Talked to Watco. They advised that indeed it's not essential to remove all the old paint, but it should be sanded or roughened to give the Flowtop a good key. Since the old paint will have already sealed the underlying screed, it's not necessary to apply the Primer 1, just the Primer 2 (P1 will...
Thanks again! I was looking at industrial epoxy floor coatings from companies including Watco, where I came across their floor repair self levelling compound, Flowtop. This seems like a much better choice than the Mapei 3240 for my purposes. Most importantly, it is suitable as a finished floor...
Thank you Job. You’re absolutely right—Mapei do not suggest 3240 can be used without a finishing layer. And that why I’m asking for your help. How can I finish it? A company called Resincoat produce coloured and clear resin finishes that appear to be compatible, they also do a 1-part floor...
Short version:
I'm planning to pour Mapei 3240 SLC onto the rather rough concrete screed (which is damaged in some places) in my flat, in which are laid underfloor heating cables. 3240 has a compression strength of about 25N/mm^2 and it's flexible so I hope it might be suitable as a finished...