Anti Eavesdropping Film - Protection against wifi theft and eavesdropping

Anti Eavesdropping Film

(RF Attenuation Film)

Signal Defence window films provide radio frequency (RF) and Infrared (IR) attenuation with high visible light transmittance and low reflectivity – resulting in minimal aesthetic impact.

These Government and military grade protective films give high attenuation levels to glazed areas assisting in areas, which require conversion to Sensitive Compartmented Information Facilities (SCIF) standards.


Full Spectrum Window Protection

  • Protection against IR attack (laser microphones)
  • Shielding against WiFi and Bluetooth signalling through glass
  • “In Building” RF cleansing to allow direct connectivity to WLAN
  • Blast Protection


Key Benefits:

  • Anti-Eavesdropping and Technical Surveillance Counter Measure (TSCM) security
  • High Visible Light Transmission
  • Added security for wireless technologies including wireless local area network (WLAN)
  • Anti-Shatter Properties
  • Reduced Solar Gain for potential energy savings and ROI


Technical Specification:

  • Ultraviolet Transmission (<380nm)= <1%
  • Infrared Transmission (800-2500nm)= – <1%
  • RF (30Mz-6Gz)= Avg 40dB
  • Visible Light Transmission (400-780nm)= >53%
  • Visible Light Reflectance = 13%
  • Total Solar Energy Reflected = 70%

(Provision of full technical info requires NDA)



SD 2500 – attenuates (shields) to >40dB

SD 1000 – attenuates to >33dB

Tested to IEEE 299 standards and ASTM F3057



If you are looking for counter surveillance measures to protect against wifi theft and corporate espionage, speak to one of our technical representatives on 0333 800 2400 or email


Whether you require a quotation, samples, or simply advice, fill in the form to the right and a member of our team will contact you as soon as possible.

If your enquiry is urgent, we recommend you call us on 0333 800 2400. Our offices are open weekdays from 9am - 5pm. Our experienced staff will be delighted to assist you. 0333 800 2400


Head Office

Unit 1, Wetheral Close

Off Coupland Road

Hindley Green



Manchester Office

83 Ducie Street


M1 2JQ

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