Fire-rated glass and framing products from Technical Glass Products (TGP)


Fire-rated glass and framing products from Technical Glass Products (TGP)
Call Technical Glass Products menu

FireLite IGU

Fire-Rated or Fire/Impact Safety-Rated Insulated Glass Units

FireLite® IGU is composed of FireLite products and tempered or annealed float glass with an insulating air space between the pieces of glass.
*3 hour rated units must be specified with FireLite NT® or FireLite Plus®.

20-180 Minutes

Fire-rated Hose Stream Tested Impact-rated Energy Efficient Positive Pressure UL Listed and Labeled
ultraHD UL
Volkswagen Assembly Plant designed with Fireframes® Curtainwall Series frames and FireLite® IGU doors

Docs & Downloads

Product Fact Sheet

CSI Format Specs

Premium FireLite FAQ

Product Comparison Chart


See the ultraHD difference

  • Now with ultraHD® Technology for improved color, clarity and surface quality
  • Available in two surface finishes for clear viewing, Premium Grade and Standard Grade
  • May be lightly sandblasted or etched on one side without affecting  fire rating
  • Passes positive pressure test standards UL 10C
  • 10 year limited warranty
  • Stainless steel spacers
  • Decorative films applied by TGP
  • Fire-rated for up to 3 hours with hose stream test
  • Clear and wireless
  • Impact safety-rated version meets ANSI Z97.1 and CPSC 16CFR1201 (Cat. I and II)
  • Large sizes available
  • Typical 1" thickness fits in Fireframes® Designer Series or Fireframes Hardwood Series framing from TGP, or standard hollow metal frames
  • Available incorporating a variety of glass products, including (but not limited to):
    • Tinted
    • Low-E
    • Reflective
    • One-Way Mirror
    • Art


Classified and labeled by Underwriters Laboratories, Inc.® and Underwriters Laboratories of Canada. File number for labeled fire-rated assemblies is R13377. All tests performed in accordance with UL 9, UL 10B, UL 10C, ASTM E2074, CSFM 43.7, NFPA 80, NFPA 252, NFPA 257, CAN4 S-104 and CAN4 S-106.  Approved for use in Los Angeles: LARR 25798.

Rating Assembly Max. Exposed
Area (in2/ft2)
Max. Width
Of Exposed
Glazing (in)
Max. Height
Of Exposed
Glazing (in)
20-60 min. Doors (non-temp rise)  3,204/22.25  36  89
20-60 min. Doors (temp rise)  100/0.69 12   33
20-60 min. Other than doors 3,325/23.09  95  95
90 min. Doors (non-temp rise) 2,034/14.13 36 56-1/2" 
90 min. Doors (temp rise) 100/0.69 12 33 
90 min. Other than doors   2,627/18.24  56-1/2"  56-1/2"
3 hour Doors 100/0.69 12 33

Check with frame manufacturer for maximum tested glass sizes and required stop height.

Note: Individual lite sizes cannot exceed "Max. Exposed Area" shown above.

This information is intended for general reference only. For current listing details, please call Technical Glass Products.


  • Exterior applications where energy codes require an insulated product
  • Interior applications with special needs such as sound reduction


Seal: Dual-seal polysulfide units with breather tubes
U-Value: Similar to standard insulating units with a make-up of:
1/4" float glass - 1/2" air space - 1/4" float glass
Summer U-Value: Approximately .55*
Winter U-Value: Approximately .49*
STC Rating: 3/16" FireLite - 9/16" air space - 1/4" float glass = Approx. 35**
3/16" FireLite NT - 9/16" air space - 1/4" float glass = Approx. 35**
5/16" FireLite Plus - 9/16" air space - 1/4" float glass = Approx. 38**

*U-values increase with use of high performance float glass producers.

**Values were achieved with these specific make ups.

Surface Options

See the ultraHD difference

Because FireLite is made from transparent glass-ceramic, it differs in color from float glass. FireLite appears to have a warmer earth tone when compared to the blue green tint of typical float glass. However, like float glass, FireLite ceramic will not demonstrate a highly perceptible color once installed in a frame. Additionally, FireLite products are manufactured in three distinct surface grades (Premium, Standard and Obscure) that are best reviewed prior to specification. Please contact TGP at 800.426.0279 or to request a sample kit.

Click on the images below for a larger view.

 FireLite Standard Grade:
FireLite Standard Grade polished surface quality is comparable to alternative fire-rated ceramics that are marketed as having a premium finish.

For more information about FireLite surface grades, please see our Premium FireLite FAQ.
 FireLite Premium Grade:
FireLite Premium Grade is the industry leader for quality and is unmatched by alternative products or production methods. Both of its surfaces are ground and polished to provide superior surface quality, improving the overall clarity.

For more information about FireLite surface grades, please see our Premium FireLite FAQ.
 FireLite Obscure Grade:
The glass-ceramic features a patterned surface to allow more privacy.

Framing Options


Designer Series - 20/45/60/90 Minute Fire-Rated Doors & Frames

The Designer Series doors and frames incorporate precise European engineering, providing a sleek, modern alternative to traditional hollow metal frames.

Hardwood Series - 20/45/60 Minute Fire-Rated Doors & Frames

Designed for maximum durability and performance, the Hardwood Series offers an attractive alternative to traditional hollow metal frames. Available with fire ratings from 20 to 60 minutes, this system can incorporate a wide range of fire-rated glazing materials with glass sizes that surpass traditional systems.

Traditional Hollow Metal Steel Frames-Fire-Rated Doors & Frames

TGP glazing can be used in any approved fire-rated door and frame assemblies.

Storage & Handling

FireLite IGU must be handled with care during transportation, storage, inspection and installation. Store in a dry place.

Care & Warranty

To maintain aesthetics, it is important to clean the glass during and after construction. For routine cleaning, use a soft, clean, grit-free cloth and a mild soap, detergent, or nonabrasive window cleaning solution.

Rinse immediately with clean water and remove any excess water from the glass surface with a squeegee. Do not allow any metal or hard parts of the cleaning equipment to contact the glass surface.

Failure to comply with these care and cleaning guidelines may result in loss of warranty.

Download a PDF of our Care & Warranty Brochure.

View Full Site