F9 Groundskeeperis our industrial concrete maintenance cleaner. This will make the concrete absolutely “POP”, remove tire marks, soils and grime in the process. It is used when topical oil stains have been pre-cleaned and the stains are actually at or beneath the surface of the concrete. When using this maintenance cleaner, your customers will be telling you that they have never seen their concrete so clean… and this clean will last longer than when usingANY and I mean ANYhigh pH cleaner. Concrete cleaned with F9 Groundskeeper will stay cleaner longer and be easier to clean the next time around. From my personal experience and from what other contractors who have been using F9 Groundskeeper are reporting, after cleaning the same concrete 2-3x with F9 Groundskeeper, the time spent cleaning the same contracts have been reduced by 25-40%. This is Big! Time is money!Typical dilution for F9 GK is never less than 10:1. Normal dilution is 10:1 to 15:1.