You spelt 'Black magic' wrong, try asking again and you might get a proper answer
You would use a solvent to dissolve the mastic, which will make it easier to remove. There is a plethora of solvents available that are specifically for black mastic, including some that are environmentally safe. Type in "solvent for black asbestos mastic" in Google for a list of products.
Probably Mastic
Exposure to black mastic asbestos can lead to serious health risks such as lung cancer, mesothelioma, and asbestosis. It is important to avoid contact with this material to prevent these health issues.
It is called Mastic. It is the adhesive that used to be used for floor tiles. Warning: Most mastic contains asbestos
The address of the Mastic Peninsula Historical Society is: Box 333, Mastic, NY 11950-0333
IS 1195/1196 mastic with 25 mm thickness
There is little difference except mastic means 'from plant origins'.
Mastic gum is mainly used for treating gastrointestinal ulcers, poor circulation, yeast infections, and breathing problems. Mastic gum seems to have little or no side effects for most people. Mastic is a part of a tree, so the only problem would be if you are allergic to certain trees, you may be allergic to Mastic Gum.
Mastic is an adhesive not a flooring some manufacturers say it can be used on floor tiles how ever I would not recommend using mastic on a floor as it would take forever to cure
When using mastic to install a tile backsplash, it is important to follow these best practices: Ensure the surface is clean and dry before applying the mastic. Use a notched trowel to spread the mastic evenly on the surface. Press the tiles firmly into the mastic, making sure they are level and aligned. Allow the mastic to dry completely before grouting the tiles. Follow the manufacturer's instructions for proper application and drying times.
It will often work on certain kinds of mastic. Worth a try.
No, remove the old stuff, scrape it off with razor blade or similar then reapply