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engine bay conserver for plastics, rubber and power units

Koch-Chemie MP Motorplast

Koch-Chemie

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Sale price From £11.99
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Size (ML): 500ml

Naturally shiny, water-displacing conserver for engines, housing parts, rubber hoses and power units of cars, commercial vehicles, etc. with pleasant fragrance.

  • Refreshes engine bay plastics
  • Restores rubber hose appearance
  • Leaves a natural shine
  • Protects against corrosion
  • Works on wet or dry surfaces
  • Dries without greasy residue
  • Helps reduce dirt sticking
  • Temperature-resistant to 250°C

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  • Engine Bay Dressing
  • Water-Displacing Formula
  • Natural Shine Finish
  • 250°C Resistant

The Drivers HQ

Expert Notes

Koch-Chemie Motorplast is a specialist engine bay finishing product designed for cleaned engine compartments, housing parts, rubber hoses and power units. It is not a degreaser or heavy cleaner. Use it after the engine bay has already been cleaned and rinsed or wiped down. The key benefit is that it can be applied to wet or dry surfaces, making it useful after engine bay cleaning when plastics and rubber are still holding moisture. Once dry, Motorplast leaves a naturally shiny, non-greasy finish with a permanently elastic protective film. This helps treated parts look fresher while adding resistance against corrosion and environmental factors. It is a proper trade-style engine bay conserver, not a slippery silicone dressing for pedals, tyre tread or vehicle controls.
Simon Hole Simon HoleFounder, The Drivers HQ

Perfect For / Suitable Surfaces

  • Engine bay plastics
  • Rubber hoses
  • Power units
  • Housing parts
  • Engine covers
  • Plastic reservoirs
  • Car engine bays
  • Motorcycle engine areas with testing
  • Agricultural machinery areas with testing

Do not use on surfaces where slipperiness is undesirable. Avoid pedals, tyre tread, belts, braking components, steering wheels, control surfaces, hot exhaust parts, delicate electronics and intake openings. Apply only to suitable pre-cleaned areas.

Technical Specifications

Product Type
Engine Bay Conserver
Brand
Koch-Chemie
Product Name
Motorplast
Product Code
Mp
Primary Use
Engine, Housing Part, Rubber Hose And Power Unit Conservation
Finish
Naturally Shiny
Formula Behaviour
Water-Displacing
Dry Finish
No Lubricating Film
Protection Type
Permanently Elastic Protective Film
Corrosion Protection
Yes
Environmental Protection
Yes
Temperature Resistance
Up To 250°C
Fragrance
Pleasant Fragrance
Application Surface
Wet Or Dry Pre-Cleaned Surfaces
Application Method
Spray Bottle Or Cyclone
Cleaner Product
No
Daimler Approval
Yes
Official Containers
500ml, 5L, 20L And 200L
500ml Article Number
236500
5L Article Number
236005
20L Article Number
236020
200L Article Number
236200
Professional Use
Yes

Engine bay preparation

  1. Allow the engine bay to cool before cleaning.
  2. Remove loose dirt from the area.
  3. Clean grease and grime with a suitable cleaner first.
  4. Rinse or wipe away cleaner residue properly.
  5. Avoid soaking sensitive electrical areas.
  6. Leave the engine bay wet or dry before applying Motorplast.
  7. Check compatibility on sensitive materials before full use.

Application

  1. Apply Motorplast using a spray bottle or Cyclone.
  2. Mist an even thin film over suitable engine bay plastics, rubber hoses and housing parts.
  3. Avoid belts, pulleys, braking components, controls and intake openings.
  4. Do not over-apply in tight areas.
  5. Leave the product to dry naturally.
  6. Wipe excess from unwanted areas if needed.
  7. Inspect the finish once fully dry.

After application

  1. Allow treated areas to dry fully before use where possible.
  2. Check that no product has reached belts or slippery surfaces.
  3. Wipe down surrounding painted edges if overspray is present.
  4. Reapply after future engine bay cleaning when protection and appearance need refreshing.

Top Tip: Use Motorplast after engine bay cleaning while the bay is still slightly damp. Its water-displacing behaviour makes it ideal for finishing cleaned plastics and rubber without needing every area bone dry first.

PerformanceBenefits

Refreshes tired engine bays
Displaces surface moisture
Helps prevent dirt bonding

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Frequently Asked Questions

Motorplast is used to conserve and refresh engines, housing parts, rubber hoses and power units after cleaning.

No, it is an engine bay conserver and dressing. Clean the engine bay first, then apply Motorplast as the finishing stage.

Yes, Koch-Chemie states it is suitable for use on pre-cleaned wet or dry surfaces.

No, once fully dry it does not leave a lubricating film.

It leaves a naturally shiny finish on treated engine bay parts.

Yes, it leaves a permanently elastic protective film that helps protect power units from corrosion and environmental factors.

Yes, Koch-Chemie lists rubber hoses as one of the intended areas of use.

Yes, Koch-Chemie states Motorplast is temperature-resistant to 250°C

No, avoid belts, pedals, tyre tread and any surface where slipperiness is unsafe.

Koch-Chemie officially lists Motorplast in 500ml and 5L containers.

HQ Suggests Tips & Insights

  1. Clean the engine bay before use.
  2. Apply to wet or dry pre-cleaned areas.
  3. Use a fine mist for even coverage.
  4. Do not over-apply around tight parts.
  5. Avoid belts and moving components.
  6. Keep away from braking parts.
  7. Allow to dry fully after application.
  8. Wipe unwanted overspray immediately.
  9. Use after every proper engine bay clean.
  10. Choose larger sizes for trade refilling.

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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