BRANDS
Koch Chemie MZR Mehrzweckreiniger | High-Alkaline Interior Cleaner
$29.00 - $120.00
Koch Chemie · MZR · Mehrzweckreiniger · Multi-Purpose Cleaner
Heavy Artillery for
the Difficult Interior.
12.5pH Alkaline Strength. 1:5 to 1:50 Dilution Range. Professional Grade. For the job that other cleaners look at twice before starting.
MZR — Mehrzweckreiniger, German for "multi-purpose cleaner" — is the heavy artillery in the Koch Chemie interior lineup. Where Pol Star is the precision tool for regular maintenance and sensitive surfaces, MZR is what you reach for when the job is genuinely difficult: nicotine-saturated headliners, years of ground-in carpet grime, ink stains, grease that's had time to set.
This is a professional-grade cleaner at 12.5pH, and it performs accordingly. The dilution range is exceptionally wide — 1:5 for serious contamination all the way up to 1:50 for lighter work across multiple surfaces. That flexibility, combined with the alkaline strength, makes MZR one of the most cost-effective deep interior cleaners available. A litre goes a long way when you're working at the dilutions appropriate to the task.
pH
12.5
Professional alkaline strength
Dilution Range
1:5 – 1:50
Heavy soiling to light maintenance
Application
Interior
Carpet · fabric · hard surfaces
"The alkaline strength gives you a genuine capability edge — the kind of cleaning performance that lets you show a customer something they didn't think was possible."
— Koch Chemie · MZR Multi-Purpose CleanerWhat MZR removes
Nicotine Staining One of the most stubborn interior contaminants — nicotine penetrates headliner fabric, seat material, and hard surfaces over years. MZR's alkaline chemistry cuts through the buildup that surface cleaners never reach.
Oil, Grease & Set Stains Grease that's had time to bond to carpet fibers or upholstery requires alkaline chemistry to break down. At 1:5 to 1:10 dilution, MZR addresses contamination that has been sitting for months or years.
Ink & Soot Both ink and soot require a strong alkaline cleaner to lift — neutral or mildly alkaline products leave these behind. MZR removes them properly at appropriate dilutions.
Ground-In Interior Grime & Discoloration Carpet, upholstery, seatbelts, and rubber inserts that have accumulated years of use respond to MZR where lighter cleaners don't make a visible difference. Wide dilution range means the same product covers the full severity spectrum.
Dilution Guide
Start at 1:20 for general work and move toward 1:5 for severe contamination. Apply to a cool surface out of direct sunlight. Work in sections and do not allow the solution to dry before extraction or wiping.
1:5
Severe
Nicotine · set grease · heavy soiling
1:20
General
Starting point for most interior work
1:50
Light
Multiple surfaces · maintenance cleaning
Surface Compatibility
Safe to Use
Interior hard plastics
Carpet & upholstery
Headliners
Seatbelts
Rubber floor inserts
Avoid
Soft-touch plastics
Steering wheels
If you're turning around an interior that most detailers would look at twice before quoting, MZR is the product that changes the outcome.
Directions & Key Notes
Dilute to task · start at 1:20
Apply to cool surface · out of sun
Agitate · extract or wipe clean
Flush with pH-neutral water after use
Do not use on soft-touch or steering wheel
Do not allow to dry on surface
After use, flush the treated surface with clean water or a pH-neutral solution. At 12.5pH, MZR requires neutralization after application — this is standard protocol with any high-pH cleaner and prevents residue buildup on fabric fibers and plastic surfaces.
Test for colorfastness before first use at stronger dilutions. Required on any unfamiliar fabric — especially aged or previously treated interiors. Apply to an inconspicuous area and confirm no color transfer before proceeding with the full surface.
worth a look
