How to Acid Stain Concrete

Acid staining concrete is a great way to give a unique and durable finish to concrete floors, patios, and other surfaces. Here are the steps to acid stain concrete:

1. Prepare the Surface: First, clean the concrete surface thoroughly to remove any dirt, grease, or other contaminants. Use a pressure washer or a scrub brush with a solution of water and a mild detergent. Rinse the surface well and let it dry completely before proceeding.

2. Protect the Surrounding Area: Acid staining can cause damage to nearby surfaces or materials, so it's important to protect them with plastic sheeting or tape. Cover any nearby plants, furniture, or other items that could be affected by the acid stain.

3. Apply the Acid Stain: Acid stain is a mixture of acid, water, and mineral salts that reacts with the minerals in the concrete to produce a unique color and pattern. Apply the acid stain with a sprayer, brush, or roller, starting from the far end of the area and working your way back. You can also use a pump-up sprayer for larger areas. Be sure to wear protective clothing, gloves, and goggles when applying acid stain.

4. Allow the Stain to React: Let the acid stain sit on the concrete for several hours, following the manufacturer's instructions. The longer the stain sits, the darker the color will be. Check the surface periodically to see how the color is developing.

5. Neutralize the Acid: After the stain has reacted, neutralize the acid with a solution of baking soda and water. This will stop the chemical reaction and prevent the acid from continuing to etch the concrete surface. Apply the neutralizer with a sprayer or mop, then rinse the surface thoroughly with clean water.

6. Seal the Concrete: Once the surface is completely dry, apply a concrete sealer to protect the acid stain and give it a glossy finish. Use a sprayer, roller, or brush to apply the sealer, following the manufacturer's instructions. Allow the sealer to dry completely before walking or placing any furniture on the surface.

With these steps, you can acid stain concrete to create a unique and durable finish that will last for years to come. Just be sure to follow all safety precautions and manufacturer's instructions when working with acid stain.