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Machine polish for serious paint correction

Koch-Chemie Heavy Cut 8.02

Koch-Chemie

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Sale price From £15.99
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SIZE (ML): 250ml

Innovative 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 1,500 grain.

  • Removes heavy paint defects
  • Cuts P1500 sanding marks
  • Corrects deep scratches
  • Restores weathered paintwork
  • Removes paint mist
  • Low dust working behaviour
  • Silicone-oil-free formula

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  • Cut 8.5
  • Gloss 5.0
  • Heavy Cut Compound
  • P1500 Mark Removal

The Drivers HQ

Expert Notes

Koch-Chemie Heavy Cut H8.02 is a coarse machine polishing compound for correction work where lighter polishes do not have enough bite. It is designed to remove heavy weathering, deep scratches, paint mist and sanding marks up to P1500, while still finishing to a usable gloss level for a compound of this strength. The homogeneous abrasive grain gives controlled cutting performance with low dust and good working time, which is helpful on larger panels and harder paint systems. Pad choice matters. Lambswool gives the most correction on coarser sanding marks, while a foam polishing pad gives a more controlled cut on finer sanding traces. For maximum finish quality, refine afterwards with a suitable Koch-Chemie finishing polish.
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 H8.02
Product Code
H8.02
Formula Type
Silicone-Oil-Free Machine Polish
Cut Rating
8.5
Gloss Rating
5.0
Sanding Mark Removal
Up To P1500
Primary Use
Heavy Defect Removal And Paint Correction
Application Method
Machine Polishing
Recommended Machine
Rotary Polisher
Recommended Pad For P1500-P2500
Lambswool Pad
Recommended Pad For P2500-P5000
Polishing Pad
Paint Type
Soft And Scratch-Resistant Paint Systems
Dust Behaviour
Low Dust Formation
Approval
Daimler Approved
Available Sizes
250ml And 1L
250ml Article Number
312250
1L Article Number
312001
Protection Product
No
Professional Use
Yes

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 test section before polishing the full vehicle.
  8. Shake the bottle before use.

Heavy correction

  1. Apply Heavy Cut H8.02 to a lambswool pad for stronger cut.
  2. Spread the compound across a small section before increasing machine 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 surface regularly during polishing.
  7. Remove residue with a clean microfibre cloth.
  8. Repeat only where defects remain.

Controlled polishing

  1. Use a polishing pad where less aggressive correction is required.
  2. Apply a small amount of compound to the pad.
  3. Work one section at a time.
  4. Use controlled 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.

Finishing after heavy cut

  1. Inspect the paint for haze or compound marks.
  2. Refine the finish with a suitable Koch-Chemie finishing polish.
  3. Use a clean finishing pad for the refining stage.
  4. Panel wipe before applying ceramic coating.
  5. Apply wax, sealant or coating after final preparation.

Top Tip: Always complete a test section first. Heavy Cut H8.02 is a serious correction compound, so pad choice and paint hardness will change the result significantly.

PerformanceBenefits

Cuts quickly on heavy defects
Removes sanding marks efficiently
Keeps dust levels low

Best Paired With

Frequently Asked Questions

It is used for machine polishing heavily weathered paintwork, deep scratches, paint mist and sanding marks up to P1500.

Koch-Chemie rates Heavy Cut H8.02 at Cut 8.5 and Gloss 5.0.

Yes, it is a silicone-oil-free coarse polishing compound.

Yes, Koch-Chemie states it can remove sanding traces up to P1500.

Use lambswool for stronger correction on P1500 to P2500 marks, or a polishing pad for finer sanding traces from P2500 to P5000.

No, it is designed as a machine polishing compound.

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

Yes, refining with a finishing polish is recommended for the best final gloss, especially on dark or softer paint.

No, it is not suitable for matte finishes, satin finishes, wraps or PPF.

This listing covers 250ml and 1L sizes.

HQ Suggests Tips & Insights

  1. Use a test section before full correction.
  2. Measure paint depth where needed.
  3. Use lambswool only when heavy cut is required.
  4. Use foam for more controlled correction
  5. Keep pads clean during polishing.
  6. Do not polish hot panels.
  7. Mask trim and sharp edges before use.
  8. Refine afterwards for maximum gloss.
  9. Panel wipe before applying ceramic protection.

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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