Working on this hydraulic fluid stain. Concrete is only 2 weeks old. Stain happened Monday, kitty litter was applied last night through this afternoon. First picture is after kitty litter. Second picture is after 3 coats of 5:1 double eagle with aggitation. Third picture is after groundskeeper 10:1 downstream, dwell 5+ minutes. Hot water rinsing. Can’t use surface cleaner because concrete is too new.
Any other thoughts or recommendations? We have Hurricane Heavy-Duty Degreaser, but some seem to think sodium hydroxide can deteriorate concrete or cause it to get dirty faster.
We also have EBC. Will probaly try that now.