I continually get asked about RF absorbing materials... To either protect our signals from going out, or keep others from coming in. Recently I researched a product from Paragon Glass. It is called Signal Defense Glass- it is DoD tested, here are it's specs :<br><br>Signals Defenses Technology is a patented, optically clear, Radio Frequency (RF), Infrared (IR) and Ultraviolet (UV) blocking window film, glass or polycarbonate (PC). Deploying SD Technology to fenestrations will provide privacy/eavesdropping protection, additional security for wireless networks/devices, RF sheltering for equipment and humans with very HIGH solar energy/UV blocking.<br>The SD2500 Film provides the HIGHEST levels of RF and IR attenuation, meets and exceeds the requirements of various US Government organizations’ specifications for optically clear RF/IR/UV<br>attenuating film/optical coatings, especially with respect to IR, and is listed by DoD as an RF/IR Attenuation<br>film tested to be “beneficial” as Alternative Shielding including TEMPEST Countermeasures.<br>KEY PRODUCT FEATURES:<br><br>· ULTRAVIOLET TRANSMISSION (<380NM) <1%<br>· INFRARED RAY TRANSMISSION (800-1500NM) <1%<br>· RF (30MZ-6+GHZ) >46 DB<br>· THICKNESS (SD2500) >.002 IN<br>· VISIBLE LIGHT TRANSMISSION (400 – 780NM) >53%<br>· VISIBLE LIGHT REFLECTANCE 13%<br>· TOTAL SOLAR ENERGY REJECTED 70%<br>· SHADING COEFFICIENT .35<br>· SOLAR HEAT GAIN COEFFICIENT .30<br><br><br>There are many applications for it and wanted to just share it with the community. The laminate is in the glass so anyone going through a re- model should consider it as an option for corporate security.<br><br>You can find paragon glass on the web.