BA RF & Signal Blocking Film.
Window film that reduces radio-frequency signals passing through the glass.
Ordinary glass lets most radio signals through, while the walls around it reduce them. BA RF & Signal Blocking Film is applied to existing windows to reduce RF leakage through the glazing, without replacing the glass. It treats the windows: how well a whole room is shielded also depends on its walls, doors, openings and services.
Radio-frequency attenuation
The film manufacturer's published laboratory figures give 38 to 52 dB of attenuation between 100 kHz and 18 GHz, with the highest figure, 52 dB, between 1 and 3.5 GHz, the band used by 4G, 5G and 2.4 GHz Wi-Fi. The figures are stated as measured to the IEEE 299 method. Installed performance depends on the glass, the frame and how the film is bonded and grounded, so we confirm the expected result for each project.
Laser eavesdropping
The manufacturer states that a damping layer and infrared scattering reduce laser returns between 850 and 1550 nm by more than 99.8%. This makes listening through the glass with a laser much harder, and is best treated as one part of a wider counter-surveillance plan.
Daylight kept
Manufacturer data gives 55 to 70% visible light transmission, without a mirror finish.
Installed and grounded on site
The film is fitted to the inside face of existing glass and bonded to the window frame and the building earth with conductive tape, so the shielding is continuous across the glazing. Readings can be taken before and after installation to show the improvement on site.
Where blast protection is also needed
Where the same window also needs blast mitigation, combining RF film with a blast film and anchoring system can be reviewed for the project. We confirm the combined build-up and its supporting evidence before it is offered.
Where it is used
Network and security operations centres, meet-me rooms, secure government suites, and boardrooms.
BA RF & Signal Blocking Film.
Key figures, technical data and where it is used, on one A4 page.
- BA-Spec-48BA RF & Signal Blocking FilmPDF ↓
Confirm the complete configuration
Ratings, dimensions and options depend on the proposed system and its supporting documentation. Please confirm the complete configuration with our team before specification or ordering.
Have a project requirement?
Send your drawings, specification and project location. Tell us what the opening needs to achieve and where you need support.