3M FX-ST 20 Car Tint in Dubai
Mid-dark FX-ST shade balancing privacy, glare reduction and everyday outward visibility.
Quick answers
FX-ST 20 in Four Numbers
The published figures for FX-ST 20, and what each one means for your car.
Visible light
20%
Dark, private glass that still lets you see out at night better than FX-ST 5.
Glare cut
74%
Strong daytime glare reduction for rear passengers.
Infrared rejected
8%
Infrared stays flat across FX-ST. The shade adds privacy, not infrared control.
Legal on a private car?
No
Below the 50 percent limit for a private car’s side and rear glass, so it needs an approved exemption.
3M FX Standard Series data on Auto 75 factory-tinted glass. Full figures, including 6 mm clear glass, are on this page.
3M FX-ST 20 is a mid-dark shade within the 3M FX-ST window film range. Compared with FX-ST 5, it allows more visible light into the cabin while still providing a darker appearance, meaningful privacy and daytime glare reduction.
Compare the darker FX-ST 5 or the lighter FX-ST 35 and FX-ST 50. For a wider technology comparison, return to automotive window tinting.
3M FX-ST 20 Specifications at a Glance
3M reference data on Auto 75 glass: FX-ST 20 is listed at 20% VLT, 99% UV blocking, 57% TSER, 74% glare reduction, 8% IRR and 53% IRER.
3M reference data on 6 mm clear glass: FX-ST 20 is listed at 23% VLT, 99% UV blocking, 40% TSER, 74% glare reduction, 8% IRR and 23% IRER.
Shade position: FX-ST 20 is darker than FX-ST 35 and 50, so it gives more privacy and visible-light reduction while preserving more outward visibility than FX-ST 5. The two TSER values reflect different 3M reference glass systems and should not be treated as interchangeable.
Compare the darker FX-ST 5, the lighter FX-ST 35 and FX-ST 50, or return to the FX-ST range.
Appearance, reflectivity and signal behaviour
3M FX-ST 20 is a dark dyed car window film. On Auto 75 factory-tinted glass 3M lists it at 20 percent visible light, 57 percent total solar energy rejected, 74 percent glare reduction and 99 percent UV blocking, with 8 percent infrared rejection in the 900 to 1,000 nm band. It gives strong privacy with better night visibility than FX-ST 5, but on a private car in Dubai it is below the 50 percent limit for side and rear glass, so it needs an approved exemption.
3M FX-ST 20 is dyed polyester with a non-metallised construction. Non-metallised film keeps exterior reflectivity low, so from outside the glass reads as dark rather than mirrored, and it carries none of the signal-interference concern associated with metal-containing films. GPS, mobile data and 5G are unaffected. If low exterior reflectivity matters for the look of the car, this is the attribute to compare, not the shade number.
What the law allows in Dubai
The UAE permits up to 50 percent tint on the side and rear windows of a private vehicle, and the front windscreen must stay clear unless an exemption has been approved. At a nominal 20 percent visible light transmission, FX-ST 20 sits below the permitted limit, so on a private car it needs an approved exemption for any side or rear window. The reading is taken on the finished window, which is the film plus the glass already fitted to the car, so a nominal shade number does not by itself prove compliance. Have the installed glass measured before you commit. See car window tint law in Dubai for the limit, the fine and how exemptions work.
Warranty and documentation
3M warranty terms vary by market, film version, installer and documentation. Before installation, confirm the exact film series and shade being fitted, the written warranty term that applies to it, and what that term covers. Keep the invoice and the product documentation supplied with the job. Clear product identification and a proper invoice are stronger trust signals than a general performance claim.
What it costs
Price is driven by the film series, how many glass panels are covered, the shape of the glass, whether old film has to be removed first, and the warranty attached. See what car window tinting costs in Dubai, and car tint removal if the vehicle already has film on it.
Compare the options
FX-ST 20 Against Its Neighbours and Heat Films
Where FX-ST 20 sits in the range, and what a heat-first film changes at a similar shade.
DarkFX-ST 20
- Visible light
- 20%
- TSER
- 57%
- UV blocked
- 99%
Glare reduction74%
The balance of privacy and night visibility in the FX-ST range.
DarkerFX-ST 5
- Visible light
- 4%
- TSER
- 61%
- UV blocked
- 99%
Glare reduction95%
Maximum privacy, harder to see out at night.
LighterFX-ST 35
- Visible light
- 28%
- TSER
- 54%
- UV blocked
- 99%
Glare reduction63%
More light in the cabin, less privacy.
Heat-first alternativeCeramic IR 25
- Visible light
- 25%
- TSER
- 61%
- Glare cut
- 65%
Infrared rejection90%
A similar shade with 90 percent infrared rejection.
FX-ST figures from the 3M FX Standard Series data; heat-film figures from the 3M Ceramic IR and Crystalline Series data, all on Auto 75 glass. See the tint law in Dubai page for private car limits.
Before you choose
Three FX-ST 20 Myths
Three assumptions drivers make about dark dyed film.
Myth
FX-ST 20 reads 20 percent on every car
Fact
On Auto 75 glass it reads 20 percent; on 6 mm clear glass 3M lists 23 percent. The finished window is measured after fitting.
Myth
Darker FX-ST blocks more heat
Fact
Infrared rejection is 8 percent on FX-ST 20 and 7 to 8 percent across the range. Darkness buys privacy and glare control.
Myth
FX-ST 20 affects phone signal
Fact
FX-ST is non-metallised, so GPS, phone and keyless signals work normally.
Want privacy on the rear glass?
Tell us the car. We will compare FX-ST 20 with a heat-first film and fit a legal shade in front.
Frequently Asked Questions About 3M FX-ST 20
Is 3M FX-ST 20 legal for front side windows in Dubai?
The UAE permits up to 50 percent tint on the side and rear windows of a private vehicle, and the reading is taken on the finished window rather than on the film alone. At a nominal 20 percent visible light transmission, FX-ST 20 sits below that limit, so on a private car it needs an approved exemption for any side or rear window. Have the installed glass measured before you commit to a shade.
How much heat does 3M FX-ST 20 reject?
In 3M reference data, FX-ST 20 is listed at 57 percent TSER on Auto 75 automotive glass and 40 percent TSER on 6 mm clear glass. The two figures differ because the glass underneath the film is part of the result, so compare the total solar energy rejected figure for your own glazing rather than the shade number.
Is FX-ST 20 darker than FX-ST 35?
Yes. FX-ST 20 is darker than FX-ST 35 and FX-ST 50 and lighter than FX-ST 5. Within the FX-ST range the shades differ in darkness rather than in construction, so a darker shade gives more privacy and glare reduction but does not automatically reject more heat.
Will 3M FX-ST 20 affect GPS or mobile signal?
No. FX-ST is a non-metallized dyed-polyester construction, so it does not carry the signal interference concern associated with metallized films.
What should I expect while FX-ST 20 is curing?
Some haze or moisture appearance is normal while the installation solution dries. Curing time varies with the glass, temperature and conditions. Follow the aftercare instructions and return for inspection if bubbles, peeling or edge lift remain after the stated period.