.6 out of 5 by 11 reviewers.
Rated 4.0 out of 5.0 by profitable purchase From a Pro's prespective this is a good product at a fair price. I wish they would make it in recyclable tough plastic bags thus reducing sloppy handling punctures and waste. Product performs well . December 30, 2014
Rated 5.0 out of 5.0 by Great mortar! This thin set was very easy to spread and mix (some calculation is required for smaller batches). I did have 1 or 2 tiles break, but I didn't spread enough mortar on an uneven floor. When I added more mortar and a fresh tile it worked great! I feel the floor is very sturdy now. Only time will tell if the mortar helps prevent cracks. September 30, 2014
Rated 5.0 out of 5.0 by Would use again and again and ....... I had never used thin-set before and would use this again for any future project. I cheated and buttered the tile instead of putting it on the wall first because the backer board would suck the moister out, greatly lessening the working time. May not be the way a pro would do it, but I could work in a less hurried pace reducing wasted mortar. I think it was justified to pay a premium $$$ over regular thin-set. July 19, 2012
Rated 5.0 out of 5.0 by recommended for DIY While doing my kitchen floor I tried both Home Depot and Lowes varieties of fortified thinset. Both types of home depot thinset mortar (versabond regular and flexbond) outperformed lowes brand in mixability and how smooth it goes down. It's hard to describe the difference but trust me, Versabond mixes smoother and makes more even rows than the Lowes brand. I can't rate on long term durability yet, but the product is definately fortified, it sticks very well to everything it touches. April 24, 2012
Rated 5.0 out of 5.0 by Versatile and strong I remodeled a bath and used this product for the walls and radiant floor . First, I spread a layer of thin set on the floor to cover the heating cable. It went down smoothly and was easy to trowel pretty smooth. When it set up, I saw some unacceptable ridges. I used a regular surform plane to shave the ridges and it worked like a charm! Setting the tile was a snap. One caution, I almost burned out my corded electric drill trying to mix the first batch...use a stick and a trowel. Your arms and shoulders need the workout, anyway. May 16, 2013
Rated 5.0 out of 5.0 by Flexbond Easy to use, if you followed the instructions. Used 1 cup of Flexbond and 6oz of water and I was able to stir without drill mixer. This allowed me to set about 5 tiles that were 12 x12. If you don't use quickly then it sets pretty quick in your container. June 3, 2014
Rated 5.0 out of 5.0 by Very easy product to work with. It has good bonding power. It's easy to work with. August 10, 2013
Rated 4.0 out of 5.0 by good stuff does not rip rub or tear slip slap or slide or stink when it gets old. August 5, 2014
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Store Exclusive. This item is available for purchase in select stores only.