Spandrel Glass

Spandrel glass's basic feature is to cover necessary areas such as construction materials and is commonly used between floors, ceilings, columns, or spaces that require a uniform appearance.

What is Spandrel Glass


Spandrel glass is an opaque panel mainly used in non-vision sections of curtain walls. The panels are located between sections of transparent windows and hide the structural parts that shouldn’t be seen from the exterior. Spandrel glass is produced by applying an opacifying agent - typically a ceramic frit - to a glass substrate. Spandrel glass comes in a wide array of standard and customizable colors, allowing it to complement adjacent glass or other building materials or finishes aesthetically. Because spandrel glass tends to exhibit higher heat absorption characteristics, AJJ requires that all spandrel products be heat treated to address heightened thermal stress conditions that could adversely affect glass and window seal durability. Spandrel glass is not intended for use in applications that lack a uniform, opaque backdrop or in areas where the spandrel material will have direct outdoor exposure.


Spandrel Glass

Why Choose AJJ Spandrel Glass

The Power of Quality

Multiple Material Options

AJJ offers both Ceramic Frit and Opaci-Coat Spandrel material options. Depending on your specific application needs and design intent, AJJ Glass can work to guide you toward the appropriate spandrel material solution.

Fall-Out Protection

The Silicone-based paint (Opaci-Coat 300) spandrel product offered by AJJ may serve as a means to offer glass fallout protection without the use of traditional fallout product options such as tapes or films.

Large Stock Collection

AJJ carries a large selection of stock glass color options, cutting down on lead time and helping you complete projects faster.

Highly Accurate Custom Color Matching

Creating a custom color is often as easy as identifying a desirable color swatch and sending it to AJJ for matching.

Design Assistance

Our trusted and experienced design team can help you identify the best makeup and color to be harmonized with the surrounding environment.

Key Features of Spandrel Glass

Key Product Features

Boundless Color Options

Work with AJJ's experienced design team to identify the ideal spandrel color for your building.

Tight Color Tolerance

Spandrel glass has one of the tightest color tolerances in the coatings industry, which increases the aesthetic reliability from sample to final coated glass.

Environmentally Friendly

Opaci-Coat products are lead-free and have an ultra-low volatile organic compound (VOC) in application and zero VOC when cured.

Helps Reduce Heat Gain

Spandrel glass works to reduce the penetration of heat into interior building spaces effectively.

Spandrel Glass Technical Specifications

Applications, Production Capacity & Considerations

  • AJJ opaque ceramic frit coating offers outstanding resistance to cracks, scratches, fading, and chemical products
  • Available in 14 standard colors, custom colors can also be developed from samples provided by the designer.
  • AJJ opaque ceramic coating is applied on the surface of the glass using a horizontal roller applicator.  The glass is then heated in a furnace at a temperature of about 621°C (1150°F).  This treatment fuses the ceramic to the surface of the glass.
  • Once the heat treatment is completed, the ceramic coating is extremely resistant to cracking, fading as well as chemical attacks.


Curtain walls, storefronts, commercial fixed windows, hide structural elements & utilities, custom color applications, non-vision areas, creates a wide range of visual effects, security for fall out protection ANSI Standard Z97.1


Wall cladding


The ceramic coating is applied on face #2 on the supporting lite of glass.

* The glass must be heat-strengthened or fully tempered.  It is not recommended to expose the ceramic coating to the elements. Use on an external face should be avoided.


The ceramic coating can be applied on face # 2, 3, or 4 of laminated glass.

* All the glass plies that make up the laminated glazing should be heat-strengthened or fully tempered for exterior applications.


The ceramic coating is applied on face #4 of the insulated glass unit.

*  The two lines that make up the unit should be heat-strengthened or fully tempered.

*Certain conditions apply. Contact us for more information.

Ultraclear (Low iron), Clear, Tinted, Low-E, Laminated, Bent, Tempered, Heat-Strengthened.

  • Minimum Size: 300 x 300mm
  • Maximum Size: 3660 x 18000mm

America Standards:

  • ANSI Z97.1 – Safety glazing materials used in buildings. This standard provides guidelines for safety glazing materials in residential and commercial applications, including tempered glass. It specifies the performance criteria for impact resistance and requires glass to meet certain fragmentation requirements.
  • ASTM C1036 – Flat Glass.
  • ASTM – C1048 – Heat-treated flat glass. This standard sets the minimum requirements for tempered flat glass. It covers glass thickness, surface compression, and fragmentation characteristics.
  • CAN/CGSB 12.1 – Safety or laminated glass,
  • CPSC 16 CFR- 1201 – The Consumer Product Safety Commission (CPSC) standard in the United States sets the requirements for architectural glazing materials, including tempered glass. It tests the glass for impact resistance and establishes different categories based on the glass thickness and the drop height required to break it.

Australian Standards:

Architectural – 4mm to 12mm Grade ‘A’ safety glass manufactured to AS/NZS 2208-1996 Safety glazing materials in buildings and 15mm to 19mm Toughened glass.

The Australian/New Zealand standard for safety glazing materials assesses the impact resistance of tempered glass. It classifies glass based on the drop height required to break it and provides guidelines for its use in different applications.

British & European Standards

  • BS 6206 - ' Code of practice for glazing for buildings'. Part 4: 1994 'Safety related to human impact'
  • BS EN 12600:2002 - Glass in building. Thermally toughened soda lime silicate safety glass.
  • EN 12150:2015 - This European Standard specifies tolerances, flatness, edgework, fragmentation, and physical and mechanical characteristics of monolithic flat thermally toughened glass.

Get in touch with our team to get a quote or free sample now