Other suitable acids for etching include phosphoric acid and sulfamic acid. The latter is an especially good choice for first-timers because it is much less caustic and dangerous than the other acids. [2] X Research source If you’re unsure of whether you have the right type of acid, check the label on its packaging — most suitable products will mention that they can be used for concrete etching purposes.
You’ll also want to give the area a good sweeping to remove accumulated dust, dirt, or grime. The acid needs to be able to touch every part of the concrete’s surface to react properly with it. Even small pieces of debris can interfere with the reaction, potentially causing an uneven etching.
Alternatively, try using ordinary laundry detergent. Most detergents are formulated to dissolve oil and grease, making them perfect for degreasing your concrete surface.
If you’ll be etching up to any adjacent walls or other surfaces, be sure to also wet the bottom inch or so to minimize the possibility of direct contact with the acid.
Always pour acid into water. Never pour water into acid. If acid splashes back into your face, it can lead to disfiguring injuries or even blindness. From this point forward, you’ll want to observe basic acid safety measures. Wear long sleeves, gloves, eye protection, and, if necessary, a face mask to protect against any fumes. For more information, see the safety section below.
Always pour acid into water. Never pour water into acid. If acid splashes back into your face, it can lead to disfiguring injuries or even blindness. From this point forward, you’ll want to observe basic acid safety measures. Wear long sleeves, gloves, eye protection, and, if necessary, a face mask to protect against any fumes. For more information, see the safety section below.
If you don’t immediately see bubbles, your mixture probably isn’t strong enough. Consider carefully adding more acid.
The floor needs to stay wet the entire time you are acid etching. Don’t let the acid dry on the floor — if you need to, hose down areas that are drying out.
Inspect the surface as the acid works. You want the acid to be reacting evenly and uniformly across the surface. If there are spots where the acid isn’t reacting, this can be a sign that an unnoticed grease stain or sealant was present on the concrete. In this case, you may need to use a mechanical solution, like a grinder, to finish etching the concrete. [4] X Research source
For a general, all-purpose acid neutralizer, try mixing 1 cup of baking soda in 1 gallon (3. 8 L) of water, then mixing until it dissolves. [5] X Research source
Alternatively, if you’re working in a garage, you may be able to simply rinse your neutralized solution directly out of the garage and into a drain. Check your local regulations before doing this — you don’t want to break the law or hurt the environment.
Chemical safety glasses or goggles with face shield Gloves Long sleeves Close-toed shoes
If the acid’s fumes are strong, use a breathing mask with acid vapor cartridges to prevent injury.
It may be helpful to keep a second bucket or plastic container with you while you work. If you accidentally pour acid into the first container first, you can pour water into the second container and then transfer the acid to it to easily correct for your error.
It may be helpful to keep a second bucket or plastic container with you while you work. If you accidentally pour acid into the first container first, you can pour water into the second container and then transfer the acid to it to easily correct for your error.
It may be helpful to keep a second bucket or plastic container with you while you work. If you accidentally pour acid into the first container first, you can pour water into the second container and then transfer the acid to it to easily correct for your error.
