I'm not familiar with that brand.
Under the mixing directions it should give you the recommended amount of either water or acrylic admixture.
If it says to only use water, then the additives are in a powdered state and become activated by moisture.
I'm not a fan of the water mixed products.
IMO, Mapei Kerabond/Keralastic system is the absolute top of the line product. I've been using Hydroment lately, however.
I offer the lifetime guarantee on my work, though.
KT