Superior Insulating Performance. Remarkably Clear.
Sungate ThermL™ glass is a low-e coating engineered for use on the interior surface of a typical one-inch insulating glass unit (IGU) that dramatically improves U-values when paired with a Solarban® solar control low-e glass by Vitro on the second surface.
Sungate ThermL™ glass is neutral, colorless and provides low reflectivity, so it looks just like uncoated clear glass while offering enhanced durability and insulation. Sungate ThermL™ glass is engineered to allow for a high rate of visible light transmittance (VLT) and to retain the indoor heated air by slowing down heat transfer through the IGU to reduce winter heating costs.
Sungate ThermL™ coatings are as durable and resistant to mechanical abrasion as uncoated glass.
When Sungate ThermL™ glass is paired in a one-inch IGU with a half-inch airspace with argon and Solarban® 70 glass on the second surface, the U-value is 0.19, which is a 21% improvement over using Solarban® 70 glass alone. This pairing provides a VLT of 63% and a solar heat gain coefficient (SHGC) of 0.27.
In a one-inch IGU with a half-inch airspace with argon, Solarban® 60 glass on the second surface and Sungate ThermL™ glass on the fourth surface provides a U-value of 0.20, which is a 20% improvement over using Solarban® 60 glass alone on the second surface. The pairing also delivers a VLT of 69%, and a SHGC of 0.38.
Sungate ThermL™ glass is ideal wherever increased insulation performance is needed and can even be used in a triple IGU for even greater insulating value. Wherever it is used, Sungate ThermL™ also allows visible light to pass through for exceptional daylighting while delivering remarkably low interior and exterior reflectance.
Sungate ThermL™ glass is available exclusively from Vitro Authorized® and Vitro Certified® fabricators. Sungate ThermL™ glass is also available in oversized standard sizes of 130-by-204 inches, as well as our Titan glass products that allow for sizes up to 130-by-240 inches.
Performance Data Comparisons Back to Top
| Outboard (6mm) |
Inboard (6mm) |
VLT |
Exterior Reflectance |
Interior Reflectance |
U-Value (Air) |
U-Value (Argon) |
SHGC |
LSG |
| Solarban® 60 (2) Clear |
Vitro Clear |
70% |
11% |
12% |
0.29 |
0.24 |
0.39 |
1.79 |
| Sungate ThermL™ (4) Clear |
69% |
10% |
11% |
0.23 |
0.20 |
0.38 |
1.82 |
| Solarban® 70 (2) Clear |
Vitro Clear |
64% |
13% |
14% |
0.28 |
0.24 |
0.27 |
2.37 |
| Sungate ThermL™ (4) Clear |
63% |
13% |
13% |
0.23 |
0.19 |
0.27 |
2.33 |
