its thin crap whatever it is. I have not bothered to take a ruler to it.
Bottle of X400 sat waiting for adding today - at some point when I completely wake up
So the X400 is now in the system after a complete drain & refill, the radiators re all hot (well they would be as I turned it up higher than "just enough to stop water freezing" that the wife has it set to). lol
Going off the screwfix reviews I'm expecting the heating to work lots better, the hot water to be hotter, my car to run faster and my sex life to improve with this stuff being in there
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