Sorry about this Sir Ramic - it's all very confusing and I can't understand why you were given that information - here is a section from page 9 of the instructions we issue with the Tilesafe membrane regarding adhesives....(this can be seen in the downloads section of the Impey-Showers website).
"DO NOT use solvent based floor tile adhesives or epoxy or polyurethane based adhesives. It is
recommended that a single part cement based flexible floor tile adhesive is used (NOT ready
mixed)"