Only rapid set thinset or any type of modified thinset or redi poxy should be used to lay tile on the pan.
Tile redi mortar bed.
Brush drain adhesive pvc or abs as applicable inside the drain connection located at the bottom of the drain which is integrated into the shower pan set the shower pan carefully into the mortar bed and the drain.
You are now ready to tile to the shower enclosure.
Allow the mortar bed to dry in accordance with the instructions of the mortar bed manufacturer.
My contractor recommended the tile redi product and i was excited to use this product it was a little bit more expensive than a regular wet bed installation but i was ok as i thought i am getting.
Redi poxy is included with the purchase of all tile ready shower pans and benches and is also available for sale separately if you want extra.
Materials have worked well with tile redi shower bases.
Redi poxy is a chemical resistant epoxy adhesive used to set tile on tile ready brand shower pans and benches.
And quickrete mortar mix 1102 7.
Some have found success using a bed of spray foam lay it down into the soupy bed of mortar moderately press it in place then check with a level.
Use a generous amount of versabond tile mortar in about a 1 bed temporarily framed with a 2x4.
Allow the mortar bed to dry in accordance with the instructions of the mortar bed manufacturer.