I have around 44m2 prep to do over the ufh which is the 'warm up sticky mat' system on a concrete subfloor, ill be doing a 10mm screed (5mm per coat) so a 2 day prep. Originally thinking just using up my NA I have but Im thinking I could also use stopgap 114 because I have 12 bags of it in the cave so buy whatever extra I need. I haven't done many electrical ufh preps, always been water system but have always NA when I have What would/do you use?