ACID STAINING


Acid staining is a process in which an aqueous solution of metallic oxides and inorganic acid is sprayed over an existing concrete surface. The acidic solution of metallic oxide reacts with lime (Calcium Hydroxide) present in the concrete yielding insoluble, colored compounds that become a permanent part of the concrete.
 

The resulting concrete surface looks very interesting; the variegated and natural look of the end product is its most attractive feature. Since there are only a limited number of metallic oxides that react with lime, available colors are limited to shades of black, brown, orange and blue-green.

Factors that affect the outcome of the acid stain color:

  • Cement properties and amount
  • Type of aggregates and admixtures used in concrete
  • Concrete finishing methods
  • Concrete age and moisture content when stain is applied
  • Efflorescence
  • Curing methods
Since the color outcome of an acid stained floor depends on so many variables, we advice our customers to be ready for surprises. Novatech Surfaces has satisfied many customers by using Dyes over an acid stained surface. However, if you are looking for a specific shade of a specific color, acid staining is not right for you.

NOTE – If your concrete surface has been cured using cure-n-seal type product, or if it has been painted, you can still get an acid stained floor by way of resurfacing the existing surface with a polymer modified concrete.

Acid Stain Color Chart:

Select Color Base: