Koch Chemie H9.02 Heavy Cut Compound

Koch Chemie H9.02 Heavy Cut Compound is a professional‑grade, coarse machine polishing compound developed for fast correction of heavily weathered paintwork. It is intended for the first correction stage where the goal is meaningful defect removal — deep swirl marks, sanding scratches, oxidation and other entrenched imperfections — before you refine with a lighter polish.

H9.02 uses an extremely homogeneous abrasive grain to deliver a very high cut level while still maintaining usable gloss potential for a compound of this class. In practical terms, that means it can remove significant defects efficiently without the finish becoming ‘chalky’ or unpredictable, provided pad choice, pressure and working time are controlled.

A key detail with heavy‑cut compounds is the balance between abrasive load and lubrication. When the carrier system is too dry, pads can grab and panel temperatures rise quickly; when it is too oily, you lose clarity and correction becomes slower. H9.02 is formulated to stay workable over a longer cycle without sticking, which helps you complete correction passes consistently and with reduced dust generation.

This product sits within our Cutting Compounds & Polishes collection, where it acts as the high‑cut anchor in a structured multi‑step correction workflow.

In terms of pairing, the pad is just as important as the compound. A dedicated heavy‑cut foam pad will keep contact stable, dissipate heat more effectively, and maintain a more consistent abrasive interface. For that reason, we normally pair H9.02 with the Koch Chemie Heavy Cut Foam Pad.

After the heavy‑cut stage, it’s normal to follow with a medium or finishing polish to fully refine the surface and maximise optical clarity. This is where you’ll remove any light micro‑marring from the cutting step and bring the paint to its best possible finish.

H9.02 is part of the broader Koch Chemie system, which makes it easy to build a repeatable process from compounding through to final finishing and protection.

Whether you’re correcting a daily driver that’s been neglected for years or pushing for a near‑perfect finish before protection, H9.02 gives you the correction speed you need, while still keeping the process controlled and professional when used with the right machine, pad and technique.