Do these spacers provide sufficient space to run horizontal and vertical rebar between the block or are larger spacers required when using rebar?

The spacers give the block a 1/4" spacing each direction. With the natural cavity of the block added to the 1/4" there is plenty of room for panel anchors and panel reinforcement to be used with the spacers.

It takes 2 plastic pieces to make one spacer. Does the count of 24 per bag mean 24 spacers or 24 plastic pieces?

The bag contains 24 spacers (48 plastic pieces).

Will these spacers work for the 8x8x4 Decora Glass Block?

The universal spacers will work with the 8x8x4 Decora glass block. These spacers come in two pieces that snap together and depending on which holes you use, will work for either 3" or 4" glass blocks in the mortar application.

Are these used for installling glass block with silicone adhesive/caulk?

No they are used for the mortar application. If you want the silicone spacers you need to find Pro-Vantage for 4" block or Residential silicone spacers for 3". We have them on our website under mortarless accessories. Call me if you need assistance 815.416.1007

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🔧 Elevate your glass block game with precision spacers that pros trust!

EMBEDDED STABILITY - Spacer remains embedded in the mortar joint with a twist-off alignment tab for a clean, finished look.
BUILT IN CONSISTENCY - Ensures a nominal 1/4 inch mortar joint, delivering professional-grade, uniform results every time.
EFFORTLESS INSTALLATION - Innovative snap-together 2-piece spacers speed up your workflow and reduce installation errors.
UNIVERSAL COMPATIBILITY - Works seamlessly with all brands of 3-inch and 4-inch glass blocks—no guesswork needed.
PRECISION ALIGNMENT EVERY TIME - Keeps glass blocks perfectly aligned horizontally and vertically for flawless installations.

Pittsburgh Corning Corp.'s Glass Block Mortar Spacers come in a 24-piece pack designed to ensure perfect alignment and consistent 1/4 inch mortar joints for 3" and 4" glass blocks. Featuring a snap-together 2-piece design, these spacers simplify installation and remain embedded for lasting stability, compatible with all glass block brands.

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Yes, all products are sourced directly from authorized retailers in the US, UK, UAE and India. We maintain strict quality control processes and verify each product before shipping. All items come with applicable manufacturer warranties and are covered by our standard return policy.

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Trustpilot

TrustScore 4.5 | 7,300+ reviews

Suresh K.

Very impressed with the quality and fast delivery. Will shop here again.

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The product quality is outstanding. Exactly what I needed for my work.

1 month ago

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Manufacturer	Pittsburgh Corning Corp.
Part Number	110609
Product Dimensions	15.24 x 12.7 x 15.24 cm; 340.19 g
Item model number	110609
Finish	opaque
Material	Plastic
Item Package Quantity	1
Number of Pieces	24
Measurement System	inch
Batteries included?	No
Batteries Required?	No
Item Weight	340 g

PITTSBURGH CORNING CORP. Glass Block Mortar Spacer, 24-Pk.

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