How do you encapsulate vinyl asbestos tiles and black mastic in a home basement?
I would fill any voids where there are missing tiles. If you want to paint the tiles that encapsulates it but the underlayment foam for the floating floor will be enough to do the same. If you do not use a underlayment foam the flooring will wear through paint and even some less expensive epoxy paints so a quality underlayment helps in the long run to decouple cold, moisture from the slab.