"It gets confusing to an old codger like me when some items of a similar product are listed in different units, i.e. litres and kilograms. This was the cheapest option; boy was there a lot of it. I only needed to do 8 300 x 300 tiles so there's lots left over. I'm trying to keep it hidden so old codgeress doesn't get any more ideas. ;-)"
"A little thicker than some, and less "creamy", but does the job, and much cheaper than many. Non-slip? Well, mostly. If you're tiling downwards - and let's face it, from time to time we all have to do it, though it's far from ideal, then it's not actually non-slip unless you can hold each tile for a minute or so. It's /very nearly/ non-slip - which in a way is almost worse than it not even trying to be because it can catch you out. For all that, it does do the job well enough, for for the price it's excellent. I do wish ScrewFix wouldn't make all the fields compulsory - but until they fix it, I'll continue to make an arbitrary guess about reliability when I have no clue as to how long-lasting it is. This time, I've guessed three stars."