Solar controller COOL-LITE® XTREME 51/23

Product description
COOL-LITE® XTREME 51/23 and COOL-LITE® XTREME 51/23 II (respectively the annealed and to-be-tempered versions) are triple-silver solar control glasses combining high visible light transmission with a low solar factor for excellent selectivity. They provide 51% visible transmission and a 23% solar factor, delivering a neutral appearance with low reflection suitable for modern glazed facades. This range supersedes COOL-LITE® XTREME 50/22 II and introduces an annealed option alongside the to-be-tempered version.

Benefits & applications

• High selectivity: maximises daylight while reducing solar heat gain, supporting lower HVAC loads and operating costs.
• Neutral visual aspect with minimal reflection: appropriate for large glazed façades and contemporary architectural projects.
• Available in annealed and to-be-tempered versions with comparable appearance and performance — adaptable to diverse glazing strategies.
• Can be combined with ORAÉ® low‑carbon substrates to reduce embodied carbon while maintaining operational energy savings.
• Typical applications:
  • Offices
  • Healthcare facilities
  • Educational buildings
  • Commercial and premium building markets (large façades, overhead glazing)

Appearance
COOL-LITE® XTREME 51/23 (II) exhibits colour neutrality across viewing angles, low surface reflection and a discreet aesthetic that integrates into modern architecture. It is suitable for bright indoor environments year-round and for hot climates where reduced external shading is desired; it can also be appropriate for selected historic renovation projects where shading removal is required.

Certifications & environmental

• Verified Environmental Product Declaration (EPD).
• Cradle to Cradle Bronze certified.

Technical information
RANGE: Substrates available: PLANICLEAR® (clear), DIAMANT® (extra clear), ORAÉ® (low‑carbon).
THICKNESS: 3 mm to 12 mm.
SIZE: Standard jumbo 3.21 x 6.00 m; overlengths up to 18 m. Standard stock sizes available.
PROCESSING:

• ANNEALED: available in annealed version.
• HEAT-TREATMENT: available in to‑be‑tempered version (suffix II). Supplied with EASYPRO® temporary surface protection. Tempering is required to achieve final performance and aesthetics; compatible with Heat Soak Test.
• EDGE DELETION: coating edge deletion is compulsory before assembly.
• INSULATED GLAZING UNIT (IGU): coating must be positioned on face 2 (inside the IGU).
• LAMINATION: possible if the coating is placed outside the laminate (coating on face 4).
• ENAMELING: no general approval for enameling of silver-based high-performance coatings.

Performance

• Visible light transmission (Tvis): 51%.
• Solar factor (g): 23%.
• Selectivity (Tvis / g): > 2.2.

Availability & scope
Available worldwide for commercial and premium building markets where high daylight and low solar factor are required, especially large glazed façades and overhead glazing.

Technical specifications

• Model: COOL-LITE® XTREME 51/23 (II)
• Substrates: PLANICLEAR®, DIAMANT®, ORAÉ® (low‑carbon)
• Thickness: 3–12 mm
• Standard jumbo size: 3.21 x 6.00 m; overlength up to 18 m
• Visible light transmission: 51%
• Solar factor: 23%
• Selectivity: > 2.2
• Versions: annealed and to‑be‑tempered (suffix II)
• Surface protection: supplied with EASYPRO® temporary protection
• IGU assembly: coating on face 2 (mandatory)
• Edge deletion: compulsory before assembly
• Lamination: coating must be outside laminate (face 4)
• Heat soak compatibility: yes (when tempered)
• Environmental: Verified EPD; Cradle to Cradle Bronze
• Availability: worldwide