In Reply to: AM radio/window tint posted by Brian C. on August 27, 2001 at 09:02:41:
Economy window films are constructed of dyed or coated polyester and offer good UV and glare protection, but little heat rejection.
The next level of performance is scratch-resistance. These films offer the same benefits as economy films, but add an anti-scratch coating that keeps the film looking good longer.
The best heat rejection available comes from metallized films. Metallizing a film does not make it dark and shiny, but increases the active heat and rejection. The highest performing films available contain UV absorbers, as well as metal, to offer the maximum protection for both the vehicle and its passengers.
Now, that being said, the metal based films can interfere with AM radio reception. The dyed and scratch resistant films do not.
Hope this helps,