It needs proper dilution depending on where it will be used, but it cleans very well!! I am an amateur, maybe a professional's opinion would be more informative!!

I will agree with the previous reviewers. It is an excellent cleaner and very concentrated! Especially the car's plastic parts in the interior and engine bay, it makes them look like new.

Very good product but it is for the exterior of the car because it has 12.5 pH and damages the plastics over time (for the interior MZR is better even though it also has 12.5 pH). As a pre-wash and engine cleaner, it is an excellent product

I used it with a pressure washer to clean an agricultural tractor that was covered with dried mud. Ratio about 1:10. It took 2 sprays, a total of 2 liters of solution, and the machine changed color. It is ultra-concentrated, economical, and definitely effective.

Excellent product, very economical with dilutions. It can remove very tough dirt such as from the engine or rims with a 1/5 dilution, and the car interior—carpets, seats, plastic parts—with dilutions from 1/10 to 1/15. It is truly worth it!

Amazing cleaner for multiple surfaces. I cleaned everything from the car engine to my sneakers and it did a very good job. Especially in a mini foamer that turns it into foam, it works wonders.

It's not just for washing with foam as everyone says, along with gentle foam. For general cleaning or for bucket and hand, it's good together.

Due to its dilution, it is worth the money. It foams in a foam gun. Among the products of koche, it is one of the worthy ones. I believe that the APC from K2 is also comparable and at half the price.

I have used it for interior cleaning of the car, dashboard, plastics, doors, etc., and for exterior on rims, always with the recommended ratios for each section, and the results were excellent. Be careful with the ratios because the pH is high. It's better to consult videos on YouTube as well.

Very good, I use it for pre-washing with a foam cannon on my car and motorcycle, if the vehicle is not too dirty you don't even need to wash it by hand, pre-wash with this, rinse, wipe, and ready. Of course, it may be affected by the fact that I usually use spray wax after washing and it cleans more easily

Powerful cleaner, I use it in a manual (cheap Chinese) foamer and it creates a nice foam and cleans as it should (for heavy dirt, you need to use your hands, don't have any illusions).

Excellent general cleaner. I diluted 20 g in 500 g of water. I applied the product and after 5 minutes rinsed with a strong flow of water.

Okay, for its price it's worth it, but I wouldn't compare it in any way to the K2 APC, which is even more worth it for its price. I wouldn't buy it again.

I got it for a gas grill
it didn't help me at all
I can't understand what kind of dirt it cleans...
the ferry seems better to me

If not the best, then one of the best all-purpose cleaners.
For leather, soft/hard plastics dilution 1:10.
For tires/wheels 1:5.
It's worth the money since it allows for large dilutions for its price.
A big plus is that it comes in 1L and 5L packaging.

Incredible product, it removed dirt from the interior of a 20-year-old car that I thought would never come out. Dilution 1:10 and I used it on plastics, dashboard, upholstery, and seats.

Very good products, I tried them for the first time, mixed in a 10-liter bucket of water, dosage with a measuring cup of 50 ml each,
There was a very good cleaning, it left nothing, they are excellent products

Simply excellent!!! With dilutions of 1/5 for tires-rims, 1/10 for interior plastics, and 1/20 for seats-carpets, it made everything spotless. Incredible product, very economical and powerful cleaner. I removed 7-8 liters with one package of cleaners that if I bought separately I would need at least 100 euros for the same cleaning quality!

I put 40(!) ml in a Karcher foam gun 800ml together with 40ml of GSF and sprayed a car that was covered in fresh mud. The result was nothing. I rinsed the car and it was as if I just sprayed it with plain water from the hose. Does it work? Why so many positive comments on a product that with double the dose as recommended does nothing. As for the GSF, I can't even say it's good for kids.

I have been using it for over 2 years, high concentration (I mix it with deionized water in a dilution of 1:10, in a 1000ml bottle 90ml green star and 910ml water). Spending 9 euros for the 1 liter package I make 11 liters!!!! general purpose cleaner (cost of liter about 0.80€) that I use everywhere, cleaning the interior and exterior of cars and trucks, for engine cleaning (I attach a photo, before and after) thanks to its ability to remove dirt and oil, for cleaning tires and rims, and more, if you see the 2 photos (of the child seat you will understand.
Pay attention to the dilution (you can increase or decrease the ratio according to the dirt) and before using it, test it in a "blind spot" test to make sure it will not cause you any problems.

Koch Chemie = Guarantee.
Even with high dilution, it cleans everything from floors and grease to household stains. Also, it doesn't smell at all.

Excellent product...!!!

It's worth it and more, I decided to try it after so many positive comments it has.
It really does what it promises.

Pay attention to the dilution it requires with water.

What I noticed when washing the car is that after rinsing with water, the towel I use for drying doesn't have much water on it, it's almost dry and doesn't need much wringing out each time.

Whatever I say is not enough. Excellent. You clean everything and very economically. I have made about 15 bottles of APC and the level is between the Koch Chemie logo and Gs. With 30 ml of this, you can make a bottle of APC that some companies sell for 15-20 € for example. So with the 8.5 € that I bought it for, I have made so far 260 € in cleaning products, ready-made, from other companies. I use it almost everywhere in the car as follows: I have kept 2 old 700 ml spray bottles from detol and I have 2 dilutions: 1:15 and 1:25. Greater dilution for laminates, upholstery, carpets, and leather, and smaller for the engine bay and areas with stubborn dirt where I spray before washing. Even for deep cleaning on leather (once a year) that is "not recommended," I have not encountered any problems and from what I saw, detailers like Obsessed Garage use APC with a much stronger dilution (1:7 for example).

For its price, it is the best. I cleaned my car engine with a spray and water without any pressure, and the dirt would just drip off as soon as you applied the product. I will definitely buy it again in the future.

It is a very good cleaner!! However, be careful with the proportions because if the solution does not come out diluted, it will leave gray marks when it dries!! I have used it with a foam sprayer in a pressure washer with excellent results!!

It does exactly what it promises. Perhaps the best APC on the market and very affordable.

Highly recommended

With a ratio of 1:10, it produced blackness on shadows, wallpapers, and other surfaces. It's worth trying because it has a low price and will definitely last you for a long time.

Excellent all-purpose cleaner for the car and incredibly economical due to its high dilution.

I didn't put it to difficult tests, but at a dilution of 1 to 10, it does a satisfactory job and is definitely worth it.

The best product on the market, economical and reliable company in its entire range. I use it as a pre-wash booster, on wheels with less dilution, etc