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

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

Product Advantages

  • Maximum fire and impact safety with hose stream and full radiant heat protection.
  • Largest tested and approved sizes up to 4,876 in.² (3.15 m²) in standard 1-3/4 in. (45 mm) profile.
  • Tint-free and optically clear.  Perfect for property lines 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 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
120 MinutesWalls4,876 in.²
(3.15 m²)
124 in.
(3.15 m)
124 in.
(3.15 m)
5/8 in.
(16 mm)*

*SuperLite® II-XL is tested and approved with 5/8 in. stop heights.  However, 1 in. stop heights are recommended for optical irregularities that might occur along the perimeter of the lite.  See Quality and Construction Information for SAFTI FIRST® Fire Resistive Glass.

Product Specifications

Thickness 1-3/4 in. (45 mm) standard
2-3/8 in. (61 mm) when insulated with clear Low-E
Weight 16 lbs. / sq. ft. (79 kg/m²)
Fire Rating 120 minutes with hose stream
Impact Safety Rating CPSC 16 CFR 1201 Cat. I and II, ANSI Z97.1
Sound Rating in GPX Framing STC 44 standard profile
STC 44 when insulated with 1/4 in. Low-E
Visible Light Transmittance 0.77 with clear standard
0.878 with clear low-iron
Application Walls
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 40 standard profile
OITC 37 insulated with 1/4 in. Low-E

listings and standards

Listings and Standards

SuperLite® II-XL 120 is listed and labeled by Underwriters Laboratories and Intertek, nationally recognized testing laboratories approved by OSHA.


  • Intertek: 32841; 56534; 51170
  • UL: U536
  • CSFM: 1080:1660:0104
  • 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® 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 Resistive Curtain Wall at NYC Midtown Community Court

The 1890s-era Midtown Community Court in New York City—a New York Historic Landmark—is currently undergoing a five year, $18 million renovation that includes a 9,650-square-foot addition for a new elevator, lobby and stairwell featuring fire resistive glass and curtain wall. The system consists of SAFTI FIRST®’s SuperLite II-XL 120 IGU in GPX Curtain Wall System.

Utah Business School Features Dramatic Fire Rated Glass Wall

The David Eccles School of Business on the University of Utah campus features a 28- x 18-ft 2 hour interior glass wall with a 90 minute full-vision door in an exit enclosure/stairwell. The architects selected fire rated glass to meet fire rating requirements while providing maximum visibility and natural daylighting in the space. The project’s specifications also required the fire rated glass to have the same optical clarity as the adjacent non-rated glass systems.

Glass Curtain Wall Lets Light In and Keeps Fire Out

Prairie Hills Junior High School's south-facing elevation features a glazed aluminum curtain wall that incorporates PPG Solarblue and PPG Solarban 60 glazing. Parts of the curtain wall had to meet a two-hour rating because it was adjacent to a two-hour block wall through the building's interior. SAFTI FIRST supplied SuperLite II-XL 120 IGU in GPX Curtain Wall Framing in order to meet ASTM E-119/NFPA 251/UL263 requirements.

Fire Rated Glazing Helps Historic University Preserve its Past

The new Robert B. Aikens Commons at the University of Michigan Law School was built on an unused grassy courtyard between Hutchins Hall and the legal research building. The proximity of the new common area to historic Hutchins Hall posed a unique challenge. The building code required a 2 hour fire rated barrier between them. The architects specified SuperLite II-XL 120, a clear, fire resistive glazing product that meets the ASTM E-119 wall standard for up to 2 hours.

Utah Junior High Adds Fire Rated Glass to Corridors

AJC Architects of Salt Lake City, Utah looked to SAFTI FIRST® when it came time to renovate the media center and build a new counseling center for North Layton Junior High School. They realized they could take advantage of a clear fire-rated glazing to keep the look of the media center and provide an open, welcoming entrance to the new counseling center.

Medical Center Maximizes Natural Daylight with Fire Rated Glass

Central to the new UC Davis Medical Center Surgery and Emergency Services Pavilion's design was a large skylight that allows natural light to vertically flow into the atrium area and other light wells throughout the building. However, they also wanted to let light flow horizontally into the adjacent hallways, rooms, etc. Because the walls in the atrium and light wells have to meet a 2-hour rating, Stantec Architects approached SAFTI FIRST® for a solution. Large portions of the 2 hour atrium and light well walls were made “transparent” with the use of SuperLite II-XL 120 in GPX Framing.

