I have an 1890's that someone had glued 1970's shag carpet to oak hardwood floors. Also had a maple hardwood floor in the kitchen with several layers of linoleum glued down with the black adhesive. After trying sanding, adhesive remover, paint stripper and scraping someone told me the solution that does work! It will sound counterintuitive but you mix a strong solution of TSP cleaner in a bucket of hot water. Then mop this solution onto the floor keeping it wet for 40 min or so. The TSP solution will turn the glue to mud which can be easily scraped off. When nothing else worked, this took care of the problem. If you leave the oak flooring wet too long, it can warp, but I used this method in 3 rooms and then was able to sand and finish and they turned out beautiful. The maple floor cleaned up beautifully as well! Attempting to sand the glue mess off the floor will fill up sandpaper sheets almost immediately - the TSP method works!!

The only real concern about asbestos is when you sand it and it gets micro size and then inhaled. Just being on the slab is not a concern health wise. You say your slab "sweats" you may have issues with any type of flooring. Aside from tile. If this project is designed to spend as little as possible and just to cover the slab than i think your plan will be fine. Ideally if money and time was not an issue, you would want to test for asbestos. Clean the slab, diagnose the moisture issue, fix said issue(s) and then lay youre perferred flooring.

hi my case: Son has an old house (1960). Most of house had dirty carpet when bought and had a flooring company replace carpet without looking under it. Now, years later decided to remove carpet. Under carpet were the 9x9 tiles. Most tiles were okay, but several were broken so took all tile out (they mainly popped up, but some broke and also did some scraping). Some dust was made, but could be from carpet and pad. Mopped floor after. Under tiles is the black cutback mastic, now uncovered. Area is about 200 sqft. Got rid of the tiles so cant be tested, but I assume to contain asbestos. Also removed carpet in a bedroom (10x10), which also has tiles underneath, but left the tiles in place and covered most of area with an area rug. Doubtful any protective masks were used, and certainly not by others living in the house at the time, as well as now. Questions: Is that level of exposure serious (been a few months since removed)? Are roommates at any risk? Can just walking on the exposed mastic release fibers? Should air get tested? What can be used to cover the cutback mastic? Wants to lay vinyl sheeting in the area (or anything else recommended?). Is it okay to re-lay carpet in the bedroom over the tiles? Should he/me be too concerned? Yes, it's done, but knowing risk level will help. Thanks

Home Depot have a daimabrush disc that you can rent for a buffer. You can also get a 5” disc for a angle grinder. Do be careful, daimabrush can gouge your wood floors. You can Also use diamond cup wheels. There are wheels designed to scrape off mastic. shredder wheel is also available for angle grinders, but will be a special order. Look for granite and concrete grinding suppliers in your area For specialty wheels. Not sure if, Granquartz is located in your area. But you can search them up online.