PYRAN® Platinum

At a glance

PYRAN® Platinum fire-protection-rated glazing material is made from a transparent glass-ceramic with thickness of 3/16” (5 mm). It is intended for use in non-impact, non-safety-rated locations such as transoms and windows with fire-rating requirements up to 90 minutes.


  • World’s first and only floated glass-ceramic developed specifically for architectural applications
  • Largest UL-tested sheet size available in the industry at 51" x 99"


  • Fire-rated for up to 90 minutes with required hose-stream test
  • Passes positive pressure test standard UL 10C
  • Withstands thermal shock


  • Clear and colorless without the distracting amber tint associated with competitive glass-ceramics
  • Microfloat process allows for smooth surface and distortion-free mirror finish
  • Transparent and wireless

Environmental Friendly

  • Produced without hazardous heavy metals antimony and arsenic


  • Can be used to construct insulated glazing units
  • Can be lightly sandblasted or delivered with surface-applied opacity film, without affecting fire-rating
  • Approved for use with any standard fire-rated frame with the same rating

General Characteristics

  • Thickness: 3/16" (5 mm)
  • Weight: 2.6 lbs/ft²
  • Appearance: Clear; No amber tint
  • Surface finish: Float glass quality
  • Maximum sheet sizes: 51" x 99"
  • Impact rating: None (For applications requiring an impact-rated material SCHOTT offers PYRAN® Platinum F and PYRAN® Platinum L products)

Technical data

Rating (Minutes) Application Max. exposed area of glazing in2. (m2) Max. width of exposed glazing in. (mm) Max. height of exposed glazing in. (mm) Min. depth of grove in. (mm) Groove width in. Building Code Marking Impact safety-rated
Up to 90 min Other than doors 4933" (3.194) 98 1/4"  (2495) 98 1/4"  (2495) 5/8" (16) 7/16", 3/8" OH-90 No
Classified and labeled by Underwriters Laboratories, Inc.® and Underwriters Laboratories of Canada. Test report number for labeled fire-rated assemblies is UL File No. R22036. All above tests performed in accordance with UL 9, UL 10B, UL 10C, UBC 7-2 (1997), UBC 7-4 (1997), NFPA 257, NFPA 80, ASTM E2010-01, ASTM E2074-00, ULCCAN4 S-104 and ULCCAN4 S-106.

This product is not considered a barrier to radiant heat and has not met the ASTM E-119 or UL 263 test standards. All listing information is subject to change. The current listing can be accessed in the UL directory under File #R22036 or upon request from SCHOTT.
Fire-rated glass plays an important role in saving lives and minimizing property damage by providing safe egress and compartmentalizing smoke and flames. Knowing the standards, testing and code requirements are important in order to properly specify the correct and code-approved product for the application.
PYRAN Platinum - Fire-rated glass-ceramic - Fire

Fire-Endurace test

The Fire Endurance test subjects a full-size window or door assembly to a controlled time-temperature profile in a furnace. The test duration is 20 minutes up to three hours, depending on the desired rating, with temperatures reaching nearly 2000 °F in three hours. The window assembly including frame, glazing and components must not allow flames on the non-fire side, and the glazing must survive the test without breaking or cracking.
PYRAN Platinum - Fire-rated glass-ceramic - Firefighter

Hose-Stream test

Immediately following the Fire Endurance test, the fire-exposed side of the test assembly is subject to impact from water blast in a prescribed pattern for duration appropriate to the specimen size. The glazing must remain intact in the frame.


After cutting, each lite of PYRAN® Platinum fire-rated glass-ceramic shall be permanently labeled according to local building code requirements with product and manufacturer’s name, UL certification mark, fire rating, etc.

Storage & Handling

PYRAN® Platinum fire-rated glass-ceramic should be handled with care during transportation, storage, inspection, and installation. It should be stored in dry conditions and needs to be stacked upright or at a slight angle. In addition, the panels must be separated by an appropriate material, such as soft pads made of cork and the bottom edge must be supported along its entire length.


PYRAN® Platinum shall only be installed into fire-rated frame and window assemblies carrying the same rating. Each PYRAN® Platinum panel should be inspected carefully before installation, and any pieces with visible edge or surface damage should be sorted out. All glazing components and the stop height must be chosen according to the PYRAN® Platinum UL classification. The panel must be placed on calcium silicate or hardwood setting blocks and glazed using PYRAN® Platinum classified glazing tape, such as closed cell PVC, Fiberfrax tape or Pemko FG3000S90. The installation of the framed unit must comply with the frame supplier's instructions.

Each PYRAN® Platinum panel should be inspected carefully before installation and any pieces with visible edge or surface damage should be sorted out. PYRAN® Platinum is a specially developed glass-ceramic, that fulfills the fire protection rating requirements. The production process may create certain optical imperfections, such as bubbles or knots. Since these do not generally impair the transparency or the technical performance of the glass-ceramic, they do not represent cause for rejection or replacement.

Maintenance & Care

To maintain the aesthetics, it is important to keep the panel clean. A soft, clean, non-abrasive cloth and a mild soap, detergent, or non-abrasive window cleaning solution is suitable for cleaning. After cleaning, rinse immediately with clean water and remove any excess water from the panel surface. Also, do not allow any metal or hard parts of the cleaning equipment to come in contact with the panel surface.


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