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APC for exterior, interior and engine

Koch-Chemie Green Star Universal Cleaner

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£9.99

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Koch-Chemie Green Star Universal Cleaner £9.99
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Koch-Chemie Green Star is a highly concentrated, phosphate and solvent-free alkaline universal cleaner, aimed at workshops and detailers needing one cleaner for floors, engines and vehicles.

  • Cuts grease and grime
  • Dilutes for multiple jobs
  • Works inside and outside
  • Suitable for engine bays
  • Cleans textiles when diluted
  • Useful on workshop floors
  • Phosphate and solvent free
  • Professional Koch-Chemie APC
Read the full description

Full Description

Koch-Chemie Green Star is a highly concentrated, phosphate and solvent-free alkaline universal cleaner, aimed at workshops and detailers needing one cleaner for floors, engines and vehicles.

Highly concentrated, phosphate- and solvent-free, alkaline universal cleaner. Universally usable for the areas of workshop floor and industrial cleaning, interior and exterior cleaning of cars and trucks and engine cleaning thanks to its enormous dirt and oil carrying capacity.

Key features:

  • Phosphate and solvent-free alkaline formula
  • VDA class A conform
  • Max. 5 minute reaction time
  • Usable up to 1:3 concentration

More in All Purpose Cleaners and from Koch-Chemie.

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Key features

  • Alkaline APC
  • pH 12.5 Formula
  • Highly Concentrated
  • Phosphate Free
  • Solvent-Free Formula

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Expert Notes

Koch-Chemie Green Star is one of the most useful cleaners in the Koch-Chemie range because it can be diluted to suit very different cleaning jobs. Used stronger, it has the bite needed for exterior pre-cleaning, engine bay work and oily grime. Diluted further, it can be used for suitable interior and textile cleaning, then much weaker again for workshop and industrial floor cleaning. The formula is alkaline at pH 12.5, so dilution and dwell time matter. It should not be treated like a ready-to-use interior cleaner or sprayed carelessly over sensitive finishes. Use the right dilution for the surface, keep it away from hot panels, do not let it dry and remove product residue properly after cleaning.

Perfect For / Suitable Surfaces

  • Exterior plastics
  • Rubber trim
  • Engine bay plastics
  • Door shuts
  • Wheel arches
  • Tyre sidewalls
  • Textiles with care
  • Interior plastics with care
  • Commercial vehicles
  • Machines and equipment

Caution: Do not apply to hot surfaces and do not allow Green Star to dry. Use correct dilution on interiors, textiles, anodised aluminium, sensitive plastics, fresh paint, delicate finishes, wraps, PPF and coated surfaces. Rinse exterior areas thoroughly or remove residue with a damp cloth or wet vacuum where appropriate.

Technical Specifications

Product Type
Universal Cleaner
Brand
Koch-Chemie
Product Name
Green Star
Product Code
GS
Formula Type
Highly Concentrated Alkaline Cleaner
pH Value
12.5
Phosphate Free
Yes
Solvent Free
Yes
Primary Use
Universal Cleaning And Degreasing
Exterior Dilution
1:5 To 1:30
Engine Bay Dilution
1:5 To 1:30
Interior Dilution
1:10 To 1:20
Textile Dilution
1:10 To 1:20
Floor Cleaning Dilution
1:40 To 1:120
VDA Classification
Class A
VDA Reaction Time
Maximum 5 Minutes
VDA Maximum Application Concentration
1:3
Available Store Sizes
1L, 5L, 11L And 22L
Official Koch-Chemie Containers
1L, 5L, 11kg And 22kg
1L Article Number
291001
5L Article Number
291005
11kg Article Number
291011
22kg Article Number
291022
Professional Use
Yes

How To Use

Exterior cleaning

  1. Dilute Green Star according to the level of dirt.
  2. Use 1:5 for heavier exterior grime.
  3. Use 1:30 for lighter cleaning.
  4. Apply to cool surfaces only.
  5. Allow a short dwell time.
  6. Agitate where required with a suitable brush.
  7. Do not allow the product to dry.
  8. Rinse thoroughly using clean water or a pressure washer.

Interior and textile cleaning

  1. Dilute Green Star between 1:10 and 1:20.
  2. Test on a hidden area before cleaning.
  3. Apply to a cloth, brush or suitable sprayer.
  4. Agitate the surface lightly where needed.
  5. Remove residue using a damp microfibre cloth.
  6. Use a wet vacuum on textiles where appropriate.
  7. Avoid over-wetting sensitive materials.
  8. Allow the area to dry fully.

Engine bay cleaning

  1. Make sure the engine bay is cool.
  2. Cover or avoid sensitive electrical components.
  3. Dilute Green Star between 1:5 and 1:30.
  4. Apply to suitable plastics, rubber and metal areas.
  5. Allow a short dwell time.
  6. Agitate oily or greasy areas where required.
  7. Rinse or wipe away residue carefully.
  8. Dry the area before applying any dressing.

Floor and workshop cleaning

  1. Dilute Green Star between 1:40 and 1:120.
  2. Apply to the floor using suitable cleaning equipment.
  3. Allow brief contact time for dirt to loosen.
  4. Agitate where needed.
  5. Remove the dirty solution from the surface.
  6. Rinse or neutralise according to site process.
  7. Allow the area to dry before use.

Top Tip: Start with the weakest dilution that does the job. Green Star is highly concentrated, so stronger mixes should be kept for heavier dirt, grease and engine bay work.

Performance Benefits

  • Breaks down oily dirt
  • Handles exterior grime
  • Useful for engine cleaning
  • Works on textile contamination

Frequently Asked Questions

What is Koch-Chemie Green Star used for?

Green Star is a concentrated alkaline APC for exterior cleaning, engine bays, suitable interiors, textiles, workshop floors and industrial cleaning.

Is Koch-Chemie Green Star ready to use?

No, Green Star is highly concentrated and should be diluted to suit the cleaning task.

What dilution should I use for exterior cleaning?

Koch-Chemie recommends 1:5 to 1:30 for vehicle exterior and engine cleaning, depending on the level of dirt.

What dilution should I use for interiors?

Koch-Chemie recommends 1:10 to 1:20 for vehicle interior and textile cleaning

Can Green Star be used in engine bays?

Yes, it can be used for engine cleaning at the correct dilution, but avoid hot surfaces and sensitive electrical components.

Is Green Star pH neutral?

No, Green Star is alkaline and Koch-Chemie lists the pH value as 12.5.

Is Green Star safe on textiles?

It can be used on suitable textiles at the correct dilution, but always test first and remove residue properly.

Can Green Star be allowed to dry?

No, Koch-Chemie warns not to let Green Star dry on the surface.

Is Green Star phosphate and solvent free?

Yes, Koch-Chemie lists Green Star as phosphate-free and solvent-free.

What sizes are available?

This listing covers 1L, 5L, 11L and 22L store sizes, with official Koch-Chemie containers listed as 1L, 5L, 11kg and 22kg.

HQ Suggests Tips & Insights

  1. Use 1:5 only for heavier grime.
  2. Use weaker dilution for regular cleaning.
  3. Test interiors before full use.
  4. Do not let Green Star dry.
  5. Avoid hot surfaces.
  6. Rinse exterior areas thoroughly.
  7. Remove interior residue with a damp cloth.
  8. Use a wet vacuum for textile work.
  9. Keep separate brushes for engine bays and interiors.

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.

Shop all Koch-Chemie
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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