Yallah: 02 4257 2611
Bomaderry: 02 4423 5111
Batemans Bay: 02 4472 4944


Decorative Concrete - Internal Stains

About Acid Stain

Stained Concrete Floor under a pianoAcid Stained floors are growing in popularity. Many people are looking to stained floors as an alternative to carpet, tile and wood.

Internal Acid Stained Concrete Showing a Range of PatternsAcid Stains are not a paint, a coating or a sealer. Acid Stained Concrete is a colouring process involving a chemical reaction on a cementitious material. A solution made with water, acid and inorganic salts reacts with minerals already present in the concrete.

How Do Acid Stains Work?

All concrete has calcium hydroxide as a biproduct. This is slaked lime. This picks up carbon dioxide from the air and becomes calcium bicarbonate. This is effluorescence. These are the chemicals that the stain reacts with.

Acid stains are made from hydrochloric acid, wetting agents and metallic ions. When this solution is placed on concrete, it colours the concrete by chemically combining the metallic ions with the particles in the concrete to form oxides. The result of this reaction is colour.

Chemical stains can be applied to new or old, plain or coloured concrete surfaces. Although they are often called 'acid stain', acid is not the ingredient that colours the concrete. Metallic salts in an acidic, water-based solution react with hydrated lime (calcium hydroxide) in hardened concrete to yield insoluble, coloured compounds that become a permanent part of the concrete.

Selecting the Right Stain

A striking Acid Stained concrete floor in a family roomThere are many manufacturers of Acid Stain. Most produce stains in 8 colours that are variations of three basic colour groups: black, brown, and blue-green.

For more photos, visit our Gallery.

Useful Links

YALLAH  [map]

70 Princes Highway
Yallah 2530
Ph: 4257 2611
Fax: 4257 2599

Yallah Supply Centre


1 McIntyre Way
Bomaderry 2541
Ph: 4423 5111
Fax: 4423 5105

Bomaderry Supply Centre


1 Russell Lane
Batemans Bay 2536
Ph: 4472 4944
Fax: 4472 4922

Batemans Bay Supply Centre


© 2016 SCDCS