/diy/ - Do It Yourself

What the actual fuck do I use to get rid of this stain on my driveway?

I have no idea what it was. I think it might have been an animal or something that decided to die right there. I was gone for over a month and when I came back this stain was there and I power washed the remains.

I tried absolutely everything to get it out, from rust-out to muriatic acid to bleach.
I put concrete sealer on my driveway the year before, so the sealer might have helped it to bond with the concrete or something.