The Medway Handyman wrote:

Found a self levelling floor compound at a local tile supplier that will
easily take a 40mm difference. The manufacturers don't claim as much, but
the tile shop had a display sample over 50mm thick.

Comes as a 25kg bag and a 5 litre of latex solution.

How much was that? I used one like this many years ago, but the price
was rather steep at about £25 / bag.

Bloody good stuff, I will use it again.

I have used the Wickes "latex" leveling compound recently[1] a couple of
times. It was about £14/bag IIRC. It mixes with water rather than latex
liquid but seems to go on and behave in a very similar way. They also
say in the instructions that if you want to level in thick sections then
you can mix it with sharp sand for the initial screeding to get the
level mostly right, and then do a second coat with an ordinary water
only mix.

[1] not tried the cheaper non latex levelling compound they do, so don't
know how much worse (if any) that is.

--
Cheers,

John.

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