1. Dyed film
The oldest and cheapest technology. Pigment is dispersed into the adhesive layer or the polyester itself, absorbing visible light and a modest amount of solar energy.
Pros: lowest cost, no signal interference, good glare control, dark aesthetic. Cons: modest heat rejection (typically 30-45% TSER), and the dye oxidizes under sustained UV exposure — the familiar purple fade. Expect 5-7 years on a south or west elevation in Los Angeles. Best for: budget-driven glare and privacy projects on low-priority glass.
2. Metallized film
Microscopically thin metal layers — aluminum, nickel-chrome, or silver — are vacuum-deposited onto the polyester, reflecting solar energy before it enters the building.
Pros: strong heat rejection (45-65% TSER), excellent durability, long colour stability, often the best cost-per-percent of heat rejected. Cons: reflective exterior appearance that some HOAs and city design guidelines prohibit, and the conductive metal layer can attenuate cell, GPS and Wi-Fi signals. Best for: warehouses, west-facing commercial glass, and buildings where appearance rules allow a reflective look.
3. Ceramic film
Non-conductive ceramic particles replace the metal. They absorb and scatter infrared energy while passing a high proportion of visible light.
Pros: 50-65% TSER with a neutral, non-mirrored look, zero signal interference, very stable colour over 15-20 years. Cons: costs roughly 40-70% more than dyed film. Best for: residential glass where the homeowner wants heat relief without changing how the house looks from the street.
4. Nano-ceramic film
Ceramic technology engineered at the nanometre scale. Because the particles are smaller than the wavelength of visible light, they interfere with infrared far more than with the visible spectrum.
Pros: the highest infrared rejection available in a near-clear film — often 90%+ IR rejection at 70% visible light transmission. Cons: premium pricing, typically the top tier of any manufacturer's line. Best for: luxury homes, view-critical glass, and anywhere the client refuses to accept a darker room.
5. Spectrally selective film
A performance category rather than a separate material — usually a nano-ceramic or multilayer optical construction. The defining feature is a wide gap between visible light transmitted and total solar energy rejected.
Pros: keeps daylight and views while removing most of the heat load; the preferred specification for California Title 24 energy work and for LEED daylight credits. Cons: the most expensive per square foot. Best for: office towers, atriums, and any project where daylighting is a stated design goal.
6. Dual reflective film
A hybrid construction: reflective on the exterior-facing side, darker and low-reflectance on the interior side.
Pros: daytime privacy and heat rejection from outside, without the mirrored 'fishbowl' look from inside at night. Cons: still shows some exterior reflectance, so check HOA rules. Best for: high-rise residential, medical offices, and street-level suites needing privacy plus a normal indoor view.
7. Safety and security film
Thick polyester — typically 4, 7, 8, 11 or 14 mil — bonded with an aggressive adhesive whose job is to hold broken glass in the frame rather than to control heat.
Pros: delays forced entry, mitigates flying glass in seismic events and blasts, and can be combined with a solar layer. Cons: adds cost per square foot and often requires an attachment system to reach its rated performance. Best for: ground-floor retail, schools, government buildings, and any glazing near occupied seating.
8. Decorative and frosted film
Printed, etched, or diffused films that manage privacy and appearance rather than energy.
Pros: replaces the look of sandblasted or acid-etched glass at a fraction of the cost, fully reversible, can carry logos and gradients. Cons: little to no heat rejection. Best for: conference rooms, glass partitions, bathroom windows, and branded storefronts.
9. Smart film (PDLC)
Polymer dispersed liquid crystal film switches from opaque to clear when voltage is applied.
Pros: instant on-demand privacy, no blinds or curtains, works as a rear-projection surface. Cons: requires a permanent electrical supply and a professional laminating or retrofit process; costs an order of magnitude more than static film. Best for: executive offices, medical exam rooms, and high-end residential.
10. Anti-graffiti film
A clear sacrificial layer applied to glass, mirrors, or metal panels.
Pros: scratches, acid etch and paint damage the film, not the substrate; replacement costs a fraction of glass replacement. Cons: purely protective, no energy benefit. Best for: transit-adjacent storefronts, elevator interiors, restrooms, and any surface with a history of tagging.
Rough cost bands in the Los Angeles market
- Dyed solar film — lowest cost tier, shortest life
- Metallized solar film — mid tier, high performance per dollar
- Ceramic film — upper-mid tier, best all-round residential choice
- Nano-ceramic / spectrally selective — premium tier
- Safety and security film — priced by mil thickness plus attachment system
- Decorative and frosted — priced by coverage and print complexity
- Smart PDLC film — highest cost per square foot of any film type
Related reading and services
Frequently Asked Questions
Which type of window film blocks the most heat?
Highly reflective metallized films usually post the single highest total solar energy rejection numbers, but nano-ceramic and spectrally selective films come very close while staying visually clear. If appearance is unconstrained, metallized wins on raw numbers; if the view matters, nano-ceramic is the practical answer.
What is the difference between ceramic and nano-ceramic film?
Both use non-conductive ceramic particles. Nano-ceramic uses particles smaller than the wavelength of visible light, which lets the film reject far more infrared at the same visible light transmission — better clarity for the same heat performance, at a higher price.
Can different film types be used on different windows of the same building?
Yes, and it is common. A typical commercial job might use spectrally selective film on the view glass, safety film at street level, frosted film on conference rooms, and anti-graffiti film on the entry doors.
Which window film types interfere with cell signal?
Only films containing a continuous conductive metal layer — that is metallized and some dual reflective products. Dyed, ceramic, nano-ceramic, decorative, safety, and PDLC films are non-conductive and do not attenuate signals.
Does film type affect how long it lasts?
Significantly. Dyed films typically last 5-7 years before colour shift, metallized films 10-15 years, and ceramic and nano-ceramic films 15-20 years or more with residential lifetime warranties from the major manufacturers.
Get a free, no-pressure window film quote
Talk to a Window Tints Everything specialist about your project. We've installed window film across Los Angeles since 1994.