self levelling compound - Tile Advice

[schakal]

I am about to start levelling the concrete kitchen floor soon and I have a bit of a question regarding the self levelling compound I have.
It is the Ultra Level It One Self Levelling Compound
and on the packaging it says 3 to 50mm bed thickness .

Does this mean i am not able to feather the slc in down to nothing
in places ?
After checking the floor throughly , i can see i need to fill in from max 4mm down to 1 mm or less in places to get to the correct height before tiling.

 

[Dumbo]

1mm of levelling won't smooth very well .
Do it 4 to 7

 

[schakal]

The problem is ,i cant raise the levels that much due to transition with the hallway floor.
I am quite confident i will get the finished floor nice and level using more adhesive. But what is the maximum thickness of adhesive i can get away with ?
Tiles are 20cm x 20cm ceramics at 10mm thick.

 

[schakal]

Can i lay more self levelling compound on already cured (2 days) self levelling compound ?
If yes , do i need to primer the surface of the SLC that is already cured?

 

[Flintstone]

Yes and yes

 

[schakal]

Thanks for a fast reply