Contains smoke, flames and blocks the passage of radiant heat.

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Intertek Icon
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5 Year Warranty
Fire Rated Icon
Hose Stream Icon
Starphire Ultra Clear
CMAST Component
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Ballistic Rated Icon
Blast Rated
Forced Entry
Energy Efficient

Product Advantages

  • Maximum fire and impact safety with hose stream and provides full radiant heat protection for all W-30 applications in the IBC.
  • Largest tested and approved sizes up to 4,952 in.² (3.19 m²) in standard 1 in. (25.4 mm) profile.
  • Tint-free and optically clear.  Perfect for property line requirements.
  • Available with Starphire Ultra-Clear® glass by Vitro.
  • Now available as an approved glazing component in the NFRC CMAST database.
  • Available in custom architectural make-ups, such as laminated glass and energy-saving insulated units with NFRC certifications when used with GPX® Architectural Series Fire Resistive framing.
  • Can be customized to protect against forced entry, bullets, blast, hurricane, sound and more.
  • Standard 5 year limited warranty.
  • USA manufactured for fast lead times and competitive pricing.

maximum sizes

Fire RatingApplicationMax. CV AreaMax. CV WidthMax. CV HeightStops
45 MinutesDoors, Sidelites, Transoms,
4,952 in.²
(3.19 m²)
124 in.
(3.15 m)
124 in.
(3.15 m)
5/8 in.
(16 mm)*

Product Specifications

Thickness 1 in. (25 mm)
Weight 12 lbs. / sq. ft. (59 kg/m²)
Fire Rating 45 minutes with hose stream
Sound Transmission Rating STC 37 standard profile
STC 41 when insulated with 1/4 in. Low-E
Impact Safety Rating CPSC 16 CFR 1201 Cat. I and II, ANSI Z97.1
Visible Light Transmittance 0.789 with clear standard
0.883 with clear low-iron
Application Doors, Sidelites, Transoms, Windows/Openings
Hard Body Impact Classification ASTM C1629/C1629M Level 3
Soft Body Impact Classification ASTM E695 Level 3
Surface Abrasion Resistance ASTM D4977 Level 3
Outdoor-Indoor Transmission Class OITC 36 standard profile
OITC 34 when insulated with 1/4 in. Low-E

listings and standards

SuperLite® II-XL 45 is listed and labeled by Underwriters Laboratories and Intertek, nationally recognized testing laboratories approved by OSHA.


  • Intertek: 32841; 56534; 23164; 29689; 51170
  • UL: KCMZ.R14212; KCMZ7.R14212
  • CSFM: 4075-1660:0101
  • LARR: 25786
  • HPD: 29036


  • UL 9, UL 10B, UL 10C, UL 263
  • NFPA 80, NFPA 251, NFPA 252, NFPA 257
  • ASTM E119, ASTM E152, ASTM E163, ASTM E2074, ASTM E2010-01, ASTM C1629/C1629M, ASTM E695, ASTM D4977
  • CPSC 16 CFR 1201 Cat. II
  • ANSI Z97.1 
  • CAN/ULC S101, CAN/ULC S104, CAN/ULC S106
  • NFRC 100, NFRC 200, NFRC 500
GPX® Architectural Series Fire Resistive
GPX® Builders Series Fire Protective
GPX® EZ Frame
GPX® Blast System
GPX® Ballistic Series
GPX® Hurricane
GPX® Curtain Wall

Related Case Studies

Learn more about fire rated glass and framing through our case studies. We highlight innovative design applications in real-world settings and show how architects continue to push the boundaries of what fire rated glass and framing can do.

San Diego Highrise Uses Fire Rated Glass on South Facade

Because the Sapphire Towers' south facing elevation was in close proximity to the adjacent property, code regulations required the south façade to either be solid, which was contrary to the design, or to have openings with a minimum fire protection of 45 minutes. SAFTI FIRST® engineered a system that met the uniform design demands and performance requirements for the windows and balconies in all 32 floors in the south-facing elevation.

Tall Order at the Exploratorium

The newly opened Exploratorium has brought energy and excitement to the city's bustling waterfront. EHDD transformed the historic Pier 15, built in 1915, to a 330,000 square foot indoor and outdoor campus, being touted as the largest net-zero building in the city and potentially the largest net-zero museum in the world. SAFTI FIRST® supplied a total of 19 pairs of 45-minute steel doors 11 pairs on north side and 8 pairs on the south side using SuperLite II-XL 45 IGU in GPX Builders Series Fire Protective.

Fire Rated Switchable Glass Provides Privacy and Fire Protection at the University of Chicago Medical Center

The new 10-story “Center for Care and Discovery” building in the University of Chicago Medical Center’s campus is dubbed as the “hospital of the future” for its high-tech design and groundbreaking scientific work. At 1.2 million square feet, it is one of the largest buildings at the campus and has already transformed the skyline of Chicago’s south side.