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September 25 - September 29, 2017

Can you provide recommendations on ways to make sure an acid stain can be successfully applied to an existing horizontal concrete surface?


Selected Answers

From Jeff Donius of Premier Veneers on September 26, 2017:
Although it entails a great deal of work, the approach is pretty basic and straightforward. 1) Get the concrete as clean as possible so that when you wet out the concrete in the project space, the water absorbs uniformly and does not reveal any construction contaminants or stains that do not appear when the concrete is dry; and 2) Do several 12" square test sections, using different colors, in an inconspicuous area, such as a closet, stairwell, utility room, or area of the concrete that is to receive a different type of flooring, making sure that that concrete has been cleaned in the same manner.

From Zenith Czora of Parex Davco on September 25, 2017:
Acid stains create natural, variegated or mottled look. They are ideal for newer concrete without a lot of cosmetics defects and discoloration. Acid stains will actually highlight existing defects. It is not applicable to any surface that already has a concrete sealer or curing agents or older concrete surfaces where free lime has already leached out. Acrylic stains are more preferable because they create a more consistent appearance and will help hide blemishes and discoloration. They are better for older and more porous concrete. They are also much more user-friendly and less toxic because they are water-based or water-extended. Doing a test patch is recommended to determine if your desired result is achievable.

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Tagged categories: Coatings Technology; Staining


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