A glass facade lets infrared radiation through. HVAC works harder, but it does not remove the cause of overheating.
IzolGlass - Active TT film - datasheet Ver. 6 from 1 February 2026
The window stays. The parameters change.
Multi-layer 82 um PET film with a three-layer Active TT nano-coating. Applied to existing IGUs - without dismantling windows, without downtime and without losing interior brightness.
/ IzolGlass in one paragraph
IzolGlass is a multilayer PET film with an Active TT nano-coating, spectrally selective - applied to existing double-glazed units. It blocks infrared (IR) and ultraviolet (UV) radiation while transmitting visible light. For offices, hospitals, storefronts and heritage buildings where window replacement is impossible or not permitted. Two variants:
- Active TT South
- maximum IR blocking
- Active TT North
- maximum light transmission
/ Technical validation
- Peer-reviewed publication Springer JTAC 2024
- Technical datasheet Active TT Wer. 6
>94% IR blocking Datasheet Ver. 6
>99% UV blocking Datasheet Ver. 6
70-72% VLT - light transmission Datasheet Ver. 6
81% TSER at 60° angle Active TT South
0.000408 λ W/mK Journal of Thermal Analysis and Calorimetry 2024
NRO C-s1-d0 PN-EN 13501-1:2019-02
Problem
Glazing turns a building into a heat exchanger.
An IGU loses heat 4-6x faster than a wall of the same surface area.
Replacing joinery means PLN 2,000-4,000/m² and months of work. Film is applied to existing panes - 30-40 m²/day for a two-person crew.
/ Active TT variants
Two variants of Active TT - choice by window orientation
Selection by exposure, package type and glass-edge condition. Active TT datasheet Ver. 6 from 1 February 2026.
Active TT South
Maximum protection against overheating. S, SE and SW exposures. Vertical windows.
Order a window auditActive TT North
Universal, any solar exposure, priority on brightness and winter heat retention. Variant selection for skylights and roof windows - after a window audit.
Order a window auditThis is not a sun-control film.
Three things IzolGlass does not pretend to be.
It does not darken the interior as its main strategy.
VLT 70-72% means the window stays bright. The work happens in IR and UV, not by hiding daylight.
Active TT datasheet Ver. 6It does not replace a window audit.
Every installation starts with an assessment of the package type, edge condition, exposure and frames. On low-E glass, the correct route may be IzolGlass Panel.
Variant selection procedureIt is not a mirror film.
Active TT does not create a mirror effect from the inside or outside. The selection is based on spectral parameters and the glass package audit - Active TT works at the nano-coating level.
Datasheet Ver. 6/ Active TT mechanism
A three-layer nano-coating on PET film.
Light stays. Heat and UV are controlled in the coating layer.
1
/ 01
82 um PET film + Active TT
Multi-layer 82 um PET film with a three-layer Active TT nano-coating. Applied to existing IGUs - without dismantling windows, without downtime and without losing interior brightness.
Active TT datasheet Ver. 6 from 1 February 2026
2
/ 02
Visible light - passes through
VLT 70% (South), 72% (North) - the window stays bright. The coating works in the IR and UV bands, it does not dim daylight.
Active TT datasheet Ver. 6 from 1 February 2026
3
/ 03
Infrared - reflected
The heat carrier. Active TT South reflects above 94% of IR - in summer the facade does not overheat the interior and the HVAC works less. The North variant blocks above 60% at any exposure.
Active TT datasheet Ver. 6 from 1 February 2026
4
/ 04
Ultraviolet - blocked
Active TT blocks above 99% of UV. Furniture, fabrics and interior finishes do not fade, and the window stays bright.
Active TT datasheet Ver. 6 from 1 February 2026
-
/ 01 82 um PET film + Active TT
Multi-layer 82 um PET film with a three-layer Active TT nano-coating. Applied to existing IGUs - without dismantling windows, without downtime and without losing interior brightness.
Active TT datasheet Ver. 6 from 1 February 2026
-
/ 02 Visible light - passes through
VLT 70% (South), 72% (North) - the window stays bright. The coating works in the IR and UV bands, it does not dim daylight.
Active TT datasheet Ver. 6 from 1 February 2026
-
/ 03 Infrared - reflected
The heat carrier. Active TT South reflects above 94% of IR - in summer the facade does not overheat the interior and the HVAC works less. The North variant blocks above 60% at any exposure.
