I purchased an American Standard 4834.ST acrylic shower base to install in my basement bath. The instructions call for the base to be set in a bedding material, to achieve a level fit and provide support. From the looks of it the bedding will end up about ¾ to 1 inch thick (after the base has been seated into a level position). I went to Home Depot and they seemed confused by what I was doing but sold me VersaBond Fortified Thin-Set Mortar. I was wondering if this was a good product to use for this application? I would like for my work to be done correctly and have a good life to it and avoid unnecessary repairs. As I have read a few articles on the subject I was also considering a layer of plastic between the mortar bed and the bottom of the shower base; to avoid a permanent bond between the two surfaces so the shower base wouldn’t get damaged if it ever had to be removed in the future.