AUTOSOL® PRECLEANING PREMIUM - NTA FREE The extremely strong cleaning power is specially designed to meet the high demands of professional users in the prewash area in vehicle wash facilities. All types of dirt and insects dissolve in a very short time. It is also very suitable for acid-free rim cleaning. Suitable for all water and hardness treatment plants. pH value: 13.5 Recommended final dilution: 1:40 - 1: 1000