Fire Resistive Curtain Wall at Aspen Art Museum

Designed by Pritzker prize winning architect Shigeru Ban, the brand new 33,000 sf Aspen Art Museum boasts large exterior glass walls designed to keep the visitors engaged with views of the beautiful Aspen landscape. SAFTI FIRST®’s engineering team provided design assistance and supplied a 2 hour fire resistive curtain wall with SuperLite II-XL 120 with Starphire Ultra-Clear Glass insulated with Viracon VE13-85 in GPX Curtain Wall Framing. A woven screen encloses the glass curtain wall to provide shading from direct sunlight.

Fire Rated Glass Helps SFPUC Building Achieve LEED Platinum

The new San Francisco Public Utilities Commission Headquarters combines maximum daylighting and fire safety with a multi-story, fire rated glass stairwell from SAFTI FIRST®. Dubbed as the "greenest building in North America," this Class A LEED Platinum office building features a transparent, 2-hour fire rated stairwell, situated prominently near the main entrance. SAFTI FIRST® supplied SuperLite II-XL 120 in GPX Architectural Series Wall Framing and SuperLite II-XL 90 in GPX Builders Series Temperature Rise Door starting from the lobby all the way to the topmost floor.

Porsche Design Tower Sets a New Standard of Cool with the Help of Fire Rated Glass

Perhaps no other residential high-rise has created more buzz than the highly-anticipated Porsche Design Tower in Sunny Isles, Florida. A collaboration between Dezer Development and the Porsche Design Group, the 60-story, 132-residence luxury tower designed by Sieger Suarez Architects promises to deliver a new standard of cool.

Fire Rated Glass Brings Whimsical and Reliable Protection at Children’s Hospital

One of the highlights of the SUNY University Hospital’s vertical expansion is the addition of the Golisano Children’s Hospital on the top two floors of the six-story addition. Since the project added new floors, stairwell enclosures were also added. Traditionally, stairwells are relegated to the back of the building, and are usually closed-off, dimly lit and seldom used. Today, stairwells are becoming a prominent design feature and their use is encouraged more and more for the health benefits that stair climbing provides.

Fire Resistive Blast and Ballistic Glass Walls in High Security Facilities

A building’s design is very much influenced by the function it performs and the perceived threats that it may face – whether it’s from natural disasters, accidents or terrorist attacks – with the latter being a foremost concern for federal courthouses, embassies, government facilities and other high profile buildings. Because of these security concerns, trade-offs have been made when it comes to daylighting, energy efficiency and aesthetics to name a few. The good news is that today, high-performance security glazing make-ups are available to meet the level of protection needed while continuing to provide natural light and a feeling of openness.

Fire Resistive Transparent Walls Transform Stairwells and Exits to Inviting, Light-filled Spaces

To preserve the building’s open design and to extend natural light further in the building, the architects incorporated fire resistive glazing in the areas that required a 2-hour fire rating, particularly in the stairwells and exit passageways at the new Kent State University College of Architecture and Environmental Design.

Army Hospital Features First-ever Fire Resistive, Blast Rated Curtain Wall that Meets DoD Antiterrorism Standards

The Department of Defense (DoD) published the Unified Facilities Criteria (UFC) 4-010-01 Antiterrorism Standards for Buildings as a mandatory guideline to mitigate the threats of terrorism against buildings and ensure the safety of the individuals that inhabit them. It applies to all newly constructed DoD Components, DoD inhabited buildings, billeting and high-occupancy housing, as well as already inhabited buildings where the renovation costs are 50% or more than the value of the building (for a complete list, please see UFC 4-010-01 section 1.8).

A Clear Solution for Harvard’s Klarman Hall

This new 120,000 square foot, state-of-the-art convening center features a 1,000-seat auditorium that is large enough to host the entire MBA class. The glass atrium floods the multi-purpose lobby with natural light, as well as provides a visual connection between the interior of the building and the outdoor environment. To maximize transparency, SAFTI FIRST met with the architects during the design phase to create a large, 2-hour, glass wall that separates the lobby from the auditorium while providing a visual connection between them. Since this 2-hour glass wall also serves as the entrance to the auditorium, deciding on a 90-minute door system was of upmost important. SAFTI FIRST’s in-house engineering department provided design assistance, system details, engineering calculations and support from the planning phase all the way to the submittal process.

Beautiful 2-Hour Glass Floor Brings Light and Protection to San Francisco’s Union Square Station

SAFTI FIRST® provided a unique, artistic 2-hour fire resistive glass floor to the new Union Square Station in San Francisco. This glass floor acts as a lightwell and designed to improve wayfinding by welcoming commuters into the concourse level while meeting all the fire rated code requirements. Because SAFTI FIRST®’s products are proudly USA-made, it met the Buy America requirements of the project as well.

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.