Model # 120609

Internet #202957300

Pittsburgh Corning White Glass Block Mortar Spacers (48-Pack)

Discontinued Pittsburgh Corning

White Glass Block Mortar Spacers (48-Pack)

  • This spacer will allow a novice to install block like a pro
  • Works for either 3 in or 4 in thick glass block
  • Not visable in the finished glass block wall
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Frequently Bought Together

Product Overview

Lay a glass block wall quickly and easily with these Pittsburgh Corning White Glass Block Mortar Spacers (48-Pack) for use with Premier or Thinline series blocks. The spacers help ensure consistent joint thicknesses.

  • Facilitates glass block installation
  • For use with the Premier series or Thinline series of glass block
  • Helps provide a consistent mortar joint thickness
  • Made in USA
  • Includes 48 spacers

Info & Guides

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Product Depth (in.)
Product Thickness (in.)
6 in
Product Width (in.)


Product Weight (lb.)

Warranty / Certifications

Manufacturer Warranty
Pittsburgh Corning promises to replace any glass block accessory that is found to be defective with-in 5 years

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Customer Questions & Answers

Single stack of Glass blocks as side light for entrance

I have a 93/4" wide space (2/4" framed) next to a new entry door and would like to use a single stack of 8/8 glass blocks as a sidelight. What misc. supplies and tools do I need? How much space will be left to be filled in with wood? Do you have another suggestion for filling the space? Thank you
Asked by: Alex
If you use the ProVantage II Installation, you r/o width should be 8-1/4" - that leave you with 1-1/2." You could trim out with 1x's on both sides and that would bring you to 8-1/4." In addition to the glass blocks, you will need ProVantage Vertical Spacers (use as Horizontal Spacers), Expansion Strips (cut to 7-1/2" and use between the glass blocks and sides), ProVantage Anchors, Pittsburgh Corning Glass Block Sealant, ProVantage Glass Block Surface Grout (if finishing joints with grout. you can use either grout or glass block sealant to finish the joints), Grout sealer if finishing joints with grout, 1-1/2" Flat Head Stainless Steel Screws - 2/anchor.
Answered by: PittsburghCorning
Date published: 2016-07-09

do you offer installation instructions? We are removing a 2'sq. window and replacing with block.what do we need to do the install?? thanks

Want to use décor 6x6x3" block model #110091
Asked by: Kayo
The installation instructions are in with the Thinline Track Spacers. Here is a list of what you will need: 16 ea - 6x6x3 Pittsburgh Corning Glass Blocks, 6 ea - Thinline Track Spacers #120610, 2 ea - Perimeter Channel Thinline Series #130909, 1 tube - Pittsburgh Corning Glass Block Sealant, 2 tubes if finishing joints with sealant, 1 bucket - ProVantage Glass Block Surface Grout, (grout finish only), Grout Sealer (by others) (grout finish only. 24 ea (approx) - #6 x 1-1/2" Flat Head Galavnized Screws (by others)
Answered by: PittsburghCorning
Date published: 2016-06-07

Does a 48-pack of spacers have 96 halves that one snaps together to make 48 complete spacers, or 48 halves that make 24 spacers?

Asked by: Mark
There are 48 complete spacers (96 halves) per pack.
Answered by: PittsburghCorning
Date published: 2016-05-16

is the spacing adjustable? What is minimum/maximum? This is for shower application

Asked by: Rick
The mortar spacers create a 1/4" joint. The maximum recommended mortar joint is 5/8" and the minimum is 1/8." for a joint size other than 1/4", you could create your own spacer or free lay the blocks.
Answered by: PittsburghCorningTechExpert
Date published: 2015-09-20
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Customer Reviews

White Glass Block Mortar Spacers (48-Pack) is rated 4.3 out of 5 by 3.
Rated 4 out of 5 by from Glass Block Mortar Spacers work really well These little guys will allow a novice to install glass blocks like a pro. They insure uniformity in the mortar joints. My only problem was when I needed to break off the horizontal legs to use them as end of row spacers. The verticals have a weakened spot to allow them to snap off easily, the horizontals don't have that. I ended up cutting them off with diagonal cutters and smoothing them with a bench grinder. A little more work, but they all worked great in the end and the glass block window looks professional. These seem to me to be a little expensive for what they are, but it's the only game in town.
Date published: 2012-01-24
Rated 4 out of 5 by from Good spacers Spacers work as advertised. Docked one star because I think it should be a 50 pack - two of the plastic spacers broke before installation therefore I only got 46 usable spacers from one pack. Free HD delivery is nice.
Date published: 2015-08-25
Rated 5 out of 5 by from Without these spacers a motar glass block installation would be impossible This a handy package to have the option to be able to use For either size block and not be stuck with unusable parts for future projects
Date published: 2013-01-08
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