Koch-Chemie MP Motorplast

engine bay conserver for plastics, rubber and power units

Koch-Chemie MP Motorplast

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£11.99

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Size 500ml

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Koch-Chemie MP Motorplast Koch-Chemie MP Motorplast £11.99

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Koch-Chemie MP Motorplast is a water-displacing conserver for engines, housing parts and rubber hoses, aimed at detailers wanting a naturally shiny, protected engine bay.

  • 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
Read the full description

Full Description

Koch-Chemie MP Motorplast is a water-displacing conserver for engines, housing parts and rubber hoses, aimed at detailers wanting a naturally shiny, protected engine bay.

Naturally shiny, water-displacing conserver for engines, housing parts, rubber hoses and power units of cars, commercial vehicles, etc., with pleasant fragrance. Treated parts regain their new appearance. The complete drying (no lubricating film) prevents dirt sticking. The power units are protected from corrosion and environmental factors by the permanently elastic protective film.

Key features:

  • Naturally shiny, water-displacing formula
  • No lubricating film, dirt resistant
  • Protects against corrosion
  • Temperature-resistant to 250°C

More in Trim Dressings and from Koch-Chemie.

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Key features

  • 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.

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

Caution: 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

How To Use

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.

Performance Benefits

  • Refreshes tired engine bays
  • Displaces surface moisture
  • Helps prevent dirt bonding

Frequently Asked Questions

What is Koch-Chemie Motorplast used for?

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

Is Motorplast an engine bay cleaner?

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

Can Motorplast be used on wet surfaces?

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

Does Motorplast leave a greasy finish?

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

What finish does Motorplast leave?

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

Does Motorplast protect against corrosion?

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

Can I use Motorplast on rubber hoses?

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

Is Motorplast temperature resistant?

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

Can I spray Motorplast on belts or pedals?

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

What sizes are available?

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 (often written Koch Chemie) is a German car care maker from Unna. Hans Koch, a trained carpenter unhappy with the vehicle care products of the time, began mixing his own polishes in his garage in 1968 and founded Koch-Chemie GmbH. The company moved to its Unna headquarters in 1971, developed its Star range in 1990, and has been part of the French Novarc Group since June 2017. It is one of the few companies in the trade that researches, produces and sells its own products, with development and production in Unna, and many of its products are tested and approved by car manufacturers.

At The Drivers HQ we stock Koch-Chemie online with UK delivery and in our Ilkeston shop. Our customers' favourites are Green Star, Gentle Snow Foam, Pol Star, Micro Cut M3.02 and One Cut & Finish P6.02.

Shop all Koch-Chemie
Koch-Chemie Micro Cut and Finish P3.01, Heavy Cut H9.02, Micro Cut M2.02 and Headlight Polish 1 on a black display plinth in a photo studio

Koch-Chemie products by job

Pre-wash and wash. Gentle Snow Foam is a pH-neutral, cherry-scented foam that does not attack waxed or sealed paint. Use about 20ml per litre of water in a foam sprayer, or 50ml in 10 litres as a hand-wash shampoo, and add 10 to 30ml of Green Star to the mix for an active foam on stubborn dirt and insects. Green Star is the alkaline universal cleaner: 1:5 to 1:30 for exteriors and engines, 1:10 to 1:20 for interiors and textiles. Never let it dry or use it on hot panels. Active Foam, Autoshampoo and Ceramic Effect Shampoo complete the wash range, and Magic Wheel Cleaner is the wheel cleaner.

Decontamination and preparation. Eulex and Eulex M remove adhesive and stains, Orange Power lifts adhesive, tree resin and rubber marks, and Panel Preparation Spray cleans the paint before polishing or coating.

Machine polishing. Koch-Chemie gives its machine polishes a cut and gloss rating, and Heavy Cut H9.02, Fine Cut F6.01 and Micro Cut M3.02 are silicone-oil-free. Heavy Cut H9.02 (cut 9.0, gloss 6.0) takes out deep scratches and sanding marks up to 1,200 grit, Fine Cut F6.01 (cut 6.0, gloss 7.0) removes wash marks and 2500-grade sanding marks, and Micro Cut M3.02 (cut 3.2, gloss 9.0) removes holograms, fine scratches and P3000 sanding marks for the final gloss. One Cut & Finish P6.02 (cut 6.0, gloss 8.0) corrects and seals in one step. We also stock Heavy Cut H8.02, Heavy Quick Cut B9.01, Micro Cut M2.02, Micro Cut & Finish P3.01 and the P1.03 and P2.03 finish polishes, plus Headlight Polish 1 and 2 for clouded lenses.

Gloss and protection. ProtectorWax, QF Quick Finish, Quick & Shine and Finish Spray Exterior keep the gloss up between details, and the Coating Towel 5 Pack wipes off residue.

Interior, plastics and glass. Pol Star cleans textiles, leather and Alcantara, COLOURLOCK Leather Care looks after leather, and Allround Surface Cleaner and MZR clean hard interior surfaces. Plast Star is a silicone-free plastic care, alongside Gummifix, Motorplast and Hydro Plast Care. Glas Star and Glass Cleaner Pro clean glass, and Fresh Up tackles odours.

Shop Koch-Chemie by type: snow foam, all purpose cleaners, heavy cut compounds, finishing polishes, quick detailers and glass cleaners.

Koch-Chemie Micro Cut and Finish P3.01 and Heavy Cut H9.02 on a detailing trolley in front of a black BMW M2 Competition having its bonnet machine polished

Choosing a Koch-Chemie polish

Koch-Chemie rates its machine polishes for cut (how much they remove) and gloss (how much shine they leave), so you can pick the stage that matches the paint.

  • Heavy Cut H9.02 (cut 9.0, gloss 6.0) is the first stage on heavily weathered paint, deep scratches and sanding marks up to 1,200 grit. It suits soft and scratch-resistant paint. Koch-Chemie recommends a rotary polisher at medium speed and pressure, then a finishing stage with Micro Cut M3.02 or Micro Cut & Finish P3.01.
  • Fine Cut F6.01 (cut 6.0, gloss 7.0) is the middle stage for medium to heavily weathered paint and wash marks, at no more than 2,000rpm. Remove any streaks it leaves with Micro Cut M3.02.
  • Micro Cut M3.02 (cut 3.2, gloss 9.0) is the finishing polish. It removes holograms and fine scratches rather than filling them, which makes it the one to finish dark and sensitive colours.
  • One Cut & Finish P6.02 (cut 6.0, gloss 8.0) corrects and seals in one step, with carnauba wax, on a dual action polisher with at least a 15mm stroke: five pea-sized drops on the pad. Keep it off painted plastics and rubber.

Use a separate pad for each polish, keep off hot panels and store polishes away from frost and heat. For the pads and machines, see our polishing pads and polishing machines.

  • Product AdviceAsk for help choosing compatible products and equipment.
  • Trade MembershipTrade Members get 10% off every product except sale items and gift cards.
  • Shop in StoreBrowse products and speak to the team in Ilkeston.

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