Koch-Chemie Hydro Plast Care "Hpc" Plastic Care Concentrate (Water-Dilutable) 1000ml

Koch-Chemie Hydro Plast Care cares for plastic and rubber with an adjustable gloss level

What is Koch-Chemie Hydro Plast Care? A water-dilutable plastic care concentrate that works neat as a high-gloss finish and at 1:4 as a matte original look. Not suitable for leather, fabric, Alcantara or hot parts straight after a drive.

Koch-Chemie Hydro Plast Care is a water-dilutable plastic care concentrate from the Koch-Chemie Klassik line that lays down the same care base neat as a high-gloss finish and, at 1:4 dilution, as a matte original look. The solvent-free formula with a subtle vanilla scent protects plastic and rubber from UV and slows down re-soiling, because dusty air clings far worse to the closed care layer.

• One concentrate. Four gloss levels. Neat or 1:1 gives you high gloss for tyre sidewalls and bumpers, 1:2 delivers medium gloss, 1:3 a satin sheen and 1:4 the natural original look for dashboards and door trims. One canister covers the whole gloss spectrum, so the second product for the opposite finish simply drops off your shelf.
• Inside and out from the same bottle. Cockpit, door cards, bumpers, wheel arches and tyre sidewalls all take the same product. The formula is solvent-free, so it's cleared for the interior, with no harsh chemical smell on the first drive home after a detail.
• A per-litre price that drops with the dilution. 1 litre of concentrate makes up to 5 litres of ready-to-use care at 1:4. On paper that's enough for 25 to 30 full cockpit passes, so about 45 cents per job. The 5-litre canister pulls the per-litre price down noticeably from the second car on, or in day-in day-out commercial use.

Day-to-day from Detailing1: The most common slip-up with Hydro Plast Care is spraying the concentrate straight onto dusty or greasy plastic. The care layer then sits on top of the dirt instead of lifting it, the surface looks fresh but pulls dust back in twice as fast within a few days. Degrease with APC first, wipe it dry, then spray. That way the care bonds with the plastic, not with the grime layer on top of it.

Neat for high gloss. 1:4 for the original look.

You apply Hydro Plast Care neat to tyre sidewalls and glossy exterior parts. Diluted at 1:4 it gives the matte original look for dashboards and door trims.

The dosing sets the gloss level, not how much you put on. The concentrate goes into an empty spray bottle or onto a clean sponge. Lay it down thin and even on the dry, degreased surface, let it flash off for 2 to 3 minutes and buff out with a microfibre cloth.

Per car interior you'll work out around 20 to 30 millilitres at 1:4, and for neat application on four tyre sidewalls 30 to 40 millilitres covers the full set. For door seals and rubber profiles you go 1:1 and apply with an applicator brush, that keeps them supple without any shine.

For the cockpit we'd suggest 1:3 or 1:4, so the light doesn't bounce up into the windscreen and the dash doesn't look freshly oiled from the driver's seat. On bumpers and trim strips in matte plastic you work at 1:2. If you're prepping tyres for a photo shoot, apply neat to the dry sidewall and leave it for 5 minutes, no working in needed. You'll find the kit to go with it in the Plastic Care category.

Mix the amount you need for the day fresh, not in advance. A diluted solution in an open spray bottle pulls in air after 5 to 7 days and loses gloss, because the surfactant structure slowly separates out. For commercial use, write the mixing date on the bottle with a waterproof marker and bin the leftovers after a week, that's cleaner than the "give it another good shake" approach.

For the order in the workflow: vacuum the interior first, then degrease, then apply Hydro Plast Care. Outside it goes on after the wash and before the tyre care. If you do the tyre care first and then treat the bumper next to it with the gloss coat, you risk overspray on tyre sidewalls that haven't dried off yet, the result is patchy and won't just wipe back to right.

Solvent-free means UV protection without the chemical smell.

Hydro Plast Care lays a thin, flexible film as a UV barrier over the plastic. That slows fading and embrittlement, which tend to show up on black dash parts after two or three summers.

Black plastic in the interior hits surface temperatures of 70 to 90 °C in summer sun. Under that load the plasticisers migrate to the surface and get broken down by UV, the plastic goes grey, rough and starts to creak. The care layer from Hydro Plast Care doesn't replace those lost plasticisers, but it slows the UV reaction down.

