Impey tanking membrane underfloor heating and self lev compound

[jolyonwag]

I spent ages preparing my wet room with impey tray and tanking system . I'm on a wooden floor (25mm ply) in upstairs bathroom and I want to protect the underfloor heating mat so tiler can start the wall first without damaging the heating mat. Could someone please recommend a good flexible self levelling compound compatible with the tilesafe membrane? I don't intend to let the latex level the Pre formed tray.
I used mapai fiberplan on my kitchen floor, but I didn't have the membrane, and there is some doubt about its compatibility.
Thanks in dance for an advice

 

[Dave H]

Arditex NA sticks to most things, but getting ardex to ok anything is nye on impossible

 

[jolyonwag]

Arditex NA sticks to most things, but getting ardex to ok anything is nye on impossible

Many thanks for this:I have just ordered the arditex NA. any suggestions about how to stop the latex running into the impey tray:ie some sort of temporary barrier that will not only fit round the perimiter of the tray, but can also temporarily seal between the heating wires, which cross over into the tray?