My home was built in 1964 with hardwood floors throughout. Upon removing the tile from the bathroom I found what I thought was "tar paper" stuck to the hardwood. People told me later that it is commonly called "black maime" or "black mastic".
I have tried using a heat gun, a floor sander, and water. This junk will not come off!! Any chemical suggestions?
I have tried to attached a picture, the floor sander removed some of it in the threshold (I don't have a current pic). (But I see itdidn't work
)
Thank you
