Sealer or primer for cutback emulsion (bituminous/tar mastic/adhesive) on concrete floor?

Small kitchen with concrete floor (Not ground floor. i think concrete was used for the floor was as sound insolation.)

We removed sheet vinyl. Underneath and partly lifting with the vinyl was asphalt tile. The cutback is old (estimate 30 years) There's almost no odor in left the cutback.

The cutback partly chips and scrapes off (more likely theconcrete is coming off because the concrete floor surface appears inconsistently troweled).

Having given up on the huge time requirement and complications of flooring other than vinyl, i'd like most to use sheet vinyl again. Among those complications i'd like to avoid is nailing down "particle board" type underlay. The recent vinyl was glued (actually siliconized cauilk, by the looks of it) at only the doorways. The vinyl was high quality (thick, heavy non-fiber (foam?) backing), and had no loose areas, so adhesive seems unnecessary. Longest floor dimension in any direction is about 8 feet.

For the existence of sheet underlay for sheet vinyl exist? (i haven't searched much yet about this.)

Are there reliable sealers for tar-based coatings? And safe for indoor use. :-)

If i can't find info, i'll soon try shellac type primer before installing the sheet vinyl.

TIA

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Choise76Smu
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