Skip to main content
Stesso

Apply Acid to Concrete Floor

2:49
8:08
354K views

At 2:49 in

Instructions & Tutorials Preparing Concrete For Epoxy. Acid Etching Hacks.

Watch on YouTube

What happens here

Once the acid solution is mixed, the pump sprayer is pressurized by pumping the handle. The acid solution is then applied to the concrete floor, starting from one corner and working across the garage. The presenter emphasizes working methodically to cover the entire area evenly. As the acid reacts with the concrete, it will turn yellow and produce a fizzing action, indicating that it is actively etching the surface. The goal is to achieve a texture similar to 100-grit sandpaper, which can be tested by rubbing one's feet or hand on the surface. If any oil or dirt spots are present, apply more acid to those areas until the reaction occurs.

Goal: Etch the concrete to a rough, porous finish.

Tools and materials

  • Eye Protection — Protection from acid splashes
  • Plastic Pump Sprayer — Spraying the muriatic acid onto the concrete
  • Respirator with Acid-Grade Filters — Protection from acid fumes
  • Rubber Boots — Protection from acid
  • Rubber Gloves — Protection from acid contact

What they say

Hide

I go ahead and hit stop. Now I'm going to start adding pumping up my sprayer so this acid will start to come out. I'm going to start spraying it. I'm just going to work from one corner and work my way across the garage. And I'll show you how I go about doing that. When I'm spraying this acid, you want to spray it down. And you should see it. You'll start to see it turn yellow. And when it's yellow, it's actively etching and eating away the concrete. And you want to spray enough where it's actually etching it away. As it eats it away, I can rub my feet on it to make sure I can feel it rough enough. And I've been doing it enough years that I can tell when it gets rough enough. But you want it to be fairly rough. If you see any dirt spots, any oil spots, you can spray a little more acid on those oil spots.

Auto-generated from the video audio.