Assemble your own glass block windows at home, with a vinyl spacer. Eliminate the need to use mortar, no masonry experience required.Designed to create an “all glass” look and allow more light come through. This method requires less materials then the standard mortar installation. Quicker and easier than ever before.


Installs horizontally between each course of Imperial Premiere 4″ glass block to create smaller, even joints when using a silicone application.


Available in 40″ and 72″ lengths.


Not for use in constructing curved glass block walls.


Made in the U.S.A.