Firstly I apologise to the original thread starter for this sway off-course, if you IM I'll personally send instructions how to do the job correctly or if you're within easy reach I'll send someone to explain the process in person; can't be fairer than that.
Terry if you're going to look at datasheets please look for the correct thing, just look at these links off the parent site: contains sodium hydroxide, corrosive and ethylene glycol monobutyl ether for further toxicity. It even says these details on the labels.
Datasheet
MSDS
As far as Aqua Mix is concerned you should dwell for only 3 - 5 minutes if the tiles are without a coating, but this is a generalisation like any product supposedly suitable for a wide range of tiles. Once size doesn't fit all.
Now Terry, I didn't want this to be personal but I have to be honest you are worrying me. If you really are running a professional service at professional rates why are you firstly using a DIY product and more importantly why do you not know what is contained within these products? Calling a rep isn't going to get you real answers, only what you need to hear anyone established in the business will know that.
An MSDS datasheet isn't a list ingredients it only contains what is deemed hazardous or potentially hazardous and it differs from country to country, hence why there's ingredients of the cleaner which are not disclosed.
The ethylene glycol monobutyl ether contained is a hazardous organic solvent and should be treated as toxic, hazardous enough to be on the California restricted chemical list and in many parts of the US you need to inform and train your personnel about the solvent. Which makes even more sense not to be advising the general public to dwell sections of the floor and naturally keep an eye on it, because we don't want it to dry out as we know it will because of the ingredients contained.
All that inhalation of toxic organic solvents; not nice.
Doug I'm sure you're top chap and you're probably thinking you doing a good thing thanking terry for the last post, but really all you doing is condoning the distribution of incorrect information, which only goes toward damaging a forum members tiles. That's not something I would thank. A good forum relies on quality information.