How Clean n Etch Works
Clean n Etch reacts immediately on the concrete surface, attacking any concrete laitance thereby opening up the surface to give the concrete a texture of fine sand paper.
Fine bubbles of foam are produced during the process. Once the bubbles have ceased, etching is complete.
The cleaning agents in Clean n Etch then come into play allowing any soil and fine sand disturbed by the etching process to be washed away. If the floor is then thoroughly rinsed with fresh water, there should be no need to apply a neutralising agent, but best to check that the pH is above 6 as bonding problems can occur if the surface retains traces of acid.
Normally, neutralised residues can be safely flushed to the drain. The freshly cleaned, etched and dried surface allows paint and other coatings to bond tightly.