Custom Building Products

Model # NSG3811

Internet # 203920115

Store SKU # 1000002683

Polyblend #381 Bright White 1 lb. Non-Sanded Grout



Model # NSG3811

Internet # 203920115

Store SKU # 1000002683

Store SO SKU # 1000289819

Polyblend is America's no. 1 grout. Custom Building Products Polyblend Non-Sanded Grout is polymer modified to produce hard, dense joints that are resistant to shrinking, cracking and wear. It is formulated with proprietary technology to ensure durability, color consistency and quick setting.

California residents: see  Proposition 65 information

  • Mix with water for any tile or stone installation
  • Non-sanded for grout joints up to 1/8 in.
  • Resistant to shrinking, cracking, powdering and wear
  • Initial set in 4 hours, final set in 5 hours
  • Delivers a consistent color
  • Rated for residential to extra-heavy commercial use
  • Exceeds ANSI A118.6 standards
  • Refer to the technical data sheet for suitable tile types, limitations, installation instructions and warranty information
  • Excellent for highly-glazed ceramic tile and highly-polished marble or natural stone
  • Sample colors shown may vary from actual grout; final installed shade can differ based on tile type, porosity, job site conditions and finishing techniques

Info & Guides

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Maximum coverage area (sq. ft.) 
Product Width (in.) 
Bright White 
Color Family 
Commercial / Residential 
Commercial / Residential 
Dry time (hours) 
Floor/wall use 
Floor and wall 
Flooring Product Type 
Mold/mildew resistant 
Product Weight (lb.) 
1 lb 
Product type 
Stain Resistant 
With Treatment 
Warranty / Certifications
Lifetime Warranty 
Manufacturer Warranty 
1 Year Product 


Color Family: Whites
Product type: Powder
Sanded: No
Brand: Custom Building Products
Price: $0 - $10
Review Rating: 3 & Up


Rated 3.8 out of 5 by 19 reviewers.
Rated 5.0 out of 5.0 by Good Product This product worked well and was easy to use (you just follow the directions). You mix the powder with water right in the plastic container that it comes in. I used this to re-attach a ceramic towel rod holder to a ceramic tile bathroom wall after the holder pulled out of the wall (after more than 24 years); it worked great for this. Once it is mixed,you have to use it; it will harden up pretty quickly even if you put the lid back on the container--it does not dry, it cures or hardens like cement or plaster. It would be nice if they provided instructions on how to mix smaller batches if you don't want to use the entire amount at once. December 8, 2015
Rated 1.0 out of 5.0 by Beware Terrible Jekyll and Hyde Mixing Instructions This grout is excellent but the terrible instructions caused me to throw away the first batch I mixed and wait another day until I could buy another. They say to fill up to the fill line or to add 4.8 oz of water. I added probably a cup and a half and still wasn't close to the fill line and so stopped. Mixing it fully it had the consistency of a hearty soup, something that wouldn't stay in a vertical crack. The problem is that grout is basically cement and it is only strong if the water content is precisely controlled. More than about 10% or 20% extra water starts to terribly degrade the strength and longevity of the cured product. In this case I believe I had about 300% extra and I was not yet up to the fill line. I went back to the store and purchased a new batch and used a precision medical measurement cup to measure the water I put in. I put in 4.8 ozs approximately and it seemed too thick to work easily, so I added about another .7 oz, and it seemed about perfect. I installed the job and it has cured hard as a rock. and looks beautiful. Rather than say fill to the fill line which ruins the grout, they should throw in a measurement cup in the container to make perfect mixing easy every time, even for beginners. October 21, 2015
Rated 5.0 out of 5.0 by Used as mastic I had a 4 inch "shelf" formed by concrete blocks in front of windows on 3 sides of glassed-in porch. I wanted something flexible for a mastic because this is a cottage that is not climate controlled. Also wanted bright white backing for glass tiles. Used one inch tiles on the wood surface encasing the cement block. Used the polyblend for mastic as well as grout. Wiped surface of tiles with wet rag as I worked in patches. Wiped again after an hour with damp rag. Wiped again next day with damp rag. 2 years - still white, no cracking and so much nicer looking than the painted wood. December 2, 2015
Rated 5.0 out of 5.0 by Very good product if you do odd jobs in your house you need to have this product on hand. October 20, 2015
Rated 1.0 out of 5.0 by Ignore the fill line unless you live in the Sahara..... I filled to the fill line as the package instructed. Result: grout soup, about the consistency of Greek yogurt. No amount of stirring or slaking reduced it to a thick enough consistency to use. A waste of money. Lesson learned. March 31, 2015
Rated 4.0 out of 5.0 by Good product, but no way this covers 33 SF I'd agree with the prior post that you should just go with the 5-lb bags. I used the 1lb size for my glass mosaic backsplash & got only about 1/3 of the coverage area suggested in the specs. The product seems easy to work with, though. If you wipe off after the recommended 20-minute wait, you can get most of the haze. The bright white looks good. I just wish the coverage specs were more accurate, because I know have to go buy more on Sunday morning just to get done this weekend. July 19, 2014
Rated 4.0 out of 5.0 by Powder must be mixed w/ water I like that I can mix up the amount I need. The pkg has a "fill to line" for the water, but you can put powder is a bowl and mix with water to get the amount and consistency you need. Great for SMALL project. August 27, 2014
Rated 5.0 out of 5.0 by Best product to make chalk paint 1tblsp per cup of flat paint - Behr paint is what I use. Just add small amount of water with grout, so no lumps then add paint to grout. September 2, 2014
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