How flexible is Self levelling compound??

17 Oct 2015
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United Kingdom
I've just finished replacing all my floorboards in the kitchen (suspended floor) with 18mm plywood.
It's reasonably level and I've used a lifetime supply of screws.

But there are still a few dips when I skim a large spirit level over some areas.
I've seen screwfix do a 'flexible self levelling compound' Which says it's ok for wooden floors..
There's not much flex and the floor feels pretty solid.

How much flex can self levelling cope with? I don't want to pour it down and in a weeks time have issues when I've put the vinyl floor back down.
Any advice or experience?!
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Some are better then others.
A good one which you might be able to source is
TA Level flex
Ardex FA20
Stopgap 700
Mapei renovation

Made sure you prime the area you are putting the screed down in.

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