WireLite® NT is a 1/4″ (6 mm) glazing material composed of wired glass and a fire-rated surface-applied film. WireLite NT is listed for use in doors, sidelites, transoms and borrowed lites.

  • Fire-rated for 20, 45, 60 and 90 minutes with required hose stream test
  • Impact safety-rated – ANSI Z97.1 and CPSC 16CFR1201 (Cat. I and II)
  • Wired glass with high performance surface-applied fire-rated film
  • Available in Diamond Clear (3/4″ pattern) and Georgian Clear (1/2″ pattern)
  • Available as an insulated glass unit (IGU)
  • Withstands thermal shock
  • Passes positive pressure test standards UL 10C
  • 3-year limited warranty*
  • Note: This product is not a barrier to radiant heat. This product does not meet test standards ASTM E-119 or UL 263. If your jurisdiction requires a “barrier to heat” product, please see Pilkington Pyrostop.

Classified and labeled by Underwriters Laboratories, Inc.® and Underwriters Laboratories of Canada. Test report number for labeled fire-rated assemblies is UL File No. R13377. Tests performed in accordance with UL 9, UL 10C, ASTM E2010, NFPA 252, and NFPA 257.

RatingAssemblyMax. Exposed Area (in. x 2/ft x 2)Max Width of Exposed GlazingMax. Height of Exposed Glazing
20 min. to 60 min.Doors (non-temp rise)3,204/22.253689
Doors (temp rise)100/0.691233
Other than doors3,325/23.099595
90 min.Doors (non-temp rise)2,034/14.133656-1/2
Doors (temp rise)100/0.691233
Other than doors2,627/18.2456-1/256-1/2
3 hoursDoors100/0.691233
ThicknessNominal 5/16" (8 mm) thick overall
Weight:4 lb/ft
Fire Rating20 min. to 3 hrs
Approx. Visible Transmission:85%
Impact Safety Rating:Meets ANSI Z97.1 and CPSC 16CFR1201 (Cat. I and II)
Approx. Visible Reflection:9%
Hardness (Vicker’s Scale):700
STC Rating38