Model # 120610

Internet #202836643

Pittsburgh Corning Thinline 3 in. x 31-1/2 in. Glass Block Track Spacers (6-Pack)

Discontinued Pittsburgh Corning

Thinline 3 in. x 31-1/2 in. Glass Block Track Spacers (6-Pack)

  • The spacers helped align the block and stabilizing the wall
  • Makes installing the 3 in glass block very easy
  • Great for the do it yourselfer
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Frequently Bought Together

Product Overview

Pittsburgh Corning Corp 3 in. x 31-1/2 in. Track Spacers for Thinline Series Glass Blocks (6-Pack) help create consistent, evenly spaced joints. They are designed for straight window or wall applications.

  • For use only with Thinline Series glass blocks
  • Designed for straight window or wall applications
  • Useful for creating consistent and evenly spaced joints
  • Includes 6 spacers

Info & Guides

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Product Depth (in.)
Product Thickness (in.)
3 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 within five years from date of purchase.

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Customer Questions & Answers

Can i use this on the 3" glass blocks? Its edge to edge 3" wide.

Can i use this on the 3" glass blocks? Its edge to edge 3" wide.
Asked by: Nischell
This spacer is for use only with Thinline Series glass blocks.
Answered by: CommunityAnswer
Date published: 2015-09-20

3" vs. 4" blocks

Can I use 3" blocks for an exterior window 4'x6' or do I need 4" blocks. Is it ok to piece horz. spacers. my window is 48", spacers only 31.5", and lastly do I need anchors on a window this size? Thanks.
Asked by: Mike
You just butt the spacers against each other for longer panels. The Thinline Track Spacer System used Perimeter Channel Thinline Series #130909 for anchoring.
Answered by: PittsburghCorning
Date published: 2016-08-06

Can this piece be used as a vertical spacer?

I am building a glass block window that measures roughly 39 inches wide by 31 inches tall. Would I be able to use this piece as my vertical spacer and the shorter segments as horizontal spacers?
Asked by: John
The 31-1/2" ThinLine Track Spacer is used both vertically and horizontally. There are marks on the spacer to show where to cut them for the vertical spacers for the 8" blocks.
Answered by: PittsburghCorning
Date published: 2016-07-11

do the 3 inch spacers go in the 4 inch blocks

Asked by: John
The system used for the 4" Premiere Series Glass Blocks with silicone is called the ProVantage Installation System. You will use the ProVantage Horizontal and Vertical Spacers for the 4" blocks.
Answered by: PittsburghCorning
Date published: 2015-09-20
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Customer Reviews

Thinline 3 in. x 31-1/2 in. Glass Block Track Spacers (6-Pack) is rated 3.0 out of 5 by 5.
Rated 3 out of 5 by from They do their job. These do help evenly space the block and (if the central groove is engaged with the blocks' central ridge) help strengthen the wall. If you need to space your blocks further apart horizontally to fit the rough opening, try putting a shim inside the spacer to fatten it. The price is exorbitant at $3/stick (for PVC plastic!?). You will find that accessories like spacers, channels, etc. are about as expensive as the block. However, Home Depot seems to have the best prices and free shipping is greatly appreciated. Thank you HD. I wish the spacer sticks were longer than 31.5". I waste a couple of inches on each stick when I cut them up for vertical spacers (with sheet metal shears). A multiple of 7.5" (like 37.5") would make sense. It's gonna look good when I'm finished.
Date published: 2013-03-26
Rated 3 out of 5 by from Stickers!! Each spacer had a bar code sticker that was difficult to remove. Removal damaged the spacers. There was no need for the stickers to be on each piece, since the spacers are sold by the carton, and the carton has a sticker. The stickers required the use of both a heat gun and lacquer thinner to remove.
Date published: 2012-03-13
Rated 1 out of 5 by from Work great, didn't receive full order Easy to use. Provides a stable guide to build a wall. Unfortunately, the 3rd box only contained 2 pieces. Ordered total of 18, only received 14. Nice product, not so nice receiving less than we paid for and being short on completing the project.
Date published: 2014-12-21
Rated 4 out of 5 by from Good products for the DYI individual Easy to trim, easy to work with, works great in re-enforcing the 3" glass blocks as stated.
Date published: 2014-01-27
Rated 4 out of 5 by from Different size made sense. I ordered this width and length to finish a block job. This size would have been better to start with considering I needed 15 & 1/2 inch lengths. The grove down the middle held the block in line just fine and the block I used it on was high enough there is no pressure against them, so width wasn't needed. The wider spacers were the only size showing for my first order. They ended up with about 13 inches of waste on each strip which ran me short. Was able to cut them and use for vertical pieces.
Date published: 2015-02-04
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