Interior & trim care by Koch-Chemie

Koch-Chemie interior care for your materials and preferred finish

Plastic, glass, leather, rubber and fabrics each need a different approach to cleaning and care inside a car. This guide helps you find the right product category, distinguish gloss from satin finishes and choose carefully around sensitive controls and surfaces you need to see through.

Koch-Chemie interior care covers products for cleaning, caring for and improving the appearance of vehicle surfaces, with the material in mind. The range includes products for plastic and rubber, glass and suitable leather, plus tools and fragrances. Start with the surface: a product for tough plastic trim is not automatically suitable for screens, steering wheels, pedals or open-pored leather.

A car interior brings many materials together in a small space. Around the dashboard, textured plastic sits alongside gloss trim, clear instrument covers, switches and air vents. Seats and doors can combine leather, synthetic leather, fabric, rubber and painted trim. Work through small areas one at a time, and test any cleaner or dressing in an inconspicuous spot first.

Your preferred finish matters too. Koch-Chemie Top Star "Ts" gives suitable plastic and rubber parts a satin finish, while Koch-Chemie Cockpit-Super-Pflege "Csp" is designed for a glossy look. Koch-Chemie Gummifix "Guf" is aimed at suitable rubber and plastic surfaces where slip resistance needs to be maintained. Glass cleaners, meanwhile, need to be buffed streak-free, with no dressing transferred from neighbouring surfaces.

• Identify the material: don't treat plastic, glass, leather, rubber and fabric with the same product.
• Choose your finish: satin, gloss, grippy and streak-free are different results.
• Clean before dressing: apply care products only once the surface is clean and you have assessed its condition.
• Keep tools separate: don't swap glass cloths, leather applicators and footwell brushes between jobs.

Detailing1's tip from the shop: Clean a small spot first and check it in daylight once dry. Then decide whether it needs any dressing at all, and which finish suits the rest of the interior. That way, a surface that's already matt and grippy won't end up glossy by accident, and you won't cover an old layer of dressing with more product.

The surface determines the right interior care

Material and condition guide your choice of interior products: textured trim, clear covers and leather each need their own suitability check. Plastic may have a soft-touch coating, a hard textured surface, a high-gloss painted finish or be transparent. What looks like leather could be synthetic leather or vinyl. A window may have film fitted; a screen isn't necessarily ordinary glass. If you're unsure of the material, check the vehicle documents and manufacturer's guidance.

Remove loose items and vacuum up dust, sand and crumbs before reaching for any wet products. Use a soft detailing brush to loosen particles in vents and gaps, picking them up as you go. This leaves less dirt to smear around and saves unnecessary rubbing on sensitive surfaces later.

Pay particular attention to surfaces you grip or step on. The steering wheel, gear lever, handbrake and pedals need to stay clean and grippy. A darker shine isn't a sign of a better result here. Clean rubber mats outside the car and refit them only when dry, so you can check the fixings, undersides and clearance around the pedals.

Cracks, sticky soft-touch coatings, flaking colour or open seams call for more than routine care. A cleaner or dressing cannot repair damaged material. First check whether professional repair is needed, rather than trying to hide a visual defect under more product.

Checking the material makes choosing easier: tough trim, sensitive clear surfaces, upholstery, rubber and fabric areas each get the appropriate product category. Fragrance, bottle size and your preferred application method come after that.

Temperature and moisture also affect the job. Cleaners can dry too quickly on hot surfaces, while wet upholstery takes longer to dry inside a closed car. Keep the interior well ventilated, avoid working on hot materials and allow enough time before seats, mats or belts are used again.

Top Star leaves a satin finish and Cockpit-Super-Pflege adds gloss

Top Star gives suitable plastic and rubber parts inside the car a satin appearance, while Cockpit-Super-Pflege is designed to leave a glossy finish. Satin suits many modern dashboards when you want a cared-for look without strong reflections.

Cockpit-Super-Pflege is an alternative if you deliberately want glossy interior trim. Make that choice with the surface in mind. A pronounced shine may suit an individual part; across a large dashboard or directly below the windscreen, reflections can become distracting. A small test patch shows whether the colour and gloss level work with the adjacent parts.

Don't apply dressing over dust. Clean the surface with a suitable product first and remove all residue. Once dry, check whether it already looks the way you want or needs further care. How the cleaned surface feels matters just as much as its colour.

Let Top Star dry after application, then wipe over with a clean microfibre cloth if needed. If you see dark edges, smears or uneven gloss, check the amount used, the cleaning stage and the material first. Adding more can build up the film without fixing the cause. Steering wheels, pedals and other safety-critical contact surfaces need more care than simply reaching for any plastic dressing.

For a closer comparison of satin and glossy interior finishes, head to Koch-Chemie interior plastic care. That collection focuses in more detail on what each product does and the result you want.

On older cars, a part may already have been treated with several different products. Clean especially cautiously and assess the patch only when fully dry. Uneven gloss isn't necessarily down to the new dressing: ageing materials, previous products or repaired areas can also affect the appearance.

Dressing residue on glass gets in the way of clear vision

Dressing residue on a window can affect visibility when light shines towards you. Glass cleaning is about a clear view, rather than adding gloss. Fingerprints, deposits from interior off-gassing and plastic dressing residue can all show up against the light.

