Spandrel Glass

Spandrel glass panels are opaque, colored panels designed to hide the electrical and mechanical areas between the floors of a building. To opacify glass for use in a spandrel application, Goldray Glass has several decorative glass techniques to choose from, including: OPACI-COAT-300®, Digital Ceramic Printing, and Ceramic Frit.

The most commonly used coating for spandrel panels, OPACI-COAT-300® is a water-based, silicone glass coating that can be applied to any glass type to provide opacification. Goldray Glass is proud to partner with ICD Coatings as an Approved Factory Fabricator of OPACI-COAT-300®. With a wide color range, superior durability, and fallout protection, OPACI-COAT-300® provides architects and designers with more design opportunities than any other coating for glass.

Product Specifications


Glass Thickness:
3mm (1/8") to 19mm (3/4").
Full coverage.
Both standard and custom color options available.
Exterior applications must be on an interior surface and not exposed to the elements.
Standard seamed-edge. Flat polished or flat ground edge also available.
Available for specific installation and hardware requirements. (See Fabrication Limitations for more information).

Technical Data

Film Thickness:
12 - 25 microns (ASTM D 1212 & ASTM D 823)
Average Opacity:
< .5%
Color Tolerance:
1 Delta E (CIE LAB) (ASTM D 2244)
Passes ASTM D 3359
Tested Installation Materials:
Dow 795 Silicone (in compatible color)

Applicable Industry Standards

ASTM C1036
Standard Specification for Flat Glass
ASTM C1048
Standard Specification for Heat-Treated Flat Glass-Kind HS, Kind FT Coated and Uncoated Glass
ASTM C1172
Standard Specification for Laminated Architectural Flat Glass

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