Because the formula does without classic solvents, no aggressive fumes evaporate as you apply it. The product is cleared for the interior, no smell to deal with on the first drive home and no irritation for people who react to volatile hydrocarbons. The protective layer cuts the static charge on smooth plastic surfaces noticeably, which slows how fast dust settles between care intervals.

The clear limits: Hydro Plast Care isn't meant for leather, Koch-Chemie has its own products for that with Pol Star "Po" and Leather Star "Ls". The concentrate doesn't get on with fabric seats, headliners or Alcantara either, because the care film would gum up the textile fibres.

Let hot plastic parts after summer drives cool down for at least 15 minutes, otherwise the product burns in streaky and you end up buffing it off again. If you'd rather have a silicone-oil-free premium product from the Koch-Chemie Klassik range and can do without the water dilution, Plast Star "Pss" is the one. If you'd rather have pure interior use with a ready-mixed dose, grab Top Star "Ts".

For detailers with a shelf. Not for once a year.

Koch-Chemie Hydro Plast Care pays off for anyone running several cars at once or keeping the same car in shape week in, week out. One bottle neat, the same bottle diluted, one purchase covers interior and exterior.

It's less of a fit for occasional users who give their car a thorough detail once or twice a year. A concentrate only pays off with regular use: if you rarely dilute, you lose the price edge to shelf life, because an opened bottle can go cloudy after about 24 months. In that case a ready-dosed product from our Koch-Chemie category is the smarter buy.

A verified customer review of the 5-litre canister puts this honestly: if you're used to the Klassik version ready-to-use, the dilution step feels like extra work, and for that type of user Plast Star "Pss" is the better fit, not the concentrate. A second voice from the 1-litre bottle, by contrast, makes a point of the yield. Both bits of feedback show the same thing: the dilution curve isn't a blanket upside, it's a way of working that has to fit your workflow.

The four pack sizes cover different use profiles. The 1-litre bottle is the way in for one car and gives you around 5 litres of ready-to-use care after 1:4 dilution, enough for 25 to 30 cockpit passes. The 2×1-litre set and the 3×1-litre set are meant as a stash for detailing enthusiasts who run the family car, the second car and the seasonal car side by side.

The 5-litre canister is clearly worked out for detailers, workshops and fleet care and pulls the per-litre price down noticeably, at full 1:4 dilution it works out to 25 litres of ready care. If you're emptying the canister commercially, fill the spray bottle up front with the amount you need for the day and reseal the main container straight away, so the emulsion doesn't pull in air for nothing.

Our strongest hands-on insight from our own details: applying Hydro Plast Care straight after the wash onto lightly damp-wiped plastic saves you a whole step compared to solvent-based classic care. The water-dilutable concentrate spreads more evenly on a damp surface, as long as the surface is degreased and not dripping wet.

Store frost-free between 5 and 30 °C and use it up within 24 months of opening, that way the emulsion stays stable and you hold the set gloss level for the whole life of the container. Below freezing the emulsion separates, and a shake won't fully bring the mix back together after that.

Application of Koch-Chemie Hydro Plast Care

Dilute, apply, buff

Dilute the concentrate before use: neat or 1:1 for high gloss on tires and bumpers, 1:2 for medium gloss, 1:3 for satin gloss, and 1:4 for a natural original look in the cockpit. The dilution determines the gloss level — not the application quantity.

Pour the ready-to-use solution into a clean spray bottle or onto a new sponge. Spray thinly and evenly onto the dry, degreased surface, allow to dry for 2 to 3 minutes, and buff with a clean microfiber cloth. For a vehicle interior, 20 to 30 ml of a 1:4 dilution is sufficient; for a complete set of tires, 30 to 40 ml neat is sufficient.

Degrease beforehand with an all-purpose cleaner — this is the step that is often skipped and is responsible for the short durability experienced by many users. Without degreasing, the protective layer settles over the dirt instead of dissolving it, and the surface then gets dirty twice as fast.

Notes: Do not use on leather, Alcantara, fabric seats, or headliners — for these, there are Pol Star “Po” and Leather Star “Ls”. Allow hot plastic parts to cool for at least 15 minutes after summer drives, otherwise the product will burn in streaks. Mix diluted solution fresh and dispose of residues in open spray bottles after 5 to 7 days — otherwise, the emulsion will slowly separate and lose its gloss performance. Store frost-free between 5 and 30 °C. Use within 24 months after opening.