Marshalltown 6 in. x 3 in. 20-Grit Concrete Rub Brick-840-HD - The Home Depot


Model # 840-HD

Internet # 100318060

Store SKU # 334979

6 in. x 3 in. 20-Grit Concrete Rub Brick

Marshalltown 6 in. x 3 in. 20-Grit Concrete Rub Brick

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

$12.00 / each


Model # 840-HD

Internet # 100318060

Store SKU # 334979

Store SO SKU # 282375

The Marshalltown 6 in. x 3 in. 20-Grit Concrete Rub Brick with attached handle is ideal for removing form marks from concrete, as well as smoothing and dressing down concrete and wet tile. It is made of 20-grit fluted silicon carbide stone.

  • 20-Grit fluted silicon carbide stone
  • Attached handle
  • Ideal for dressing down and removing form marks from concrete
  • Use to smoothing and dress down wet tile


Assembled Depth (in.)  16.313 in  Assembled Height (in.)  3.875 in 
Assembled Width (in.)  6.063 in 
Concrete Tool Type  Concrete Rub Brick  Returnable  90-Day 
Warranty / Certifications
Manufacturer Warranty  For warranty information on this product, please call our Internet Customer Service Center at 1-800-435-4654 


Rated 4.3 out of 5 by 8 reviewers.
Rated 2.0 out of 5.0 by Got the job done, but not the quality expected The highlight..... lasted long enough to complete the job... Freshly poured leveling cement needed the edges and slight ridges buffed out to produce a level, smooth surface prior to painting. This rub brick is designed to accomplish this sort of task... which it did, however, The brick is held to handle via two coarse thread screws. Unfortunately, one screw was apparently over-tightened ( or maybe not) which lead to unseen fissures in the brick which crumbled into numerous pieces as I scraped the concrete surface. Yes, I did manage to finish the job at hand, but I do not find the $12 pricing of the brick to be commensurate with the quality. July 31, 2014
Rated 5.0 out of 5.0 by Works great I use this rub brick on hypertufa and cement sculptures. it cuts and leaves a nice smooth finish with ease... April 15, 2014
Rated 4.0 out of 5.0 by Nice Tool for the Job I had never before used level coating and had many rough spots. This brick was just what I needed to smooth the floor prior to a rug install. Easy to use, and light enough not too tire you out too easily December 8, 2011
Rated 5.0 out of 5.0 by Does exactly what it is made to do Cleaned up splattered concrete without a lot of effort. Nothing in life comes without a little application of elbow grease. June 10, 2014
Rated 5.0 out of 5.0 by would recommend to anyone. It works well for grinding & smoothing concrete. It removes rust spots better than anything I have used on pool pavers!. May 29, 2012
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