Window film technology
Silver-Sputtered Film
Silver-sputtered film deposits an extremely thin silver layer to reflect infrared with very high efficiency; it is signal-attenuating but delivers some of the highest heat rejection numbers.
Silver is one of the most efficient reflectors of infrared radiation, which is why it is used in low-e architectural coatings and high-end sputtered films. A few atoms of silver, sandwiched between dielectric layers, can reject 70%+ of near-infrared.
In automotive applications silver-sputtered films have largely been displaced by nano-ceramic and multi-layer optical because of the signal attenuation issue. In architectural double-glazing, however, silver low-e remains the standard.
For Singapore drivers, silver-sputtered films are best avoided due to ERP and GPS interference risk. We mention them for completeness in industry literature.