Etching Acid is manufactured for very smooth/power floated floors, it’s a highly concentrated blend of non-fuming acidic compounds and cleaning agents, specifically developed to prepare concrete floors prior to applying paints and other protective coatings.
Etching Acid reacts immediately on the concrete surface, attacking any laitance and thereby opening up the surface to give the concrete a texture of fine sand paper. Fine bubbles of foam are produced during this process. Once the bubbles have ceased, etching is completed. If the floor is then thoroughly rinsed with fresh water, there is no need to apply a neutralising agent and the freshly etch surface allows the epoxy to bond tightly.