Tiling using gulfstone quartz on bathroom floor

[juliaaaa]

Hello am planning on laying 5m of 30x30cm Gulfstone Quartz tiles on our bathroom floor ( the blingy sparkly ones). upon reading the box it says the tiles should only be layed using a latex based adhesive quartz flooring minneapolis? i am tiling directly onto a bitumen type over concrete floor? could anyone just clarify for me the correct adhesive to use? Thanks in advance