Koch Chemie Heavy Cut Compound H9.02 is a professional-grade high-cut machine polish engineered for fast, aggressive paint correction on heavily weathered, oxidized, or damaged paintwork. Formulated with a highly uniform abrasive grain, H9.02 removes deep scratches, heavy oxidation, paint overspray, and sanding marks down to P1200 grit quickly and efficiently, while still finishing out to a clean, glossy surface that minimizes the follow-up work needed.

The low-dust formula allows extended polishing cycles without loading up the pad or sticking, making it efficient and clean to work with on dual-action and rotary polishers alike. Safe for use on soft and scratch-resistant clear coat systems across all paint types. The uniform abrasive grain delivers consistent, predictable cutting performance across every pass.

If you are searching for the best heavy cut compound for paint correction, a professional Koch Chemie cutting compound for removing deep scratches and oxidation, or a high-performance machine polish for severely weathered clear coat, H9.02 Heavy Cut is the benchmark heavy correction product in the Koch Chemie lineup and a trusted tool in professional paint correction shops worldwide. Available in 250ml, 1L, and 5L.

Koch Chemie H9.02 Usage & Pad Pairing

Heavy Cut H9.02 is Koch Chemie's aggressive cutting compound — step 1 of the 3-step KCX compound system. Built for deep scratches, swirl marks, sanding mark removal, and heavy defects on harder clear coats.

• Recommended pad: Koch Chemie Heavy Cut Pad
• Application: 4-6 pea-sized drops per pad. Prime new pads by working compound in for 10 seconds before full application.
• Machine: Rotary, DA, or long-throw DA. Heavy cut expects 1500-2500 RPM rotary or equivalent DA speed.
• Work area: 2'×2' panels. 4-6 passes with medium-firm pressure.

Next step: Follow with Fine Cut F6.01, then Micro Cut M3.02 for the full 3-step system. The 3-Step Compound Bundle packages all three.

Frequently Asked Questions

What pad should I use with Koch Chemie Heavy Cut H9.02?

The Koch Chemie Heavy Cut Pad (yellow) is designed specifically for H9.02. For softer clears or less-aggressive correction, you can pair H9.02 with a microfiber cutting pad. Avoid soft finishing pads — you'll lose the cut.

Is Koch Chemie H9.02 too aggressive for German paint?

Not necessarily — German clearcoats are typically harder and respond well to H9.02 on the right pad. Test panel first. On softer Japanese or newer soft clears, skip straight to Fine Cut F6.01 or One Cut P6.02 as a one-step.

How many cars can I detail with 1L of Koch Chemie Heavy Cut?

Realistically 8-12 full corrections on 1L depending on how much paint you're cutting and pad management. H9.02 is concentrated — you rarely need more than 4-6 pea drops per pad.

Koch Chemie 3-step compound order — which first?

Heavy Cut H9.02 first (most aggressive, removes defects), then Fine Cut F6.01 (removes haze and refines), then Micro Cut M3.02 (final jeweling for maximum gloss). Always follow the step-down sequence for clean, hologram-free paint.

Buying for a shop? See our Koch Chemie wholesale program for B2B pricing on Koch Chemie Heavy Cut H9.02 and the full Koch Chemie lineup.