Active TT datasheet Ver. 6 from 1 February 2026
-
/ 04 Ultraviolet - blocked
Active TT blocks above 99% of UV. Furniture, fabrics and interior finishes do not fade, and the window stays bright.
Active TT datasheet Ver. 6 from 1 February 2026
Active TT datasheet Ver. 6 from 1 February 2026
/ Implementation
A glass facade without replacing IGUs.
Before HVAC works harder
PLN 2,000-4,000/m² joinery replacement
After 30-40 m²/day application
>94% IR Active TT South
Active TT variant cards.
Both variants use the same application process. They differ by spectral performance and exposure.
Active TT South
Maximum protection against overheating. S, SE and SW exposures. Vertical windows.
Active TT datasheet Ver. 6 from 1 February 2026
Technical parameters
- IR
- >94% Datasheet Ver. 6
- UV
- >99% Datasheet Ver. 6
- VLT
- 70% Datasheet Ver. 6
- TSER
- 81% 60° angle
- Exposure
- S, SE, SW
- Application
- Vertical windows
Active TT North
Universal, any solar exposure, priority on brightness and winter heat retention. Variant selection for skylights and roof windows - after a window audit.
Active TT datasheet Ver. 6 from 1 February 2026
Technical parameters
- IR
- >60% Datasheet Ver. 6
- UV
- >99% Datasheet Ver. 6
- VLT
- 72% Datasheet Ver. 6
- TSER
- 59% Datasheet Ver. 6
- Exposure
- Every solar exposure
- Application
- Universal, any solar exposure, priority on brightness and winter heat retention. Variant selection for skylights and roof windows - after a window audit.
/ Product documents
Documents and parameter sources.
DOI, datasheet Ver. 6, variant selection procedure and classifications used in projects.
ACTIVE TT ACTIVE TT Active TT (IzolGlass film)
Multi-layer 82 um PET film with a three-layer Active TT nano-coating. Applied to existing IGUs - without dismantling windows, without downtime and without losing interior brightness.
Active TT datasheet Ver. 6 from 1 February 2026
DOI DOI Journal of Thermal Analysis and Calorimetry (Springer Nature), 2024
Journal of Thermal Analysis and Calorimetry (Springer Nature) 2024 validates parameters of the previous transparent coating generation: λ 0.000408 W/mK, NIR 88.68%, UV 99.49%.
Journal of Thermal Analysis and Calorimetry, 2024 - https://doi.org/10.1007/s10973-024-13673-9
PZH PZH Adalio documents and approvals
Active TT film validation: Springer JTAC 2024 publication and datasheet Wer. 6 from 1 February 2026. Full set of PZH approvals, CE declarations, NRO fire classification and Adalio patents (for both product lines) - on the Certificates page.
Full documentation: /en/certifications
SELECTION SELECTION Variant selection procedure
Every installation starts with an assessment of the package type, edge condition, exposure and frames. On low-E glass, the correct route may be IzolGlass Panel.
Variant selection procedure
/ Peer-reviewed publication
It has a peer-reviewed publication. Journal of Thermal Analysis and Calorimetry 2024 confirms parameters of the previous transparent coating generation: λ 0.000408 W/mK, NIR 88.68%, UV 99.49%.
Journal of Thermal Analysis and Calorimetry DOI Datasheet Ver. 6
Open DOI Application in three steps.
Calm form, concrete process.
- / 01
Window audit and variant selection
Measurement of glass area, assessment of package, exposure and frames. Result: free thermal audit, variant selection, measurement, ROI scenario, schedule.
- / 02
Wet-method application
Film mounted on the exterior side of the glass. Two-person crew: approx. 30-40 m²/day. Application only above +5°C (datasheet Ver. 6 from 1 February 2026).
- / 03
Protocol and before/after measurement
Thermography, product specification card, batch numbers, 5-year warranty. During the first 30 days - no window cleaning and no chemicals while the adhesive cross-links.
/ Window audit
First variant selection. Then decision.
Measurement of glass area, assessment of package, exposure and frames. Result: free thermal audit, variant selection, measurement, ROI scenario and schedule.
Values are indicative. The audit gives concrete numbers for your building.
Next step
First measurement. Then decision.
B2B audit: thermography, building envelope assessment, variant selection, application scope, and an ROI scenario. We work with managers, engineers, and architects - whoever has to defend the decision.