Updated September 2026 with UK tint law and how we fit film in the studio.
Window tinting is a thin film applied to the inside of your car’s glass. It cuts heat, glare and UV, adds privacy, and it’s one of the quickest jobs we do at Auto Wrap Manchester. Here’s how it works and what’s legal in the UK.
What is window tint film?
Tint film is a polyester (PET) sheet, usually a fraction of a millimetre thick, with a scratch-resistant top coat and a pressure-sensitive adhesive on the back. What sits in the middle is what changes how the film performs.
- Dyed film uses a dye layer to absorb light. It gives the darkest look for the money but does the least against heat, and cheap dyed film can fade to purple.
- Metallised film has a fine metal layer that reflects heat, but it can interfere with phone, GPS and radio signals on some cars.
- Ceramic film uses ceramic particles to reject infrared heat without blocking signals. It costs more and it’s the best performer of the three.
How tint blocks heat, glare and UV
Sunlight arrives as visible light, infrared (the part you feel as heat) and ultraviolet. A darker film cuts more visible light, so less glare and more privacy. Infrared is absorbed or reflected by the metal or ceramic layer, which is why a light ceramic film can keep a cabin cooler than a dark dyed one.
UV is almost entirely blocked by the film itself, regardless of shade, which protects your skin and stops the dash and seats fading.
What does VLT mean?
VLT stands for visible light transmission. It’s the percentage of visible light that passes through the glass and film together, so a lower number means a darker window. A 5% film reads as near-black from outside; a 50% film is a subtle shade. VLT is measured on the finished window, not the film on its own.
UK window tint law
The rules apply to the front of the car, and they’re measured as VLT.
| Window | Minimum light through |
|---|---|
| Front windscreen | 75% |
| Front side windows (driver and passenger) | 70% |
| Rear side windows | No legal limit |
| Rear windscreen | No legal limit |
It’s illegal to sell or fit front tints darker than these limits, and driving with them can mean a prohibition notice, a penalty notice or court. That’s why we won’t fit dark film to the front windows. Anything behind the B-pillar is your call.
How we fit window tint
We fit film to the inside of the glass, and the whole job happens in our Trafford Park unit. The process goes like this.
- Clean and inspect. Every window is cleaned inside and out, because a single hair under the film shows up as a bubble. Please arrive with a clean car and take out child seats so we can reach every edge.
- Cut and shape. The film is cut to each window on the outside of the glass, then heat-shrunk so it follows the curve of the pane. Rear screens curve in two directions, so this is where experience matters.
- Wet application. The inside of the glass is sprayed with a slip solution, the film is floated into position, then squeegeed from the centre to the edges to push the water out.
- Curing. A light haze or small water pockets are normal at first. They clear as the moisture evaporates through the film, which takes around [ADAM: typical cure time]. Keep the windows up until then.
A full car usually leaves the same day.
Factory privacy glass is not the same as tint
Lots of cars come with dark rear glass from the factory. That’s pigment mixed into the glass when it was made, and it’s mainly about privacy. It blocks very little heat and offers no extra UV protection compared with a quality film.
Film is engineered to reject heat and UV, and you choose the shade. We often fit a ceramic film over factory privacy glass for that reason: the car doesn’t look much darker, but the cabin is noticeably cooler.
The tints we fit
We fit three main options, and we’ll show you samples against your own glass before you decide.
- Window tints in a range of shades for rear side windows and the rear screen, from a light smoke through to limo black.
- Chameleon window tints, a colour-shifting film that flashes blue and purple in the light while letting most visible light through. Depending on the film and your glass it can sit within the front-window limits, and we measure to confirm before fitting.
- Light tints for headlights and rear lights, in a smoked finish that tidies up the look of the car.
Rear tints are a common add-on on our colour-change wraps, and it’s easiest to do both while the car is already in the unit.
How much does window tinting cost?
Tinting is a much smaller job than a wrap, and the price depends on the number of windows, the size of the car and the film you choose. Our window tints start from [ADAM: tint price from £], and we’ll give you a fixed price when you get in touch.
Looking after your tints
Keep the windows up while the film cures, then clean the inside of the glass with a soft cloth and an ammonia-free cleaner. No scrapers or abrasive pads on the film side. Full guide: how to look after your window tints.
Window tinting FAQs
Is window tinting legal in the UK?
Yes, as long as the front windscreen lets at least 75% of light through and the front side windows at least 70%. There’s no legal limit on rear side windows or the rear windscreen.
How long does window tinting take?
Most cars are done within a day in our Trafford Park unit. The film then takes around [ADAM: typical cure time] to fully cure, so keep the windows up during that period.
Does window tint stop heat as well as light?
It depends on the film. Dyed film mainly cuts visible light. Metallised and ceramic films reject infrared heat too, so a lighter ceramic film can keep a car cooler than a darker dyed one.
Can I tint over factory privacy glass?
Yes. Factory glass is pigmented for privacy but does little against heat or UV, so adding a film improves both without changing the look much.
Can I wash the car straight after tinting?
You can wash the outside straight away because the film is on the inside of the glass. Leave the insides of the windows alone until the film has cured.
Book your window tints in Manchester
Auto Wrap Manchester has been tinting and wrapping cars in Trafford Park since 2014. See our full range of window tints, get a free quote or call us on 0161 672 7376.