Koch-Chemie Glass Cleaner "Gc" is a ready-to-use glass cleaner. Koch-Chemie Glas Star "Gla" is an alcohol-based cleaner sold by Koch-Chemie as a concentrate. Their similar purpose doesn't mean you use the same dilution or amount. Follow the product information for each one.

Use a small amount of product and check the surface with a second, dry cloth. Straight wiping passes make inspection easier. You can wipe horizontally inside and vertically outside to help tell which side a remaining streak is on. Finish by checking dry edges and the areas behind mirrors.

Screens, instrument covers and clear polycarbonate are not ordinary window glass. Top Star is specifically excluded from use on screens and polycarbonate. Follow the vehicle or component manufacturer's approvals when cleaning these parts. Don't reach for an alcohol-based product out of habit. Any tint or protective film also needs a clear compatibility check.

Finish the glass after the adjacent dashboard and door surfaces. That way, you only have to remove stray spray or fingerprints from the earlier stages once. Check the result from the driver's seat and with light coming from the side, not just while standing directly in front of the window.

Don't forget the inside of the rear window or the small quarter windows. Access can be awkward, so a manageable, neatly folded cloth works better than heavy pressure. Fogging that quickly returns can point to a remaining film; work over it carefully with a fresh side of the cloth.

Leather and rubber mats need different care

With leather, the type of material determines the care it needs. With rubber mats, secure fitting in the footwell and surface grip matter too. The manufacturer lists Koch-Chemie Leather Star "Ls" for smooth, suede and perforated leather, though cleaning, testing and applying sparingly remain important. Heavy colour loss, open cracks or sticky coatings fall outside routine care.

First clean suitable leather with a dedicated product and wipe away loosened dirt with a damp cloth. Let it dry completely before spreading a thin layer of care product. Don't flood perforations or seams. A white cloth helps you check later for colour transfer or excess residue.

Gummifix is designed for suitable rubber and plastic surfaces where a slip-resistant effect matters. That makes it particularly relevant for compatible floor mats and similar areas. Keep dressing off the pedals all the same, and let mats dry completely before refitting them.

Rubber seals, vinyl and plastic aren't interchangeable, even when they look similar. A care product for a mat won't automatically be the best choice for a door seal or upholstery. Read the stated material suitability and test cautiously on older or previously damaged surfaces.

Take care around seat rails, belt buckles and electric adjustment mechanisms too. Only operate moving parts once you've checked that no damp cloths or loose items are caught in the mechanism.

Clean tools stop dressing residue spreading to other surfaces

Clean brushes, cloths and applicators each have a different job inside the car: pick up loosened dirt and excess dressing, rather than spread them onto neighbouring materials. A soft detailing brush reaches vent slats and decorative stitching, an applicator sponge spreads a thin coat of dressing, and a microfibre cloth lifts loosened dirt or excess product. Stiffness, shape and cleanliness all need to suit the surface.

Don't use a brush on sensitive gloss trim or screens if it has just shifted sand from a door pocket. Keep glass cloths for glass only. Wash leather and plastic applicators separately, or replace them if you can't fully remove product residue. Colour coding can help you tell them apart, but you still need a clear system for what each tool is used on.

The manufacturer instructs you to apply Top Star and Cockpit-Super-Pflege to a soft sponge, then spread evenly over the suitable surface. Targeted application limits overspray around switches, seams and speaker openings. Where different parts sit close together, use a small cloth to shield the neighbouring surface from splashes. A smaller amount of product is generally easier to spread evenly and keep under control.

After use, wash cloths according to the contamination they carry and dry them fully. Fabric softener and washing them with oily polishing cloths can compromise later glass cleaning. Leave brush bristles exposed to dry, and don't store damp sponges in a closed container.

Damaged or hardened tools shouldn't go back onto sensitive surfaces. Before the next use, pay particular attention to cloth edges, foam and bristles. A clean, intact tool often does more for an even finish than another layer of product.

Think about access when choosing tools too. A flat applicator handles differently on a door card than in a deep handle recess. If it doesn't fit between adjacent parts, use a smaller tool instead of forcing the sponge into the gap.

Fragrance cannot replace cleaning or the final check

Only add fragrance to a clean interior after investigating the cause of any unusual smells. The final check focuses on clear vision, dry grip and secure mats. A musty or unusually chemical smell can point to moisture, dirt or excess product: find the cause first. A clean, dry cabin is the right starting point for a subtle fragrance.

The Koch-Chemie car fragrance collection keeps suitable fragrance products separate. Choose intensity and placement according to the product information, and avoid direct application to sensitive surfaces. More sprays won't make the interior cleaner and can be unpleasant for occupants.

Sit in the driver's seat for the final check. Look for streaks on the windscreen and mirrors, distracting reflections on the dashboard, and a dry grip on the steering wheel and gear lever. Mats must be secure in their fixings and clear of the full pedal travel. Seats, belts and contact surfaces should be dry.

Open the doors and check edges, door sills and under the seats. Moisture, cloths and small tools can easily go unnoticed there. One last look from the position of someone using the car is more useful than another layer of dressing on a finished part.

At the next clean, don't automatically dress everything again. Often, removing dust and light dirt and checking the surface once dry is enough. Use care products only where the material and appearance actually call for them. This avoids heavy build-up and preserves the original feel.

Koch-Chemie interior care then becomes a clear choice based on material and result: clean first, apply care products where needed, finish glass separately and go easy on fragrance. Paying attention to the surface and the finish you want gives you an interior that doesn't just shine, but feels clean, dry and pleasant.