The two leading vehicle window tints in North America are 3M and LLumar.
3M costs more than LLumar. Many shops provide both.
The number one brand of Ceramic is apparently Huper Optik (German), followed by FormulaOne’s Pinnacle, LLumar’s Axcess, Johnson Insulatir and Solar Gard Ultra Performance.
Interesting to note that "20%" tint doesn't exactly corresond to the amount of light filtered. Each manufacturer will differ.
Automotive Film3M™ Color Stable
While most other window film companies buy their polyester from someone else, 3M makes its own polyester in Decatur, Alabama. During this process, 3M patented a technology for producing its own nano-carbon polyester. This revolutionary and unique process, allows for maximum heat rejection without metals, which can interfere with radio and/or satellite signals. It also gives our films a beautiful neutral black look with unpararell color stability. Never before has anyone done this. In fact, it's so advanced that in time-based tests, 3M Color-Stable Auto Film held its color while most conventional dyed films rapidly changed to a purple color. No purple windows. Guaranteed!
We stand behind our work. Color-Stable films are backed by a limited lifetime warranty, which includes color stability.
Color Stable CS 5
Our darkest Color-Stable film designed primarily for the automotive market where a very low visible light transmission film is desired and allowed by state law. CS-5 allows 8% of visible light through the glass. It rejects heat, reduces glare and retards interior fading. It is used extensively on the passenger compartments of limos, vans, buses and other forms of mass transportation.
Color Stable CS 20
Dark Color-Stable film is designed primarily for the automotive market where a lower visible light transmission film is desirable and allowed by state law. CS-20 allows 16% of visible light through the glass. It rejects heat, reduces glare and retards interior fading.
Color Stable CS 35
Medium Color-Stable film is the standard in the automotive market. In many states, legislation regulating vehicle tinting has been written around this product. Therefore, becoming one of the most popular films in the line, CS-35 allows 38% of visible light through the glass. It rejects heat, reduces glare and retards interior fading.
Color Stable CS 50
Light Color-Stable film is designed primarily for the automotive market where a high visible light transmission film is desirable and allowed by state law. CS-50 allows 51% of visible light through the glass. It rejects heat, reduces glare and retards interior fading.