THANK YOU ! .
I was looking and reading the comments and found this stuff that says used where trolley jacks and safety stands are used :
https://www.amazon.com/gp/product/B01KSYPCIC/ref=ox_sc_act_title_1?smid=ATVPDKIKX0DER&psc=1
It appears to be close to the Home Depot SAKRETE stuff although no one says they used trolley jacks over it .
Home Depot is not far away, maybe I'll try this stuff first as there's a review showing wide and deep cracks that were repaired with it .
? Should I wet the concrete just before applying it ? .
I understand I need to seriously clean and degrease the damage before .