Koch-Chemie Vb Prewash is a professional alkaline pre-cleaner designed to remove heavy road film, bugs, oils and traffic dirt before the contact wash stage. pH 13.1 • 1L.
Removes heavy dirt and grime
Helps loosen dirt before contact washing
Safe on most surfaces
Economical dilution ratio
Dilute 1:8 – 1:20
Apply from bottom upwards
Leave for 1–3 minutes
Rinse thoroughly with water
Depending on the dirt accumulation: precleaning: 1:30 to 1:50. Rim cleaning: 1:3 to 1:10. Copolymer dewaxing: 1:5 to 1:10. Self-service high-pressure washing: 1:300. Apply over whole surface, allow to react for a short time and use a high-pressure cleaner to rinse off thoroughly. VDA conform to class A: reaction time max. 5 min, max. application concentration 1:300. Class B: reaction time max. 1 min, max. application concentration 1:30
Do not use on hot surfaces.;Do not let dry.;Before using, check suitability and compatibility.
Yes, when diluted correctly and rinsed before drying.
Use 1:8 for heavy dirt and up to 1:20 for lighter contamination.
No. Do not allow the product to dry on the surface.
Powerful, highly concentrated and professional-grade, Koch-Chemie Vb Prewash helps remove heavy dirt and road film safely before contact washing.