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Streak-free exterior and interior glass

Koch-Chemie Glas Star Glass Cleaner

Koch-Chemie

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Sale price From £10.99
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Size: 1L

The concentrated, alcohol based glass cleaner for all smooth, alcohol-resistant surfaces on vehicles, buildings, etc.

  • Removes oily glass residue
  • Cuts through grease marks
  • Clears insect contamination
  • Removes silicone and wax residue
  • Works neat or diluted
  • Wipes away without streaks
  • Improves cloth glide
  • Useful in winter conditions

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  • Concentrated Formula
  • Alcohol-Based Formula
  • Streak-Free Wipe Off
  • 1:3 Dilution Option

The Drivers HQ

Expert Notes

Koch-Chemie Glas Star is a concentrated glass cleaner designed for smooth, alcohol-resistant surfaces where normal ready-to-use glass cleaners may not have enough bite. The alcohol-based formula helps break down oily traffic film, grease, silicone residue, wax residue, insects and light spray mist, which makes it useful for both detailing work and workshop environments. Its gloss and smoothness additive improves towel movement across the glass, helping reduce drag during wiping. Glas Star can be used neat for heavier contamination or diluted up to 1:3 with de-ionised water for regular glass cleaning. It is best used with a dedicated glass microfibre towel and controlled application rather than flooding the surface.
Simon Hole Simon HoleFounder, The Drivers HQ

Perfect For / Suitable Surfaces

  • Vehicle windows
  • Windscreens
  • Side glass
  • Rear glass
  • Mirrors
  • Building glass
  • Workshop glass

. Use only on smooth alcohol-resistant surfaces. Avoid screens, delicate plastics, polycarbonate, instrument displays, tinted film edges, fresh window tint, sensitive coatings and unknown surfaces unless compatibility has been confirmed.

Technical Specifications

Product Type
Premium Glass Cleaner Concentrate
Brand
Koch-Chemie
Product Name
Glas Star
Formula Type
Alcohol-Based Concentrate
Primary Use
Glass And Smooth Surface Cleaning
Dilution
Use Neat Or Dilute Up To 1:3
Recommended Dilution Water
De-Ionised Water
Residue Removal
Oil, Grease, Silicone, Wax Residue, Insects And Light Spray Mist
Surface Type
Smooth Alcohol-Resistant Surfaces
Finish
Streak-Free When Used Correctly
Cloth Glide Additive
Yes
Winter Use
Suitable
Approval
Daimler Approved
Available Store Sizes
1L And 10L
10L Article Number
44010
Professional Use
Yes

Regular glass cleaning

  1. Make sure the glass is cool.
  2. Dilute Glas Star up to 1:3 with de-ionised water if required.
  3. Spray the cleaner onto a dedicated glass cloth.
  4. Wipe the glass evenly using straight overlapping passes.
  5. Turn the cloth regularly during use.
  6. Buff with a second dry glass cloth if needed.
  7. Inspect from different angles for remaining smears.

Heavy residue removal

  1. Use Glas Star neat where stronger cleaning is needed.
  2. Spray a small amount onto a clean glass towel.
  3. Work the affected area until the residue starts to lift.
  4. Repeat only where contamination remains.
  5. Use a second clean towel for the final wipe.
  6. Do not allow residue to dry around trims or edges.

Interior glass use

  1. Spray onto the cloth rather than directly onto the glass.
  2. Keep product away from screens, controls and sensitive trim.
  3. Wipe the glass in controlled sections.
  4. Use a dry towel for the final finish.
  5. Check the glass in natural light where possible.

Top Tip: Use one towel for cleaning and a second dry glass towel for the final buff. This reduces smearing, especially on interior windscreens.

PerformanceBenefits

Breaks down greasy traffic film
Removes stubborn glass marks
Leaves a clean clear finish
Works well in cold conditions

Best Paired With

Frequently Asked Questions

Glas Star is used for cleaning vehicle glass, mirrors and other smooth alcohol-resistant surfaces.

It can be used neat or diluted up to 1:3, ideally with de-ionised water.

Yes, Koch-Chemie lists wax residue as one of the contaminations Glas Star can remove.

Yes, it is designed to remove silicone residue from compatible smooth surfaces.

Yes, but spray it onto the cloth first to avoid overspray on dashboards, screens and trims.

Only use it on smooth alcohol-resistant surfaces. Avoid delicate plastics, polycarbonate and screens unless compatibility is confirmed.

It is designed to run off quickly without streaks when used with clean glass towels and correct technique.

Use neat for heavier contamination or dilute up to 1:3 for regular cleaning.

Yes, Koch-Chemie states the alcohol content makes it ideal for winter use.

This listing covers 1L and 10L sizes.

HQ Suggests Tips & Insights

  1. Use de-ionised water when diluting.
  2. Spray onto the cloth for interior glass.
  3. Use dedicated glass towels only.
  4. Keep glass towels separate from polish towels.
  5. Use neat for heavier oily residue.
  6. Dilute for regular maintenance cleaning.
  7. Avoid screens and delicate plastics.
  8. Clean the inside windscreen last during interior work.
  9. Replace towels if they start dragging or smearing.
  10. Available online with UK-wide delivery from The Drivers HQ.

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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