Koch Chemie Green Star GS - All Purpose Cleaner

Koch Chemie GS Green Star is a powerful cleaner for just about anything!

Green Star is one of those products that quietly earns its place on the shelf. It doesn’t rely on hype or fragrance — it’s simply a very effective, very flexible alkaline cleaner that can be tuned precisely to the job at hand.

What sets it apart is how predictable it is. Adjust the dilution and you change the strength in a controlled, repeatable way, rather than jumping from “too weak” to “too aggressive”. That makes it just as useful for interior plastics as it is for engine bays or exterior grime.

We also like how clean it finishes. When used correctly, it rinses freely without leaving sticky residues, which is something cheaper APCs often struggle with.

For us, Green Star is a true workhorse. If you want one cleaner that can handle a wide range of tasks without drama — and without damaging modern materials — this is exactly the sort of product you build a system around.