Does Tile Adhere to Redgard?

For tile installations bonding directly to the substrate; strongly recommended to apply at least one full coat of "undiluted" RedGard® to the "dry" primed area and allow to dry completely before tile installation work is to begin.

Can you tile directly over redguard?

You need a full coating for the product to be effective. When you are finished you should let the walls completely dry for a day before tiling. Your tile can then be installed directly onto your walls over the membrane with a proper thinset mortar.

Will thinset adhere to RedGard?

From what I have read, the premixed thinset does not dry out to form a good adhesive bond when applied over/under a non-permeable membrane like Redguard or the Kerdi-band products. The dry mix (where you add the water on-site) does.