More damage can be done at a higher strength, in different ways to not using it at all mind. Keep it to what it says on the bottle and kindly tell the guy that sold it you to get some product training, free from Dunlop too.
1:1 water and additive if that's what it says.
Note that when you do this, you generally get less working time with the adhesive, and it's near on impossible to clean your trowels after you've used it if you have left them for an hour or so, so work clean and in small quantities 'till you're up to speed and comfortable!