Solar Gard listed a Sentinel Plus QXN 40 product update on its UK news page on April 28, 2026. The associated technical sheet positions the film as a new addition to the QXN range, using sputtered functional layers to combine solar control with relatively low visible reflection.
The sheet presents separate results for single, double and triple glazing. That matters when comparing quotations: a figure from one film-and-glass combination cannot simply be assigned to a different window.
Solar Gard says the reported centre-of-glass results were generated using EN 410 methodology and LBNL Window 7.6 software. They are not whole-building energy savings. The company’s broad glass-compatibility language also does not establish suitability for every installed glazing assembly. This report documents the UK update and published specifications, without independent product testing.
Sources & reporting notes
- UK news index: QXN 40 update Solar Gard · Source dated April 28, 2026Regional index date; Swedish regional index has a different date.
- Sentinel Plus QXN 40 sample and performance sheet Solar GardSheet code 03/26; not treated as a launch date.
This article is an original, AI-assisted summary of the sources above. It does not claim firsthand reporting or independent product testing. Our editorial standards · Corrections policy