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Maximum cut compound

Koch-Chemie Heavy Cut 9.02

Koch-Chemie

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Sale price From £17.99
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SIZE (ML): 250ml

Innovative silicone-free machine polish for fast reworking of heavily weathered paintwork, elimination of deep scratches, and effective removal of paint mists and sanding traces of up to 1,200 grain.

  • Removes severe paint defects
  • Cuts P1200 sanding marks
  • Corrects deep scratches
  • Restores weathered paintwork
  • Removes paint mist
  • Low dust working behaviour
  • Silicone-oil-free formula

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  • Cut 9.0
  • Gloss 6.0
  • P1200 Mark Removal
  • Heavy Cut Compound

The Drivers HQ

Expert Notes

Koch-Chemie Heavy Cut H9.02 is the stronger compound choice for correction work where Heavy Cut H8.02 or Fine Cut F6.01 are not aggressive enough. It is built for heavily weathered paint, deep scratches, paint mist and sanding traces up to P1200, using a very uniform abrasive system that delivers high cut without becoming sticky too quickly. The Gloss 6.0 rating is strong for a compound this aggressive, but H9.02 is still a cutting compound, not a final finishing polish. On most dark, soft or sensitive paints it should be refined afterwards with Koch-Chemie Micro Cut M3.02 or Micro Cut & Finish P3.01. Pad selection controls how hard it cuts. Lambskin gives maximum correction, while the Heavy Cut Pad gives a more controlled approach on finer sanding marks.
Simon Hole Simon HoleFounder, The Drivers HQ

Perfect For / Suitable Surfaces

  • Automotive paintwork
  • Gloss painted panels
  • Weathered paintwork
  • Soft paint systems
  • Refinished paint with testing
  • Commercial vehicle paintwork
  • Motorcycle paintwork

Check paint thickness, suitability and compatibility before machine polishing. Do not use on hot surfaces. Avoid matte paint, satin paint, textured plastics, rubber trim, unpainted plastics, vinyl wraps, PPF and sensitive trims. Mask edges and adjacent trim before correction work.

Technical Specifications

Product Type
Coarse Polishing Compound
Brand
Koch-Chemie
Product Name
Heavy Cut H9.02
Product Code
H9.02
Formula Type
Silicone-Oil-Free Machine Polish
Cut Rating
9.0
Gloss Rating
6.0
Sanding Mark Removal
Up To P1200
Primary Use
Heavy Defect Removal And Paint Correction
Application Method
Machine Polishing
Recommended Machine
Rotary Polisher
Recommended Pad For P1200-P2500
Lambskin Pad
Recommended Pad For P1500-P3000
Heavy Cut Pad
Paint Type
Soft And Scratch-Resistant Paint Systems
Dust Behaviour
Low Dust Formation
Working Behaviour
Long Polishing Cycle
Follow-Up Polish
Micro Cut M3.02 Or Micro Cut & Finish P3.01
Available Sizes
250ml And 1L
250ml Article Number
458250
1L Article Number
458001
Protection Product
No

Paintwork preparation

  1. Wash the vehicle thoroughly.
  2. Remove bonded contamination before polishing.
  3. Dry the paintwork completely.
  4. Inspect defects under suitable lighting.
  5. Measure paint depth where required.
  6. Mask sensitive trims, edges and adjacent surfaces.
  7. Choose a small test section before polishing the full vehicle.
  8. Shake the bottle before use.

Heavy correction

  1. Apply Heavy Cut H9.02 to a lambskin pad for maximum cut.
  2. Spread the compound across a small section before increasing speed.
  3. Work the polish in a crosswise pattern.
  4. Use medium machine speed and medium pressure.
  5. Keep the pad moving to control heat.
  6. Check the panel temperature regularly.
  7. Remove residue with a clean microfibre cloth.
  8. Repeat only where defects remain.

Controlled correction

  1. Use the Koch-Chemie Heavy Cut Pad where a more controlled cut is required.
  2. Apply a small amount of compound to the pad.
  3. Work one section at a time.
  4. Use slow overlapping passes.
  5. Reduce pressure towards the end of the polishing cycle.
  6. Wipe residue away fully.
  7. Inspect the finish before moving to the next section.

