Windows tinting know how

Window tinting – ‘Clean’ installation of window film – Know-how

I understand that people worry about their cars when they drop them off for window tinting, and I’m not surprised.

The reason is that customers don’t know how the fitting process works. Therefore they ask a lot of questions every day. So I’ve decided to answer some of them in this short article. I’ll try to show you that when you leave your car at our workshop, you don’t have anything to worry about.

I can’t say all fitters do it exactly the same way, but I’ll explain you how we do it here at STICK IT.


First: the tint always goes inside the window, but we prepare it (cut it) outside. This applies to all windows. We only use an extremely sharp blade specifically designed for this job, which means we don’t use strong pressure to cut the film. Thanks to this, we won’t scratch the exterior glass.


Once we have cut our film to size and shrunk it (rear window), it’s time to prepare the glass for film installation.

We remove all stickers from the inside. We use a small scraper only on windows without defroster grids – usually side windows.

We use non-acidic and non-abrasive solutions to remove all residues from the glass. We can’t really damage heating lines by doing it this way. The only thing we have observed, over years of experience, is that we have to be extra-careful when removing stickers from back windows (usually left there by motor traders) if they have been in place for a very long time (5 years or more). In these cases, the glass usually has to be preheated to avoid damaging the defroster grid. This is not a problem in 99% of cases.

We always cover the upholstery to protect it from dirt, stains, or moisture when we use a cleaning solution inside the car.


Usually we don’t remove door trim, but we nearly always have to take out the top rubber located between the door trim and the glass. To do this, we sometimes have to take out a few screws to loosen the trim. In some cases (maybe one out of ten) where we can’t remove the seal, we remove the door trim. After 8 years of experience with this, we know our job and we won’t damage the clips or door trim in any way.

As for band rear window trim – usually we don’t touch these, because there’s plenty of space there to tint the window. In some cases where they are easy to disassemble, we do it ‒ for example, in a Passat B6 or Bora or in certain hatchback or estate cars.


Some customers ask about visible differences between tinting with film and a factory tint done by the manufacturer. You won’t see any difference on the side window when it’s closed, but when it’s open, you’ll be able to see that the factory tint ends exactly at the top of the glass, whereas with the film tint you’ll see a very small gap, roughly 1 mm, between the film and the edge of the window. We do it in this way to avoid letting the inside rubber catch the film edge and peel it off over time. The edge finish is straight and aesthetic. The side and bottom edges are covered by the interior window trim.

After we fit window film, we recommend that you leave the windows up for 1–2 days and that you don’t clean them from inside during that period of time.


For cleaning purposes we recommend any non-acidic cleaning solution and microfibre cloth.

I hope this helps! If you have any questions related to window tinting, please do not hesitate to contact me.