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My kitchen floors are heart pine which were tiled about 45 years ago when a "tar" was used. I have heard that this "tar" will interact with the stain and could create black spots if I sand, stain and seal the floor.
Hi, I found this stuff called GOOF OFF that removes the glue and does not affect the wood. The only pain in the butt is the scraping but its well worth it. I am still trying to figure out how to get the white marks off my hardwood floor that had tile on it first:(
Good luck and hope it goes well
That black, tar-like substance was under my linoleum, also. I soaked it with water and DAWN dish soap. It came up with the $30 scraper from Home Depot, found in the flooring department. Let the dish soap work for 10-12 minutes, but scrape wet, do not let it dry out. Black stuff gets soft, then hard. Will re-soften if you re-soak.