Concrete Surface Preparation Video 2… Acid Etching
Most thin overlays, microtoppings, stains, and sealers only require a Concrete Surface Profile of 1, 2, or 3 for proper adhesion. For most structurally sound, relatively clean concrete slabs, this only requires an acid etch and/or power washing. The goal is to create a very light, sandy texture that can readily absorb water. Furthermore, acid washing and power washing remove most mild and moderate stains, soil, and contaminants.
This video highlights the necessary steps for completing a muriatic or hydrochloric acid etch. Starting with proper dilution rates and techniques. Generally, a ten-part water to one part acid dilution is enough to remove the cream layer from the concrete. Adjust dilutions based on desired profile and slab condition. Wet the concrete with water to slow the acid reaction and allow the acid to spread out. Agitate the acid and keep it from drying using a broom. Neutralize it using Brickform Neutra Clean or a mixture of water and baking soda. Rinse and pressure wash to complete the process.