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Technical window films

Low‑E, anti‑fog, photoluminescent, electromagnetic shielding: specialist films for projects that go beyond standard solutions.

Some glazing has constraints that solar, decorative or security films don’t cover. Glass that fogs up constantly, a room that must block electromagnetic waves, a building losing heat through glazing in winter, or signage that must remain visible in the dark. Our technical films address these specific cases with dedicated solutions. These aren’t films you install everywhere — they’re films you specify when the need is clearly identified.

Single‑function films for precise problems

Anti‑fog film

Condensation on cold glazing is a recurring problem wherever there’s a significant temperature difference between the two sides of the glass. Refrigerated display cases, cold rooms, indoor pools, spas: fog forms on the glass and turns it opaque within minutes.

Anti‑fog film changes the surface behaviour of the glazing. Instead of forming opaque droplets that blur visibility, water spreads into a continuous, transparent layer that drains naturally. The glass stays clear at all times.

Photoluminescent film

Photoluminescent film absorbs ambient light during the day and releases it in the dark. In a power outage or during night-time evacuation, filmed glazing remains visible and easy to identify without any external power source.

It’s a passive signage solution used in buildings with fire-safety constraints. Glass doors, corridor partitions and emergency exits become luminous markers that guide occupants.

Other technical solutions

Low‑emissivity (Low‑E) film

In winter, standard glazing lets indoor heat escape outdoors through infrared radiation. Low‑E film reduces this effect by reflecting part of the infrared radiation back into the building.

The effect is comparable to upgraded insulating glazing, without replacing the existing glass. It’s the solution for older buildings with single glazing where replacement would be too costly or technically impossible.

Electromagnetic shielding film

Some rooms need protection against electromagnetic waves — either to prevent signals from leaving (data confidentiality) or to prevent external signals from disturbing sensitive equipment (labs, studios).

The film includes a conductive metallic layer that attenuates radio waves across a wide frequency range. Applied to the glazing, it complements wall shielding to create a protected enclosure.

Enhanced thermal insulation film

Beyond Low‑E, some films combine multiple thermal functions to maximise glazing insulation performance: solar rejection in summer, heat retention in winter, and reduced cold‑wall effect.

These high‑performance films are specified for commercial buildings subject to energy-efficiency targets, older buildings undergoing renovation, and projects aiming to improve ratings without replacing glazing.

Measured and documented performance

Each technical film is supplied with technical datasheets featuring laboratory-tested performance values. Thermal gains are measurable and documented with solar factor values, light transmission and U‑value.

These data allow thermal engineering offices to incorporate the film into energy performance calculations. These aren’t promises — they’re verifiable data.

Frequently asked questions

Are these films really effective, or are they niche products with no real results?
These are technical products whose effectiveness is measured and documented. Each reference comes with datasheets including laboratory-tested performance values. Anti‑fog film eliminates condensation in a verifiable way. Low‑E film measurably reduces heat loss. Electromagnetic film attenuates waves across quantified frequency bands. These aren’t claims — they’re data.
Does anti‑fog film require special maintenance?
The anti‑fog effect relies on a surface treatment that can degrade over time and with repeated cleaning. Gentle cleaning without abrasive products and without ammonia helps preserve the film’s properties. Service life typically ranges from 3 to 5 years depending on humidity exposure. Periodic replacement should be expected in the most demanding environments.
Does photoluminescent film work without natural light?
The film charges under both natural and artificial light. A corridor glazed panel lit by fluorescent lighting during office hours can charge sufficiently to emit light for several hours after lights go off. Intensity and duration depend on prior exposure time and light level. Datasheets indicate charge times and autonomy for each reference.
Does Low‑E film work on double glazing?
Yes. The film is applied on the interior side of the double glazing and improves thermal performance. The gain is more noticeable on older double glazing (e.g. 4/12/4) than on newer high-performance units. On single glazing, the gain is even greater. The film doesn’t replace high-performance glazing, but it brings older glazing closer to current standards.
Does electromagnetic shielding film block Wi‑Fi and phone signals?
Yes — that’s exactly its purpose. The film attenuates radio waves, including Wi‑Fi, Bluetooth, 4G/5G and phone signals. That’s an advantage in secure rooms and a drawback in standard workspaces. This film should only be installed where shielding is required, not in ordinary offices.
Can a technical film be combined with a decorative or solar film?
It depends on the references. Some combinations are compatible if the two films are applied on different faces of the glazing; others are not. Contact our technical team with the references and your glazing configuration: we’ll validate compatibility and recommend the proper installation scheme.
Are these films available in standard sizes?
Technical films are supplied in rolls and cut to the glazing dimensions by the installer. Certain references such as electromagnetic shielding film may require additional manufacturing lead times. Contact our sales team to confirm availability and lead times based on reference and quantity.
Do you need a specialist installer?
Anti‑fog, Low‑E and photoluminescent films follow the standard wet application protocol, and a professional installer can apply them without additional training. Electromagnetic shielding film requires particular care with overlap and electrical continuity between strips to ensure shielding effectiveness. For this type of project, technical support is recommended.
What are the delivery times?
Common references are stocked in our Bonneuil‑sur‑Marne warehouse and ship within 24–48 hours. Some specialist references may require additional lead time. Contact our sales team to confirm availability.