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Fire-Rated, Safety-Rated Glass Ceramic with Surface-Applied Film

FireLite® NT is a 3/16" (5 mm) thick glazing material, composed of FireLite and surface-applied approved fire-rated film. FireLite NT is listed for use in doors, sidelites, transoms and borrowed lites. It is available in two different surface conditions for clear viewing, premium grade and standard grade.



Now with ultraHD® Technology for improved color, clarity and surface quality
  • Available in two surface conditions for clear viewing,
    Premium Grade and Standard Grade
  • Fire-rated for up to 3 hours with hose stream test
  • Impact safety-rated ANSI Z97.1 and CPSC 16CFR1201 (Cat. I and II)
  • Glass ceramic with high performance surface-applied approved fire-rated film
  • Clear and wireless
  • Withstands thermal shock
  • Large sizes available
  • Protects from fire and impact on both sides of the glass


Classified and labeled by Underwriters Laboratories, Inc.® and Underwriters Laboratories of Canada. File number for labeled fire-rated assemblies is R13377. Tests performed in accordance with UL 9, UL 10B, UL 10C, ASTM E2074, CSFM 43.7, NFPA 80, NFPA 252, NFPA 257, UBC 43.2, UBC 43.4, UBC 7-2, UBC 7-4, CAN4 S-104 and CAN4 S-106. Approved for use in New York City: MEA 290-90-M-6. 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 min. to 60 min. Doors (non-temp rise) 3,204/22.25 36 89
  Doors (temp rise) 100/0.69 12 33
  Other than doors 3,325/23.09 95 95
90 min. Doors (non-temp rise) 2,034/14.13 36 56-1/2"
  Doors (temp rise) 100/0.69 12 33
  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.


All glass designated on the drawings as fire-rated shall be nominal 3/16" (5 mm) thick FireLite NT supplied by Technical Glass Products. The surface condition shall be either: FireLite NT Premium Grade (both surfaces are polished to eliminate any distortion; industry leader for quality and unmatched by alternative products or production methods); FireLite Standard Grade (may have slight surface waviness or imperfections which may become more apparent in larger sheet sizes; comparable to alternative fire-rated ceramics that are marketed as having a "Premium" finish); or Obscure FireLite NT (patterned surface).

Surface Options

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 SHT at 800.426.0279 or to request a sample kit.

Click on the images below for a larger view.

FireLite Standard Grade:
May have slight surface imperfections, which may become more apparent in larger sheet sizes. FireLite Standard Grade is comparable to alternative fire-rated ceramics that are marketed as having a “Premium” finish.
FireLite Premium Grade:
Both surfaces are polished to minimize distortion and provide superior surface quality. FireLite Premium Grade is the industry leader for quality and is unmatched by alternative products or production methods.
FireLite Obscure Grade:
The glass-ceramic features a patterned surface to allow more privacy.


Thickness: 3/16" (5 mm) overall
Weight 2.4 lb/ft2
Approx. Visible Transmission: 88%
Approx. Visible Reflection: 9%
Hardness (Vicker's Scale): 700
Fire Rating: 20 minutes to 3 hours
STC Rating: 35 db
Impact safety-rated: Meets ANSI Z97.1 and CPSC 16CFR1201 (Cat. I and II)

Figures are for Premium Grade FireLite NT. Figures will differ slightly for Standard Grade and
Obscure (patterned) surface finishes.

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.

Traditional Hollow Metal Steel Frames-Fire-Rated Doors & Frames
SHT glazing can be used in any approved fire-rated door and frame assemblies.


  • Care must be taken not to scratch the film.
  • Do not use bristle brushes or abrasive cleaning materials.
  • Cleaning methods used should be similar to those used on Plexiglas®.
  • A soft cloth or clean synthetic sponge is recommended for washing. Do not use the same
    towel or sponge for wiping sills or frames.
  • A squeegee of 70 - 85 durometer hardness is recommended for removal of wash water
    and dirt from the film.
  • Do not apply heavy pressure in any cleaning operation.
  • Do not leave the film wet.
  • Make sure you use a different sponge, cleaning cloth and water bucket for cleaning the outside and the inside of the windows.
  • A little extra detergent for cleaning the film side will make using the squeegee easier.