Because the tarmacadam composition to be exact on the concrete is just about 60 years weak and we tried everything to remove.? ...

Sub floor, pump/tank (well), and septic issues?
Answers:    Hire a concrete sub contractor and/or:

Sand blast the tar weekly off or

Have him use a grinder to remove the treatise off.

Cheers and well brought-up luck!
Why paint interior walls using the "W" first...
pressure washer. Some residual staining will remain.