Chemical stains applied to new, old or remodeled concrete or construction is called as concrete stain. Containing metallic salts which react with the concrete and becoming a permanent part of the concrete, concrete stain is also known as acid stain. Black, brown and blue-green are the color groups that are manufactured by most concrete stain manufacturing companies.

When is stain applied?

Many contractors are of the opinion that stain should be applied immediately after the concrete is placed. This will give the stain a richer and more intense color. There are other contractors who advise that the concrete should cure for a period of ten to twenty-five days before stain can be applied to the concrete. But it is definitely advisable to finish the staining, sealing and the covering of finished work before the contractors move on. This will save time on cleanup and can also take care of damage repair while the construction is in progress.

How is concrete stain applied?

Concrete stains can be applied either using a sprayer or using a paintbrush. Although sprayers are used for the application of stains, care must be taken that the sprayers do not contain any metal parts and also rated low on acids. This is because the acids may affect the metal which in turn will affect the final color of the stain. Using a paintbrush can solve this problem. However it is important to take care that brush marks do not become too visible.

Factors that determine the final color of concrete stain

Besides the application of stain on concrete just after it is laid or after a certain number of days, there are other factors that play an important role in determining the final outcome of stain application. These could include the concrete used, its properties and its finishing quality, the weather conditions at the time of applying the stain and the concrete age and moisture content at the time of application.

Other equipment for applying stains

Some contractors may use a grinder or a buffing machine equipped with sanding pads. Power-washing equipment can also be put to good use when applying stain. Workers need to make use of proper safety equipment such as gloves, boots, goggles and facemasks. Equipment also needs to be acid-resistant. For a good cleanup after stain application, wet vacuums are highly recommended.