Shower tray levelling on anhydrite screed.

Hi, I’m in the middle of a self build and I am about to fit a slimline shower base on an anhydrite screed. I know I can’t use a cement based bedding on the screed. Has anybody got any suggestions for an alternative? I was thinking of maybe using bonding plaster?

 

Isolate it with primer & then use a cement bed maybe?

 

Maybe a compatible tile adhesive and primer
Or just primer and levelling compound

 

Thanks for your reply

 

I think I’ll try the primer and levelling compound. Thanks