ok. it leaves a protective film.....of course, it needs to be applied carefully because it leaves streaks with the sponge it has ... generally ok

With proper use according to the instructions, it lasted less than a year, cleaning and reapplication were done again and again it did not last even with 3 coats. Give the corresponding money to a body shop that will apply proper protection and you will have peace of mind for years

1 photo before and 2 after

After sanding with sandpaper and applying several coats with headlight polish (I did the same with the motorcycle windshield),
you apply two layers and it really keeps the shine for quite a while.
I also used the headlight polish from the same company.
VFM

It does what it promises! I applied it after sanding and polishing with another product on car headlights and the result was amazing. Let's see how long it will last.

It does what it says, lasts quite a long time
but if you want to see your headlights looking new, with a little money go to a headlight specialist and you'll be shocked by the result.

I used it in combination with the ointment from the same company. So far, the result is very good!

It does what it says as after cleaning with the ointment from the same company, a month later they hold up just fine!

In combination with K2 Lamp Doctor and rubbing, it did a very good job. After 2 months from the application, it is still in great condition.

I expected better results which I did not see. I will try with a different cream and see if it makes a difference.

Easy to use. I passed it through 3 hands instead of 2 as it says on the back, and it held up. So far, very good. First, I passed the lights with k2 lamp doctor and "sealed" them with this

After sanding and applying the varnish, over time and a little more, the headlights have started to oxidize. I don't know if without the varnish they would have made a difference...

After using the lamp doctor from K2 (headlight polishing cream), I applied the varnish and they looked nice. Time will tell how durable it is and how much it lasts. For now, I am completely satisfied.

I have been using it on my headlights for about 2 months now... For maintenance! It seems to do the job.... The headlights haven't fogged up at all! Only time will tell

I stored it together with 2 other k2 products that I had in my order in a warehouse away from sunlight and heat. When I opened it to use it, it was solidified and useless. I will prefer a spray varnish next time. I don't know if it's the skroutz point that is in the sun and all the products were hot when I received them, or if the product was already expired, but for me it was 4€ wasted and a bad experience that I will not repeat.

2 stars because after three months of use, the headlights started to turn yellow again and after washing the car, the headlights easily scratched by hand. The varnish is very soft. In my opinion, it is better to spend the money on a professional to restore and apply car varnish in an oven, etc., rather than using such products every now and then

Really, in combination with the Lamp Doctor paste from K2, it makes the headlights look like new.
I will definitely buy it again.

Words are not enough!

Together with the liquid for headlights of the same K2 series, I also bought the polish and it made the headlights look brand new! After first sanding them with water sandpaper!

I tried it out and after 2 minutes of using it with a simple cloth, it has become fantastic. I highly recommend it and I would buy it again, but I don't know about the blue sponge and how to apply the varnish.

There are no instructions on how to use this blue sponge and from which side. I rubbed the headlights with sandpaper gradually from No 400 to 2500 and for a long time. Then I applied K2. The yellowing did go away but there remained a very slight haze that doesn't make them look like new.

The product is for PROTECTION and not for cleaning the headlight. After you finish the cleaning process, you apply a "coat" and if you want, a second one after 30 minutes. If you want to clean, you need another product. I recommend the Arexons for 4€.

The varnish is very good, at least in terms of immediate visible results, but something tells me that it will do what it promises. Well, my headlights were in a terrible condition, which I managed to improve to a good extent with sandpaper and polish, but what really made them shine was after 4 applications of the K2. You might ask why 4? That's how many it took until it finished. So it definitely lasts for several applications. It is easy to use by following the instructions found in the packaging or through the company's video. Edit: Although it claims to be scratch-resistant, I am in an unpleasant position to say that it scratches relatively easily after washing with a hard sponge.

It passed the summer test with the car constantly exposed to the sun. If it withstands the promised 2 years, it will be great, because without protection, over time you see the dullness. There is still some quantity left, I believe it will last another time.
After 2 years, the protection still holds.

Easy to use, if it lasts a few months then it will be perfect. After using it for a month, it's definitely worth its money.

Very good, it makes the lights new again, just make sure to do it with sandpaper first. And then you polish them and they become new. I did it and the result is fantastic. I will also add a photo.

The lights were replaced and the varnish was applied instead of the cream following the instructions on the box.
Overall, it's good quality, exactly what you expect from a varnish.
Now, how long it will last is another matter.