If efflorescence begins to occur on any part of a building, it is pretty much impossible to stop. Aside from balconies and tiling, efflorescence is a common sight excreting from rendered walls on many buildings in Sydney. By having Efflock in render, efflorescence will never occur, plus the render will be hydrophobic, therefore resisting rising salt damp, lateral damp and falling damp that can affect paint finishes. It is also a common sight to see paint blistering from render as a result of moisture that has entered a porous wall, pushing the paint coating off the wall. This is known as hydrostatic pressure.
It is interesting to read in Dulux Paint's technical notes, that efflorescence is impossible to successfully paint over. It's also interesting that any new concrete should be a maximum of 10% moisture content prior to painting. that means many days or even weeks of fine weather before a rendered wall can be painted without it raining. How often does that occur?! A rendered wall that has Efflock impregnated in the render mix allows moisture from hydration to permeate, while repelling rain, allowing the wall to dry out thoroughly prior to painting.