Floor Tiling adhesive and sealing question?

I have taken up some old slate tiles in my kitchen. Whatever adhesive was used when they were laid down seems to me to be oil based.





As modern tile adhesives do not like oil, Is it a good idea or not for me to use PVA glue on the floor to act as a sealant and when dry add the tile adhesive?Floor Tiling adhesive and sealing question?
You need to determine what it is they are laid on. If you have oil contamination in the screed that needs to be dealt with. Either by removing the contaminated layer of the screed, and re-screeding, most drastic but safest, or apply an epoxy based primer before fixing tiles down.


If it is bitumen, as in the type used to fixed old vinyl tiles, then because of its unstable nature (bitumen is soft when warm, and hard when cold), you will need to remove at least 80% before fixing your tiles.





Oh and keep PVA from tile applications. PVA doesn't like water.


Try a SBR, or an acrylic primer such as BAL APD.Floor Tiling adhesive and sealing question?
It is probably bitumen based. You should use a primer recommended by the adhesive people. PVA may not be too keen on oil either, of course.
uhu