A decent proportion of water, we must agree does soak into the substances it makes contact with....it dosn't magically disappear, it defies laws of chemistry,if fast setting adhesives or plasters are used the water content needs to evaporate/dissipate, before totally cured.....so to grout them before proper set time, is to trap unwanted moisture......Gaz
I honestly do not know why you seem to have a problem wth this.
How long did you used to wait before grouting floors you laid with Bal Rapid set, that says it can be grouted after 2 hours?
Did you wait until that was 100% cured, or set enough, according to manufactures spec's, to grout?
This stuff sets fast. The makers, ho have no doubt spent a fortune developing it, say it can be grouted an hour. I think they know far more about it than you or I.
I will continue to follow their advice, and my experience.
----
this stuff could be handy....have you used it much, if so...how have you found it..Mark.
I use it pretty often. It is great to work with. Much easier to trowel onto walls than cement based addy.
You have about 40 minutes working time with it, but you need to keep the bucket you mix in clean.
If you do not, the mix goes off quicker, because the addy that has already started to go off causes the new mix to go off faster than it should. Nothing to do with evaporation, Gaz.
----
so whats the working time on unique? whats the cost as well?
As I said above, around 40-60 mins, but only if you keep your bucket clean of old mixes.
I pay just under a tenner for a 15kg bag.
One thing I will say, it does not cover as much as the 10-15sqm they claim.
I would say more like 6-8sqm per bag.
----
i use it all the time but its not recommended for wet areas. i spoke to the main rep at a trade evening and he said it will be ok for domestic showers. great gear to use and holds large tiles up without battens. but beware you have to be pretty fast with it.

I was told the same, fine for domestic showers.
I use their Tilers Grout too, which is waterproof, not just water resistant. And if it's a power shower I add a bit of Enhancer 2002 just to be safe.