We Say
Vorreiniger B is a purpose-built, professional alkaline pre-cleaner designed for situations where conventional pre-washes simply don’t have the chemistry required. This is not a cosmetic foam or a mild citrus cleaner — it’s a controlled, high-performance product intended to remove heavy traffic film and oily road contamination before contact washing.
The strength of Vorreiniger B comes from its alkaline surfactant system, which actively breaks down greasy, organic dirt at a molecular level. That makes it particularly effective on lower panels, wheel arches, door shuts and commercial vehicles, where contamination is bonded and persistent.
Crucially, this product is about control rather than brute force. When diluted correctly and used with proper dwell management, Vorreiniger B delivers exceptional cleaning performance while remaining predictable and manageable. In professional workflows, this significantly reduces the need for mechanical agitation later in the wash — which is where paint damage most commonly occurs.
This is not an everyday maintenance product. It’s a deliberate tool for heavy contamination scenarios, and when used as intended it forms the foundation of a safer, more efficient wash process. In our opinion, this is the right tool when you need to deal with heavy contamination properly before contact washing. It takes the hard work out of the first stage and makes the rest of the process safer, which is exactly why it’s part of our core range.
Key Features
Alkaline Yes (Heavy contamination)
Pre-Wash Primary (Contact reduction)
Concentrated High (Dilution control)
Description
Koch Chemie Vorreiniger B is a highly concentrated alkaline pre-cleaner formulated to remove heavy traffic film, greasy road contamination and organic build-up prior to contact washing. It is widely used in professional wash bays, workshops and detailing environments where fast, effective pre-cleaning is essential.
Typical dilution guidance:
✔ Heavy soiling & commercial vehicles: 1:5
✔ General traffic film: 1:10 – 1:20
✔ Light pre-wash & maintenance: up to 1:30
Vorreiniger B is particularly effective on lower panels, wheel arches, engine bays and door shuts, where oily road film accumulates. Used correctly, it significantly reduces the amount of bonded contamination remaining before contact washing.
In a structured wash process, Vorreiniger B is typically followed by a foam pre-wash and a neutral contact wash to safely remove remaining dirt. Suitable follow-up products can be found in our Snow Foams & Equipment collection.
Specification
| Product Type | Alkaline pre-cleaner |
|---|---|
| Chemical Base | Alkaline surfactants |
| pH Range | Alkaline |
| Dilution Range | 1:5 – 1:30 |
| Application Method | Spray / foam |
| Use Stage | Pre-wash |
| Compatible Surfaces | Paint, plastics, rubber, stainless steel |
| Intended Use | Heavy traffic film removal |
| Concentration | Highly concentrated |
| Typical Environment | Workshops & car washes |
How To Use
1) Assess contamination: Determine the level of soiling to select the correct dilution. Heavier, oily contamination requires stronger dilution.
2) Dilute correctly: Mix Vorreiniger B with clean water using a chemical-resistant sprayer or foam system, following the dilution guidance above.
3) Apply to cool surfaces: Apply evenly to cool panels only, focusing on lower panels, wheel arches and high-contamination areas. Do not apply to hot surfaces or in direct sunlight.
4) Controlled dwell: Allow a short dwell time to break down contamination. Do not allow the product to dry. Lightly re-mist if required.
5) Rinse thoroughly: Rinse using high-pressure water, working from the bottom up to fully flush loosened dirt away.
6) Continue wash process: Proceed with a foam pre-wash or neutral contact wash. Vorreiniger B is designed to reduce contamination before contact, not replace it.
Important usage notes:
✔ Never allow the product to dry
✔ Avoid prolonged contact on sensitive surfaces
✔ Always test on an inconspicuous area first
✔ Wear appropriate PPE when using alkaline cleaners