SuperLite® II-XLB 120

120 Minute Fire Resistive Glazing for Oversized and Butt-Glazed Applications



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

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5 Year Warranty
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Starphire Ultra Clear
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Blast Rated

Product Advantages

  • Largest tested and approved clear view area of 7,980 in.² (5.15 m²) of any fire resistive glazing product up to 2 hours.
  • Tint-free, optically clear fire resistive glazing meeting ASTM E119, ANSI/UL 263 and CAN/ULC S101 with hose stream.
  • Butt-glazed option available.
  • Can be easily combined with GPX® Architectural Series Fire Resistive framing for a complete and code compliant fire resistive assembly.
  • Meets CPSC Cat. II impact safety, the federal maximum safety standard.
  • Available in custom architectural, decorative and energy-saving make-ups.
  • High STC ratings.
  • Intertek listed and labeled.
  • Standard 5 year limited warranty.
  • USA manufactured for fast lead times and competitive pricing.

maximum sizes

Fire RatingApplicationMax. CV AreaMax. CV WidthMax. CV HeightStops
120 MinutesWalls7,980 in.²
(5.15 m²)
133 in.
(3.38 m)
133 in.
(3.38 m)
5/8 in.
(16 mm)*

Product Specifications

Thickness 2-5/8 in. (66.7 mm)
Weight 23.4 lbs. / sq. ft. (114.25 kg/m²)
Fire Rating 120 minutes with hose stream
Impact Safety Rating CPSC 16 CFR 1201 Cat. I and II
Glass Make-up Fire resistive tempered glazing with intumescent interlayers
Application Walls

listings and standards

SuperLite® II-XLB 120 is listed and labeled by Intertek, a nationally recognized testing laboratory approved by OSHA.


  • Intertek: 37094
  • UL: U560
  • HPD: 29036


  • ASTM E119
  • ANSI/UL 263, ANSI Z97.1 
  • CAN/ULC S101
  • CPSC 16 CFR 1201 Cat. II 
GPX® Architectural Series Fire Resistive
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.

Fire Rated Glazing Helps Achieve Unobstructed, Floor-to-Ceiling Views in 2-Hour Atrium Wall

There is a growing trend in office space design that favors increased opportunities for connectivity and collaboration among its occupants. In buildings with multiple floors, this can be a challenge as the vertical separation between floors makes face-to-face encounters less likely to happen. One way to get around this is by incorporating an atrium. See how fire rated glass helped the designers meet the fire rated requirements for this atrium while providing clear, unobstructed views.

Fire Rated Glass Transforms Retail Parking Garage with Natural Light and Vision

Traditional parking garage designs used to have opaque fire rated building materials like concrete, masonry and drywall which made these spaces dark, cold and uninviting. That all changed, thanks to the emergence of new technology, clear, fire resistive glazing tested to ULC/CAN S101 up to 2 hours that are available in large sizes and low-iron glass make-ups with high visible light transmission for superior clarity and color neutrality.

Chicago Starbucks Reserve Turns Stair-Climbing Into Unforgettable Experience Using Fire Rated Glass

The Starbucks Reserve Roastery in Chicago features an incredible, 4-story mural by local artist Eulojio Ortega. The mural, brilliant for conveying the story as visitors go from floor to floor, is interestingly located in an exit stairwell.  Traditionally, stairwells are enclosed in opaque walls, leaving them dark, isolated, and rarely utilized unless in an emergency.  To allow the mural to be visible through multiple floors, encourage stair usage and meet fire rated code requirements, the architects redesigned the 2- hour stairwell using transparent, floor-to-ceiling butt-glazed glass walls with the largest tested and listed fire resistive glass panels available.

The Miracle of 520 West 20th Street

The architects at Morris Adjmi wanted large, 11-ft. tall glass walls to highlight the breathtaking views for the reimagined Warehouse in New York City’s growing architectural wonderland of Chelsea. However, the building was on a lot line, mandating 2 hour fire walls. SAFTI FIRST® made this dream a reality by supplying the largest tested and listed 2 hour fire resistive glazing available today. The inclusion of low-iron glass in the fire-resistive glazing units ensured superior clarity and aesthetic continuity with the adjacent non-rated windows. The fire resistive units incorporated high performance glazing and were filled with argon for energy efficiency and occupant comfort.

A Clear Solution for One Vanderbilt

Sophisticated. Elegant. Iconic. These are some of the words being used to describe One Vanderbilt Avenue, the 77-story skyscraper that has redefined the Manhattan skyline. At 1,401 feet tall, it is the tallest office tower in Midtown, with a prime location just steps from another world-famous architectural icon, Grand Central Terminal. SAFTI FIRST® provided clear, USA-made, fire resistive, low-iron glass and framing systems to this monumental project.