Acid Stain gives concrete a mottled, variegated, marblelike look. It creates beautiful colors on concrete, mostly earth tone browns, reddish browns, and greens. You can also create your own shades by mixing and matching available colors or applying them at different rates. Never expect Acid Stain to be uniform or have an even tone. You will have different reactions from slab to slab and even on the same job you may see different coloration patterns.


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Supplies Needed:

  • Phosphoric acid-based solution
  • Advanced 410 Cleaner & Degreaser
  • Plastic water sprinkling can
  • Pump up sprayer Water hose for clean up & dilution
  • Plastic sheets to cover walls/foliage
  • Blue painters tape Ammonia or Baking Soda (neutralizing) Water or solvent-based clear sealer or Armor-thane Clear

Product Preparation:

Always wear protective glasses and gloves during all phases of preparation and application. New concrete must cure for a minimum of 28 days. Use Advanced 410 Cleaner & Degreaser (1:2 parts water) to rinse thoroughly to ensure a clean, dry and residue-free substrate to be acid stained. When staining somewhat aged (10-20-year-old) concrete, use a phosphoric etching solution to open up the pores of the concrete. As always, use plenty of water to rinse the prep products off. Due to the nature of these stains, the final color may vary throughout the installation depending on the age, texture, finishing techniques (trowel method), and other variables within the concrete ALWAYS perform a test area before final installation, including a clear topcoat as that will change the final appearance of the stain as well.

Product Application:

Protect all areas not to be stained. Mask off adjacent surfaces with painter’s tape, or duct tape, and plastic sheeting. For best results use a plastic pump-up sprayer (not galvanized or stainless steel) which will avoid track lines. A circular motion with the wand works best. Additional coats can be applied right away, no need to wait for the stain to dry. It’s also common to use mops, sponges, soft-bristle or foam brushes, rags or other faux technique tools to achieve the desired

Advanced Acid Stains can be diluted with water up to 1:1. Dilution simply allows for more color options, a much lighter brown than offered, for example. But don’t dilute any more than 1:1. Lighter colors should be applied first if “layering” the colors (example if a gold color with browns is desired, apply the gold first, the darker color will be easier to see/apply rather than light over dark). Full strength: Apply at a rate of up to 400 sq. ft. per gallon. Always use an acid-resistant plastic sprayer.

Allow the Advanced Acid Stain to dry a minimum of 4-8 hours (stain should show no moisture and have a chalky like residue). Neutralize the surface with a sponge style mop with 1 part ammonia OR baking soda solution to 8 parts water. Remove standing water with a wet vacuum. Mop and flush with water until rinse water is clean. Allow the area to dry over night (24-48 hours is recommended). Use a urethane or solvent or water based sealer (Advanced Aliphatic-Polyurethane Clear, Advanced Solvent Based URO Sealer or WB90 High Gloss Water Based Clear Sealer). Keep in mind the solvent based sealers will darken the final appearance of the color/project; be sure to include this step in your sample/test area.

Two coats of any clear coat is recommended.

Clean-up: Use soap and warm water. Dispose of containers in accordance with local and federal regulations.

Precautions: All HVAC ventilation ducts should be somehow blocked prior to application so acidic fumes are not distributed. Storage in area between 50°F and 85°F recommended.

Additional information


1 Quart, 1 Gallon