Refining after H9.02

  1. Inspect the paint for haze, trails or compound marks.
  2. Refine with Koch-Chemie Micro Cut M3.02 for maximum clarity.
  3. Use Micro Cut & Finish P3.01 where light refining and finish improvement are required.
  4. Use a clean finishing pad for the refining stage.
  5. Panel wipe before applying ceramic coating.
  6. Apply wax, sealant or coating after final surface preparation.

Top Tip: Use H9.02 only when the paint actually needs maximum cut. Start with a test section, then refine afterwards to remove compound haze and improve final gloss.

PerformanceBenefits

Removes sanding marks efficiently
Keeps dust levels low
Cuts faster than H8.02

Best Paired With

Frequently Asked Questions

H9.02 is used for heavy machine polishing, deep scratch removal, paint mist removal, weathered paint correction and sanding mark removal up to P1200.

Koch-Chemie rates Heavy Cut H9.02 at Cut 9.0 and Gloss 6.0.

H9.02 offers higher cut and is rated for sanding traces up to P1200, while H8.02 is slightly less aggressive and rated up to P1500.

Yes, Koch-Chemie lists H9.02 as a silicone-oil-free coarse polishing compound.

Yes, it is designed to remove sanding traces up to P1200 when used with the correct machine and pad.

Use a lambwool pad for P1200 to P2500 sanding marks or a Heavy Cut Pad for P1500 to P3000 sanding marks.

No, it is designed for machine polishing, especially rotary polishing.

No, it is a cutting compound, not a wax, sealant or coating.

Yes, refine with Micro Cut M3.02 or Micro Cut & Finish P3.01 for the best final gloss.

Koch-Chemie Heavy Cut H9.02 is available in 250ml and 1L sizes.

HQ Suggests Tips & Insights

  1. Use H9.02 for serious defect removal only.
  2. Complete a test section before full correction.
  3. Measure paint depth before heavy cutting.
  4. Use lambskin when maximum cut is required.
  5. Use the Heavy Cut Pad for more control.
  6. Keep pads clean during polishing.
  7. Mask trim, edges and delicate areas.
  8. Refine afterwards for better final gloss.

The Brand

Koch-Chemie

Koch-Chemie began in Germany in 1968 when trained carpenter Hans Koch started developing his own polishing compounds after becoming dissatisfied with the vehicle care products available at the time. His interest in surface finishing became the foundation of the company, with the first Koch-Chemie products moving into serial production during the 1970s. The business has remained based in Unna, Germany since 1971 and has expanded from polishing into vehicle cleaning, preparation, car wash chemistry, workshop products and industrial cleaning.

That history still shows clearly in Koch-Chemie's paint correction range. Heavy Cut, Fine Cut and Micro Cut compounds are designed as defined stages of correction and refinement, supported by corresponding pads and preparation products rather than being treated as isolated bottles of polish.

A Detailing Range Built as a System

A Detailing Range Built as a System

Koch-Chemie approaches vehicle care as a complete chemical and process system. Its detailing catalogue covers pre-cleaners, wheel cleaners, foams, shampoos, fallout and tar removal, polishing compounds, sealants, interior cleaners, glass products and specialist treatments. Familiar products including Green Star, Pol Star, Heavy Cut H9.02, Fine Cut F6.01 and Micro Cut M3.02 each occupy a specific position within that process.

The company's ProductSystem takes this further by dividing its chemistry into ten application groups with individual colour codes. Product abbreviations and technical information are incorporated into the labelling so that users can identify what a product is designed to do and where it belongs within the wider system. This structured approach is one of the most identifiable characteristics of Koch-Chemie.

Developed and Produced in Unna

Developed and Produced in Unna

Koch-Chemie operates its own research and development department at its site in Unna, Germany. Formulations are tested for measurable properties including durability, gloss and hydrophobic behaviour, with development also taking material compatibility, regional conditions and professional working processes into account. The company works directly with the automotive industry, car wash operators and industrial customers when developing and refining its chemistry.

Production is also carried out in Unna, where Koch-Chemie mixes its formulations, fills and labels containers and distributes finished products. Its production operation works within DIN EN ISO 9001 quality management and DIN EN ISO 14001 environmental management systems. This combination of in-house development, manufacturing and a clearly defined product system is a substantial part of what separates Koch-Chemie from brands that primarily source and market third-party formulations.

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