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How to remove black mastic from hardwood floor?

13 years ago

We're fixing up an older house in preparation for moving. After taking up the filthy carpet, we discovered that underneath are hardwood floors in 2 rooms which are covered with tile and black mastic. (I guess that's what it is?) How do I get the mastic or adhesive--whatever it is-- off without damaging the hardwood? (And yes, I'm aware of asbestos, it wasn't tested but we're taking proper precautions.)

I read online that boiling water will do it, but what would that do to the hardwood? Or do I need a citrus solvent (if so, brand recommendations?) or something else?

I really would like to save the hardwood if possible. I don't mind the rustic look and good thing because I can't refinish the floors right away.

Any tried and true advice would be MUCH appreciated. We're not living in the house yet but will be working there this weekend.

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