Lacquer thinner will remove it from most materials.
You must tell us what you are removing it FROM !
Black Knight roofing tar .
Lets start with a better question.. it will all depend on whether it is: If it is brown if it is cream colored if it is black like tar answer that & we can help
Remove the adhesive.
To remove tar from a skateboard, start by applying a small amount of rubbing alcohol or a specialized adhesive remover to a cloth. Gently rub the affected area until the tar begins to break down. For stubborn spots, you can use a plastic scraper to lift off the tar, being careful not to damage the skateboard's surface. Finally, clean the area with soap and water to remove any residue.
you need to scrape it up. you can chemically remove the residual. or mechanically grind it up if doing tile.
A good bug and tar remover should work fine Vegetable oil or WD40 work just fine for removing adhesives.
You just lay it on, then roll it.
FML!!! I HATE TaR
its like a black blob
Black heroin
Put ice on it then try to peel the tar off